a. 44 b. 2.64times 10^25g C. 7.31g d. 64g 86. How many molecules of SO_(2) in 1.60 moles? a. 102.1times 10^1 b. 9.63times 10^23 C. 3.76times 10^23 d. 7.62times 10^1 87. What is the percent composition of Cr in chromium oxide (Cr_(2)O_(3)) a. 31.6% b. 68.4% C. 34.2% d. 76.4% 88. Sodium nitrite (NaNO_(2)) is commonly used in processed meat as a preservative. It preserves the red pink color in meats and delays the development of botulism. Find the percent composition of sodiur sodium nitrite. a. 20.30% b. 46.38% C. 33.32% d. 69.00%

86. To find the number of molecules of in 1.60 moles, we can use Avogadro's number, which is molecules per mole.Number of molecules = (Number of moles) x (Avogadro's number)Number of molecules = 1.60 moles x molecules/moleNumber of molecules = moleculesTherefore, the correct answer is b. .87. To find the percent composition of Cr in chromium oxide , we need to calculate the molar mass of the compound and then determine the mass of Cr in one mole of the compound.Molar mass of = (2 x molar mass of Cr) + (3 x molar mass of O)Molar mass of = (2 x 52.00 g/mol) + (3 x 16.00 g/mol)Molar mass of = 152.00 g/molPercent composition of Cr = (Mass of Cr / Molar mass of ) x 100%Percent composition of Cr = (2 x 52.00 g/mol) / 152.00 g/mol x 100%Percent composition of Cr = 68.4%Therefore, the correct answer is b. .88. To find the percent composition of sodium in sodium nitrite , we need to calculate the molar mass of the compound and then determine the mass of Na in one mole of the compound.Molar mass of = (1 x molar mass of Na) + (1 x molar mass of N) + (2 x molar mass of O)Molar mass of = (1 x 22.99 g/mol) + (1 x 14.01 g/mol) + (2 x 16.00 g/mol)Molar mass of = 69.00 g/molPercent composition of Na = (Mass of Na / Molar mass of ) x 100%Percent composition of Na = 22.99 g/mol / 69.00 g/mol x 100%Percent composition of Na = 33.32%Therefore, the correct answer is c. .