Stoichiometry And Stoichiometric Calculations

Question

A mixture of 2.0 g of H₂ and 32.0 g of O₂ is ignited. According to the reaction 2H₂ + O₂ → 2H₂O, the mass of water formed and the gas remaining after the reaction are respectively: (H = 1, O = 16)

RankGuru · Accepted Answer

1. **Calculate Moles of Each Reactant**:
   - Moles of $H_2 = \frac{2.0}{2} = 1.0$ mol.
   - Moles of $O_2 = \frac{32.0}{32} = 1.0$ mol.
2. **Identify the Limiting Reagent**: From the balanced equation, 2 mol $H_2$ reacts with 1 mol $O_2$.
   - For 1.0 mol $H_2$, we need $\frac{1.0}{2} = 0.5$ mol $O_2$.
   - Available $O_2$ = 1.0 mol (excess).
   - **$H_2$ is the limiting reagent**.
3. **Calculate Product Formed**:
   - 2 mol $H_2$ → 2 mol $H_2O$, so 1.0 mol $H_2$ → 1.0 mol $H_2O$.
   - Mass of $H_2O = 1.0 	imes 18 = 18$ g.
4. **Calculate Remaining $O_2$**:
   - $O_2$ consumed = 0.5 mol = $0.5 	imes 32 = 16$ g.
   - $O_2$ remaining = $32 - 16 = 16$ g.
5. **Verify by Conservation of Mass**: Reactants = $2.0 + 32.0 = 34.0$ g. Products = $18 + 16 = 34.0$ g. Mass is conserved.

Stoichiometry And Stoichiometric Calculations

Select the correct option:

🔒 Solution Hidden from View

More some basic concepts in chemistry Practice Questions

When 5.3 g of Na₂CO₃ reacts with excess HCl according to the equation Na₂CO₃ + 2HCl → 2NaCl + H₂O + ...

Upon complete combustion of 0.45 g of an organic compound containing only C, H, and O, 0.66 g of (...

In the balanced equation for the reaction of aluminium with dilute sulfuric acid to produce aluminiu...

100 mL of 0.5 M (\text{BaCl}_2) solution is mixed with 200 mL of 0.3 M (\text{Na}_2\text{SO}_4) ...

A sample of drinking water was found to contain 0.032 g of fluoride ions dissolved in 16 kg of water...

Consider the reaction: (\text{Fe}_2\text{O}_3 + 3\text{CO} \rightarrow 2\text{Fe} + 3\text{CO}_2)....

A 250 mL solution contains 4.9 g of sulfuric acid ((\text{H}_2\text{SO}_4)). What is the normality...

In the combustion reaction (\text{C}_3\text{H}_8 + 5\text{O}_2 \rightarrow 3\text{CO}_2 + 4\text{H}...

The average atomic mass of chlorine is 35.5 u. Given that chlorine exists as (^{35}\text{Cl}) (ato...

A hydrocarbon contains 92.3% carbon by mass and has a molar mass of 78 g/mol. What is its molecular ...

What mass of sodium hydroxide (NaOH) must be dissolved in 500 mL of water to prepare a 0.4 M solutio...

A solution is prepared by dissolving 18 g of glucose ((\text{C}6\text{H}{12}\text{O}_6), molar m...

About This Question

Solution