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7 questions
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  • Q1

    How many Zinc atoms  (Zn) on the reactant side?

    Question Image

    4

    1

    2

    30s
    7.PS1.4
  • Q2

    What are the reactants?

    Question Image

    2NaOH + 2H20

    2Na + 2H2O

    2 NaOH + H2

    30s
  • Q3

    How many oxygen atoms (O) are present at the start of the reaction? 

    Question Image

    2

    1

    4

    30s
  • Q4

    The mass of chemical A is 2 grams and the mass of chemical B is 5 grams.  If the two chemicals are mixed and a chemical reaction takes place, what is the mass of the products?

    2

    7

    3

    5

    30s
  • Q5

    How many atoms of Hydrogen(H) are on the reactant side ? 

    Question Image
    Users enter free text
    Type an Answer
    30s
  • Q6

    What are the possible masses for the products A and B? 

    Question Image

    25 g and 25 g

    40g and 20 g

    50 g and 50 g

    30s
  • Q7

    study the diagram of a chemical reaction. How many Hydrogen atoms will be present on the product side of the reaction. 

    Question Image

    2

    6

    1

    30s

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