Critical item 1:
1 A metal has a density of 19.32 gmL-1. How much does a
piece of metal with a volume of 15.0 mL weigh?
answer
2 The mass of an object consisting of one chemical is 25.0 g. The volume
of this object was determined to be 8.35 mL. What is the density of the
chemical?
answer
3 How much does a piece of wood with a volume of 150 mL weigh if the
density of this wood is
0.65 g mL-1?
answer
1
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Formula:
r = m / V (Note that the SI quantity symbol for density is r.)
19.32 g mL-1 = m / 15.0 mL
m = 290 g
r = m / V
r = 25.0 g / 8.35 mL
r
= 2.99 g mL-1
Formula:
r = m / V
0.65 g mL-1 = m / 150 mL
m = 98 g