Question

Ethanol has a density of 0.789 g/cm3.

What is the mass of 225 cm3 of ethanol?
Responses

178 g
178 g

0.0035 g
0.0035 g

285 g
285 g

150 g

Answer 1

To find the mass of ethanol, you can use the formula:

\[
\text{Mass} = \text{Density} \times \text{Volume}
\]

Given:
- Density of ethanol = 0.789 g/cm³
- Volume of ethanol = 225 cm³

Now, plug in the values:

\[
\text{Mass} = 0.789 \, \text{g/cm}^3 \times 225 \, \text{cm}^3
\]

Calculating this:

\[
\text{Mass} = 177.525 \, \text{g}
\]

Rounding this to three significant figures gives approximately 178 g.

So, the correct response is:

**178 g**.