5.0 grams of vinegar and 5.0 grams of baking soda are combined in a beaker. After the fizzing (reaction) has taken place, there are 9 grams of
material remaining in the beaker. What mass of carbon dioxide gas was
produced in the reaction and released to the air? *
10 grams
9 grams
6 grams
1 gram

1 a

2 d

3 a

4 c

explanation:

the answer is definitely c.

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2