Chapter 6

Which sample contains the greatest number of atoms? (a) 27.2 g Cr (b) 55.1 g Ti (c) 205 g Pb

Which sample contains the greatest number of atoms? (a) 10.0 g He (b) 25.0 g Ne (c) 115 g Xe

Determine the number of moles of molecules (or formula units) in each sample. (a) 38.2 g sodium chloride (b) 36.5 g nitrogen monoxide (c) 4.25 kg carbon dioxide (d) 2.71 mg carbon tetrachloride

Determine the mass of each sample. (a) 1.32 mol carbon tetrafluoride (b) 0.555 mol magnesium fluoride (c) 1.29 mmol carbon disulfide (d) 1.89 kmol sulfur trioxide

Complete the table. \(\begin{array}{llll}\text { Compound } & \text { Mass } & \text { Moles } & \begin{array}{l}\text { Number of } \\ \text { Molecules }\end{array} \\\ \mathrm{H}_{2} \mathrm{O} & 112 \mathrm{lg} & \- & \- \\ \mathrm{N}_{2} \mathrm{O} & 6.33 \mathrm{~g} & \- & \- \\ \mathrm{SO}_{2} & \- & 2.44 & \- \\\ \mathrm{CH}_{2} \mathrm{Cl}_{2} & \- & 0.0643 & -\end{array}\)

A mothball, composed of naphthalene (C10H8), has a mass of 1.32 g. How many naphthalene molecules does it contain?

Calculate the mass in grams of each sample. (a) 5.94 * 1020 H2O2 molecules (b) 2.8 * 1022 SO2 molecules (c) 4.5 * 1025 O3 molecules (d) 9.85 * 1019 CH4 molecules

. Determine the number of moles of Cl in 2.7 mol CaCl2.

How many moles of O are in 12.4 mol Fe(NO3)3?

Which sample contains the greatest number of moles of O? (a) 2.3 mol H2O (b) 1.2 mol H2O2 (c) 0.9 mol NaNO3 (d) 0.5 mol Ca(NO3)2