So i have no idea how to do this problem. Permanant hard watee contains calcium sulfate and can be softened by adding sodium carbonate. Determine the number of moles sodium carbonate needed to react 27.2 moles of calcium sulfate.
a. Write the chemical equation
b. Balance the chemical equation​

the answer is a. co2, this would be colder than the : )

explanation:

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.