Question

Question #16fd2

Answer 1

The hint you need i think is the volume conversion liters to `cm^3`

Explanation:

To start, there is one rule you have to know.

`1 ml = 1cm^3`

The given is 7 liters, so we have to convert that to milliliters by multiplying it by thousand according to the metric system.
`7 Liters rarr 7 *10^3 ml = 7000 ml`

From rule above:
`1 ml = 1cm^3`
`7,000 ml = 7000cm^3`

Now that we have both volume and mass in the desired units (7000 `cm^3` and 200 grams)

`"density"="mass"/"volume"="200/7000=0.02857 g/"cm^3`

Hope that this helps. :)