Chemistry problems

3.1           What is the largest mass of Cl2 that could be prepared from the reaction of 15.0 g of MnO2 and

M            30.0 g of HCl according to the following equation?


MnO2 + 4HCl  ® MnCl2 + Cl2 + 2H2O


A. 0.82 g     B. 5.8 g     C. 12.2 g     D. 14.6 g     E. 58.4 g

3.2           Ammonia reacts with diatomic oxygen to form nitrogen oxide and water vapor:


4NH3 + 5O2   ®  4NO + 6H2O


When 40.0 g NH3  and 50.0 g O2 are allowed to react, which is the limiting reagent?


A. NH3     B. O2     C. neither


3.3                 When 22.0 g NaCl and 21.0 g H2SO4 are mixed and react according to the equation below, which

M            is the limiting reagent?


2NaCl + H2SO4  ®  Na2SO4 + 2HCl 


A. NaCl      B. H2SO4     C. Na2SO4      D. HCl      E. Neither reagent is limiting.


3.4           Hydrochloric acid can be prepared by the following reaction:


2NaCl(s) + H2SO4(l)  ®  2HCl(g) + Na2SO4(s)


How many grams of HCl can be prepared from 2.00 mol H2SO4 and 150 g NaCl?


A. 7.30 g     B. 93.5 g     C. 146 g     D. 150 g     E. 196