Steps Of Balancing Equations Quiz
9 Questions
| Total Attempts: 1552
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A simple way to learn: practicing! By applying the Law of conservation of mass it is easy to have any chemical equation balanced! A few rules and everything is possible!
Questions and Answers
- 1.What happens in a chemical reaction?
- A.
Atoms are destroyed
- B.
Atoms are created
- C.
Atoms are rearranged
- D.
Atoms are heated or cooled
- 2.a ssa A substance that undergoes a change in a chemical reaction is
- A.
A product
- B.
A chemical
- C.
A reactant
- D.
An enzyme
- 3.A chemical equation is balanced by changing or adding
- A.
Chemical symbols
- B.
Subscripts
- C.
Coefficients
- D.
Reactants
- 4.A balanced chemical equation shows the proportions of reactants and products necessary for
- A.
The reaction to occur
- B.
Mass to be conserved.
- C.
Energy use to be minimized.
- D.
Electrolysis to occur.
- 5.If you start with 5 mol of O2 in the reaction 2Mg + O2 ----> 2MgO, how many moles of Mg will you need?
- A.
4
- B.
5
- C.
8
- D.
10
- 6.What coefficients will satisfy the following equation Hg + O2 ----> HgO
- A.
1,1,1
- B.
2,2,1
- C.
2,1,2
- D.
1,2,2
- 7.What coefficients will satisfy the following equation AgNO3 + NaCl ----> AgCl + NaNO3
- A.
2,2,2,1
- B.
1,1,1,1
- C.
1,2,1,2
- D.
2,1,2,1
- 8.What coefficients will satisfy the following equation Al + O2 --> Al2O3
- A.
1,3,2
- B.
4,3,2
- C.
2,2,2
- D.
2,1,3
- 9.What coefficients will satisfy the following equation H2 + O2 ---> H2O
- A.
2,2,1
- B.
2,1,2
- C.
4,1,2
- D.
2,2,2
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