2. Atoms & Elements

What is the molar mass of N_2?

How many chlorine atoms are present in 29 molecules of chloroform (CHCl_3)?

What is the mass in grams of 5.32 \times 10^{22} molecules of CO_2?

How many grams of CO_2 are present in 2.80 × 10^{24} molecules of CO_2?

What is the total mass, in grams, of 3.01 × 10^{23} atoms of helium gas (He)?

Arrange the following compounds in order from smallest to largest molar mass: H2O, CO2, NH3, CH4.

What is the total number of atoms present in one formula unit of NH_3?

How many moles of FeCl_2 are present in 85.2 g of FeCl_2?

What is the mass of 0.240 mol of glucose (C6H12O6)?

What mass (in grams) of fructose (C6H12O6) is present in 125 mL of a 0.500 mol/L fructose solution?

What is the total mass, in grams, of 6 moles of carbon atoms? (Atomic mass of carbon = 12.011 g/mol)

What is the molar mass of Al_2(CO_3)_3?

Which conversion factor should be used to convert 3 moles of magnesium (Mg) to grams?

Given 0.247 g of N_2O, how many moles of nitrogen atoms (N) are present?

How many grams are present in 5.00 mol of sodium chloride (NaCl)?