A particular sample of crude oil has a density of 0.79g/mL . What is the mass of 2.00barrel of this crude oil in kg, where a barrel of oil is exactly 42 gallons?

Question

joannablackwelder · Answer

density = mass / volume

joannablackwelder · Answer

So, mass = density * volume

joannablackwelder · Answer

However, the units must cancel out. So, we will need to do some converting.

joannablackwelder · Answer

Any ideas on how to do that, @Zurkon ?

anonymous · Answer

I converted the gallons into liters and got 317.974 L. but after that im not sure where to go with it

anonymous · Answer

and that is for both barrels together

joannablackwelder · Answer

Looks good! :)

joannablackwelder · Answer

But the density has volume in units of mL. How many mL is 317.974 L?

anonymous · Answer

It is 317,974 mL

joannablackwelder · Answer

Good!

joannablackwelder · Answer

Now, mass = density *volume since the units of volume are the same.

anonymous · Answer

So the answer is 251.2Kg after converting the g to Kg?

joannablackwelder · Answer

That is correct before rounding using sig figs :)

anonymous · Answer

Thank you so much! :P

joannablackwelder · Answer

No worries :)