Sul llner 2018 (Fickett) Unit 9: Stoichiometry 94 UNIT 9 BENCHMARK TEST Question

Question

Sul llner 2018 (Fickett) Unit 9: Stoichiometry 94 UNIT 9 BENCHMARK TEST Question 1 Given the following equation 4NH3 + 502 ? 6H20+ 4N0 Marked out of 1.00 F Flag question During the combustion of NH,, there is an increase in the amount of oxygen present,from 5 to 20 moles white the amount o remains unchanged. Given this change in oxygen, what can we say about this chemical reaction? Select one a An increase in the amount of oxygen will cause an increase in both products O b. There will be an excess of oxygen and therefore the amount of NO produced will to 16 moles The amount of NO produced will remain constant in the reaction because oxygen is the limiting reactant d. The ratio of NH3 to NO produced will remain constant since NH, s the linting reactant 0 Question 2 Recipe for S'mores to make one S'more 2 graham crackers 3 squares of milk chocolate 2 marshmallows Marked out of 1.00 F Flag question

Explanation / Answer

The balanced reaction will be

4NH3 + 5O2 ------------ 6H2O + 4NO

The correct answer is Option D, Increasing the O2 will make NH3 as the limiting reagent. Since NH3 is the limiting reagent, so for every mole of NH3 we will get one mole of NO at the product

The ratio of NH3/NO will remain constant since NH3 is the limiting reagent

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