#3.) hydrogen and oxygen react to produce water, according to the reaction 2h2 (g) + o2 (g) → 2h2o (l). if 3 moles of hydrogen react with 2 moles of oxygen and the yield in the reaction is 80%, how many moles of water are obtained? select one: a. 2 moles b. 2.4 moles c. 2.7 moles d. 3 moles#4.)  which of the following is true about the total number of reactants and the total number of products in the reaction shown below? c5h12(l) + 8o2(g) → 5co2(g) + 6h2o(g)select one: a. 9 moles of reactants chemically change into 11 moles of product. b. 9 grams of reactants chemically change into 11 grams of product. c. 9 liters of reactants chemically change into 11 liters of product. d. 9 atoms of reactants chemically change into 11 atoms of product.#9.)  how many moles of cu are needed to react with 1.23 moles of agno3? cu + 2agno3  → cu(no3)2  + 2agselect one: a. 0.62b. 2.5c. 3.51d. 0.55

3) d) 3 moles H2O

4) a. 9 moles of reactants chemically change into 11 moles of product.

5) a. 0.62

Explanation:

3) The given reaction is:

2H2(g) + O2(g) → 2H2O(l)

It is given that there are: 3 moles H2 and 2 moles of O2

Therefore O2 is the limiting reagent

Based on the stoichiometry:

1 mole of O2 produces 2 moles of H2O if the yield is 100%

For an 80% yield :

moles of H2O produced =

Therefore, the given 2 moles of O2 would produce: 2*1.6 = 3.2 moles H2O

4)

Given reaction:

C5H12(l) + 8O2(g) → 5CO2(g) + 6H2O(g)

The total moles of reactants = 1 + 8 = 9

Total moles of products = 5+6 = 11

Therefore, 9 moles of reactants chemically change into 11 moles of product.

5)

Given reaction:

Cu + 2AgNO3 → Cu(NO3)2 + 2Ag

Based on stoichiometry:

1 mole of Cu reacts with 2 moles of AgNO3

Therefore, moles of Cu that would react with 1.23 moles of AgNO3 is:

=

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds