2. Atoms & Elements

Which of the following is the correct molar mass (in g/mol) of NH4Cl (s), the product formed in the reaction NH3(g) + HCl(g) → NH4Cl(s)?

What is the molar mass of Al(NO3)3?

Which of the following best describes the molar mass of a compound?

How many moles of CuSO_4 · 5H_2O are present in a 3.10 g sample?

Given that the molar mass of NO_2 is 46.01 g/mol, what is the mass of 9.44 × 10^{24} molecules of NO_2?

Nitrogen gas is a diatomic molecule. What is the molar mass of one mole of nitrogen gas (N_2)?

What is the formula weight (molar mass) of KBr, rounded to two decimal places?

What is the molar mass of AgCl?

What is the molar mass of NH_3?

What is the molar mass of copper(II) sulfate (CuSO_4)?

What is the percent by mass of calcium in CaBr2?

Which of the following is the correct molar mass for the compound FeSO_4?

What is the theoretical percent by mass of magnesium in magnesium oxide (MgO)?

What is the molar mass of sulfur dioxide (SO_2)?

Given that the molar mass of gold (Au) is 197 g/mol, how many atoms are present in a 3.00 g sample of gold?