Ethylene glycol has a density of 1.11 g/mL If you need exactly 500 mL of this liquid, what mass in grams should you use?
The correct answer and explanation is:
To find the mass of ethylene glycol required, we use the formula for mass, which is: mass=density×volume\text{mass} = \text{density} \times \text{volume}
Given:
- The density of ethylene glycol = 1.11 g/mL
- The volume required = 500 mL
Now, substitute the given values into the formula: mass=1.11 g/mL×500 mL=555 g\text{mass} = 1.11 \, \text{g/mL} \times 500 \, \text{mL} = 555 \, \text{g}
Thus, the mass of 500 mL of ethylene glycol is 555 grams.
Explanation:
Density is defined as the mass per unit volume of a substance. In this case, ethylene glycol has a density of 1.11 g/mL, which means that for every 1 mL of ethylene glycol, its mass is 1.11 grams. When the required volume is 500 mL, you can calculate the mass by multiplying the density by the volume.
This approach is essential in many real-world applications, such as chemistry and engineering, where precise measurements of substances are necessary. Understanding the relationship between mass, volume, and density allows one to convert between these quantities easily, making it possible to determine the exact amount of a substance required for various processes.
In practical terms, if you are handling a substance like ethylene glycol, knowing its density enables you to measure the correct mass when given a specific volume, and vice versa. This is especially useful in laboratories or industries where accurate formulation or mixture ratios are important.