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9. C3H8 + 5O2 ---> The reactants of a chemical equation are given above. In a...

9. C3H8 + 5O2 --->
The reactants of a chemical equation are given above. In a balanced chemical equation, the products could be

a. 4CO2 + 3H2O

b. 3CO2 + 4H2O

c. 2CO2 + 3H2O

d. 3CO + 4H2O

10. Mg + 2HCl ---> MgCl2 + H2
If 24.31g of Mg react completely with 72.92g of HCl, according to the reaction above, how many total grams of product should be formed?

a. 24.31g

b. 72.92g

c. 97.23g

d. The reaction must be performed to determine the amount of product formed.

11. ____ HCl + ____ MgO ---> ____ H2O + ____ MgCl2
What coefficients will balance the equation above?

a. 1, 2, 2, 1

b. 2, 1, 2, 1

c. 2, 2, 1, 1

d. 2, 1, 1, 1

12. C5H12 + _____ O2 ---> 5CO2 + 6H2O
What coefficient must be used to balance the equation above?

a. 4

b. 5

c. 8

d. 10

e. 16

13. Na + H2O ---> NaOH + H2
Balance the equation above.

a. Na + 2H2O ---> NaOH + 2H2

b. 2Na + H2O ---> (NaOH)2 + H2

c. 2Na + 2H2O ---> 2NaOH + H2

d. Na2 + H2O2 ---> 2NaOH + H2

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Answer #1

Answer :-

The first reaction is balanced by assuming that only carbon dioxide and water will form and similarly other questions are done using the balanced chemical equation.

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