Percent Composition Calculations
Chemistry ⇒ Stoichiometry and Chemical Calculations
Percent Composition Calculations starts at 9 and continues till grade 12.
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A 10.0 g sample of a compound contains 2.0 g of hydrogen. What is the percent composition of hydrogen in the compound?
A 200 g sample of a compound contains 80 g of carbon. What is the percent composition of carbon?
A 25.0 g sample of a compound contains 5.0 g of nitrogen. What is the percent composition of nitrogen?
A 50.0 g sample of a compound contains 20.0 g of oxygen. What is the percent composition of oxygen?
A compound contains 14.0 g of nitrogen and 32.0 g of oxygen. What is the percent composition of nitrogen?
A compound contains 24.3% magnesium, 27.0% sulfur, and 48.7% oxygen by mass. What is the empirical formula of the compound?
A compound has a molar mass of 100 g/mol and contains 20 g of hydrogen per mole. What is the percent composition of hydrogen?
A compound has a molar mass of 180 g/mol and contains 72 g of carbon per mole. What is the percent composition of carbon?
A sample of NaCl weighs 58.44 g. How many grams of sodium are present in the sample?
Calculate the percent composition of carbon in \mathrm{C_6H_{12}O_6}.
Calculate the percent composition of chlorine in \mathrm{CaCl_2}.
Calculate the percent composition of nitrogen in \mathrm{NH_4NO_3}.
Calculate the percent composition of phosphorus in \mathrm{P_2O_5}.
Calculate the percent composition of potassium in \mathrm{KNO_3}.
Calculate the percent composition of sulfur in \mathrm{H_2SO_4}.
If a compound is 40% sulfur and 60% oxygen by mass, what is the simplest formula for the compound?
What is the percent composition by mass of hydrogen in \mathrm{H_2O}?
A 5.00 g sample of a compound contains 1.20 g of element X and 3.80 g of element Y. What is the percent composition of element X?
A compound contains 54.5% C, 9.1% H, and 36.4% O by mass. What is its empirical formula?
A compound has the formula \mathrm{Fe_2O_3}. Calculate the percent by mass of iron in the compound.
