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.

the correct answer is a

it's filtration, but this is an assumption so my apologies if i got this

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

gold is my favorite solid.