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Wenger - AP Chemistry > M-2 Mole Relationships > Flashcards

M-2 Mole Relationships Flashcards

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1
Q

The molar mass of CO2 is 44 g/mol. What is the mass of 2 moles of CO2?

A

88 g

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2
Q

The molar mass of CO2 is 44 g/mol. What is the mass of 0.5 moles of CO2?

A

22 g

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3
Q

The molar mass of CO2 is 44 g/mol. What is the mass of 1 mole of CO2?

A

44 g

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4
Q

The molar mass of CO2 is 44 g/mol. How many moles are in 11 g of CO2?

A

0.25 mole

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5
Q

The molar mass of CO2 is 44 g/mol. How many moles are in 66g of CO2?

A

1.5 mole

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6
Q

The molar mass of CO2 is 44 g/mol. How many moles are in 44g of CO2?

A

1.0 mole

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7
Q

Avogadro’s number is 6.0 x 1023 particles/mol. How many moles of F2 molecules can be found in 2.0 moles of F2?

A

1.2 x 1024 molecules

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8
Q

Avogadro’s number is 6.0 x 1023 particles/mol. How many moles of F2 molecules can be found in 1.0 moles of F2?

A

6.0 x 1023 molecules

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9
Q

Avogadro’s number is 6.0 x 1023 particles/mol. How many moles of F2 molecules can be found in 0.50 moles of F2?

A

3.0 x 1023 molecules

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10
Q

Avogadro’s number is 6.0 x 1023 particles/mol. How many moles of F2 molecules can be found in 6.0 x 1023 molecules of F2?

A

1.0 moles

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11
Q

Avogadro’s number is 6.0 x 1023 particles/mol. How many moles of F2 molecules can be found in 9.0 x 1023 molecules of F2?

A

1.5 moles

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12
Q

Avogadro’s number is 6.0 x 1023 particles/mol. How many moles of F2 molecules can be found in 1.5 x 1023 molecules of F2?

A

0.25 moles

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13
Q

Avogadro’s number is 6.0 x 1023 particles/mol. How many moles of F atoms can be found in 6.0 x 1023 molecules of F2?

A

2.0 moles of F atoms

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14
Q

What is the empirical formula of Hg2Cl2?

A

HgCl

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15
Q

What is the empirical formula of NaCl?

A

NaCl

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16
Q

What is the empirical formula of C2H6?

A

CH3

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17
Q

What is the empirical formula of P4H10?

A

P2H5

18
Q

Give a potential molecular formula for NO2.

A

NO2, N2O4, N3O6…

19
Q

Give a potential molecular formula for C2H30.

A

C2H3O, C4H6O2, C6H9O3…

20
Q

How many moles of phosphorus atoms can be found 1.0 mole of H3PO4?

A

1.0

21
Q

How many moles of phosphorus atoms can be found 2.0 mole of H3PO4?

A

2.0 moles

22
Q

How many moles of phosphorus atoms can be found 0.50 mole of H3PO4?

A

0.50 moles

23
Q

How many moles of hydrogen atoms can be found 1.0 mole of H3PO4?

A

3.0 moles

24
Q

How many moles of hydrogen atoms can be found 2.0 mole of H3PO4?

A

6.0 moles

25
Q

How many moles of hydrogen atoms can be found 0.50 mole of H3PO4?

A

1.5 moles

26
Q

How many moles of oxygen atoms can be found 1.0 mole of H3PO4?

A

4.0 moles

27
Q

How many moles of oxygen atoms can be found 2.0 mole of H3PO4?

A

8.0 moles

28
Q

How many moles of oxygen atoms can be found 0.50 mole of H3PO4?

A

2.0 moles

29
Q

The molar mass of carbon is 12 g/mol. The molar mass of oxygen is 16 g/mol. What is the percent by mass of carbon in CO2?

A

27.3% C

30
Q

The molar mass of carbon is 12 g/mol. The molar mass of oxygen is 16 g/mol. What is the percent by mass of oxygen in CO2?

A

72.7% C

31
Q

The molar mass of carbon is 12 g/mol. The molar mass of oxygen is 16 g/mol. What is the mass of carbon in a 10. g sample of CO2?

A

2.7 g of C

32
Q

The molar mass of carbon is 12 g/mol. The molar mass of oxygen is 16 g/mol. What is the mass of oxygen in a 10. g sample of CO2?

A

7.3 g of C

33
Q

A sample of a compound made from carbon and oxygen contains 727 grams of oxygen and 273 g of carbon. Is this compound carbon dioxide?

A

The sample contains 27.3% carbon by mass and 72.7% oxygen by mass. These are the same percentages as CO2 so it could be CO2 but it also could be any formula that is a whole number multiple of CO2 (i.e.; C2O4, C3O6, etc…)

34
Q

A sugar is made from carbon, hydrogen, and oxygen. A sample of the sugar is determine to contain 40.% carbon and 53% oxygen by mass. What percent of the mass comes from hydrogen?

A

7% (100-40-53)

35
Q

What is the mass of one mole of NH3?

A

17.04 g for 1 mol of NH3.

36
Q

What is the mass of one mole of Ca(OH)2?

A

74.10 g for 1 mol of Ca(OH)2.

37
Q

What is the mass of one mole of Fe2(CO3)3?

A

291.73 g for 1 mol of Fe2(CO3)3. (55.85*2+12.01*3+16*9)

38
Q

What is the formula to calculate molar mass?

A

Molar mass = m/n

39
Q

What is the molar mass of a 10. gram sample of a substance that contains 0.50moles of that substance?

A
  1. g/mol; Molar mass = m/n
40
Q

A sample of an unknown substance contains 0.25 moles of molecules when its mass is 52.5 g. What is its molar mass?

A

210 g/mol; Molar mass = m/n

Wenger - AP Chemistry (27 decks)

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