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- 1. Multiple Choice
An oreo cookie has a mass of 20 grams. It gets crushed into crumbs for a recipe. What is the mass of the crumbs?
15 grams
25 grams
20 grams
- 2. Multiple Choice
If reaction starts with 20g of reactants, it will produce ---
a total of 40g of product
a total of 10g of product
a total of 80 g of product
a total of 20g of product
- 3. Multiple Choice
How many of each type of atom are in the formula NH3?
1 nitrogen, 3 hydrogen
3 nitrogen, 3 hydrogen
1 neon, 3 hydrogen
1 nitrogen, 3 helium
- 4. Multiple Choice
How many molecules are represented in the formula 3CO2?
3 carbon, 2 oxygen
6 carbon dioxide
3 carbon dioxide
3 carbon, 6 oxygen
- 5. Multiple Choice
In a reaction A + B ----> C.
Reactant A has 5g and product C has 9g.
How many grams does reactant B should have?
4g
5g
9g
14g
- 6. Multiple Choice
What will have more mass when a chemical change is complete: the reactants before the chemical reaction or the product after the reaction is complete?
They both will have the same mass
The product always has more mass than the reactant
The reactant will have more mass than the product
They both will lose mass after the reaction
- 7. Multiple ChoiceIf there are 4 H atoms on the reactant side, how many H atoms will be on the product side?246You need more information to answer this question
- 8. Multiple ChoiceIs the equation balanced?: 2H2O + O2 --> 4MgO + 3FeYesNo
- 9. Multiple Choice
Balance this equation:
MgCl2 --> Mg4 + Cl2
It's already balanced.
4 MgCl2 --> Mg4 + 4 Cl2
4 MgCl2 --> Mg4 + 5 Cl2
- 10. Multiple Choice
Balance this equation:
2 Li + Cl2 --> LiCl
2 Li + Cl2 --> 4 LiCl2
2 Li + Cl2 --> 2 LiCl
- 11. Multiple Choice
How many atoms of aluminum are on each side of the following equation?
4Al + 3O2 --> 2Al2 O3
2
6
1
4
- 12. Multiple Choice
Matter is anything that ---
takes up space and has mass.
is in our universe.
is light, sound or ideas.
- 13. Multiple Choice
The Law of Conservation of Matter states that the total amount of matter _____ after it undergoes change.
disappears
stays the same
weighs less
explodes
- 14. Multiple ChoiceWhat is the left part of a chemical equation called?
2H2 + O2 --> 2H2OReactantsProductsYieldsChemical Equation - 15. Multiple Choice
What is the right part of a chemical equation called?
2H2 + O2 --> 2H2O
Reactants
Products
Yields
Chemical Equation
- Answer choicesTagsAnswer choicesTags