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 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?
Which element has the highest percent composition in H2SO4? (1) Hydrogen (2) Sulfur (3) Oxygen
Which element has the lowest percent composition in CaCO3? (1) Calcium (2) Carbon (3) Oxygen
Which of the following best describes percent composition? (1) The ratio of atoms in a compound (2) The mass percentage of each element in a compound (3) The number of moles of each element in a compound (4) The volume percentage of each element in a compound
Which of the following compounds has the highest percent by mass of oxygen? (1) H2O (2) CO2 (3) SO2 (4) NO2
Fill in the blank: The percent composition of calcium in CaCO3 is ________%.
Fill in the blank: The percent composition of carbon in CH4 is ________%.
Fill in the blank: The percent composition of chlorine in NaCl is ________%.
Fill in the blank: The percent composition of nitrogen in N2O is ________%.
True or False: Percent composition can be used to determine the empirical formula of a compound.
True or False: Percent composition can be used to determine the purity of a sample.
True or False: The percent composition of a compound depends on the sample size.
True or False: The percent composition of an element in a compound can be calculated using the formula: (mass of element in 1 mole of compound / molar mass of compound) × 100%.
