Page 1 of 35
WGU D425 INTRODUCTION TO CHEMISTRY PA AND
OA ACTUAL EXAM 2025
Density converted between mass and volume of a substance
30.2ml sample of ethyl alcohol with a mass of 23.71002g
p=23.71002g/30.2ml=0.7851
p= - answer-p=0.785g/ml
Find mass of and object. density of alcohol is 0.7892g/mL, so
alcohol is 0.7892g per 1ml. determine the mass of alcohol for
2.0mL use
2.0mL*(0.7892g/1mL)= - answer-1.5784g=1.5g
Density = mass/__________ - answer-volume
Calculate the density of 10.4mL sample of a substance with a
mass of 35.12g. Enter the answer in the correct number of
significant figures and include the unit g/mL - answer-Density=
Mass/Volume
3.38
has 3 sig figs
convert 12.5g in to kilograms. enter answer in kg - answer-
1000kg per 1g
, Page 2 of 35
12.5/1000
0.0125
calculate the density of an object that has a mass of 19.378 and a
volume of 15ml. enter as g/ml - answer-Density= Mass/Volume
1.3
2 Sig Figs
a substance has a mass of 42.10g. if the density of the substance
is known to be 2.431g/ml what volume of substance is present -
answer-Density= Mass/Volume
17.31
4 Sig Figs
several samples of a metal weighed and placed into a graduated
cylinder filled with water to measure their volume by water
displacement - answer-Density= Mass/Volume
several samples of metal were weighed and placed into the
graduated cylinder filled water to measure their volume by water
displacement q - answer-
Dimensional Analysis Ex.
how many centimeters are there in 3.55m
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quantity given: 3.55m
3.55m * (100cm/1m)= - answer-3.55m=355cm
Density of an object?
mass of 2.4019 and volume of 1.40mL
2.4019g/1.40mL= - answer-density = 1.7156g/mL= 1.72g/ml
Density of an object?
volume of 32mL and a mass of 12.24g
12.24g/32mL - answer-density= 0.3825g/mL=0.38g/mL
density of an object?
mass of 78.2g/14.2cm^3 - answer-density= 5.507g/cm=
5.51g/cm^3
density of an object?
22.57cm^3/55g - answer-density= 2.43686g/cm^3= 2.4g/cm^3
density of an object?
85g/35mL - answer-density= 2.42857 g/mL= 2.4g/mL
what is the mass of 25.0mL of octane, with a density of 0.702
g/cm
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-Given:25.0mL
conversion factors:
1.1mL
2.0.0702=1cm^3 (mL->cm^3->g)
25.0mL*1cm^3/mL*0.702g= - answer-density= 17.55g= 17.6g
the density of titanium is 4.51g/cm^3. What is the volume in cubic
inches of 3.5Ib of titanium?
conversion factors:
1) 2,2Ib=1Kg
2) 1Kg=10^3g
3) 4.51g= 1cm^3
4) 2.54cm= 1 in Find in^3
Ib-> Kg -> g-> cm^3 -> in^3
3.5Ib* 1Kg/2.2Ib*10^3g/1Kg*1cm^3/4.51g*1in/2.54cm
must multiply (1in/2.54cm)^3=1in^3/16.387cm^3
3.5Ib*1Kg/2.2Ib*10^3g/1Kg*1cm^3*1in^3*16.38cm^3 - answer-
density= 21.53in^3= 22in^3
Calculate the density in g/mL of aluminum with a volume of
0.6cm^3 and a mass of 4.6mg?
Given: 4.6mg and 0.6cm^3
Formula for Density: mass (g)/volume(ml) Find:
WGU D425 INTRODUCTION TO CHEMISTRY PA AND
OA ACTUAL EXAM 2025
Density converted between mass and volume of a substance
30.2ml sample of ethyl alcohol with a mass of 23.71002g
p=23.71002g/30.2ml=0.7851
p= - answer-p=0.785g/ml
Find mass of and object. density of alcohol is 0.7892g/mL, so
alcohol is 0.7892g per 1ml. determine the mass of alcohol for
2.0mL use
2.0mL*(0.7892g/1mL)= - answer-1.5784g=1.5g
Density = mass/__________ - answer-volume
Calculate the density of 10.4mL sample of a substance with a
mass of 35.12g. Enter the answer in the correct number of
significant figures and include the unit g/mL - answer-Density=
Mass/Volume
3.38
has 3 sig figs
convert 12.5g in to kilograms. enter answer in kg - answer-
1000kg per 1g
, Page 2 of 35
12.5/1000
0.0125
calculate the density of an object that has a mass of 19.378 and a
volume of 15ml. enter as g/ml - answer-Density= Mass/Volume
1.3
2 Sig Figs
a substance has a mass of 42.10g. if the density of the substance
is known to be 2.431g/ml what volume of substance is present -
answer-Density= Mass/Volume
17.31
4 Sig Figs
several samples of a metal weighed and placed into a graduated
cylinder filled with water to measure their volume by water
displacement - answer-Density= Mass/Volume
several samples of metal were weighed and placed into the
graduated cylinder filled water to measure their volume by water
displacement q - answer-
Dimensional Analysis Ex.
how many centimeters are there in 3.55m
, Page 3 of 35
quantity given: 3.55m
3.55m * (100cm/1m)= - answer-3.55m=355cm
Density of an object?
mass of 2.4019 and volume of 1.40mL
2.4019g/1.40mL= - answer-density = 1.7156g/mL= 1.72g/ml
Density of an object?
volume of 32mL and a mass of 12.24g
12.24g/32mL - answer-density= 0.3825g/mL=0.38g/mL
density of an object?
mass of 78.2g/14.2cm^3 - answer-density= 5.507g/cm=
5.51g/cm^3
density of an object?
22.57cm^3/55g - answer-density= 2.43686g/cm^3= 2.4g/cm^3
density of an object?
85g/35mL - answer-density= 2.42857 g/mL= 2.4g/mL
what is the mass of 25.0mL of octane, with a density of 0.702
g/cm
, Page 4 of 35
-Given:25.0mL
conversion factors:
1.1mL
2.0.0702=1cm^3 (mL->cm^3->g)
25.0mL*1cm^3/mL*0.702g= - answer-density= 17.55g= 17.6g
the density of titanium is 4.51g/cm^3. What is the volume in cubic
inches of 3.5Ib of titanium?
conversion factors:
1) 2,2Ib=1Kg
2) 1Kg=10^3g
3) 4.51g= 1cm^3
4) 2.54cm= 1 in Find in^3
Ib-> Kg -> g-> cm^3 -> in^3
3.5Ib* 1Kg/2.2Ib*10^3g/1Kg*1cm^3/4.51g*1in/2.54cm
must multiply (1in/2.54cm)^3=1in^3/16.387cm^3
3.5Ib*1Kg/2.2Ib*10^3g/1Kg*1cm^3*1in^3*16.38cm^3 - answer-
density= 21.53in^3= 22in^3
Calculate the density in g/mL of aluminum with a volume of
0.6cm^3 and a mass of 4.6mg?
Given: 4.6mg and 0.6cm^3
Formula for Density: mass (g)/volume(ml) Find:
