Question

. In which of the following reactions do five total molecules of reactants produce four total molecules of products? (Points : 3) N2 + 3H2 2NH3 SnO2 + 2H2 Sn + 2H2O 2H2S + 3O2 2SO2 + 2H2O 2SO2 + O2 2SO3

Answer 1

Answer: The correct answer is
`2H_2S+3O_2\rightarrow 2SO_2+2H_2O`

Step-by-step explanation:

We are asked a reaction in which five molecules of reactants produce 4 molecules of products.

From the given options:

• Option 1:

`N_2+3H_2\rightarrow 2NH_3`

Here, 1 mole of nitrogen is reacting with 3 moles of hydrogen to produce 2 moles of ammonia. In other words, 4 molecules of reactants produce 2 molecules of product.

• Option 2:

`SnO_2+2H_2\rightarrow Sn+2H_2O`

Here, 1 mole of tin oxide reacts with 2 moles of hydrogen to produce 1 mole of tin and 2 moles of water. In other words, 3 molecules of reactants produce 3 molecules of product.

• Option 3:

`2H_2S+3O_2\rightarrow 2SO_2+2H_2O`

Here, 2 moles of hydrogen sulfide reacts with 3 moles of oxygen to produce 2 moles of sulfur dioxide and 2 moles of water. In other words, 5 molecules of reactants produce 4 molecules of product.

• Option 4:

`2SO_2+O_2\rightarrow 2SO_3`

Here, 2 moles of sulfur dioxide reacts with 1 mole of oxygen to produce 2 moles of sulfur trioxide. In other words, 3 molecules of reactants produce 2 molecules of product.

Hence, the correct answer is option 3.

Answer 2

N2 + 3H2 -> 2NH3 has 4 molecules of reactants because it has 1 Nitrogen molecule and 3 Hydrogen molecules. It also has 2 molecules of products because it has 2 ammonia molecules