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WGU D425 INTRODUCTION TO CHEMISTRY -PA AND OA
ACTUAL EXAM(2026) 100%VERIFIED |COMPLETE
QUESTIONS AND ANSWERS | GRADED A+.
Calculate the density of 10.4g/mL 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
(v=m/d), 3.38ml
convert 12.5g in to kilograms. enter answer in kg
0.0125
calculate the density of an object that has a mass of 19.378 and a
volume of 15.0 ml. enter as g/ml
1.29g/ml
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
17.3ml
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several samples of a metal weighed and placed into a graduated
cylinder filled with water to measure their volume by water
displacement
Subtract inital volume from final volume, 1ml= 1cm^3, D=M/V
several samples of metal were weighed and placed into the graduated
cylinder filled water to measure their volume by water displacement q
Dimensional Analysis Ex.
how many centimeters are there in 3.55m
quantity given: 3.55m
3.55m * (100cm/1m)=
3.55m=355cm
Density converted between mass and volume of a substance
30.2ml sample of ethyl alcohol with a mass of 23.71002g
p=0.785g/ml
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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
1.5784g=1.5g
Density = mass/__________
volume
Density of an object?
mass of 2.4019 and volume of 1.40mL
density = 1.7156g/mL= 1.72g/ml
Density of an object?
volume of 32mL and a mass of 12.24g
density= 0.3825g/mL=0.38g/mL
density of an object?
mass of 78.2g/14.2cm^3
density= 5.507g/cm= 5.51g/cm^3
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density of an object?
22.57cm^3/55g
density= 2.43686g/cm^3= 2.4g/cm^3
density of an object?
85g/35mL
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
-Given:25.0mL
conversion factors:
1.1mL
2.0.0702=1cm^3 (mL->cm^3->g)
25.0mL1cm^3/mL0.702g=
density= 17.55g= 17.6g
WGU D425 INTRODUCTION TO CHEMISTRY -PA AND OA
ACTUAL EXAM(2026) 100%VERIFIED |COMPLETE
QUESTIONS AND ANSWERS | GRADED A+.
Calculate the density of 10.4g/mL 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
(v=m/d), 3.38ml
convert 12.5g in to kilograms. enter answer in kg
0.0125
calculate the density of an object that has a mass of 19.378 and a
volume of 15.0 ml. enter as g/ml
1.29g/ml
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
17.3ml
,2|Page
several samples of a metal weighed and placed into a graduated
cylinder filled with water to measure their volume by water
displacement
Subtract inital volume from final volume, 1ml= 1cm^3, D=M/V
several samples of metal were weighed and placed into the graduated
cylinder filled water to measure their volume by water displacement q
Dimensional Analysis Ex.
how many centimeters are there in 3.55m
quantity given: 3.55m
3.55m * (100cm/1m)=
3.55m=355cm
Density converted between mass and volume of a substance
30.2ml sample of ethyl alcohol with a mass of 23.71002g
p=0.785g/ml
,3|Page
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
1.5784g=1.5g
Density = mass/__________
volume
Density of an object?
mass of 2.4019 and volume of 1.40mL
density = 1.7156g/mL= 1.72g/ml
Density of an object?
volume of 32mL and a mass of 12.24g
density= 0.3825g/mL=0.38g/mL
density of an object?
mass of 78.2g/14.2cm^3
density= 5.507g/cm= 5.51g/cm^3
, 4|Page
density of an object?
22.57cm^3/55g
density= 2.43686g/cm^3= 2.4g/cm^3
density of an object?
85g/35mL
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
-Given:25.0mL
conversion factors:
1.1mL
2.0.0702=1cm^3 (mL->cm^3->g)
25.0mL1cm^3/mL0.702g=
density= 17.55g= 17.6g
