Is the most abundant gas in th earths atmosphere?

a) oxygen
b) nitrogen
c) carbon dioxide
d) methane

Seltzer water is created by placing water under pressure with carbon dioxide gas. which of the following statements best describe seltzer water: a. the solution will be slightly acidic b. the solution will be slightly basic. the solution will be strongly acidic. d. the solution will be strongly basic. e. the solution will be neutral

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution?

Which position represents spring in the southern hemisphere? a) b) c) d)