Coal is used as a fuel in power stations. The table shows the percentage of carbon and sulfur in four different coal samples.

Sample Percentage (%) by mass in coal
Carbon Sulfur
A 22.1 0.4
B 46.8 0.6
C 66.3 0.9
D 92.0 0.7

plz help me to answer any question you can:
a) Sulfur produces a gas that causes acid rain.
Name the gas.
b) Give one environmental effect caused by acid rain.
c) Which coal sample produces the most acid rain from 1 kg of coal?
Use the table above.
Give a reason for your answer.
Sample
Reason
d) Calculate the mass of coal sample A that would produce the same amount
of carbon dioxide as 1 kg of coal sample C.
Mass of coal sample A = kg
e) Incomplete combustion of coal can produce carbon monoxide.
Carbon monoxide is a toxic gas.
Give two reasons why people may be unaware of the presence of carbon
monoxide.
1.
2.

Part b: study of equilibrium on solubility: mg(oh)2(s) ⇌ mg2+(aq) + 2 oh–(aq) cloudy clear (pink) 7. a. b. 8. a. b. 9. 10. 11. 12. when adding concentrated hydrochloric acid, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 7a. you should indicate which ion was added to or removed from the equilibrium mixture. when adding edta, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 8a. you should indicate which ion was added to or removed from the equilibrium mixture. upon heating in which direction is the equilibrium shifting? upon cooling in which direction is the equilibrium shifting? is the forward reaction a. endothermic explain your answers to questions 9, 10, and 11. (l) left (r) right (l) left (r) right b. exothermic

Give the orbital configuration of the phosphorus (p) atom.

What is the molar mass of a gas that has density of 2.054 g/l