stoichiometry grams to grams practice problems

Sure! Here are some **grams-to-grams stoichiometry practice problems**. These will help you understand how to convert the mass of a reactant to the mass of a product in a chemical reaction using stoichiometry. I'll also walk you through an example.

### Example Problem:
**How many grams of water are produced when 8.0 grams of hydrogen (H₂) react with excess oxygen (O₂)?**

#### Step-by-Step Solution:
1. **Write the balanced chemical equation**:
   \[
   2H_2(g) + O_2(g) \rightarrow 2H_2O(l)
   \]
2. **Convert grams of H₂ to moles of H₂**:
   \[
   \text{Molar mass of } H_2 = 2.02 \, \text{g/mol}
   \]
   \[
   \text{Moles of H}_2 = \frac{8.0 \, \text{g}}{2.02 \, \text{g/mol}} = 3.96 \, \text{mol}
   \]
3. **Use mole ratio to convert moles of H₂ to moles of H₂O**:
   According to the balanced equation, \( 2 \, \text{mol} \, H_2 \) produces \( 2 \, \text{mol} \, H_2O \).
   \[
   3.96 \, \text{mol} \, H_2 \times \frac{2 \, \text{mol} \, H_2O}{2 \, \text{mol} \, H_2} = 3.96 \, \text{mol} \, H_2O
   \]
4. **Convert moles of H₂O to grams of H₂O**:
   \[
   \text{Molar mass of } H_2O = 18.02 \, \text{g/mol}
   \]
   \[
   \text{Grams of H}_2O = 3.96 \, \text{mol} \times 18.02 \, \text{g/mol} = 71.34 \, \text{g}
   \]
Thus, **71.34 grams of water** are produced.

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### Practice Problems:

1. **How many grams of CO₂ are produced when 50.0 g of propane (C₃H₈) combusts in excess oxygen?**
   \[
   C_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O
   \]

2. **If 20.0 g of sodium (Na) react with excess chlorine (Cl₂), how many grams of sodium chloride (NaCl) will be produced?**
   \[
   2Na + Cl_2 \rightarrow 2NaCl
   \]

3. **How many grams of oxygen (O₂) are required to react with 15.0 g of ammonia (NH₃) to produce nitrogen dioxide (NO₂) and water (H₂O)?**
   \[
   4NH_3 + 7O_2 \rightarrow 4NO_2 + 6H_2O
   \]

4. **If 25.0 g of aluminum (Al) react with excess sulfuric acid (H₂SO₄), how many grams of hydrogen gas (H₂) are produced?**
   \[
   2Al + 3H_2SO_4 \rightarrow Al_2(SO_4)_3 + 3H_2
   \]

5. **How many grams of silver chloride (AgCl) are formed when 5.0 g of silver nitrate (AgNO₃) reacts with excess sodium chloride (NaCl)?**
   \[
   AgNO_3 + NaCl \rightarrow AgCl + NaNO_3
   \]

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### Tip:
When solving stoichiometry problems, always ensure the chemical equation is **balanced** before starting any calculations. This ensures the correct mole ratios for conversion.

Do you want any details on how to solve one of these problems, or do you have any questions?

Explore grams-to-grams stoichiometry practice problems with detailed solutions. Learn how to convert grams of reactants to grams of products using key stoichiometric principles and formulas, including mole conversions and balanced chemical equations. Suitable for high school students in Grades 10-12.

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