SAT Chemistry Practice Test: Chemical Formulas

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Question 8 questions

Time 5 minutes

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1. K2CrO4

A. +1
B. +2
C. +4
D. +5
E. +6

2. Na2S2O3

A. +1
B. +2
C. +4
D. +5
E. +6

3. PO43-

A. +1
B. +2
C. +4
D. +5
E. +6

4. CaCO3

A. +1
B. +2
C. +4
D. +5
E. +6

5. Mg(HCO3)2

A. +1
B. +2
C. +4
D. +5
E. +6

6. In the formula of a compound, the algebraic sum of the oxidation numbers must be 0

BECAUSE

oxygen's oxidation number in most compounds is ?2.

A. T,F
B. F,T
C. T,T
D. F,F
E. T,T,CE

7. Fluorine is assigned an oxidation number of ?1 in all compounds

BECAUSE

fluorine is the most electronegative element.

A. T,F
B. F,T
C. T,T
D. F,F
E. T,T,CE

8. Balanced equations have the same number of reactant atoms as the product atoms

BECAUSE

the conservation of matter must apply in all regular chemical equations.

A. T,F
B. F,T
C. T,T
D. F,F
E. T,T,CE