If the density of wood is 0.5g cm-3, what is the mass of a piece of wood of volume (a) 1 cm 3 ?
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5 (blue book) density
1(a) If the density of wood is 0.5g/cm
3
, what is the mass of
(6)
(i)
1 cm
3
(ii) 2 cm
3
(iii) 10cm
3
M= ? g M= ? g M
= ? g
D= 0.5g/cm
3
D= 0.5g/
cm
3
D=0.5g/cm
3
V= 1cm
3
V=2cm
3
V= 10cm
3
D= M/V D= M/V
D= M/V
M= D X V M= D X V
M= D X V
M = 0.5g/cm
3
X 1cm
3
M= 0.5 g/cm
3
X 2cm
3
M = 0.5g/cm
3
X 10cm
3
M= 0.5 g M= 1.0 g M
= 5g
1(b) What is the
density of a substance of:
(4)
(i)
mass
100g and volume 10cm
3
(ii) volume 3 m
3
and mass
9kg
D=? D=?
M= 100g
M= 9kg
V = 10cm
3
V = 3m
3
D=M/V
D=M/V
D= 100g/ 10cm
3
D= 9kg/3m
3
D= 10g/cm
3
D = 3kg/m
3
1(c) The density of gold is 19g/cm
3
. Find the volume of
(4)
(i)
38g of gold (ii) 95g of gold
D= 19g/cm
3
D= 19g/cm
3
M= 38g M = 95 g
D=M/V
D=M/V
V=M/D V=M/D
V= 38g
/
19g/cm
3
V=
95g / 19g/cm
3
V= 2 cm
3
V=5 cm
3
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.
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