Question

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

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.

The answer is given in the image,