3 Cu + 8HNO3 → 3 Cu(NO3)2 + 2 NO + 4 H₂O In the above equation, how many grams of water can be made when 18.5 moles of HNO3 are consumed? Round your answer to the nearest tenth. If you answer is a whole number like 4, report the answer as 4.0 Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.: Molar Element Mass Hydrogen 1 Nitrogen 14 Copper 63.5 Oxygen 16

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### Stoichiometry Problem: Calculating Grams of Water

**Chemical Equation:**
\[ 3 \text{Cu} + 8 \text{HNO}_3 \rightarrow 3 \text{Cu(NO}_3\text{)}_2 + 2 \text{NO} + 4 \text{H}_2\text{O} \]

**Problem:**
In the above equation, how many grams of water can be made when 18.5 moles of \( \text{HNO}_3 \) are consumed?

**Instructions:**
Round your answer to the nearest tenth. If your answer is a whole number like 4, report the answer as 4.0.

**Molar Masses:**
Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.

| Element   | Molar Mass |
|-----------|-------------|
| Hydrogen  | 1           |
| Nitrogen  | 14          |
| Copper    | 63.5        |
| Oxygen    | 16          |

### Process:

1. **Identify the Mole Ratio:**
   \[ 8 \text{ moles of HNO}_3 \rightarrow 4 \text{ moles of H}_2\text{O} \]
   
   Therefore,
   \[ 18.5 \text{ moles of HNO}_3 \rightarrow \left(18.5 \div 8\right) \times 4 \text{ moles of H}_2\text{O} \]

2. **Calculate Moles of Water:**
   \[ \text{Moles of H}_2\text{O} = \left(\frac{18.5}{8}\right) \times 4 \]
   \[ \text{Moles of H}_2\text{O} = 2.3125 \times 4 \]
   \[ \text{Moles of H}_2\text{O} = 9.25 \]

3. **Calculate Grams of Water:**
   The molar mass of water (\( \text{H}_2\text{O} \)):
   \[ (2 \times 1) + 16 = 18 \text{ g/mol} \]
   
   Total grams of water:
   \[ 9.25 \text
Transcribed Image Text:### Stoichiometry Problem: Calculating Grams of Water **Chemical Equation:** \[ 3 \text{Cu} + 8 \text{HNO}_3 \rightarrow 3 \text{Cu(NO}_3\text{)}_2 + 2 \text{NO} + 4 \text{H}_2\text{O} \] **Problem:** In the above equation, how many grams of water can be made when 18.5 moles of \( \text{HNO}_3 \) are consumed? **Instructions:** Round your answer to the nearest tenth. If your answer is a whole number like 4, report the answer as 4.0. **Molar Masses:** Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect. | Element | Molar Mass | |-----------|-------------| | Hydrogen | 1 | | Nitrogen | 14 | | Copper | 63.5 | | Oxygen | 16 | ### Process: 1. **Identify the Mole Ratio:** \[ 8 \text{ moles of HNO}_3 \rightarrow 4 \text{ moles of H}_2\text{O} \] Therefore, \[ 18.5 \text{ moles of HNO}_3 \rightarrow \left(18.5 \div 8\right) \times 4 \text{ moles of H}_2\text{O} \] 2. **Calculate Moles of Water:** \[ \text{Moles of H}_2\text{O} = \left(\frac{18.5}{8}\right) \times 4 \] \[ \text{Moles of H}_2\text{O} = 2.3125 \times 4 \] \[ \text{Moles of H}_2\text{O} = 9.25 \] 3. **Calculate Grams of Water:** The molar mass of water (\( \text{H}_2\text{O} \)): \[ (2 \times 1) + 16 = 18 \text{ g/mol} \] Total grams of water: \[ 9.25 \text
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