1.

The density of iron is 10.2 cm⁻³.find the mass in m³of a silver block of mass 12kg​

Answer»

Usually, density will have units of

g

m

L

when dealing with a liquid or units of

g

c

m

3

when dealing with a solid.

The mass has units of grams,

g

.

The VOLUME will have units of

m

L

or

c

m

3

We are GIVEN the density and volume, both of which have GOOD units so all we have to do is rearrange the equation to solve for the mass:

d

e

n

s

i

t

y

×

v

o

l

u

m

e

=

m

a

s

s

volume

×

volume

Density

×

Volume = Mass

10.5

g

c

m

3

×

965

c

m

3

Thus, the

A

g

has a mass of

1.01

×

10

4

g


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