# chemistry

Calculate how much acetone (in grams and in kilograms) needs to be weighed to assure that you placed 1.25 liters of acetone inside a bottle that needs to be shipped to a chemical laboratory. For the density use 0.7857 g/mL.

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1. mass = volume x density.
Plug and chug. You know volume and you know density. Calculate mass in grams, then convert to kg. Post your work if you get stuck.

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2. Should I convert the 1.25 liters to mL?

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posted by Julie
3. Since the density is given in g/mL, you should convert acetone from 1.25 L to 1,250 mL to keep the units the same. This will give you the mass in grams (one answer required) and it can be converted to kg (the second answer required).

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4. So, if I did everything right, I should end up with 98.21 g and 0.09821 kg (with significant figures)?

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posted by Julie
5. I get 982.125 grams if I multiply
1,250 x 0.7857. Then convert to kg by dividing by 1000 = 0.982125 kg. Then round to the correct number of s.f.

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