Chemistry Chapter 3 Extra Problems

Chemistry Chapter 3 Extra Problems - Chapter Three Extra...

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Chapter Three Extra Practice Problems 1. Balance the following chemical equations: a) Na + H 2 O Æ NaOH( aq ) + H 2 ( g ) b) C 2 H 4 + O 2 Æ CO 2 + H 2 O c) Al + HCl Æ AlCl 3 + H 2 d) N 2 O 5 + H 2 O Æ HNO 3 e) (NH 4 ) 2 Cr 2 O 7 Æ N 2 + Cr 2 O 3 + H 2 O f) PCl 3 + H 2 O Æ H 3 PO 3 + HCl g) Mg 3 N 2 + HCl Æ MgCl 2 + NH 4 Cl h) C 6 H 6 + O 2 Æ CO 2 + H 2 O i) C 3 H 5 NO + O 2 Æ CO 2 + NO 2 + H 2 O 2. Consider the following chemical equation: C 2 H 5 OH + O 2 Æ CO 2 + H 2 O a) How many moles of CO 2 are produced when 5.00 mol of C 2 H 5 OH is burned according to the equation? b) How many grams of CO 2 are produced when 5.00 g of C 2 H 5 OH is burned according to the equation? 3. Consider the following equation: Na 2 SiO 3 + 8HF Æ H 2 SiF 6 + 2NaF + 3H 2 O a) How many moles of HF are required to dissolve 1.50 mol of Na 2 SiO 3 ? b) How many grams of NaF form when 3.00 mol of HF reacts in this way? c) How many grams of Na 2 SiO 3 can be dissolved by 3.00 g of HF?
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