In the chemical reaction seen here:
Which of the following would be considered "Reactants"?
2 Ca,SiO, +7 H,O3 CaO +2510, 4H,0+3 Ca(OH),
volcanic_ash_reaction
O Calcium Silicon pentaoxide and water
O-173.6 KJ
O Silicon dioxide hydrate and Calcium silicon dioxide
Ocalcium Oxide and water
When atoms establish or break chemical bonds, chemical processes take place. Reactants are the chemicals that begin a chemical reaction, while products are the compounds that are created as a result of the reaction.
When a volcano erupts, glass, rock, and mineral particles are mixed together to form volcanic ash. Less than 2 millimetres in diameter, the particles are very tiny. They have a low density since they are frequently pitted and have numerous holes. In hydrated Portland cement, CSH is the primary factor in the development of strength, while calcium hydroxide is another hydration agent.
Silica granules generate non-explosive dusts when they are suspended in the atmosphere. To create silicates, silica can interact with other metallic elements and oxides. A silicon atom is covalently joined to two oxygen atoms to form silicon dioxide, a kind of silicon oxide composed of linear triatomic molecules.
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I’m giving brainlest pls help meeee
Answer: Bromine
Explanation:
An experiment
requires 15.0 g of cyclohexane, whose density at 25 °C is
0.7781 g/mL. What volume of cyclohexane should be used?
The correct answer is 19.28 L .
Simply put, the volume is calculated using the mathematical relationship between the entire mass that is available and the chemical substance's density. The following equation illustrates how to calculate a chemical substance's volume:
Volume = Total mass / Density
The density is calculated using the following formula: ρ= m/V, where m is the object's mass and V is its volume.
The temperature is T = 25∘C
the mass of the cyclohexane is m_c = 15 g ,
and the cyclohexane's density is ρ = 0.7781 g/L
The volume of cyclohexane is computed using the relation shown below:
m = ρ × V
V = m / ρ
V = 15g/0.7781
V = 19.28 L
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Calculate the mass of acetone, C3H6O, that vaporizes as a result of absorbing 500 KJ of energy. The molar enthalpy of vaporization of acetone is 31.3 Kj/mol
The organic molecule acetone has the chemical formula (CH3)2CO. The smallest and most basic ketone. It is a colorless, incredibly combustible liquid with a distinctively strong smell. Because it is miscible with water, acetone is used as a significant organic solvent in industry, the household, and laboratories.
Calculate the mass of acetone, C3H6O, that vaporizes as a result of absorbing 500 KJ of energy.
Knowing that;
acetone weighs 31.5 g.
Acetone's molar mass is 58.08 g/mol.
Acetone has a heat of vaporization of 31.3 kJ/mol.
Count of moles = mass / molar mass
Acetone molecular weight = 31.5 / 580.8
Acetone has a molecular weight of 0.5424 moles.
By dividing the number of moles of acetone by the heat of vaporization of acetone, one may calculate the amount of heat necessary to evaporate 31.5 g of acetone;
Hence;
31.3 g of acetone must be heated to vaporization temperature of 31.0 kJ/mol, or 0.5424 mole.
16.8144 kJ of heat are needed to evaporate 31.3 g of acetone.
≅ 16.81 kJ
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What is Atomic radius
Answer:
Atomic Radius is confusing if you try to understand it with one atom alone.
I'll make it easy for you
so, imagine there are two identical carbon atoms, bonded together, now the distance between the nucleas of one carbon atom and the nucleas of the other carbon atom is Atomic Radius
it increases down the group in a periodic table
hope i helped you :)
28. The volume of a gas sample is 22 L at STP. The density of the gas is 1.35 g/L. What is the mass
of the gas sample, expressed to the correct number of significant figures?
1) 30. g
3) 16.7 g
2) 30.0 g
4) 2.56 g
Answer:
30
Explanation:
Density = mass over volume
1.35 = m ÷ 22
isolate m
1.35 × 22 = 29.7
2 sig figs
so,
30 grams
The mass of the given gas sample at STP is 28 grams.
What is the relation between the mass and density of a solid body?
The relation between the mass and density of any substance is given by -
M = ρV
Where -
M - mass of body
ρ - density of body
V - volume of body
Given is volume of a gas sample is 22 L at STP. The density of the gas is 1.35 g/L.
We can write -
Volume of gas = [V] = 22 L
density of gas = [D] = 1.3 g/L
Therefore, the mass of the gas will be -
M = ρV
M = 1.3 x 22
M = 28.6 g
Therefore, the mass of the given gas sample at STP is 28 grams.
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The elements magnesium (Mg) and calcium (Ca) play vital roles in maintaining human health, including processes like bone building. The majority of Americans have lower levels of magnesium than health experts recommend. Do some research in order to propose a possible hypothesis that could explain this phenomenon.
Hint: Consider diet and lifestyle when conducting your research.
Furthering the Discussion
If you need more material to continue the conversation, use these questions as a guide.
What are some possible health issues a person with a magnesium deficiency could experience?
What are some ways that people can be sure to take in enough magnesium and calcium to ensure their good health?
The possible health issues a person with a magnesium deficiency could experience is osteoporosis and high blood pressure.
What is Magnesium?this is referred to as chemical element with atomic number of 12 and the sign is Mg.It is very important in the body as it helps in the proper functioning of the musculoskeletal system and also aids energy production in body cells.
A deficiency in this will result in osteoporosis and ways that people can be sure to take in enough magnesium and calcium to ensure their good health is by eating food which are rich in them such as vegetables, fruits etc.
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O Why is it called a "mass" number?
Calculate the maximum wavelength of light capable of dissociating the br–br bond in one molecule of bromine if the bond energy, or bond dissociation energy, is 194 kj/mol.
According to bond energy, the maximum wavelength of light is 614 nanometers.
We need to know about bond energy to solve this problem. Bond energy is the energy needed to bond other atoms in the molecule. To determine the energy in one molecule of chlorine monofluoride, we can use this formula:
E = BE / Na
where E is the energy of photon, BE is bond energy and Na is Avogadro's number (6.02 x 10²³ atoms/mol)
Now, we can calculate the shortest wavelength by using Einstein's equation for photon energy:
E = h . c / λ
where h is Planck constant (6.6 x 10¯³⁴ J.s), c is the speed of light (3 x 10⁸ m/s) and λ is the wavelength.
From the question above, we know that
BE = 194 kJ/mol = 194 x 10³ J/mol
By substituting the given parameters, we can calculate the maximum wavelength
E = BE / Na
h . c / λ = 194 x 10³ / 6.02 x 10²³
6.6 x 10¯³⁴ . 3 x 10⁸ / λ = 194 x 10³ / 6.02 x 10²³
λ = 6.14 x 10¯⁷ m
λ = 614 nm
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There are 2 isotopes of the fictional element Nz: Isotope 51 and Isotope 55. The average atomic mass of the fictional element Nz is 52.21 amu.
What is the percent abundance of Isotope 51?
What is the percent abundance of Isotope 55?
If we had 63 atoms of element Nz (and remember you can't have just half of an atom):
How many of those atoms would likely be Isotope 51?
How many of those atoms would likely be Isotope 55?
The percentage abundance of Nz- 51 and Nz- 55 are 69.8 % and 30.2% respectively.
What is the percentage abundance of the isotopes?We know that an isotope of an element has to do with atoms that have the same atomic number but the atomic masses of the atoms does differ. In this case, we have two isotopes Nz - 51 and Nz -55. We have the relative atomic mass of the elements as 52.21 amu.
Let the percentage abundance of Nz - 51 be x and the percentage abundance of Nz -55 be 1 - x.
52.21 = 51x + 55(1 - x)
52.21 = 51x + 55 - 55x
52.21 - 55 = 51x - 55x
-2.79 = -4x
x = 0.698
Thus;
Percentage abundance of Nz - 51 = 0.698 or 69.8 %
Percentage abundance of Nz - 55 = 1 - 0.698 or 30.2 %
If I have 63 atoms
Number with isotope Nz - 51 = 0.698 * 63 = 44 atoms
Number with isotope Nz - 55 = 0.302 * 63 = 19 atoms
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How many grams are in 1.70 moles of Ca(NO3)2?
The number of grams in 1.70 moles of Ca(NO₃)₂ is 384.2 grams
How to determine the mass of Ca(NO₃)₂The mole of a substance is related to it's mass and molar mass according to the following equation:
Mole = mass / molar mass
With the above formula, we can determine the mass of Ca(NO₃)₂ as illustrated below:
Mole of Ca(NO₃)₂ = 1.70 molesMolar mass of Ca(NO₃)₂ = 40 + 3[14 + (16 × 3)] = 40 + 3[14 + 48] = 40 + 3(62) = 40 + 186 = 226 g/mol Mass of Ca(NO₃)₂ = ?Mole = mass / molar mass
1.70 = Mass of Ca(NO₃)₂ / 226
Cross multiply
Mass of Ca(NO₃)₂ = 1.70 × 226
Mass of Ca(NO₃)₂ = 384.2 grams
Thus, the mass of 1.70 moles of Ca(NO₃)₂ is 384.2 grams
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an element has four naturally occurring isotopes with the masses and natural abundances given here. isotope mass (amu) abundance (%) 1 203.97304 1.390 2 205.97447 24.11 3 206.97590 22.09 4 207.97665 52.41
The average atomic mass of istopes is 207.217126723 amu
Isotopes are members of family of an electron having same no. of protons but different no. of neutrons.
For the average atomic mass we have to multiply the masses to the abundance % of isotopes and then add all the mass.
1) 2.203.97304 amu has an abundance % of 1.390
= 203.97304 × 1.390
= 283.5225256/100 amu
2) 205.97447 amu has an abundance % of 24.11
= 205.97447 × 24.11
= 4966.0444717 /100 amu
3) 206.97590 amu has an abundance of % 22.09
= 206.97590 ×22.09
= 4572.097631 /100 amu
4) 207.9765 amu has an abundance of % 52.41
= 207.9765 × 52.41
= 10900.048365 /100 amu
now, the average atomic mass is
= (283.5225256 + 4966.0444717 + 4572.09731+10900.048365)/100 amu
= 207.217126723 amu
Therefore, The average atomic mass of isotopes is 207.217126723 amu
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Muffins the dog is out of control when it comes to tissue paper. She loves to eat tissues. If you leave her in a room with a tissue box, she will take 7 seconds to eat one tissue. If there are 150 tissues in a box, how many minutes does it take for Muffin to eat the whole box of tissues?
List 10 elements used in a tesla vehicle
The elements used in a tesla are given below.
What is an element?
A chemical element is a type of atom with a certain number of protons in its nucleus, including the pure material made up entirely of that species. Chemical elements, unlike chemical compounds, cannot be broken down into simpler substances by any chemical process. The number of protons in an element's nucleus is its defining attribute and is referred to as its atomic number.
Aluminum, Copper, Titanium, Nickel, Cobalt, Manganese, Lithium, Iron, Phosphorus, Boron are the elements used in tesla vehicle.
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MgO+HCI→asmomo + H₂O
Answer:
When magnesium oxide reacts with hydrochloric acid, magnesium chloride and water is formed. The reaction involved is: MgO+2HCl→MgCl2+H2O
percent error: a balance measured the mass of 1.0000g & its standard measurement is 0.9981g
The percentage error of the balance is 0.19%
Formula for percentage errorPercentage error = (absolute error / standard measurement) × 100
How to determine the percentage errorThe pecenrage error of the balance can be obtained as illustrated below:
Measured value = 1.0000 gStandard measurement = 0.9981 gAbsolute error = 1 - 0.9981 = 0.0019 gPercentrage error =?Percentage error = (absolute error / standard measurement) × 100
Percentage error = (0.0019 / 0.9981) × 100
Percentage error = 0.19%
Thus, the perecentage error of the balance is 0.19%
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HELP ME!!!! (1 point)
When Neils Bohr observed that unique wavelengths of light and color were released when different gases were exposed to electrical current, this led him to develop a new model of the atom that reflected what he had discovered about the location of the electrons in an atom. Which statement is most consistent with his proposed model of the atom based on these findings?
a. Electrons were able to move freely throughout the nucleus
b. Electrons were bound tightly inside the nucleus of the atom
c. Electrons were in orbits of both fixed size and energy
d. Electrons were scattered randomly throughout the atom
PERSONAL REQUEST (optional): When you place the answer please include an explanation that shows how the answer connects to the overall question. Thank you! :)
Electrons were in orbits of both fixed size and energy.
The main features of Niels Bohr's proposed atomic model are listed below.
In an atom, a positively charged nucleus is surrounded by negatively charged electrons. These electrons travel along distinct circular trajectories called orbits or shells.According to this atomic model, each of the circular routes, which have set energy levels, is referred to as an orbital shell.The integers n=1, 2, 3,... indicate the energy levels of electrons in various orbits and are referred to as quantum numbers. These numbers correspond to the shells K, L, M, and N for the integers 1, 2, and 3, respectively. Since it is nearest to the nucleus and has the lowest energy level of an electron (n=1), it is sometimes referred to as the ground state.An electron can go to a higher energy orbital shell by receiving energy (or photons), and it can move to a lower energy level or orbital shell by losing energy.To learn more about Niels Bohr's refer the link:
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□
5. Which of the following measurements have four significant figures? Select all that apply.
5,000 s
120.0 mL
0.0007 cm
1,001 g
Answer:
1001
Explanation:
Zeroes between non zero digits are significant
Answer:
1001 g and 120.0 mL
Explanation:
Zeros in-between natural numbers are significant
If your number has a decimal place, and you have zeroes after a natural number, then all the zeros are sig figs.
Ex: 10000.0 = 6 sig fig
Not: 0.00001 = 1 sig fig
Not: 0012.0 = 3 sig fig
you've purchased a 12 ounce can of frozen orange juice concentrate at kroger. the instructions tell you to mix the contents of the can (the frozen oj) with 36 ounces of water (roughly 3 cans of water). name the solvent in this scenario
The solvent is water.
What are solutes and solvents and how do you differentiate them?
Solute-
A solute is a material that can be broken down by a solvent to form a solution. There are numerous ways a solute can exist. It could be a solid, liquid, or gas. The solute is broken up and distributed among its molecules evenly by the solvent, or substance, which causes the solute to dissolve.
Solvent-
Solvents are substances that cause solutes to dissolve and form solutions. Although it can also be a solid, a gas, or a supercritical fluid, we always find solvent as a liquid.
Given that 12 ounces of frozen orange juice is mixed with 30 ounces of water (roughly 3 cans of water), to understand this we can simply write
If 36 = 3
12 = ?
12×3 = 36×OJ
OJ = 1
,i.e, orange juice has one can and water has three cans.
1:3
Simply, orange juice is soluble in water because the solvent in this scenario is water. Due to its polarity and ability to form hydrogen bonds, water makes an excellent solvent, meaning that it can dissolve many different kinds of molecules.
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Atomic Structure worksheet!!
Atomic structure refers back to the structure of an atom comprising a nucleus (center) wherein the protons (undoubtedly charged) and neutrons neutral are gifted. The negatively charged particles called electrons revolve around the center of the nucleus.
10. The elements with the number of particles:-
a. 26 electrons and 26 protons are Iron Fe.
b. Iodine(I)
c. Helium (He)
d. Calcium (Ca)
e. Radon (Rn)
11. Yes/No
a. Yes
b. No
c. Yes,
d.Yes
12. Proton, neutral, negatively, electron
13. Proton and Neutron
14. Proton, Neutron, mass number.
15. a. Proton, neutron electron.
b. atomic number = 5
c. mass number = 11
16. 36 - 25 = 11 neutrons.
An atom is a particle of depending that uniquely defines a chemical element. An atom includes a principal nucleus which is surrounded by way of one or greater negatively charged electrons. The nucleus is undoubtedly charged and carries one or greater distinctly heavy particles called protons and neutrons.
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Although the phospholipid molecules can be in constant lateral movement, they very rarely flip from one side of the bilayer to the other. Which of the answer choices could explain this?.
Although the phospholipid molecules can be in constant lateral movement, they very rarely flip from one side of the bilayer to the other.Therefore the head groups are repelled by the hydrophobic membrane interior.
Even though they sometimes move laterally constantly. The hydrophilic heads of the lipid bilayer membrane, which may contain some polar or water-soluble molecules, face both the cytosol and the external environment, while the hydrophobic tails of both layers, which are completely insoluble in water, face one another, forming a core that discourages mixing. The possibility of molecules flipping is extremely unusual.
The class of lipids known as phospholipids is notable for containing phosphorus-containing compounds and having a significant function in living cells. Due to their amphiphilic properties, they are creating lipid bilayers.
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The complete question is ''Refer to Animation: Fluid Mosaic Model. Although the phospholipid molecules can be in constant lateral movement, they very rarely flip from one side of the bilayer to the other. Which of the following could explain this?A. The head groups are too large to fit between the interior fatty acid tails. B. The cholesterol keeps the phospholipids on the correct side. C. The molecular attraction between the fatty acid tails is too strong. D. The head groups are repelled by the hydrophobic membrane interior''.
The specific heat of the metallic element rhodium is 0. 240 j/g-k at 25°c. If 586 j of heat is added to an 80. 0 g block of rhodium metal that is initially at 25. 0°c, what is the expected final temperature of the block?.
The final temperature of a rhodium metal that has a specific heat of 0.240 J/gK is 328.52K (55.52°C).
How to calculate final temperature?The final temperature of a metal can be calculated using the following formula:
Q = mc∆T
Where;
Q = quantity of heat absorbed or releasedm = mass of substancec = specific heat capacity∆T = change in temperatureAccording to this question, 586J of heat is added to an 80.0 g block of rhodium metal that is initially at 25.0°C. The final temperature can be calculated as follows:
586 = 80g × 0.240J/gK × {T - 298}
586 = 19.2T - 5721.6
19.2T = 6307.6
T = 328.52K
Therefore, the final temperature of a rhodium metal that has a specific heat of 0.240 J/gK is 328.52K (55.52°C).
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A property of materials that shows how good the material is in transferring thermal energy (heat) from a high-temperature region to a low-temperature region within the material is?
Heat is transmitted from hot to cold areas of a substance due to thermal conductivity.
What is thermal conductivity?When a temperature gradient leaves a region perpendicular to it, thermal conductivity is the rate of heat transfer by conduction through the material's unit cross-section area.
Thermal conductivity is measured in Watts per meter of thickness, per degree of temperature difference between two sides (W/mK). The amount of heat energy that a substance can convey depends on its thermal conductivity.
Thermal conductivity is the quantity and rate of heat transmission through a material. High thermal conductivity materials move heat more quickly than materials with poor thermal conductivity.
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Describe How are
the two forms of energy
carried by waves and matter related?
the energy of matter implies the movement of masses, and wave energy has no moving masses
The energy of particles (matter) is the ability to do some work, so the energy can be movement in the form of kinetic energy or in the configuration of a system called potential energy, the sum of these two energies is constant.
A wave is formed as a result of perturbation of the medium by a substance, therefore, for the formation of a wave, a substance supplies energy, for example: in the form of motion, in the form of an electric or magnetic field oscillation, etc.
Waves after formation can move away from the substance that formed them, transferring energy that alternately has kinetic and potential energy, but the total energy is constant.
Therefore, the energy in matter is caused by the movement of the same, and the energy in the wave does not require the movement of matter, so this is a more efficient way of doing the work.
In conclusion, the energy of matter implies the movement of masses, and wave energy has no moving masses.
select the correct answer. what is the si unit used to measure the temperature of a substance? a. degree celsius b. degree fahrenheit c. gram d. kelvin e. mole
The answer is Option (d) Kelvin.
The SI unit used to measure the temperature of a substance is Kelvin.
It is defined as per the International System of units and is denoted by the symbol K.
The temperature can also be measure in the various units such as degree Celsius and degree Fahrenheit but the standard unit is Kelvin.
The temperature "0 K" is considered as the absolute temperature.
The widely used temperature measuring unit is degree Celsius in which water freezes at 0° Celsius and it boils at 100° Celsius.
The interval gap of degree Celsius is equal to the interval gap of degree Kelvin, and the interval gap of 1 degree Celsius is 1.8° Fahrenheit .
Also the 0° Celsius is 273 Kelvin.
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Answer:
Kelvin
Explanation:
does hydrogen-1 have more protons than hydrogen-2?
Your question: does hydrogen-1 have more protons than hydrogen-2?
Your Answer: no, they both have an equal amount, with one protons.
__________________________________________________________
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A gas mixture being used to simulate the atmosphere of another planet at 23°c consists of 337 mg of methane, 148 mg of argon, and 210 mg of nitrogen. The partial pressure of nitrogen at 296 k is 19. 0 kpa. Calculate the total pressure of the mixture.
A gas mix consist of methane, argon , nitrogen, the total pressure of gas mixture is 81.89 kpa.
According to the Dalton's law of partial pressure.
The partial pressure of gas = the mole fraction of gas × total pressure.
Total pressure of gas = some of the partial of all the constituent gases.
no. of mole = mass of substance / mass of one mole
now,
The no. of moles of methane = ( 337 mg × 1 g ) / ( 1000 mg × 16 g/mol)
= 0.0210 g/mols
The no. of moles of argon = (148 / 1000 )g / 40 g/mol
= 0.0037 mols
The no. of moles of nitrogen = (210 / 1000 g) / 28 g/mol
= 0.0075 g/mols
The total no. of moles = 0.0210 + 0.0037 + 0.0075
= 0.0322 mols
The mole fraction of nitrogen = 19.0 kpa
therefore ,
The total pressure = partial pressure of a gas / mole fraction of the gas
= 19.0 kpa / 0.0322
= 81.89 kpa
Thus,A gas mix consist of methane, argon , nitrogen, the total pressure of gas mixture is 81.89 kpa.
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How many atoms does Cr3(PO4)2 have
Answer: 5
Explanation:
Cr3 has 3 atoms
(PO4)2 has 2 atoms
2 + 3 = 5 atoms
Gas stored in a tank at 273 K has a pressure of 388 kPa. The safe limit for pressure is 825 kPa. At what temperature will the gas reach this pressure?
580.47 Kelvin
Gas stored in a tank at 273 K has a pressure of 388 kPa. The safe limit for pressure is 825 kPa.
temperature will the gas reach this pressure =
as per above statement, we have got
p1 = 388 kPa P2 = 825 kPa
T1 = 273 K T2 =
as per ideal gas equation PV = nRT
since n, V , R is constant , so we ignore them,
now equation will become
P1/T1 = P2T2
now putting the values
388/273 = 825/T2
T2 = 825 * 273 ÷ 388
T2 = 224,225/388
T2 = 580.47 Kelvin
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backpackers often use canisters of white gas to fuel a cooking stove's burner. if one canister contains 1.45 l of white gas, and the density of the gas is 0.710 g/cm3 , what is the mass of the fuel in kilograms?
The mass of fuel in kilograms is 1.03 kg.
How do you calculate the mass of fuel?To find the mass, divide the amount of energy required by the amount of energy released per gramme of fuel. The kilojoule units will cancel out, leaving us with grammes.A simple multiplication can be used to calculate the fuel mass flow rate from the fuel to air ratio. The engine air flow rate is normally determined by nozzle conditions. The fuel to air ratio value can be used to calculate the engine's specific fuel consumption.
Steps of the equation:
The density of the gas sample in the canister is 0.710 grams/cm³.
We will use the density to relate the given volume of the canister (1.45 L) to determine the mass in kilograms of the fuel contained in one canister. We need to convert first the given volume in liters to cm³.
1000cm3=1L
The calculation will be:
Volume = 1.45L(1000cm/31L)
Volume=1.45×10³cm³
We can now determine the mass of the fuel.
mass = (0.710grams/cm³) × (1.45×10³cm³)
mass = 1.03×10³grams
We can now convert the calculated mass in grams to kilograms.
mass=1.03×10³grams(1kg/1000grams)
mass =1.03kg
Conclusion:
The mass of fuel in kilograms is 1.03 kg.
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