1.

Consider the equation 2A + 3B ® C If 4.0 mol of A is reacted with 4.0 mol of B, which of the reactants is limiting? A. Neither is limiting because equal amounts (4.0 mol) of each reactant are reacted. B. A is limiting because 2 is smaller than 3 (the numbers refer to the coefficients in the balanced equation). C. A is limiting because there are 2 mol and 4.0 mol are needed. D. B is limiting because 3 is larger than 2 (the numbers refer to the coefficients in the balanced equation). E. B is limiting because there are 4.0 mol and 6.0 mol are needed.

2.	The balanced equation 2Cu(s) + O2(g) ® 2CuO(s) tells us that 1 mol of Cu A. reacts with 1 mol of O2 B. produces 1 mol of CuO C. must react with 32 g of O2 D. cannot react with oxygen E. produces 2 mol of CuO

3.	The equation for a reaction should be balanced before doing stoichiometric calculations. A. True B. False

4.	When 1.0 mol of Fe reacts with Cl2 according to the equation 2Fe + 3Cl2 ® 2FeCl3 how many moles of CL2 are required to react with all the iron? A. 1.0 mol B. 0.67 mol C. 1.5 mol D. 3.0 mol E. none of these

5.	Sodium and water react according to the reaction 2Na(s) + 2H2O(l) ® 2NaOH(aq) + H2(g) What number of moles of H2 will be produced when 4 mol Na is added to 2 mol H2O? A. 1 mol B. 2 mol C. 3 mol D. 4 mol E. none of these

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