Answer the following questions. (d) A particular sample of crude oil has a density of 0.85 g/mL. What is the mass of 1.00 barrel of this crude oil in kg, where a barrel of oil is exactly 42 gallons?

Key Concepts

Density

Density is defined as mass per unit volume, typically expressed in grams per milliliter (g/mL) or kilograms per cubic meter (kg/m³). It is a crucial property that helps determine how much mass is contained in a given volume of a substance. In this question, the density of crude oil is given as 0.85 g/mL, which will be used to calculate the mass of the oil based on its volume.

Volume Conversion

Volume conversion involves changing a measurement from one unit to another, which is essential when dealing with different systems of measurement. In this case, the volume of crude oil is given in barrels, and we need to convert it to a compatible unit (milliliters or liters) to use the density for mass calculation. Knowing that 1 barrel equals 42 gallons and that 1 gallon is approximately 3.78541 liters will facilitate this conversion.

Mass Calculation

Mass calculation in chemistry often involves using the formula: mass = density × volume. Once the volume of crude oil is converted to a compatible unit, this formula allows us to find the mass of the oil. The final result should be expressed in kilograms, requiring a conversion from grams if necessary, as the density is initially provided in g/mL.