Calculate the mass of water produced from the combustion of

Question

1. Given the following reaction: Na₂S₂O₃ + AgBr → NaBr + Ag₂S₂O₃

a. How many moles of Na₂S₂O₃ are needed to react completely with 42.7 g of AgBr?

b. What is the mass of NaBr that will be produced from 42.7 g of AgBr?

2. Calculate the mass (in kg) of water produced from the combustion of 1.0 gallon (3.8 L) of gasoline (C8H18). The density of gasoline is 0.79 g/mL. Balance the reaction! C₈H₁₈ + O₂→ CO₂ + H₂O

3. KO₂ is used in a closed-system breathing apparatus. It removes carbon dioxide and water from exhaled air. The reaction for the removal of water is:

KO₂ + H₂O → O₂ + KOH

a. What mass of KO₂ produces 235 g of 02?

The KOH produced is used to remove carbon dioxide by the following reaction:

KOH + CO₂ → KHCO₃.

b. What mass of CO₂ can be removed by 123 g of KO₂?

4. PbS(s) + 4 HNO₃(aq) 4 Pb(NO₃)2(aq) + 5(s) + 2 NO₂(g) + 2 H₂0(l)

4.756 g of lead (II) sulfide reacts with 55.83 mL of 4.004 M nitric acid and 0.4271 g of sulfur are produced and isolated (actual product). What is the percent yield?

Hint this is a limiting reactant problem.

5. The average human requires 120.0 grams of glucose (C6H1206) per day. How many grams of CO₂ (in the photosynthesis reaction) are required to react with this amount of glucose? The photosynthetic reaction is:

6CO₂+ 6H₂0 ---> C₆H₁₂O₆ + 6O₂

6. Given the following equation: Cu + 2 AgNO₃ -> Cu(NO₃)₂ + 2 Ag.

a. How many atoms of Cu are needed to react with 3.50 moles of AgNO₃?

b. If 89.5 grams of Ag were produced, how many grams of Cu reacted?

7. 4 S(s) + CH₄(g) + 2 H₂O(1).............. > 4 H₂S(g) + CO₂(g). How many g of H₂S can be made from 120 μg of CH₄?

8. Given the following equation: 2 KCIO₃ ---> 2 KCl + 302. How many decigrams (10dg = 1 g) of 02 can be produced by letting 7.226 x 10²⁴ formula units of KCIO3 react?

9. The human body needs at least 1.03 x 10^-2 mol 02 every minute. If all of this oxygen is used for the cellular respiration reaction that breaks down glucose, how many grams of glucose does the human body consume each minute?

C₆H₁₂O₆(s) + 6O₂(g) ........ > 6CO₂(g) + 6H₂O(1)

10. 90.0 g of FeCl₃ reacts with 52.0 g of H₂S. What is the limiting reactant? What is the mass of HCI produced? What mass of excess reactant remains after the reaction? The reaction is a precipitation reaction

_FeCl₃ (aq)+ H₂S (aq) → ____Fe₂S₃ (s) + _HC1 (aq)