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1) If the percent yield for the following reaction 80.0%, how many grams of KClO3 are...

1) If the percent yield for the following reaction 80.0%, how many grams of KClO3 are needed to produce 42.0 g of O2?

2 KClO3 (s) > 2 KCl (s) + 3O2 (g)

A) 134g B) 10.5g C) 63.0g D) 62.5g

2) 5.0g of nitrogen is reacted with 5.0 g of hydrogen to produce ammonia according to the chemical equation shown below. Which one of the following statements is false?

N2 (g) + 3 H2 (g) > 2 NH3 (g)

A) 2.8 grams of hydrogen are left over. B) Nitrogen is the limiting reactant

C) The theoretical yield of ammonia is 6.1 g D) Hydrogen is the excess reactant

3) Which of the following molecules has polar bonds but has no net dipole ?

A) CH4 B) NH3 C) CCl4 D) CHCl3

Can you please explain the answers..

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