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- 1. Multiple ChoiceIn a chemical equation, is it true that -the reactant side and product side can have different numbers of atoms for each elementthere can be different elements on the reactant side and the product sidean element or compound must be accompanied by a phase changethe coefficients indicate the number of molecules of each reactant used and the number of molecules of each product made
- 2. Multiple ChoiceThe reactants are on the left side of the chemical equation.TrueFalse
- 3. Multiple Choice
How many atoms in all are in a molecule of serotonin?
C10H12N2O
2224254 - 4. Multiple ChoiceWhen materials combine to form new compounds it is a chemical change. Which example is a chemical change?baking powder fizzingwater boilingice meltingsugar cube dissolving
- 5. Multiple ChoiceWhich is an example of a chemical reaction?paper cut into small pieceschocolate melting in a panflour and sugar mixed in a bowlcookies baking in an oven
- 6. Multiple Choice
How many total atoms are in this compound? Al2O3
2
5
6
3
- 7. Multiple Choice
How many F atoms are in this compound?
MgF2
2
6
8
12
- 8. Multiple Choice
a substance that is formed as the result of a chemical reaction is called
Product
Reactant
Starters
Enders
- 9. Multiple Choice
How would you describe this chemical formula?
3 H2O3 H2O molecules
3 H2O atoms
3 H2O elements
3 H2O parts
- 10. Multiple Choice
True or False: In a complete chemical equation, there must be the same number of atoms of each element on the reactants and products side.
True
False
- 11. Fill in the Blank
Look at the chemical equation.
How many atoms of mercury (Hg) are in the reactants?
- 12. Fill in the Blank
Look at the chemical equation.
How many atoms of oxygen (O) are in the reactants?
- 13. Fill in the Blank
Look at the chemical equation.
How many atoms of oxygen (O) are in the products?
- 14. Fill in the Blank
Look at the chemical equation.
How many atoms of nitrogen (N) are in the products?
- 15. Fill in the Blank
Look at the chemical equation.
How many atoms of oxygen (O) are in the products?
- 16. Fill in the Blank
Look at the chemical equation.
How many atoms of carbon (C) are in the reactants?
- 17. Fill in the Blank
Look at the chemical equation.
How many atoms of hydrogen (H) are in the products?
- 18. Multiple ChoiceWhich observation(s) might be used as evidence that a chemical reaction occurred?Color changeOdor changeProperties changeAll of the above
- 19. Multiple ChoiceIf you start a chemical reaction with 5 atoms of helium, how many atoms will you have after?4 atoms10 atoms1 atom5 atoms
- 20. Multiple ChoiceIn a chemical reactionThe atoms of the reactants always stay together to form the productsThe atoms of the reactants unbond, rearrange, and then rebond to form the productsNew atoms are formed which combine to make the productsSome atoms disappear while others multiply to form the products
- Answer choicesTagsAnswer choicesTags