# Chemistry - Density

posted by
**Tracey**
.

Automobile batteries contain sulfuric acid. Calculate the number of grams of sulfuric acid in 0.500L of battery acid if the solution has a density of 1.28g/mL and is 38% H2SO4 (small numbers) by mass?

Can you please answer this for me?

density = 1.28 g/mL

mass of 1 L is 1.28 g/mL x 1000 mL = ??

?? g x 0.38 = grams H2SO4 in the 1 L

Now calculate mass in 0.5 L.

Post your work if you get stuck.

I am sorry, but that seems easy until I try it..

Do I start with 1.28g/mL and x by 1000, then take that answer and x by 0.38g H2SO4.

I just don't know how to set this up. Sorry, that is why I am asking for help.

Yes.

1.28 x 1000 x 0.38 x 0.5L/1L = grams of 38% stuff in 1/2 liter.

how do you convert g/mL