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For solids and liquids, if you know the density in grams per cubic centimeter, and the Atomic Mass (grams per mole), then you can calculate it.
Moles * (atomic mass) / (density) = volume.
For gasses: you need to know the Pressure and Temperature, and use PV = nRT, so V = n*R*T/P, then convert to cubic centimeters. Or if at Standard Temperature and Pressure (0°C and 1 atmosphere), an Ideal Gas has a volume of 22.4 liters/mole (22400 cm3 / mole)
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How do you convert cubic cm to moles?
You cannot convert cm3 to moles. They do not measure the same quantity. Cubic centimeters measure volume (the amount of space an object takes up) and moles measure the amount of a substance. The mole is one of the seven fundamental SI units, whereas cubic centimeters is a derived unit.
How do you convert milliequivalent to percentage?
To convert milliequivalents (mEq) to a percentage, you need to know the molecular weight of the substance. Divide the milliequivalents by the molecular weight to get the number of moles. Then, convert moles to grams by multiplying by the molecular weight. Finally, divide the weight in grams by the total weight of the solution and multiply by 100 to get the percentage.
In the reaction 2 RbNO3-- 2 RbN plus 3O2 how many moles of O2 are produced when 5 mol of RbNO3 decompose?
5 moles RbNO3 (3 moles O2/2 moles RbNO3) = 7.5 moles oxygen gas produced
What can the coefficients in a balanced chemical equation always express the ratio of?
Moles of one substance compared to moles of the second substance. Ex. moles of reactant A compared to moles pf product F
What is the empirical formula of a compound that contains 32.39 percent sodium 22.53 percent sulfur and 45.07 percent oxygen?
First assume you have 100 g of the substance & then convert to moles using the molecular weight of each element:Na: 32.39 g / (22.99 g/mol) = 1.409 mol NaS : 22.53 g / (32.07 g/mol) = 0.703 mol SO : 45.07 g / (16.00 g/mol) = 2.817 mol ONext divide each mole amount by the smallest one of the group, in this case sulfur. This gives you the ratio of each element in the compound.Na: 1.409 mol / 0.703 mol = 2.00S : 0.703 mol/0.703 mol = 1.00O: 2.817 mol/0.703 mol = 4.01Round to the nearest whole number & you get the formula: Na2SO4 (sodium sulfate)
