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- 1. Multiple ChoiceThe substances listed on the right side of a chemical equation are theYieldsReactantsProductsPrecipitates
- 2. Multiple ChoiceThe substances listed on the left side of a chemical equation are theProductsCoefficientsPrecipitatesReactants
- 3. Multiple ChoiceIn chemical reactions, what does the principle of conservation of mass mean?Matter is not created or destroyed.The total mass of the reactants is greater than the total mass of the products.The total mass of the reactants is less than the total mass of the products.Matter is not changed.
- 4. Multiple Choice
How many Aluminium atoms are in Al2O3?
3
2
5
- 5. Multiple Choice
How many Oxygen atoms are in Al₂(SO₄)₃
4
12
7
24
- 6. Multiple ChoiceWhich of the following shows the correct way to balance the chemical equation?
Fe + O2 -> Fe2O34Fe + 3O2 -> 2Fe2O32 Fe + 3O2 -> Fe2O64 Fe + O6 -> 2Fe2O3None of the options are correctly balanced. - 7. Multiple ChoiceWhich of the following reactions is balanced?2CH4 + O2 -> CO2 + H2OCH4 + 2O2 -> CO2 + H2OCH4 + 2O2 -> CO2 + 2H2ONone of the chemical equations are balanced.
- 8. Multiple ChoiceIn the following equation, what are the products?
HCl + Zn → H2 + ZnCl2HCl + ZnH2 + ZnCl2Zn → H2the stuff on the outside - 9. Multiple Choice
30 g of NaCl was decomposed into 20 g of Na and some Cl2. What mass of Cl2 was produced?
10 g
20 g
30 g
2 g
- 10. Multiple ChoiceHow do the following two elements bond together?
Cr3+ O2-CrOCr3O2Cr2O3CrO3 - 11. Multiple ChoiceHow do the following two elements bond together?
K1+ S2-KSK8SK6S3K2S - 12. Multiple ChoiceHow do the following two elements bond together?
Al3+ O2-AlOAl2O3Al3O6Al3O2 - 13. Multiple Choice
Nitrate is a polyatomic ion with a charge of -1.
What is the formula for sodium nitrate?
Na3NO
NaNO
Na3NO3
NaNO3
- 14. Multiple ChoiceWhat is the formula for magnesium chloride?MgClMg2ClMgCl2Mg(ClO3)2
- 15. Multiple Choice
In a chemical reaction, silver chloride precipitates (forms a solid) from a solution. How would this product be represented in a chemical equation?
AgCl(s)
AgCl(aq)
Ag+ + Cl-
AgCl(g)
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