WGU D425 Intro to Chemistry Objective
Assessment Questions and Answers |
Updated Study Review with Rationales |
A+ Verified
• convert 12.5g in to kilograms. enter answer in kg -✓✓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 -✓✓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 -✓✓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 -✓✓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 -✓✓
• 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=23.71002g/30.2ml=0.7851
p= -✓✓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)= -✓✓1.5784g=1.5g
• Density = mass/__________ -✓✓volume
• Density of an object?
mass of 2.4019 and volume of 1.40mL
2.4019g/1.40mL= -✓✓density = 1.7156g/mL= 1.72g/ml
• Density of an object?
volume of 32mL and a mass of 12.24g
12.24g/32mL -✓✓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
, • 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)
25.0mL*1cm^3/mL*0.702g= -✓✓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 -✓✓density= 21.53in^3=
22in^3
Assessment Questions and Answers |
Updated Study Review with Rationales |
A+ Verified
• convert 12.5g in to kilograms. enter answer in kg -✓✓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 -✓✓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 -✓✓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 -✓✓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 -✓✓
• 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=23.71002g/30.2ml=0.7851
p= -✓✓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)= -✓✓1.5784g=1.5g
• Density = mass/__________ -✓✓volume
• Density of an object?
mass of 2.4019 and volume of 1.40mL
2.4019g/1.40mL= -✓✓density = 1.7156g/mL= 1.72g/ml
• Density of an object?
volume of 32mL and a mass of 12.24g
12.24g/32mL -✓✓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
, • 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)
25.0mL*1cm^3/mL*0.702g= -✓✓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 -✓✓density= 21.53in^3=
22in^3
