U8.4 Study Guide (Calculations with the Mole)

Quiz by Aaron Holley

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- Q1
A method of solving problems in which units are carried through all of the calculations is called ____.

dimensional portal

fractional mathematics

dimensional analysis

unit analysis

30s - Q2
Why do we use dimensional analysis in chemistry?

Users enter free textType an Answer120s - Q3
________ are used in dimensional analysis, which are expressions of quantity in two different units.

integers

superscripts

coefficients

equalities

30s - Q4
Equalities are used to make ___________________, which are fractions in which the numerator and denominator are the same quantity expressed in two different units.

superscripts

integers

coefficients

equalities

30s - Q5
What are the temperature and pressure used when measuring the volume of gases?

40$\backslash degree$F and 14.7 atm

100$\backslash degree$C and 1 atm

0$\backslash degree$C and 700 Torr

0$\backslash degree$C and 1 atm

30s - Q6
What is the volume of one mole of a gas at standard temperature and pressure? (Write your answer to one decimal place and be sure to include the unit.)

Users enter free textType an Answer30s - Q7
How many seconds are in 12.3 hours?

**Type your final answer as a whole number.**Users enter free textType an Answer300s - Q8
How many milligrams are in 4.50 kilograms? (1 g = 1000 mg; 1 kg = 1000 g)

**Type your answer as a whole number.**Users enter free textType an Answer300s - Q9
You are working in a chemistry lab, and you need to convert from 16.3 moles of glucose to mass of glucose. Which of the following is the correct conversion factor that will allow you to complete the calculation

$\backslash frac\{6.022\backslash times10^\{23\}\}\{1\backslash \; mole\}$

$\backslash frac\{22.4\backslash \; L\}\{1\backslash \; mole\}$

$\backslash frac\{180.156\backslash \; g\}\{1\backslash \; mole\}$

$\backslash frac\{1\backslash \; mole\}\{180.156\backslash \; g\}$

120s - Q10
You need to determine the number of moles of a carbon dioxide gas that has a volume of 32.7 L Which of the following is the correct conversion factor that will allow you to complete the calculation

$\backslash frac\{44.01\backslash \; g\}\{22.4\backslash \; L\}$

$\backslash frac\{1\backslash \; mole\}\{22.4\backslash \; L\}$

$\backslash frac\{22.4\backslash \; L\}\{1\backslash \; mole\}$

$\backslash frac\{1\backslash \; mole\}\{44.01\backslash \; g\}$

120s - Q11
1.80 x 10

^{21}_{ }formula units of sodium chloride is equal to ____ moles of NaCl.5.116 x 10

^{-5}moles1.084 x 10

^{45}moles0.00299 moles

0.175 moles

300s - Q12
3.65 moles of hydrofluoric acid (HF) = ____ molecules of HF.

2.20 x 10

^{24}molecules4.40 x 10

^{25}molecules6.06 x 10

^{-24}molecules6.06 x 10

^{22}molecules300s - Q13
1.89 moles of PCl

_{5}has a mass of ____ g..00908 g

393.57 g

259.56 g

2.37 x 10

^{26}g300s - Q14
Convert 128.76 g of copper(II) sulfate to moles.

4.858 x 10

^{23}mole0.807 mole

0.577 mole

20551 mole

300s - Q15
What is the volume of 3.77 moles of nitrous oxide (N

_{2}O) at standard temperature and pressure?0.168 L

84.45 L

165.93 L

5.09 x 10

^{25}L300s