WGU D425 INTRODUCTION TO CHEMISTRY
107 ACTUAL QUESTIONS AND CORRECT
ANSWERS
◉ convert 12.5g in to kilograms. enter answer in kg.
Answer: 1000kg per 1g
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
quantity given: 3.55m
3.55m * (100cm/1m)=.
Answer: 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=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
◉ 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
-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
107 ACTUAL QUESTIONS AND CORRECT
ANSWERS
◉ convert 12.5g in to kilograms. enter answer in kg.
Answer: 1000kg per 1g
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
quantity given: 3.55m
3.55m * (100cm/1m)=.
Answer: 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=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
◉ 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
-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
