2. Atoms & Elements

Given that the molar mass of CCl_4 is 153.81 g/mol, how many grams of CCl_4 are required to obtain 5.000 mol?

What is the molar mass of (NH_4)_2SO_4?

What is the mass, in grams, of 8.50 × 10^{22} molecules of NH_3?

What is the molar mass of calcium nitrate, Ca(NO_3)_2?

A student weighed 0.550 g of lithium chloride (LiCl). What is the number of moles of LiCl in the sample? (Molar mass of LiCl = 42.39 g/mol)

How many grams are in 11.9 moles of chromium (Cr)? (Atomic mass of Cr = 52.0 g/mol)

An alloy consists of 6 atomic percent Pb and 94 atomic percent Sn. What is the weight percent of Pb in the alloy? (Atomic masses: Pb = 207.2 g/mol, Sn = 118.7 g/mol)

Which of the following is the molar mass of molecular oxygen (O_2)?

Given the following gases: O_2, N_2, CO_2, and CH_4, which one has the largest molar mass?

What is the molar mass of H2CrO4?

What is the molar mass of ammonium sulfate, (NH_4)_2SO_4?

What is the molar mass of Cl (chlorine) in grams per mole?

What is the percent composition of sodium in sodium phosphate (Na_3PO_4)?

What is the mass of 0.25 mole of sodium (Na)?

Which of the following statements correctly describes molar mass?