CHEM PLZ URGENT!!

19. A block of aluminum has a volume of 126.5 cm3. Its density = 2.70 g/cm3. What is the mass
of the aluminum?
A) 342 g
B) 46.9 g
C) 127 g
D) 0.0213 g
E) 124 g

The answer is A.....But I still can't figure it out....I keep getting D as an answer..

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asked by Ania
  1. mass= density*volume

  2. You are dividing density by volume instead of multiplying. BobPursley gave your the correct formula to use.

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    posted by drwls
  3. check your units
    2.70 g/cm^3 * 126.5 cm^3
    units are
    g cm^3/cm^3
    the cm^3 cancel
    and you are left with g, grams

    If you do it upside down somehow, you will end up with cm^6 which you know right off is wrong.

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    posted by Damon

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