# 9. The density of water is 1.0 g/mL. What is the density of water in pounds/gallon?

##### 2 Answers

#### Explanation:

Use "Dimensional Analysis" to determine what "conversion factors" you will need *before* you do the math.

We need a mass conversion unit (

Volume will take two steps -

NOW we can apply these to our specific example.

#### Explanation:

- Need to know the common equivalence statements that usually are printed at the back of the composition notebooks; i.e.,

#1kg=1000g#

#1kg=2.205lb#

#:. 1000g=2.205lb#

#1L=1000mL#

#1gal=3.785L# - Knowing these facts will also provide you the needed conversion factors to convert the density of water expressed in
#(g)/(ml)# to#(lb)/(gal)# as required.

#a. 1000g=2.205lb#

#(1000g)/(2.205lb) or color(red)((2.205lb)/(1000g)#

3. Either of the reflected values are the possible conversion factors, but careful analysis should be taken so that the desired units are obtained; i.e.,