Balancing equations Quiz 1

Question 1

After balancing the given equation, what are the coefficients of the reactants? $$ \ \underline{x}{{P}_{ 4}}+\underline{y}HN{{O}_{3}}	o \underline{a}{{H}_{3}}P{{O}_{4}}+\underline{b}N{{O}_{2}}+\underline{c}{{H}_{2}}O$$. What are the values of $$x$$ and $$y$$?

Accepted Answer

$$\dfrac{1}{4}$$

Answer

$$\dfrac{1}{2}$$

Answer

$$\dfrac{1}{3}$$

Answer

$$\dfrac{1}{6}$$

Question 2

In a balanced chemical equation, what is the value of $$NO 2$$ on the product side? $$\underline{a}{{S}_{8}}+\underline{b}HN{{O}_{3}}	o \underline{c}{{H}_{2}}S{{O}_{4}}+\underline{d}N{{O}_{2}}+\underline{e}{{H}_{2}}O$$

Accepted Answer

$$48$$

Answer

$$24$$

Answer

$$16$$

Answer

$$20$$

Question 3

What is the ratio of $${{O}_{2}}$$ and $${{H}_{2}}O$$ in the balanced chemical equation? $$\underline{a}N{{H}_{8}}+\underline{b}{{O}_{2}}	o \underline{c}NO+\underline{d}{{H}_{2}}O$$

Accepted Answer

$$0.83$$

Answer

$$0.25$$

Answer

$$0.75$$

Answer

$$1.33$$

Question 4

What is the ratio of molecule/ion in the balanced equation of the second most electronegative element of the reaction? $$ \ {{N}_{2}}{{H}_{4}}+ClO_{3}^{-}	o NO+C{{l}^{-}}$$

Accepted Answer

$$2.5$$

Answer

$$0.75$$

Answer

$$0.5$$

Answer

$$1.5$$

Question 5

How many $$HF$$ produce in this given balanced chemical equation? $$ \ Xe{{F}_{4}}+{{H}_{2}}O	o Xe+Xe{{O}_{3}}+HF+{{O}_{2}}$$

Accepted Answer

$$24$$

Answer

$$12$$

Answer

$$6$$

Answer

$$4$$