2. Atoms & Elements

Where would you look to find the molar mass of an element?

An alloy consists of 30 wt% Zn and 70 wt% Cu. What is the composition of the alloy in atom percent Zn?

What is the molar mass of Mg3(PO4)2?

A 38.0-g sample of the chlorofluorocarbon CF2Cl2 is analyzed. How many grams of chlorine (Cl) are present in the sample? (Atomic masses: C = 12.0 g/mol, F = 19.0 g/mol, Cl = 35.5 g/mol)

Which of the following is the molar mass of acetic acid (CH3COOH)?

What is the primary purpose of determining the formula (molar) mass of a compound?

Given a 0.125 g sample of copper(II) sulfate (CuSO4), how many moles of CuSO4 are present? (Molar mass of CuSO4 = 159.6 g/mol)

How many total atoms are present in one formula unit of Al_2(CO_3)_3?

What is the mass (in grams) of a single molecule of CCl_4?

What is the mass of 4 moles of helium (He)?

What is the molar mass of sodium chloride (NaCl)?

Which of the following statements correctly describes the formula weight (molar mass) of a compound?

What is the molar mass of sodium chloride (NaCl)?

What is the mass (in grams) of 1.27 mol of water (H_2O)?

How many total valence electrons are present in a molecule of CCl_4?