Answer:
A. Weathering breaks down rocks; Deposition leaves them in new places.
Explanation:
Weathering is basically the complete process of rocks breaking apart. In contrast, deposition is when the rocks are moved and carried away from their original place and put in new locations.
% mass of a solution is the mass of the solute present per 100 g of solution. It can be calculated using the formula,

Mass of solute = 4.92 g
Mass of solvent, water = 347 g
Total mass of solution = 347 g + 4.92 g = 351.92 g
Mass % of the solute = 
Therefore, the weight/weight % = 1.398 %
No because it is a gas so (in space) so, it would most likely stay in one place. Your welcome!