The final concentration of the solution is 2.75 * 10^-3 M.
What is dilution?We know that the stock solution is the solution from which we are able to prepare other solutions. The concertation of the stock solution is always seen to be higher than the concentrations of the other solutions that are obtained from it.
Given the dilution formula;
C1V1 = C2V2
C1 = initial concentration
C2 - final concentration
V1 - initial volume
V2 - final volume
Thus we have;
4.68 x 10^-3 M * 250 mL = C2 * 425 mL
C2 = 4.68 x 10^-3 M * 250 mL/425 mL
C2 = 2.75 * 10^-3 M
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Missing parts;
A cough syrup contains red dye #40, with a concentration of 4.68 x 10-3 M.a.If you dilute the cough syrup by adding 175 mL of water to a 250. mL sample of the cough syrup, what will be the final concentration?
nitrogen-13 undergoing positron emission Express your answer as a nuclear equation.
Nitorgen-13 undergoing positron emission and form of carbon-13 and a positron particle .
The nuclear equation is given as ,
[tex]^{13} _{7}N[/tex] → [tex]^{0} _{+1} P[/tex] + [tex]^{13}_{6} C[/tex]
where P represents proton , C represent carbon , and N represent nitrogen .
Nuclear equation is the symbolic representation of reaction occur in with nucleus . Positron emission , also known as positive beta decay (+-decay), occurs when a proton in the parent nucleus decays into a neutron that stays in the daughter nucleus. The daughter nucleus then emits a neutrino and a positron , a positive particle with mass similar to an ordinary electron but an opposite charge .
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I want to know what effect salt has on the growth of grass. So I measure out 3 equal sized squares of grass out the back of the Green Building. The first square of lawn I water with 5 liters of pure water from a watering can every day. The second square of lawn I water with 5 liters of pure water with 2 grams of salt mixed in, every day. The third square of lawn I water with 5 liters of pure water with 4 grams of salt mixed in, every day. I measure the height of the grass after 14 days and note the following observations. The first square is green and 15 cm high. The second square is green-yellow and 6 cm high. The third square is yellowy-brown and looks dead and is only 2cm high.
From the outcome of the experiment, we could infer that the salt inhibited the growth of the grass.
Drawing inferences from observationsThe following were observed from the experiment:
Grasses watered with pure water were 15 cm high and appeared luscious greenGrasses watered with water plus 2 g dissolved salt appeared greenish-yellow and were 6 cm high. Grasses watered with water plus 4 g dissolved salt appeared dead and only 2 cm highThus, we can conclude that:
Dissolved salt has an inhibitory effect on the growth of the grass.The more the dissolved salt, the more the inhibitory effect.At a certain threshold concentration, salt has the capacity to kill the grass.More on drawing inferences can be found here: https://brainly.com/question/19617610
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The complete question goes thus:
Observation: I want to know what effect salt has on the growth of grass. So I measure out 3 equal-sized squares of grass out the back of the Green Building. The first square of lawn I water with 5 liters of pure water from a watering can every day. The second square of lawn I water with 5 liters of pure water with 2 grams of salt mixed in, every day. The third square of lawn I water with 5 liters of pure water with 4 grams of salt mixed in, every day. I measure the height of the grass after 14 days and note the following observations. The first square is green and 15 cm high. The second square is greeny-yellow and 6 cm high. The third square is yellowy-brown and looks dead and is only 2cm high. What could we infer about the effect salt has on the growth of grass?
Covert 1.34×103 μg /ML to Mg/pL
1.34 × 10³μg /ML is equivalent to 1.34 × 10⁹ mg/pL. Details about how to convert micrograms to milligrams can be found below.
How to convert micrograms to milligrams?Micrograms is a unit of mass equal to one millionth of a gram, or 0.000001 grams. It is denoted by the symbol μg.
Milligrams is equivalent to one thousandth of a gram.
Also, millilitre (mL) is a unit of measure of capacity, being one thousandth of a litre while picoliters is one millionth of a microlitre i.e. 10-¹² litres.
The conversion factor of μg/mL to mg/mL is as follows:
1 microgram/millilitre = 0.001 milligram/millilitre
1.34 × 10³μg/mL = 1.34mg/mL
The conversion factor of mg/mL to mg/pL is as follows:
1 millilitre = 1000000000 picolitres
1.34 mg/mL = 1.34 × 10⁹ mg/pL
Therefore, 1.34 × 10³μg /ML is equivalent to 1.34 × 10⁹ mg/pL.
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the number 234.306 rounded off to five significant figures is
Answer:
234.31
Explanation:
234.306 = five significant figures
234.31 = rounded to five significant figures
A cube of an unknown metal was dropped in a graduated cylinder containing 45.0mL of water. After the metal cube sank to the bottom of the graduated cylinder, the water level read 45.5mL. If the metal cube weighs 10.7grams what is the identity?
A.) platinum: D= 21.4 g/cm^3
B.) Gold: D=19.3g/cm^3
C.) silver: D=10.5 g/cm^3
D.) Copper: D=8.92g/cm^3
Answer:
Explanation:
A
Methane (CH4) combines with oxygen gas (O2) to form carbon dioxide (CO2) and water (H2O). Describe the number and type of atoms for a molecule of each substance.
The number and type of atoms for a molecule of each substance are better understood by the given balanced chemical equation.
[tex]CH_4+2O_2[/tex] → [tex]2H_2O+CO_2[/tex]. What type of reaction is this?This reaction involves the combustion of methane in order to synthesize carbon dioxide and water. So, this reaction is also known as a combustion reaction.
According to the context of this question, one molecule of methane significantly reacts with two molecules of oxygen in order to form one molecule of carbon dioxide and two molecules of water.
Therefore, the number and type of atoms for a molecule of each substance are well represented by a balanced chemical equation.
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Your lab partner obtains 5.36 grams of a 3% hydrogen peroxide solution.
What is the other 97%?________________
What is the mass of hydrogen peroxide (H2O2)?
1. The other 97% of the solution is water
2. The mass of hydrogen peroxide (H₂O₂) is 0.16 g
1. How to know what the other 97% stands forA solution is made up of solute and solvent. Since we were told that the solution is 3% H₂O₂. It means the other 97% is water
2. How to determine the mass of H₂O₂The following data were obtained from the question:
Percentage of H₂O₂ = 3%Mass of solution = 5.36 gMass of H₂O₂ =?The mass of H₂O₂ can be obtained as illustrated below:
percentage = (mass of solute / mass of solution) × 100
3% = Mass of H₂O₂ / 5.36
Cross multiply
Mass of H₂O₂ = 3% × 5.36
Mass of H₂O₂ = 0.03 × 5.36
Mass of H₂O₂ = 0.16 g
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Suppose that you find in a reference book that the volume of all the oceans is 1.4×109km3 . To find the mass, you can use the density of water, also found in this reference book, but first you must convert the volume to cubic meters. What is this volume in cubic meters?
The correct answer is 1.4 x 10^18 m^3.
The simple definition of density is the quantity of a substance (in terms of mass) per unit volume. The Latin letter D or the lower-case Greek letter, pronounced rho, are frequently used to represent it. The definition of density is given by the equation ρ = m/v, where m stands for the substance's mass and v for its present volume. Density is evidently directly proportional to mass and indirectly proportional to volume according to the equation. Pressure and temperature are two elements that influence a substance's density values. A substance's density value will increase with increased pressure and decreased temperature since these changes result in a reduction in volume.
V = volume = 1.4 x 10^9 km^3
we know that , 1 km = 1000 m = 10^3 m
hence , V = volume = 1.4 x 109 km3 = 1.4 x 10^9 (10^3 m )^3 = 1.4 x 10^18 m^3
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Calculate the theoretical yield of KCl produced when 15.39 grams of Cl2 reacts.
Assume excess potassium. (K = 39.10 g/mol; Cl2 = 70.9 g/mol; KCl = 74.55 g/mol)
2 K + Cl2 à 2 KCl
Taking into account definition of theoretical yield, the theoretical yield of KCl produced when 15.39 grams of Cl₂ reacts is 32.36 grams.
Reaction stoichiometryIn first place, the balanced reaction is:
2 K + Cl₂ → 2 KCl
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
K: 2 molesCl₂: 1 moleKCl: 2 molesThe molar mass of the compounds is:
K: 39.1 g/moleCl₂: 70.9 g/moleKCl: 74.55 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
K: 2 moles ×39.1 g/mole= 78.1 gramsCl₂: 1 mole ×70.9 g/mole= 70.9 gramsKCl: 2 moles ×74.55 g/mole= 149.1 gramsDefinition of theoretical yieldThe theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.
Theoretical yield of KClThe following rule of three can be applied: if by reaction stoichiometry 70.9 grams of Cl₂ form 149.1 grams of KCl, 15.39 grams of Cl₂ form how much mass of KCl?
mass of KCl= (15.39 grams of Cl₂×149.1 grams of KCl)÷ 70.9 grams of Cl₂
mass of KCl= 32.36 grams
Finally, the theoretical yield of KCl produced when 15.39 grams of Cl₂ reacts is 32.36 grams.
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Define atomic radius.
The atomic radius is the total distance from an atom's nucleus to its outermost orbital of electrons.
What do you mean by Atomic radius?The atomic radius is the total distance from an atom's nucleus to its outermost orbital of electrons. A chemical element's atomic radius is described as follows: the usual or average distance between the nucleus's core and its outermost electron shells.
What does an atomic radius mean and how big is it?A molecule's atomic radius is determined by dividing the distance between neighboring atoms of the same element in half. It is challenging to determine the atomic radii of chemical elements because an atom's size is on the order of 1.210-10 m.
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Density is an intensive physical property because the density of a given substance does not change with the size of the sample true false
This statement about density is True.
The mass of a material substance per unit volume is known as density. The equation for density is d = M/V, where d represents density, M is mass, and V is volume. Density is often measured in grams per cubic centimeter. For instance, water has a density of 1 gramme per cubic centimeter, compared to Earth's density of 5.51 grammes.
The kilograms per cubic metre unit is another way to express density (in metre-kilogram-second or SI units). For instance, the weight of air per cubic meter is 1.2 pounds. The densities of typical solids, liquids, and gases are listed in textbooks and manuals. Through density, it is simple to calculate a body's mass from its volume or vice versa.
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A solid block of substance is 78.0 cm by 55.0 cm by 35.0 cm and it weighs 569 g. What is its density in g/cm3?
If a solid block of substance is 78.0 cm by 55.0 cm by 35.0 cm and it weighs 569 g then its density is 0.00379 g/cm³.
Density of a substance = (mass of the substance)/(volume occupied by the substance)
Mass of the substance = 569 g.
Length of the block = 78.0 cm
Breadth of the block = 55.0 cm
height of the block = 35.0 cm
Volume of the substance = length x breadth x height
= 78.0 cm x 55.0 cm x 35.0 cm
= 150150 cm³
Density of this substance = 569 g/150150 cm³
= 0.00379 g/cm³
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What does the Law of Conservation of Mass state? (1 point)
O Matter cannot be rearranged during a chemical reaction.
O The total mass of all of the reactants prior to a chemical reaction must equal the total mass of all the products after the reaction.
O Matter is neither created or destroyed in a chemical reaction, only rearranged.
O The total mass of reactants prior to a chemical reaction is greater than the mass of the product due to the release of energy
Answer:
(Question) What does the Law of Conservation of Mass state?
(Answer) The total mass of all of the reactants prior to a chemical reaction must equal the total mass of all the products after the reaction.
(Question) If the mass of elements before a chemical reaction is 30 grams, after the chemical reaction, the mass will be __.
(Answer) 30 grams
(Question) 78 g of potassium (K) react with 71 g of chlorine (Cl) to produce potassium chloride. According to the Law of Conservation of Mass, what is the mass of the product (2KCl)?
(Answer) 149 g
(Question) 2 grams of potassium (K) reacts with 5 grams of Oxygen (O). According to the Law of Conservation of Mass, how many grams of potassium oxide (K2O) will be produced?
(Answer) 7
(Question) Which of the following equations demonstrates the Law of Conservation of Mass?
(Answer) CH4+O2→C+2H2O
Explanation:
just finished the quick check. enjoy
The correct statements are statement 2 and statement 3 about conservation of mass.
To understand this, let us first understand the Law of Conservation of Mass.
The Law of Conservation of Mass was given by Antoine Lavoisier in 1789.
It states, "a mass in an isolated system can neither be created nor destroyed by chemical or physical transformations. It can only change its form. Also, in a chemical reaction, the mass of reactants is equal to the mass of products."
Now that we know the Law of Conservation of Mass, let us understand the statements given in the question.
Statement 1 is a wrong statement because in a chemical reaction, mass cannot be created or destroyed, but it can be re arranged. We can use the reactants of any mass and can be rearranged. The mass of the reactants will be the mass of the products. Rearranging the mass of the reactants won't create new mass or destroy the mass present.
Statement 2 is correct because we have mentioned above that the law states that in a chemical or physical reaction mass of reactant is equal to mass of products. The total mass which we use remains the same, it doesn't change, hence, making no changes in the total mass of the products. Taking a very simple example of an eraser, we can prove it. If we take an eraser and cut it into small pieces, then, the eraser (reactant) will not change its mass when cut into pieces (product) but only will change its form (shape). Thus, we can see that the total mass of product is equal to the total mass of the reactant.
Statement 3 is also correct. Mass can neither be created nor destroyed, only rearranged. We can know this by a simple example of NaCl (Sodium Chloride). If we take 2 g of Na and 3 g of Cl then the product will have the same mass as 5 g of NaCl. In this reaction, we can rearrange the mass by either adding the reactant's mass or by interchanging the mass of reactants. But in any case, the total mass of product will be equal to total mass of reactants.
Statement 4 is wrong because the chemical reactions are energy releasing. Sometimes the physical reactions are also energy releasing but energy is not mass. Mass and energy are two different terms. The Law of Conservation of Mass states about mass particularly. We might even provide energy or energy might release but that won't affect mass. For example, if we have taken 10 mL of water and after providing energy, the atoms are brought together to make it into ice then ice will also have 10 mL of water. Even if we melt ice then it will again change back to water which is 10 mL. Hence, a wrong statement.
Thus, we can conclude that statement 2 and 3 are correct statements about the Law of Conservation of Mass.
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Thank you so much for the explanation!
The volume after adding a crystal of gallium triiodide with a mass of 24.6590 g is 51.54 ml.
How are density and mass of substance related?Density is directly proportional to mass of substance .If volume remains constant and mass increases,the density must increase so that the increased mass is fitted into the same volume.If the volume were allowed to increase with increase in mass then there is no change in density.
In the problem given,density=4.15 g/cm³
initial volume=45.6 ml
mass of gallium triiodide=24.6590 g
The final volume after adding the crystal can be found out as follows,
Density=mass/(final volume-initial volume)
4.15=24.6590/(final volume-45.6)
4.15×final volume-189.24=24.6590
4.15×final volume=213.899
final volume=213.899/4.15
final volume=51.54 ml
Thus, the volume after adding crystal is 51.54 ml.
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someone please help
Answer:
Explanation:
ko
What is the statement of how data changes with a change in the variable
Helpppppppp
Data changes with a change in the variable means 'changes in one variable brings about changes in the other'
A change of variables is the basic technique in which it is used to simplify problems in which originals variables are replaced with function of other variables and that's why data is also change and sketch the region given by the problem in the xy plane and then write the equation of the curves that form the boundary
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A cube made of platinum (Pt) has an edge length of 3.00 cm.
The density of Pt is 21.45 g/cm3.
(a) Calculate the number of Pt atoms in the cube.
× 10 Pt atoms
(b)Atoms are spherical in shape. Therefore, the Pt atoms in the cube cannot fill all the available space. If only 74.0 percent of the space inside the cube is taken up by Pt atoms, calculate the radius in picometers of a Pt atom. The mass of a single Pt atom is 3.240 × 10−22 g. [The volume of a sphere of radius r is (4/3) πr3. The volume of a cube is l3, where l is the length of a side. Avogadro's number is 6.022 × 1023.]
pm
The radius in picometers of a Pt atom = 1.4 x 10⁻⁸ cm.
Given:
Length of edge = 1.0 cm
Density of platinum = 21.45 g/cm³
Mass of platinum = 3.240 x 10⁻²²g
Here, we must determine how many platinum atoms are contained within a cube.
We must first determine the quantity of platinum present in one gram in order to compute the number of platinum atoms.
= 1.0 cm³ x 21.45 g/cm³
= 21.45 g
Then the number of atom present is,
= 21.45 g/ (3.240 x 10⁻²²g Pt)
= 6.6 x 10²² Pt atoms.
Hence the number of atoms present in platinum is 6.6 x 10²² Pt atoms.
Begin with the single platinum atom and use the number of platinum atoms per 1.0 cm³ (the result from Part A) as a conversion factor to convert the number of platinum atoms into cubic centimeters of space.
In order to convert cubic centimeters of space into cubic centimeters of platinum atoms, multiply the percent of space occupied by a platinum atom by the original measurement.
[tex]v_{atom} = \frac{4}{3} \pi r^{3} _{atom}[/tex]
[tex]\frac{3V_{atom} }{4\pi } =r_{3} ^{atom}[/tex]
[tex]r_{atom} =\sqrt[3]{\frac{3V_{atom} }{4\pi} }[/tex]
[tex]=\sqrt[3]{\frac{3(1.12X10^{23} cm^{3} }{4\pi } }[/tex]
= 1.4 x 10⁻⁸ cm
So, The radius in picometers of a Pt atom = 1.4 x 10⁻⁸ cm.
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Jamel is to receive Cleocin 289 mg IV for 6.00 hr. The concentration of the solution is 5.00 mg/mL. What is the volume of the solution in milliliters that will need to be delivered?
The volume of the solution in milliliters that will need to be delivered when the concentration of the solution is 5.00 mg/mL is 55.4 mL
The given solution contains 5mg in 1 mL
1 mg of cleocin will be present in 1/5 ml of solution.
277 mg of cleocin IV will be present in 1/5x277
that is 55.4 mL of solution
So the volume of solution is 55.4 mL
The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value. The unitary method is used to write the value of a single unit from a given multiple.To learn more about unitary method visit:
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Explain the difference between the energy level changes in a blue vs red photon?
Answer:
Different colors of light are associated with different photon energies. Essentially, a photon is a packet of light. For example, a photon of red light would have less energy than a photon of blue light. This ties in with wavelengths because red has longer wavelengths than blue which results in less energy.
Explanation:
Red photons of light carry about 1.8 electron volts (eV) of energy, while each blue photon transmits about 3.1 eV. Visible light's neighbors on the EM spectrum are infrared radiation on the one side and ultraviolet radiation on the other.
How many kilograms of HF are needed to completely react with 7.01 kg of UO2?
Kilograms of HF are needed to completely react with 7.01 kg 0f UO₂ is 2.077 kg.
it is given that ,
mass of UO₂ = 7.01 kg = 7010 g
molar mass of UO₂ = 270.03 g/mol
molar mass of HF = 20.01 g/mol
mass of HF = ?
the balanced chemical equation is given as:
UO₂ + 4HF -------> UF₄ + 2H₂O
NOW,
no. of moles of UO₂ = mass / molar mass
= 7010 g /270.03 g/mol
= 25.96 moles
from equation it is clear that 1 mole of UO₂ react with 4 moles of HF
25.96 moles of UO₂ = 4 × 25.96 moles of HF
103.84 mol of HF
therefore,
mass of HF = no. of moles × molar mass
= 103.84 mol × 20.01 g/mol
= 2077.83 g
in kg , 2077,83 g = 2.077 kg
Thus, Kilograms of HF are needed to completely react with 7.01 kg 0f UO₂ is 2.077 kg.
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Brainliest 100pts
Part A:
In this lab we first mixed some liver with hydrogen peroxide in test tube #1 and observed foaming letting it completely react. Then we poured off the remaining liquid into a second test tube #2. Next we added fresh liver to test tube #2 and no reaction (foaming) occurred because;
A)The liquid in test tube #2 was Oxygen.
B)The liquid in test tube #2 was water.
C)The liquid in test tube #2 was Hydrogen peroxide.
D)The liquid in test tube #2 was Catalase.
Part B:
After pouring out the liquid from test tube#1 as described above, we then added fresh hydrogen peroxide back into test tube #1 with the original piece of liver still in it, and it began to foam again. The new foaming is evidence of which of the following claims?
Question 7 options:
After pouring out the liquid from test tube#1 as described above, we then added fresh hydrogen peroxide back into test tube #1 with the original piece of liver still in it, and it began to foam again. The new foaming is evidence of which of the following claims?
Question 7 options:
After pouring out the liquid from test tube#1 as described above, we then added fresh hydrogen peroxide back into test tube #1 with the original piece of liver still in it, and it began to foam again. The new foaming is evidence of which of the following claims?
A)The first chemical reaction produced more Catalase, and so when more hydrogen peroxide was introduced, the foaming began again.
B)The Catalase was still present in the liver tissue because the enzyme was not used up as a reactant in the chemical reaction.
C)After the liquid water was poured out earlier, the new hydrogen peroxide reacted with the oxygen in the air to start the foaming process again.
D)The Catalase was poured out of the test tube earlier leaving the hydrogen peroxide found in liver tissue to react again with oxygen.
In part A, The liquid in test tube #2 was Catalase. So option D is correct.
In part B, The new foaming is evidence of which of the claim that the Catalase was still present in the liver tissue because the enzyme was not used up as a reactant in the chemical reaction. So option B is correct.
What is catalase?Catalase can be described as an enzyme that will catalyze the reaction that breaks down hydrogen peroxide into oxygen and water.
Hydrogen peroxide is a strong compound that has the function of protecting microorganisms but due to its toxicity it must be transformed into less dangerous products, so catalase is vital as it breaks it down into oxygen and water.
We can confirm that the liquid in test tube #2 was catalase because it will break down hydrogen peroxide into water and oxygen so it will not react with the liver.
The new foaming is evidence of which of the claim that the Catalase was still present in the liver tissue because the enzyme was not used up as a reactant in the chemical reaction.
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Between thermal energy and heat
Thermal energy is heat it heats you up it give people heat it give away the heat it has until it is cold
Either you miswrote that or something else
An 8.25 L sample of oxygen is collected at 25°C and 1.022 atm pressure. What volume will the gas occupy .940 atm and -15°C?
Select one:
a.8.76 L
b.7.77 L
c.10.4 L
d.5.00 L
The volume a gas will occupy at a pressure of 0.940 atm and temperature of -15°C is 7.77 L (option B).
How to calculate volume?The volume of an ideal gas can be calculated using the combined gas law formula as follows:
P1V1/T1 = P2V2/T2
Where;
P1 = initial pressureP2 = final pressureT1 = initial temperatureV1 = initial volumeT2 = final temperatureV2 = final volumeAccording to this question, a 8.25 L sample of oxygen is collected at 25°C and 1.022 atm pressure. The volume the gas will occupy at 0.940 atm and -15°C is as follows:
1.022 × 8.25/298 = 0.940 × V2/258
0.0283 × 258 = 0.940V2
7.299 = 0.940V2
V2 = 7.299 ÷ 0.940
V2 = 7.77 L
Therefore, the volume a gas will occupy at a pressure of 0.940 atm and temperature of -15°C is 7.77 L.
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Hello
what is the difference between metals and non metals
...
Explanation:
METALS
metals tend to be hard, Metallic solids with high electric and thermal conductivity values and high melting and boiling points
NON METALS
non metals tend to be softer,often colourful elements that may be solids,liquids or gases
Answer:
metals are metals and nonmetals are not metals
hello
what is the difference between metallic and non metallic oxides
Metallic oxides and non-metallic oxides vary primarily in that metal oxides are basic chemicals while non-metal oxides are acidic.
A metal oxide is a chemical compound made up of a metal and one or more oxygen atoms. Here, oxygen is the anion in place of the metal cation since it has an oxidation number of -2. Alkali metals (group 1 elements), alkaline earth metals (group 2 elements), and transition metals combine to generate ionic oxides (certain elements of the d block). On the other hand, covalent oxides can yield metals with high oxidation states.Non-metal components combine to generate oxide compounds known as non-metal oxides. There are numerous non-metallic elements in P blocks. These elements produce a large variety of oxide compounds. Because oxygen atoms and oxide molecules share electrons to produce non-metal oxides, they are covalent compounds.Acids are produced when non-metal oxides and water combine. Non-metal oxides, for instance, have a very acidic H₂SO₄ solution when SO₃ is dissolved in water due to their acidic nature. Salts are produced when metal oxides interact with acids and bases. Oxyacids can be produced using non-metallic oxides. Hydronium ions are produced in aqueous solutions by oxyacids. SO₂, ClO₂, SO₃, and NO₂, among others, are examples of non-metallic oxides.
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Answer:
metallic oxides are when oxygen combines with metal and non metallic oxides are metals which are not combining with oxygen
A jeweler offers to sell you a ring he claims is pure palladium, which has a density of 12.02 g/mL. Before buying, you ask to test the jeweler’s claim. You find that the ring has a mass of 16.1 g, and when you add it to a graduated cylinder containing 10.2 mL of water, the volume rises to 12.1 mL. Is his claim that the ring is made of pure palladium true?
Taking into account the definition of density, the jeweler’s claim that the ring is made of pure palladium is not true.
Definition of densityDensity is defined as the property that allows us to measure the amount of mass in a certain volume of a substance.
The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
density= mass÷ volume
Density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.
How to know if the ring is made of pure palladiumIn this case, you know that:
Mass= 16.1 gTotal volume= 12.1 mLVolume of water= 10.2 mLVolume= Total volume - Volume of water= 12.1 mL - 10.2 mL= 1.9 mLReplacing in the definition of density:
density= 16.1 g÷ 1.9 mL
Solving:
density= 8.47 g/mL
A ring he claims is pure palladium, which has a density of 12.02 g/mL. You find that the density of the ring is 8.47 g/mL. Since the density is not the same, the jeweler’s claim that the ring is made of pure palladium is not true.
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Fatty acids are composed of a carboxyl group and
What are the four parts of a triglyceride?
The human body stores fats as
Label the following fatty acids as saturated or unsaturated.
When a hydrocarbon chain is bent, it is called
Fatty acids are composed of a carboxyl group and R group.
the four parts of a triglyceride
Glycerol (3 carbon backbone), Carboxyl Group (COOH; where the fatty acid attaches to the glycerol), Saturated Fatty Acid, and Unsaturated Fatty Acid
The human body stores fats as triglycerides, hand in muscles or fat cells.
as per diagram , Flat=saturated and curvy=unsaturated
When a hydrocarbon chain is bent, it is called unsaturated hydrocarbon
Carboxylic acids are soluble in water because the C=O and O-H bonds are polar thus allowing them to form hydrogen bondsCarboxylic acids with up to 4 carbons in a chain are soluble in water as there aren't many non polar carbon carbon bondsTo know more about Carboxylic acids visit :
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Nitrogen dioxide (NO₂) gas and liquid water (H₂O) react to form aqueous nitric acid (HNO3) and nitrogen monoxide (NO)gas. Suppose you have 2.0 mol of
NO₂ and 9.0 mol of H₂O in a reactor.
What would be the limiting reactant? Enter its chemical formula below.
The limiting reactant is NO2.
A reactant that is consumed first and limits the amount of product obtained is a limiting reactant. To identify the limiting reactants, calculate the number of moles of each reactant present and compare this ratio to the molar ratio of the reactants in the balanced formula.
The limiting reagent is a low-molarity reagent. When determining the limiting reagent, first balance the chemical formula and convert all relevant quantities to moles. Stoichiometry is then used to determine the amount of product that can be produced from each reactant. A limiting reagent is a reactant that is completely consumed in a reaction, thus determining when the reaction stops.
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How many (NH4)2SO4 molecules are there in 1.723 moles of (NH4)2SO4?
Answer:
1.038 x 10²⁴ molecules
Explanation:
To find the amount of molecules, you need to multiply the mole value by Avogadro's number. Avogadro's number is a ratio which represents the amount of molecules per every 1 mole. The ratio should be arranged in a way that allows for the cancellation of units (moles should be in the denominator to cancel the units of the given value). The final answer should have 4 sig figs to like the given value (1.723 = 4 sig figs).
Avogadro's Number:
6.022 x 10²³ molecules = 1 mole
1.723 moles (NH₄)₂SO₄ 6.022 x 10²³ molecules
------------------------------------- x -------------------------------------- =
1 mole
= 1.038 x 10²⁴ molecules (NH₄)₂SO₄
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