Multiple ChoiceHow many moles of K_2SO_4 are present in 15.0 g of K_2SO_4? (Molar mass of K_2SO_4 = 174 g/mol)50views
Multiple ChoiceA solution is prepared by dissolving 3.35 mol of NaCl in enough water to make 1.00 kg of solution. What is the mole fraction of NaCl (solute) in the solution?31views
Multiple ChoiceIn the balanced chemical equation for the complete combustion of butane (C_4H_{10}), what is the mole ratio of butane (C_4H_{10}) to carbon dioxide (CO_2)?39views
Multiple ChoiceYou have 10.0 g each of Na, Mg, and Al. Which sample contains the greatest number of atoms?39views
Multiple ChoiceIn the context of the mole concept, how many entities (atoms, molecules, or particles) are present in one mole?33views
Multiple ChoiceHow many moles of oxygen gas are present in a balloon containing 20.0 grams of pure oxygen gas (O_2)?39views