Chemistry 101 Final Ivy Tech Questions With Complete Solution

Which is the limiting reactant in the following reaction given that you start with 42.0 g of CO2 and 99.9 g KOH? Reaction: CO2+ 2 KOH ⟶ K2CO3 + H2O A. CO2 B. Not enough information C. KOH D. K2CO3 E. H2O {Ans: C}The element manganese (Mn) has five valence electrons. True False {Ans: False}Consider the following reaction: 2 Mg + O2 ⟶ 2 MgO Δ Hrxn = -1203 kJ. Calculate the amount of heat (in kJ) associated with complete reaction of 4 moles of Mg. A. -1203 kJ B. -601.5 kJ C. -4812 kJ D. None of the above E. -2406 kJ {Ans: E}Hydrogen gas produced in the laboratory by the reaction of zinc and hydrochloric acid was collected over water at 25C. The barometric pressure at the time was 742.5 mm Hg. What is the pressure of dry hydrogen gas if the vapor pressure of water at 25C is 23.8 mm Hg? A. 742.5 mmHg B. 718.7 mmHg C. 766.3 mmHg D. 760.0 mmHg E. None of the above {Ans: B}What is the volume of 28.0g of nitrogen gas at STP? A. 33.6 L B. 11.2 L C. 22.4 L D. 44.8 L E.