WGU D425 Introduction to Chemistry -PA and OA ACTUAL
EXAM(2025/26) 100%VERIFIED |complete QUESTIONS AND ANSWERS
| GRADED A+.
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 - correct answer
convert 12.5g in to kilograms. enter answer in kg - correct answer 0.0125
calculate the density of an object that has a mass of 19.378 and a volume of 15ml. enter as g/ml
- correct answer
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 - correct answer
several samples of a metal weighed and placed into a graduated cylinder filled with water to
measure their volume by water displacement - correct answer
several samples of metal were weighed and placed into the graduated cylinder filled water to
measure their volume by water displacement q - correct answer
Dimensional Analysis Ex.
how many centimeters are there in 3.55m
quantity given: 3.55m
3.55m * (100cm/1m)= - correct 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= - correct 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)= - correct answer 1.5784g=1.5g
Density = mass/__________ - correct answer volume
Density of an object?
mass of 2.4019 and volume of 1.40mL
,2.4019g/1.40mL= - correct answer density = 1.7156g/mL= 1.72g/ml
Density of an object?
volume of 32mL and a mass of 12.24g
12.24g/32mL - correct answer density= 0.3825g/mL=0.38g/mL
density of an object?
mass of 78.2g/14.2cm^3 - correct answer density= 5.507g/cm= 5.51g/cm^3
density of an object?
22.57cm^3/55g - correct answer density= 2.43686g/cm^3= 2.4g/cm^3
density of an object?
85g/35mL - correct 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= - correct 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 - correct 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:
Density:1) mg->g 4.6mg*10^-3g/1mg=
4.6*10^-3g=
2) cm^3->mL 0.6cm^3*1mL/1cm^3=0.6mL
step 1 by step 2
3) Divide g/mL 4.6*10^-3/mL= - correct answer Density= 0.008 g/mL
what is the density in g/cm^3 of an unknow solution containing 2.3kg and 8.0L - correct answer
Density = 0.29g/cm^3
If ethanol has a density of 0.789 g/mL and a mass of 36.4g. Find the volume in mL - correct
answer Density= 41.6mL
The density of a solution is 0.791 g/cm^3. What is the volume in cubic inches of 2.7 Ib of the
solution? - correct answer 95 in^3
how many centimeters are in 1.24m? - correct answer
Calculate the density of a 74.5ml sample of a substance with a mass of 25.92g. - correct answer
Calculate the density of a 55cm^3 sample of a substance with a mass of 13.4g - correct answer
how many millimeters are in 34 meters - correct answer
talia prepares a bowl of cereal with milk. when she starts to eat the cereal, she immediately
spits it out because the milk has turned sour. which property change is the souring of milk an
example of - correct answer chemical change
the mass of a ball is 141kg. what is its mass in ounces, given 1 oz= 28.35g - correct answer
4.97x10^3 oz.
an irregular shaped metal object of mass 80.4g is placed in a granulated cylinder containing
500.5ml of water. the water level increases to 512.5ml. what is the density of this metal -
correct answer 6.70 g/mL
what is the mass number of an atom containing 17 protons, 18 electrons, and 20 neutrons -
correct answer 37
naturally occurring boron (B) is composed of 19.9% of B-10(10.013amu) and 80.1% of B-11
(11.009amu) what is the average atomic mass of boron? - correct answer 10.81 amu
EXAM(2025/26) 100%VERIFIED |complete QUESTIONS AND ANSWERS
| GRADED A+.
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 - correct answer
convert 12.5g in to kilograms. enter answer in kg - correct answer 0.0125
calculate the density of an object that has a mass of 19.378 and a volume of 15ml. enter as g/ml
- correct answer
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 - correct answer
several samples of a metal weighed and placed into a graduated cylinder filled with water to
measure their volume by water displacement - correct answer
several samples of metal were weighed and placed into the graduated cylinder filled water to
measure their volume by water displacement q - correct answer
Dimensional Analysis Ex.
how many centimeters are there in 3.55m
quantity given: 3.55m
3.55m * (100cm/1m)= - correct 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= - correct 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)= - correct answer 1.5784g=1.5g
Density = mass/__________ - correct answer volume
Density of an object?
mass of 2.4019 and volume of 1.40mL
,2.4019g/1.40mL= - correct answer density = 1.7156g/mL= 1.72g/ml
Density of an object?
volume of 32mL and a mass of 12.24g
12.24g/32mL - correct answer density= 0.3825g/mL=0.38g/mL
density of an object?
mass of 78.2g/14.2cm^3 - correct answer density= 5.507g/cm= 5.51g/cm^3
density of an object?
22.57cm^3/55g - correct answer density= 2.43686g/cm^3= 2.4g/cm^3
density of an object?
85g/35mL - correct 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= - correct 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 - correct 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:
Density:1) mg->g 4.6mg*10^-3g/1mg=
4.6*10^-3g=
2) cm^3->mL 0.6cm^3*1mL/1cm^3=0.6mL
step 1 by step 2
3) Divide g/mL 4.6*10^-3/mL= - correct answer Density= 0.008 g/mL
what is the density in g/cm^3 of an unknow solution containing 2.3kg and 8.0L - correct answer
Density = 0.29g/cm^3
If ethanol has a density of 0.789 g/mL and a mass of 36.4g. Find the volume in mL - correct
answer Density= 41.6mL
The density of a solution is 0.791 g/cm^3. What is the volume in cubic inches of 2.7 Ib of the
solution? - correct answer 95 in^3
how many centimeters are in 1.24m? - correct answer
Calculate the density of a 74.5ml sample of a substance with a mass of 25.92g. - correct answer
Calculate the density of a 55cm^3 sample of a substance with a mass of 13.4g - correct answer
how many millimeters are in 34 meters - correct answer
talia prepares a bowl of cereal with milk. when she starts to eat the cereal, she immediately
spits it out because the milk has turned sour. which property change is the souring of milk an
example of - correct answer chemical change
the mass of a ball is 141kg. what is its mass in ounces, given 1 oz= 28.35g - correct answer
4.97x10^3 oz.
an irregular shaped metal object of mass 80.4g is placed in a granulated cylinder containing
500.5ml of water. the water level increases to 512.5ml. what is the density of this metal -
correct answer 6.70 g/mL
what is the mass number of an atom containing 17 protons, 18 electrons, and 20 neutrons -
correct answer 37
naturally occurring boron (B) is composed of 19.9% of B-10(10.013amu) and 80.1% of B-11
(11.009amu) what is the average atomic mass of boron? - correct answer 10.81 amu
