객관식In the reaction between ammonia (NH_3) and phosphoric acid (H_3PO_4) to form ammonium phosphate ((NH_4)_3PO_4), how many moles of ammonia are required to react completely with 3 moles of phosphoric acid?124views
객관식What volume of 1.0 M sodium phosphate solution is required to prepare 4.0 L of 0.80 M sodium phosphate solution?85views
객관식What volume (in liters) of a 0.60 mol/L CaCO3 solution is required to contain 105 g of CaCO3? (Molar mass of CaCO3 = 100 g/mol)92views
객관식When 25.5 grams of NaHCO3 decompose completely, what mass of CO2 is produced? (Molar masses: NaHCO3 = 84.0 g/mol, CO2 = 44.0 g/mol)117views
객관식In terms of stoichiometry, what is the coefficient of O_2 in the balanced chemical equation for the combustion of C_2H_6?92views
객관식Given that air is approximately 21% oxygen by mole, how many moles of propane (C_3H_8) are needed to completely react with the oxygen present in 24.0 moles of air?103views
객관식What mass of Ca(OH)_2 is required to react completely with a 25.00 mL sample of 0.1234 M HCl(aq)?92views
객관식If 5.0 moles of C_3H_8 react completely with oxygen, how many molecules of H_2O are formed?91views
객관식In the reaction 2 H_2 + O_2 → 2 H_2O, how many moles of O_2 are required to completely react with 27.4 mol of H_2?87views
객관식When 3 moles of hydrogen gas (H_2) react completely with 3 moles of oxygen gas (O_2) according to the equation 2H_2 + O_2 → 2H_2O, how many grams of water (H_2O) are produced?86views
객관식When 0.100 moles of bromine (Br_2) react with excess hydrogen gas (H_2) according to the equation Br_2 + H_2 → 2 HBr, how many grams of HBr will be produced?94views