The mass of calcium hydroxide produced is 42.2g.
A white powder without any smell is calcium hydroxide. It is applied in commercial contexts such sewage treatment, paper manufacturing, building, and food processing. It can be used in dentistry and medicine. In root canal fillings, for instance, calcium hydroxide is frequently used. Slaked lime, often known as calcium hydroxide, is an inorganic substance having the chemical formula Ca(OH)2.
It is created when quicklime is combined or slaked with water and is a colorless crystal or white powder. It goes by a variety of names, including pickled lime, hydrated lime, caustic lime, builders' lime, and slaked lime. Calcium hydroxide, often known as E number E526, is a chemical that is employed in a variety of processes, including the production of food. A saturated solution of calcium hydroxide is known as limewater, often known as milk of lime.
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Be sure to answer all parts.
Give the name and formula of the compound formed from the elements 38L and 17M.
Answer:
Explanation:
55647 for b
Convert 2.44 x 1024 H₂O molecules into moles.
The number of moles 2.44 x 10²⁴ H₂O molecules will be having is 4.05.
Converting between molecules and moles is done by either multiplying by or dividing by Avogadro's number. To go from molecules to moles, divide the number of molecules by 6.02 x 10²³.
Avogadro's number, which is equal to 6.022 × 10²³, is the number of units in one mole of any material (defined as its molecular weight in grams). Depending on the substance and the nature of the reaction, the units could be electrons, atoms, ions, or molecules.
Thus,
No. of molecules = No. of moles × Avogadro no.
from the question we know,
No. of molecules = 2.44 × 10 ²⁴
Avogadro no. = 6.02 × 10²³
i.e. 2.44 × 10²⁴ = No. of moles × 6.02 × 10²³
No. of moles = 2.44 × 10 ²⁴
6.02 × 10²³
No. of moles = 4.05
The number of moles 2.44 x 10²⁴ H₂O molecules will be having is 4.05.
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1.5 miles to centimeters
hi
1 mile is 1 609 meters. (rounded).
As there is 100 centimeters in a meter, then
1 mile is 160 900 centimeter.
Then 1.5 miles , is 1 mile + one half so :
160 900 + 160 900 /2 = 160 900 + 80 450
= 241 350
1.5 mile is 241 350 centimeters.
please note that the value of a mile was rounded.
Which of the following is the
correct way to express the
number below in standard form?
3.7 x 10-4
A. 0.000037
B. 0.00037
C. 37000
D. 370000
[tex]\implies[/tex] The correct answer is (B) 0.00037
Step-by-step explanation:[tex]\bf{ \underline{Step \: 1)} :3.7 × 10^{-4 }we \: can \: write \: as \:37 × 10^{-5}}[/tex]
[tex]\bf{ \underline{Step \: 2)} :37 × 10^{-5 } \: we \: can \: write \: as \: 37 × \frac{1}{10^5}}[/tex]
[tex]\bf{ \underline{Step \: 3)} :37 × \frac{1}{10^5}\: we \: can \: write \: as \: (37 × \frac{1}{(10)(10)(10)(10)(10)}})[/tex]
[tex]\bf{ \underline{Step \: 4)} :37 × \frac{1}{(10)(10)(10)(10)(10)} we \: can \: write \: as \: ( 37 × \frac{1}{100000}})[/tex]
[tex]\bf{ \underline{Step \: 5)} :37 × \frac{1}{100000} \: we \: can \: write \: as \: \frac{37}{100000}}[/tex]
[tex]\bf{ \underline{Step \: 6)} :\frac{37}{100000} \: we \: can \: write \: as \: 0.000037}[/tex]
The top chemical reaction shows the reaction between sodium and chlorine to produce table sale (sodium chloride). Select ALL of the reactants shown in the chemical reaction:
The kind of chemical reaction that results in the formation of sodium chloride is a neutralization reaction.
What is a neutralization reaction?
Bases react to produce water and salt, which requires the interaction of H+ and OH- ions. A pH of 7 results from the neutralization of a potent acid and a potent base. A strong base neutralizing a weak acid will provide a pH result that is more than 7, while the neutralization of a strong acid and weak base will produce a pH result that is less than 7.
A solution is neutralized when equal amounts of acid and base combine to create salts. One mole of protons (H+) is equivalent to one mole of the base, and one mole of acid is equivalent to one mole of protons (H+) (OH-). N parts of acid will always neutralize N parts of the base because salts are created by neutralization reactions with comparable weight concentrations of acids and bases.
Therefore, the kind of chemical reaction that results in the formation of sodium chloride is a neutralization reaction.
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why does the heating curve for ice/water/steam have areas which are flat?
Answer:
the areas which are flat in the heating curve is when matter is condensing
Which is the best argument for why CO2 represents a covalent bond?
A:The difference in electronegativity of the two elements is greater than 1.7.
B:The difference in electronegativity of the two elements is less than 1.7.
C:The difference in electronegativity of the two elements is greater than 1.7 but less than 3.0.
D:The difference in electronegativity of the two elements is zero.
The difference in electronegativity of the two elements is less than 1.7 represents the covalent bond.
What is the covalent bond?
If the electronegative difference is greater than 1.7, the bond's nature is ionic; if it is less than 1.7, the bond's nature is covalent.
The sharing of electrons between atoms is known as covalent bonding. This kind of bonding happens when two atoms of the same or closely related elements in the periodic table come together.
Covalent bonding is seen in between nonmetals and metals, this bonding typically happens between nonmetals. Covalent bonds are most likely to form when two atoms have comparable electronegativities, or the same affinity for electrons.
Therefore, The difference in electronegativity of the two elements is less than 1.7 represents the covalent bond.
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According to today's Lesson Module Reading, which of the following are aqueous suspensions? Milk Soil Paint Jelly beans
Answer:
i think paint
Explanation:
Does air consists of elements only
Answer:
yes
Explanation:
it is a mixture of gases.
there are some other main gases like,
nitrogen with approximately 78%
and oxygen with 21%
and many other gases.
1.00 x10^5 grams of oxygen molecules and 1.00 x10^5 grams of methane molecules are rearranged into model water and carbon dioxide molecules. following CH4 +2O2 -> CO2 + 2H2O, what will the masses of water and carbon dioxide be?
Masses of water and carbon dioxide be 54 g and 66 g respectively.
Mass is a measure of the amount of matter that an object contains
Here given data is 1.00 x10⁵ grams of oxygen and 1.00 x10⁵ grams of methane and the reaction is
CH₄ +2O₂ → CO₂ + 2H₂O
Then (12+4)= CH₄ , 2×(16×2)=2O₂ , 12+(16×2)=CO₂ , 2×(16+2)=2H₂O
CH₄ = 16 g, 2O₂ = 64 g, CO₂ = 44 g, 2H₂O = 36 g
Then, we have to find masses of water and carbon dioxide = ?
24g of CH₄=24/16×44 = 66 g of CO₂
16 g of CH₄ will produce 36 g of water
Then, 24 g of CH₄ = 24/16×36 = 54 g of water
Mass of water is 54 g and mass of carbon dioxide is 66 g
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The first has an abundance of 15.8% with a mass of 71.68amu. The second isotope has a mass of 73.47amu. What is the average atomic mass?
The average atomic mass of the two isotopes is 7346.717 atomic mass units.
How is average atomic mass of isotopes calculated?Average atomic mass of an element is the sum of masses of it's isotopes multiplied by it's natural abundance. The percent of natural abundance of isotope is converted in to decimal form by dividing it by hundred.
It is a fraction representing natural abundance of the isotope .It is found out because there is no mass set for an element.
To calculate average atomic mass, the given data is substituted in the formula,
average atomic mass=abundance×atomic mass of isotope 1 +abundance×atomic mass of isotope 2
=(0.158×71.68)+(99.842×73.47)
=11.3254+7335.39
=7346.71 atomic mass units
Thus, the average atomic mass is 7346.71 atomic mass units.
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The enthalpy of vaporization for methanol is 35.2 kJ/mol. Methanol has a vapor pressure of 1 atm at 64.7 oC. Using the Clausius-Clapeyron equation, what is the vapor pressure for methanol at 34.1 oC? Give your answer in atmospheres, to the third decimal point.
The vapor pressure is obtained as 3.7 atm.
What is the Clausius-Clapeyron equation?The Clausius-Clapeyron equation is the equation that we could use to obtain the vapor pressure of a solution at any temperature. Of course we would always have two different temperatures to work with.
Hence;
ln(P1/P2) = ΔHvap/R (1/T2 - 1/T1)
P1 = initial pressure
P2 = final pressure
ΔHvap = enthalpy of vaporization
T2 = final temperature
T1 = initial temperature
ln(1/P2) = 35.2 * 10^3/8.314 (1/338 - 1/307)
ln(1/P2) = 4234(0.00295 - 0.00326)
ln(1/P2) = -1.31
1/P2 = e^-1.31
P2 = 1/e^-1.31
P2 = 3.7 atm
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Help me out
Question 1: Do heavy metals like lead and arsenic cause damage to human DNA?
Question 2: Should industries releasing heavy metals into land and water ecosystems be penalized?
Heavy metals such lead and arsenic does cause damage to human DNA.
Industries which release heavy metals into land and water ecosystems should be penalized.
However, the exposure of these heavy metals damage the body due to the by inhibiting proteins in DNA pathways during repairs.
What are the effects of exposure on heavy metals?The side or adverse effects of exposure of heavy metals have great risk to the well being of humans. Among these effects are as follows:
It causes certain disorders in the nervous system of humansIt affects the respiratory systemIt affects the circulatory systemSo therefore, heavy metals such lead and arsenic does cause damage to human DNA.
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15 POINTS!!!! NEED ASAP!!!!
There is a lot of confusion in the world over the word "theory" in the world today, and most people assume that when someone says something is a "scientific theory" it is just a guess. However, we know that a scientific theory is a lot more than just a guess. For this discussion, write your opinion of how we could change the misconception that all scientific theories are just guesses, and make sure to use at least 4 sentences.
A scientific theory is backed up by pieces of evidence hence it is not a mere guess.
What is a scientific theory?A scientific theory is a well crafted explanation of an observed phenomenon. A scientific theory is different from a mere guess in the sense that the scientific theory must have some basis that support it.
A mere guess does not have any kind of data that supports it. Let us take the theory of evolution as an example. Countless discoveries of fossil evidences have shed some light on the probability of the theory. In this case, we can not consider it a mere guess since there is some kind of evidence that supports the claims of the theory.
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8.00 g of C,H, has how many H atoms?
The correct answer is 3.68 × 10^23 atoms.
The Avogadro's number is the number of constituent particles—typically molecules, atoms, or ions—that make up a mole of a substance. The relationship between the molar mass of a substance and the mass of a sample is determined by its proportionality. In the International System of Units, it has the symbol NA or L and a value of 6.022140857 × 10^23 mol^-1 (SI).
Weight of C6H6 = 8 gram
C6H6 Molar mass is = 78 gram/mole
Mole of C6H6 = 8 / 78 mole
= 0.102 mole C6H6
Mole of C6H6 = No. of C6H6 molecule / Avagadro number
0.102 × 6.03 × 10^23 = No of C6H6 molecule
Here 6 atoms in C6H6 molecule so
No. of H atoms in C6H6 = 0.102 × 6.03 × 10^23
= 3.68 × 10^23 atoms
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You know that silver has a density of 10.5 g/cm3. What mass of silver will raise the level of the
water in the graduated cylinder 1.50 mL?
The mass of the silver that will raise the water by 1.5 mL is 15.75 g
What is density?The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as
Density = mass / volume
With the above formula, we can obtain the mass of the silver. Details below
How to determine the mass of the silverDensity of silver = 10.5 g/cm³Volume of water raised = 1.5 mLVolume of silver = Volume of water raised = 1.5 mL = 1.5 cm³Mass of silver =?Density = mass / volume
Cross multiply
Mass = Density × Volume
Mass of silver = 10.5 × 1.5
Mass of silver = 15.75 g
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what are the two sources of energy for earths geological systems?
Answer:
radioactive decay or solar radiation
Explanation:
Which velocity vs. time graph corresponds to the data represented by the position vs. time graph?
The velocity vs. time graph that corresponds to the info shown by the position vs. time graph is that the graph that has continuous acceleration (straight line).
The above statement of continuous acceleration means a relentless acceleration. A straight lines is just known to be a continuing acceleration that's said to be unchanging. Note that when there's a curved lines in a very graph, it implies that there's a non-constant acceleration. Therefore an object that's undergoing constant acceleration is one that may be seen in an exceedingly line. So therefore, the speed vs. time graph is one that matches with the information represented by the continual acceleration (straight line) on the graph.
Constant acceleration means that velocity changes at a constant rate with respect to time. If acceleration is made zero, velocity does not change. If acceleration is positive, the magnitude of velocity increases correspondingly.
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Answer:
your answer is c your welcome
Explanation:
A 25.00 mL sample of oxalic acid, H₂C2O4, requires 31.44 mL of 0.3164 M NaOH for titration to the
equivalence point. What is the concentration of the oxalic acid?
H₂C₂O4(aq) + 2 NaOH(aq) →→→ Na₂C₂O4(aq) + 2 H₂O(1)
-
4.973 M
0.1989 M
9.946*10^-2 M
0.3978 M
0.7957 M
Answer: 9.946*10^-2 M
Explanation: if u multply
Mateo was the first responder at a crime scene. He ensured that the scene was safe. Other officers arrived. What should Mateo and the officers do next?
A.
They must secure the crime scene.
B.
Nothing; they need to wait for others to arrive.
C.
They should take photos from all angles.
D.
They are required to collect evidence.
Mateo and the officers should secure the crime scene.
What are the stages in crime investigation? Approach the crime scene and seal it-The extent to which crime scene is to be protected is determined. Get information regarding crime surroundings-Valuable information regarding the crime scene's surroundings is obtained.Collect physical evidences-Physical evidences on the spot of crime scene are collected.Prepare a narration mentioning the crime scene's description- A narration is prepared regarding crime scene's location and surroundings.Prepare a sketch of the crime scene-A sketch of the crime scene is prepared keeping in mind the detailed view of the surroundings.Conduct a detailed research-A detailed research is carried out by the detectives regarding the crime scene.Evaluate physical evidences-The physical evidences which are collected are evaluated to obtain information which helps in getting the criminal arrested.Conduct final survey- A final survey is carried out to make sure that no clues which are in regard to the crime are left unattended.Release crime scene- The crime scene is released by removing all the boundaries which were set to protect the crime scene.
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A student carried out the reaction below starting with 1.993 g of unknown (X₂CO3), and
found that the mass loss due to CO₂ was 0.593 g.
X₂CO3(s) + 2 HCl(aq) ® 2 XCl(aq) + H₂O() + CO₂(g)
How many moles of CO₂ were produced?
The reactants are CH4 and O2 and the products are CO2 and H2O. The coefficients for both CH4 and CO2 are 1, meaning that for each mole of CH4 consumed, 1 mole of CO2 is produced.
Solution:
X₂ (03 (s) + 24U (ag) → 2x4(aq) + [tex]H_{2}ol[/tex] + [tex]o_{2}(g)[/tex]
Moles of [tex]o_{2}[/tex] = Mass of CO₂ produced 0.5938/Molar mass of co₂
= 0.593g/44.01gmol·
= [tex]n_{co2}[/tex] = 1.35*[tex]10^{-2} mol[/tex].
You can search for unclaimed property online through the Unclaimed Property Department database. Find out if the property matches your information. Once you've found a property you own, select the listing and click Start Claim. If you have lost a large amount of money, we recommend calling the police.
Do a thorough search first, but if you still can't find the money, call the police. Check your eligibility by visiting the FSCA website, which has a built-in search engine. Visit Liberty's website and add your or your relatives' details for quick and easy verification.
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12. What are two things shown by a chemical formula?
The two things shown by a chemical formula are: it tells the number of atoms of each element in a compound and symbols of the atoms of the elements present in the compound.
What is a chemical formula?A chemical formula is used by scientists to represent the information concerning the elements and the types of elements found in a chemical compound.
A chemical compound is a substance that is made up of two or more elements which are chemically combined together.
There are various type of chemical formula which include the following:
Molecular chemical formula: This type of formula shows the number of atoms for each element in the compound.Empirical chemical formula: This type of formula shows the simplest ratio of atoms of the elements in the compound.Structural chemical formula; This type of formula shows the arrangement and bonds of the atoms of the elements of a chemical compound.Learn more about chemical formula here:
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What quantity in moles of sodium atoms do you have if you have 3.80 × 10²³ atoms of sodium. (The mass of one mole of sodium is 22.99 g.)
The quantity in moles of sodium atoms is 0.631 moles of sodium if you have 3.80 × 10²³ moles of sodium.
What is moles?Moles is defined as a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules and some other specified particles.
It is a very important unit of measurement which chemist use. It can also be defined as the amount of substance that contain exactly 6.022 x 10²³ elementary entities in a given substances.
1 moles = 6.022 x 10²³ atoms
3.80 × 10²³ atoms of sodium will have
3.80 × 10²³ x 1 mole of Na / 6.022 x 10²³ atoms
= 0.631 moles of Na
Thus, quantity in moles of sodium atoms is 0.631 moles of sodium if you have 3.80 × 10²³ moles of sodium.
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The Haber process is used to synthesize ammonia (NH₂) on a large scale by the reaction of nitrogen gas with hydrogen gas as follows:
N2 (a) + 3 H2 (al 2 NH3 (al
Consider a reaction between a 11.67 L flask containing nitrogen gas and a 12.3 L flask of hydrogen gas. Both gases have a temperature of 288 K and the pressures inside both
flasks is 0.87 bar.
What mass of ammonia (in g) would you expect to be produced at temperature 288 K and a pressure of 0.87 bar?
The mass of ammonia gas produced by the given volume of hydrogen and nitrogen is 5.066 g.
What mass of ammonia g would be produced at temperature 288 K and a pressure of 0.87 bar?The mass of ammonia in grams would be produced at temperature 288 K and a pressure of 0.87 bar is determined using the ideal gas equation.
The ideal gas equation is as follows;
PV = nRT
where;
P is pressure
V is volume
n is number of moles
R is molar gas constant = 8.314 × 10⁻² L.bar.K⁻¹.mol⁻¹
T is temperature in kelvin.
number = mass/molar mass
Considering the data provided, the moles of each gas present in their containers are as follows;
n = PV/RT
moles of nitrogen gas:
P = 0.87 bar, V = 11.67, R = 8.314 × 10⁻² L.bar.K⁻¹.mol⁻¹, T = 288 K
n = 0.87 * 11.67/8.314 × 10⁻² * 288
n = 0.424 moles
moles of hydrogen gas:
P = 0.87 bar, V = 12.3, R = 8.314 × 10⁻² L.bar.K⁻¹.mol⁻¹, T = 288 K
n = 0.87 * 12.3/8.314 × 10⁻² * 288
n = 0.447 moles
The equation of the reaction is given below:
N₂ (g) + 3 H₂(g) → 2 NH₃ (g)
From the equation, mole ratio of nitrogen to hydrogen is 1 : 3, therefore, hydrogen is the limiting reactant.
Moles of ammonia gas produced = 0.447 * 2/3 moles
Moles of ammonia gas produced = 0.298 moles
molar mass of ammonia gas = 17.0 g/mol
Mass of ammonia gas produced = 0.298 moles * 17.0 g/mol
Mass of ammonia gas produced = 5.066 g
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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?
The density of the solid block is 3.79 * 10⁻³ g/cm³.
What is the density of substance?The density of a substance is defined as the ratio of mass and volume of a substance.
Density = mass/volumeDensity measure how close together the particles of a given mass of a substance is. Substances with high density have greater masses compared to the volume of those substances whereas substances with low densities have greater volume compared to their masses.
The volume of the solid block = 78 * 55 * 35 = 150150 cm³
mass of solid block = 569 g
Density of the solid block = 569 g/150150 cm³
Density of the solid block = 3.79 * 10⁻³ g/cm³
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is the forward reaction in the [CoCl4]2- ion / [Co(H2O)6]2 ion equilibrium exothermic or endothermic? Briefly explain how the student's observation supports your answer.
The forward reaction in the tetra-chloro cobalt(II) ion and hexa-aquo cobalt ion equilibrium is a exothermic process.
How is the given forward reaction inferred exothermic?The reaction is exothermic in the forward reaction because Co(H₂O)₆[tex]^+2[/tex] is more stable than CoCl₄[tex]^2-[/tex] as the bond are stronger in aquo complex of cobalt than in chlorate complex.
It is expected that if temperature is increased, reaction will occur in reverse direction to favoring endothermic reaction ,and if temperature is decreased exothermic reaction is favored.
In exothermic reaction,the color of complex is pink due to an increase in the number of water molecules while in endothermic reaction there is an increase in the concentration of chloride ions which leads to blue color solution.
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A 15.8 g sample of chromium (III) chloride (CrCl3) contains 10.6 g of chlorine. What mass of chromium is contained within a sample of chromium (III) chloride with mass of 83.1 g?
Mass of chromium contained within a sample of chromium (III) chloride with mass of 83.1g is 27.25 g
Any of the chemical compounds having the formula CrCl3 . x H2O, where x is one of 0, 5, or 6, is referred to as chromium(III) chloride. Violet solid represents the anhydrous CrCl3 chemical.One approach to show the concentration of an element in a compound or component in a combination is as a mass percentage. The mass percentage is computed by dividing the total mass of the combination by the mass of each component and multiplying the result by 100%.Given,
chlorine present in 15.8 g of sample of chromium (III) chloride is 10.6g
we have to find out mass of chromium present in 83.1 g of chromium (III) chloride.
First step is to find out mass percentage of chlorine and chromium atom in CrCl3.
No. of atoms of chromium in chromium (III) chloride = 1
molar mass of chromium = 52 g/mol
Total mass of element = 52 × 1 = 52
No. of atoms of chloride in chromium (III) chloride = 3
molar mass of chloride = 35.5g/mol
Total mass of element = 35.5 × 3 = 106.5
Total mass of chromium (III) chloride = 158.5 g/mol
mass percentage of chromium = 32.8 %
mass percentage of chloride = 67.1 %
So, the mass of chromium present in chromium (III) chloride = (32.8 / 100) × 83.1
= 27.25 g
Therefore mass of chromium in 83.1g of chromium (III) chloride is 27.25 g
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what effect does using plant food(Miracle Grow) have on a plant
The effect of using plant food(Miracle grow) is providing nutrients for plants, increasing longevity, and fostering plant growth.
Miracle grow contains plant nutrients and micronutrients. Plant nutrients are nitrogen, phosphorus, and potassium, while micronutrients are boron, calcium, and magnesium. These nutrients will help the plant to plant more robustly, faster, and healthier. Also, it will produce larger/more numerous flowers and fruits/vegetables will produce larger/more numerous fruit.Miracle-Gro is a chemical fertilizer that uses chemical versions of nutrients necessary for longevity and long-duration .The function of Miracle-Gro is to bolster the growth of the plants so that they are bigger and create more blooms where applicable.Miracle-Gro is a chemical fertilizer that uses chemical versions of nutrients necessary for longevity and long-duration and sustenance.To learn more about miracle grow visit:
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Please help
What is the energy (E) of a photon whose frequency is 5.77 × 10¹ s ¹2
Answer:
3.83*10⁻²¹ [J].
Explanation:
1) formula:
E=hν, where ν=5.77*10¹²; h=6.63*10⁻³⁴;
2) according to the formula above:
E=577*10¹⁰*663*10⁻³⁶=382551*10⁻²⁶ [J]≈3.83*10⁻²¹[J].
An ionic compound forms when lithium (Z = 3) reacts with oxygen (Z = 8). If a sample of the compound contains 5.52 × 1023 lithium ions, how many oxide ions does it contain?
Ionic bonding continued. In the reaction between lithium and oxygen, lithium donates its valence electrons to oxygen atoms.
Li ( Z=3 ) , E.C. 2,1
Lithium will lose one electron to form unipositive ions.
O ( Z=8 ), E. C. 2, 6
Oxygen will gain 2 electrons to form a negative ion
So the formula of Lithium oxide will be Li2O
Hence the number of oxide ions will be half the number of Lithium ions or 1.07 × 10^22 / 2 Or 0.585 × 10^22 ions.
As you can see in the animation to the right, two lithium atoms react with one of her oxygen atoms. Each lithium atom donates an electron to an oxygen atom. In ionic compounds, the total number of cation charges must equal the total number of anion charges. In other words, the connection must be neutral. This is an example of a binary ionic compound consisting of two elements, a cation, and an anion. Lithium, a metal, has a positive charge, and fluoride, a non-metal, has a negative charge, so these two ions are held together by an ionic bond.
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