Question

Butyric acid has a density of 0.959 g/mL at 20∘C. How many moles of butyric acid are contained in 1.56 mL of butyric acid?

Express your answer to three significant figures and include the appropriate units

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Answer 1

Answer:

We have 0.0170 moles of butyric acid

Explanation:

Step 1: Data given

Density of butyric acid = 0.959 g/mL

Temperature = 20.0°C

Volume = 1.56 mL = 0.00156 L

Step 2: Calculate mass

Density = mass / volume

mass = density * volume

Mass = 0.959 g/mL * 1.56 mL

Mass = 1.496 grams

Step 3: Calculate Number of moles

Number of moles = mass / molar mass

Number of moles = 1.496 grams / 88.11 g/mol

Number of moles = 0.0170 moles

We have 0.0170 moles of butyric acid