Choose the best answer for each of the following: Question 1 options: Density of
ID: 104447 • Letter: C
Question
Choose the best answer for each of the following:
Question 1 options:
Density of a substance
Unit of molar mass
Molar mass of a compound
Common density unit of a liquid
Defined as the number of molecules in one gram of the compound.
Defined as the amount of volume of the substance per unit mass.
Defined as the mass in grams of one mole of the compound.
Defined as the mass in grams of one molecule of the compound.
Defined as the product of the substance’s mass and volume.
Defined as the moles of the compound per unit gram.
Defined as the amount of mass of the substance per unit volume.
g/molecule
g/mol
g·mL or g·cm3
molecules/g
mL/g or cm3/g
mol/g
g/mL or g/cm3
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Question 2 (1 point)
Generally three steps are involved in a unit analysis.
(1) Read the problem and determine the unit required in the answer.
(2) Analyze the problem and determine the given value that is related to the answer.
(3) Write one or more unit factors to convert the unit in the given value to the unit in the answer.
What is a unit factor?
Question 2 options:
A product of two quantities that are equivalent, for example, 1 ft·12 in.
A ratio of two quantities that are equivalent, for example, 1 ft/12 in.
A sum of two quantities that are equivalent, for example, 1 ft + 12 in.
Density of a substance
Unit of molar mass
Molar mass of a compound
Common density unit of a liquid
1.Defined as the number of molecules in one gram of the compound.
2.Defined as the amount of volume of the substance per unit mass.
3.Defined as the mass in grams of one mole of the compound.
4.Defined as the mass in grams of one molecule of the compound.
5.Defined as the product of the substance’s mass and volume.
6.Defined as the moles of the compound per unit gram.
7.Defined as the amount of mass of the substance per unit volume.
8.g/molecule
9.g/mol
10.g·mL or g·cm3
11.molecules/g
12.mL/g or cm3/g
13.mol/g
14.g/mL or g/cm3
Explanation / Answer
1)
a)
density of substance = mass / volume
this is best expressed by option 7
b)
unit of molar mass is g/mol
option 9
c)
molar mass of a compound is mass of 1 mole of compouns
this is best expressed by option 3
d)
common unit of density is g/cm^3 or g/mL
option 14
Only 1 question at a time please