QQuestionChemistry
QuestionChemistry
The density of isopropyl alcohol (rubbing alcohol) is 0.786 g/mL. What is the mass of a 10.0 mL sample of isopropyl alcohol?
A. 0.0786 g
B. 12.7 g
C. 0.786 g
D. 7.86 g
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Answer
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Step 1:Let's solve this step by step:
Step 2:: Identify the given information
- Density of isopropyl alcohol = $$0.786 \frac{g}{mL}
- Volume of sample = 10.0 \, mL
Step 3:: Recall the density formula
\text{Density} = \frac{\text{Mass}}{\text{Volume}}
Density is defined as mass divided by volume:
Step 4:: Rearrange the formula to solve for mass
\text{Mass} = \text{Density} \times \text{Volume}
Step 5:: Plug in the values
\text{Mass} = (0.786 \, \frac{g}{mL}) \times (10.0 \, mL)
Step 6:: Calculate the mass
\text{Mass} = 7.86 \, g
Final Answer
Explanation: - We used the density formula to calculate mass - Multiplied the density (0.786 \frac{g}{mL}) by the volume (10.0 \, mL) - The result is 7.86 \, g, which corresponds to option D
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