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Formula And Calculations S3 (Unit 1 N5)
Test Description: S3 Chemistry questions on moles formulae etc.
Instructions: Answer all questions to get your test result.
1) What is the formula for magnesium oxide?
A
MgO
B
MgO₂
C
Mg₂O₂
D
Mg₂O
2) What is the formula mass (molecular mass) of barium chloride BaCl₂?
A
70
B
172
C
137
D
207
3) What is the name of the compound SO₂?
A
Disulfur monoxide
B
Sulfur oxide
C
Sulfur oxygen
D
Sulfur dioxide
4) Balance the following equation.... Fe + Cl₂ ---) FeCl₃
A
1 Fe + 3 Cl₂ ---) 1 FeCl₃
B
4 Fe + 6 Cl₂ ---) 4 FeCl₃
C
2 Fe + 3 Cl₂ ---) 2 FeCl₃
D
4 Fe + 3 Cl₂ ---) 4 FeCl₃
5) What is the gram formula mass of Ca(OH)₂?
A
34g
B
57g
C
74g
D
29g
6) What is the concentration of an solution that contains 1.5 moles of NaCl in 500 cm³ of this solution?
A
1
B
3
C
2
D
1.5
7) You have 500cm³ of a 1.2 mol l⁻¹ solution. What would be the concentration if you had only 50 cm³ of the solution?
A
0.60 mol l⁻¹
B
0.12 mol l⁻¹
C
1.2 mol l⁻¹
D
6.0 mol l⁻¹
8) Convert 40.9 grams CaO to moles.
A
1.37
B
15.18
C
0.73
D
56.08
9) How many moles are in 10 grams of He?
A
40
B
2.5
C
4.00
D
10
10) The correct chemical formula for manganese (III) chloride is
A
MnCl₃
B
MgCl₂
C
Mn₃Cl
D
MgCl₃
*select an answer for all questions
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