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You need the balanced symbol equation for the reaction. The numbers in front of the formulae show the mole ratios. For example, in the thermal decomposition of calcium carbonate:
CaCO3 --> CaO + CO2
The equation is balanced.
The mole ratio between CaCO3 and CO2 is 1:1 because there is 1 mole of CaCO3 for every mole of CO2
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DevinMole percent is the mole fraction (X) for a component of a mixture times 100.
If you have a solution of 5.0g NaCl and 25.0g H2O, you can find the mole fraction and mole percent for each. The sum of all percents of all of the components of a mixture equals 100.
Determine the moles (n) of NaCl and H2O.
5.0g NaCl x 1mol NaCl/58.44g NaCl = 0.086mol NaCl
25.0g H2O x 1mol H2O/18.016g H2O = 1.39mol H2O
Determine mole fractions (X) of NaCl and H2O.
The sum of all mole fractions in a solution = 1.
XNaCl = nNaCl/(nNaCl + nH2O) = 0.086mol NaCl/(0.086mol NaCl + 1.39mol H2O) = 0.58mol NaCl
XH2O = 1 - 0.58mol = 0.42mol H2O
Determine the mole percent of NaCl and H2O.
Mole percent of NaCl = XNaCl x 100 = 0.58 x 100 = 58%
Mole percent of H2O = XH2O x 100 = 0.42 x 100 = 42%
Mole fraction and mole percent are essentially describing the same quantity, only mole percent uses the conversion of a number to a percentage. That's all the difference there is. Hence, a mole fraction of 0.134 for a component in a mixture is equivalent to 13.4 % in mole percent of that component. Mole percent spans the range from 0 to 100% while mole fraction spans the real values from 0 to 1.
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How do you calculate mass of an unknown liquid in grams per mole?
To calculate the mass of an unknown liquid in grams per mole, you would need to know the substance's molar mass (g/mol) and the amount of the substance in grams. Then, divide the mass in grams by the molar mass to get the value in grams per mole.
What is the mole fraction of solute and solvent is equal to?
When the mole fraction of solute and solvent is equal, it means that both components are present in equal amounts in the solution. This would correspond to a mole fraction of 0.5 for both the solute and solvent.
Explain the henry's law about dissolution of in a liquid?
Henry's law states that, the partial pressure of the gas in vapour phase is proportional to the mole fraction of the gas in the solution.
Molar volume of liquid is greater than molar volume of gas. why?
The molar volume of a liquid is greater than that of a gas because in a liquid, the particles are closer together and have stronger intermolecular forces holding them in place, resulting in a higher density compared to a gas where particles are more spread out and have weak intermolecular forces. This leads to a smaller volume per mole for gases compared to liquids.
Why One mole should represent the same volume?
One mole represents the same number of particles, regardless of the substance. Since the volume that a mole occupies is determined by the substance's molar mass and density, one mole of any substance at the same conditions of temperature and pressure will have the same volume.
