goood chemistry lab
CUMULATIVE MOLE WORKSHEET
(Chemistry IB)
1. How many molecules are present in 27.0 g of distilled water?
A. 2.7 x 1024
B. 1.5
C. 9.0 x 1023
D. 4.5
2. How many moles of carbon dioxide will be formed when 32.0 g of methane, CH4, burns completely in oxygen?
A. 1.0
B. 2.0
C. 4.0
D. 8.0
3. How many oxygen atoms are present in 0.5 mole of pentahydrated copper(II) sulfate,
CuSO4.5H2O?
A. 2.5
B. 4.5
C. 3.0 x 1023
D. 2.7 x 1024
4. What is the total number of atoms in 3.0 molecules of propanone, CH3COCH3?
A. 10
B. 30
C. 1.8 x 1024
D. 1.8 x 1025
5. Which contains the same number of ions as the value of Avogadro’s constant?
A. 0.5 mol KBr
B. 0.5 mol CaBr2
C. 1.0 mol CaO
D. 1.0 mol K2O
6. Which molecular formulas are possible for a compound which has an empirical formula of C2H4O?
I. CH3CH2OH
II. CH3CH2CH2COOH
III. CH3CH2COOCH3
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
7. Which compound has the empirical formula with the largest mass?
A. CH4
B. C2H4
C. C2H6
D. C6H6
8. What is the maximum mass, in grams, of magnesium oxide that can be formed when 4.8 g of magnesium reacts with oxygen?
A. 4.8 C. 11.2
B. 8.0 D. 12.8
9. Which is a correct statement about the molecular formula of a compound?
A. It shows which functional groups are present in the molecule.
B. It shows how all the atoms are bonded in a molecule.
C. It is the simplest ratio of the atoms of different elements in the molecule.
D. It is an integral multiple of the empirical formula.
10. 98 g of a pure hydrocarbon contains 84 g of carbon. Which statements are correct?
I. The compound has an empirical formula of CH2.
II. The compound has a molecular formula of C7H14.
III. Not enough information has been given to deduce the molecular formula.
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
11. 32 g of a metal, M, reacts with 8 g of oxygen to form an oxide. The formula of the oxide is MO. What is the atomic mass of M in g mol-1?
A. 16
B. 32
C. 64
D. 128
12. What is
(Chemistry IB)
1. How many molecules are present in 27.0 g of distilled water?
A. 2.7 x 1024
B. 1.5
C. 9.0 x 1023
D. 4.5
2. How many moles of carbon dioxide will be formed when 32.0 g of methane, CH4, burns completely in oxygen?
A. 1.0
B. 2.0
C. 4.0
D. 8.0
3. How many oxygen atoms are present in 0.5 mole of pentahydrated copper(II) sulfate,
CuSO4.5H2O?
A. 2.5
B. 4.5
C. 3.0 x 1023
D. 2.7 x 1024
4. What is the total number of atoms in 3.0 molecules of propanone, CH3COCH3?
A. 10
B. 30
C. 1.8 x 1024
D. 1.8 x 1025
5. Which contains the same number of ions as the value of Avogadro’s constant?
A. 0.5 mol KBr
B. 0.5 mol CaBr2
C. 1.0 mol CaO
D. 1.0 mol K2O
6. Which molecular formulas are possible for a compound which has an empirical formula of C2H4O?
I. CH3CH2OH
II. CH3CH2CH2COOH
III. CH3CH2COOCH3
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
7. Which compound has the empirical formula with the largest mass?
A. CH4
B. C2H4
C. C2H6
D. C6H6
8. What is the maximum mass, in grams, of magnesium oxide that can be formed when 4.8 g of magnesium reacts with oxygen?
A. 4.8 C. 11.2
B. 8.0 D. 12.8
9. Which is a correct statement about the molecular formula of a compound?
A. It shows which functional groups are present in the molecule.
B. It shows how all the atoms are bonded in a molecule.
C. It is the simplest ratio of the atoms of different elements in the molecule.
D. It is an integral multiple of the empirical formula.
10. 98 g of a pure hydrocarbon contains 84 g of carbon. Which statements are correct?
I. The compound has an empirical formula of CH2.
II. The compound has a molecular formula of C7H14.
III. Not enough information has been given to deduce the molecular formula.
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
11. 32 g of a metal, M, reacts with 8 g of oxygen to form an oxide. The formula of the oxide is MO. What is the atomic mass of M in g mol-1?
A. 16
B. 32
C. 64
D. 128
12. What is