M-2 Mole Relationships Flashcards Preview

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Flashcards in M-2 Mole Relationships Deck (40):
1

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

88 g

2

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

22 g

3

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

44 g

4

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

0.25 mole

5

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

1.5 mole

6

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

1.0 mole

7

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?

1.2 x 1024 molecules

8

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?

6.0 x 1023 molecules

9

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?

3.0 x 1023 molecules

10

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?

1.0 moles

11

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?

1.5 moles

12

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?

0.25 moles

13

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?

2.0 moles of F atoms

14

What is the empirical formula of Hg2Cl2?

HgCl

15

What is the empirical formula of NaCl?

NaCl

16

What is the empirical formula of C2H6?

CH3

17

What is the empirical formula of P4H10?

P2H5

18

Give a potential molecular formula for NO2.

NO2, N2O4, N3O6... 

19

Give a potential molecular formula for C2H30.

C2H3O, C4H6O2, C6H9O3... 

20

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

1.0

21

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

2.0 moles

22

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

0.50 moles

23

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

3.0 moles

24

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

6.0 moles

25

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

1.5 moles

26

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

4.0 moles

27

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

8.0 moles

28

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

2.0 moles

29

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?

27.3% C

30

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?

72.7% C

31

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?

2.7 g of C

32

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?

7.3 g of C

33

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?

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

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? 

7%  (100-40-53)

35

What is the mass of one mole of NH3?

17.04 g for 1 mol of NH3.

36

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

74.10 g for 1 mol of Ca(OH)2.

37

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

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

38

What is the formula to calculate molar mass?

Molar mass = m/n

39

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

20. g/mol;   Molar mass = m/n

40

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

210 g/mol;   Molar mass = m/n