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

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

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