91Ó°ÊÓ

Calculate the number of moles containing each of the following: (a) \(2.50 \times 10^{22}\) atoms of iron, Fe (b) \(5.00 \times 10^{23}\) molecules of carbon dioxide, \(\mathrm{CO}_{2}\) (c) \(7.50 \times 10^{24}\) formula units of iron(II) carbonate, \(\mathrm{FeCO}_{3}\)

State the molar mass for each of the following: (a) arsenic, As (b) germanium, Ge (c) ozone, \(\mathrm{O}_{3}\) (d) phosphorus, \(P_{4}\)

Calculate the molar mass for each of the following: (a) calcium sulfide, \(\mathrm{CaS}\) (b) calcium sulfate, \(\mathrm{CaSO}_{4}\) (c) iron(II) acetate, \(\mathrm{Fe}\left(\mathrm{C}_{2} \mathrm{H}_{3} \mathrm{O}_{2}\right)_{2}\) (d) iron(II) phosphate, \(\mathrm{Fe}_{3}\left(\mathrm{PO}_{4}\right)_{2}\)

Calculate the molar mass for each of the following: (a) bromine iodide, BrI (b) tribromine octaoxide, \(\mathrm{Br}_{3} \mathrm{O}_{8}\) (c) glycerin, \(\mathrm{C}_{3} \mathrm{H}_{5}(\mathrm{OH})_{3}\) (d) nitroglycerin, \(\mathrm{C}_{3} \mathrm{H}_{5} \mathrm{O}_{3}\left(\mathrm{NO}_{2}\right)_{3}\)

Calculate the mass in grams for each of the following: (a) \(1.21 \times 10^{24}\) atoms krypton, \(\mathrm{Kr}\) (b) \(6.33 \times 10^{22}\) molecules of dinitrogen oxide, \(\mathrm{N}_{2} \mathrm{O}\) (c) \(4.17 \times 10^{21}\) formula units of magnesium perchlorate, \(\mathrm{Mg}\left(\mathrm{ClO}_{4}\right)_{2}\)

Calculate the number of particles in each of the following: (a) 7.57 g platinum, \(P t\) (b) \(3.88 \mathrm{~g}\) ethane, \(\mathrm{C}_{2} \mathrm{H}_{6}\) (c) 0.152 g aluminum chloride, \(\mathrm{AlCl}_{3}\)

Calculate the mass in grams for a single atom of the following elements: (a) beryllium, Be (b) sodium, \(\mathrm{Na}\) (c) cobalt, Co (d) arsenic, As

Calculate the mass in grams for a single molecule of the following compounds: (a) methane, \(\mathrm{CH}_{4}\) (b) ammonia, \(\mathrm{NH}_{3}\) (c) sulfur trioxide, \(\mathrm{SO}_{3}\) (d) nitrogen dioxide, \(\mathrm{NO}_{2}\)

State standard conditions for a gas in degrees Celsius and atmospheres.

State standard conditions for a gas in Kelvin units and atmospheres.