How many moles of solute are present in each of the fol- lowing solutions? (a) 35.0 mL of 1.200 M HNO3 (b) 175 mL of 0.67 M glucose (C,H12O6) 0ach

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Can you please solve 3.84 and all of the sub problems and show all of the work 

# Chemistry Exercises: Molarity and Solution Preparation

## 3.84 How many moles of solute are present in each of the following solutions?
- (a) 35.0 mL of 1.200 M HNO₃
- (b) 175 mL of 0.67 M glucose (C₆H₁₂O₆)

## 3.85 How many grams of solute would you use to prepare each of the following solutions?
- (a) 250.0 mL of 0.600 M ethyl alcohol (C₂H₆O)
- (b) 167 mL of 0.200 M boric acid (H₃BO₃)

## 3.86 How many milliliters of a 0.45 M BaCl₂ solution contain 15.0 g of BaCl₂?

## 3.87 How many milliliters of a 0.350 M KOH solution contain 0.0171 mol of KOH?

## 3.88 The sterile saline solution used to rinse contact lenses can be made by dissolving 400 mg of NaCl in sterile water and diluting to 100 mL. What is the molarity of the solution?

## 3.89 The concentration of glucose (C₆H₁₂O₆) in normal blood is approximately 90 mg per 100 mL. What is the molarity of the glucose?

## 3.90 Copper reacts with dilute nitric acid according to the following equation:
\[ 3 \text{Cu}(s) + 8 \text{HNO}_3(aq) \rightarrow 3 \text{Cu(NO}_3\text{)}_2(aq) + 2 \text{NO}(g) + 4 \text{H}_2\text{O}(l) \]
If a copper penny weighing 3.045 g is dissolved in a small amount of nitric acid and the resultant solution is diluted to 50.0 mL with water, what is the molarity of the \(\text{Cu(NO}_3\text{)}_2\)?

## 3.91 Pennies minted after 1982 are mostly zinc (97.5%) with a copper cover. If a post-1982 penny is dissolved in a small amount of nitric acid, the copper coating reacts
Transcribed Image Text:# Chemistry Exercises: Molarity and Solution Preparation ## 3.84 How many moles of solute are present in each of the following solutions? - (a) 35.0 mL of 1.200 M HNO₃ - (b) 175 mL of 0.67 M glucose (C₆H₁₂O₆) ## 3.85 How many grams of solute would you use to prepare each of the following solutions? - (a) 250.0 mL of 0.600 M ethyl alcohol (C₂H₆O) - (b) 167 mL of 0.200 M boric acid (H₃BO₃) ## 3.86 How many milliliters of a 0.45 M BaCl₂ solution contain 15.0 g of BaCl₂? ## 3.87 How many milliliters of a 0.350 M KOH solution contain 0.0171 mol of KOH? ## 3.88 The sterile saline solution used to rinse contact lenses can be made by dissolving 400 mg of NaCl in sterile water and diluting to 100 mL. What is the molarity of the solution? ## 3.89 The concentration of glucose (C₆H₁₂O₆) in normal blood is approximately 90 mg per 100 mL. What is the molarity of the glucose? ## 3.90 Copper reacts with dilute nitric acid according to the following equation: \[ 3 \text{Cu}(s) + 8 \text{HNO}_3(aq) \rightarrow 3 \text{Cu(NO}_3\text{)}_2(aq) + 2 \text{NO}(g) + 4 \text{H}_2\text{O}(l) \] If a copper penny weighing 3.045 g is dissolved in a small amount of nitric acid and the resultant solution is diluted to 50.0 mL with water, what is the molarity of the \(\text{Cu(NO}_3\text{)}_2\)? ## 3.91 Pennies minted after 1982 are mostly zinc (97.5%) with a copper cover. If a post-1982 penny is dissolved in a small amount of nitric acid, the copper coating reacts
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