At this temperature, the solution can hold a maximum of approximately 190 g of potassium iodide per 100 mL of water. At 40^@"C", 180 g of potassium iodide will actually make for an unsaturated solution, since the maximum solubility at this temperature is 190 g per 100 mL.
Approx. 190g... By definition, rho, is given by the quotient.... rho_"density"="mass"/"volume", and thus has units of gmL^-1-=g*cm^-3... And so we simply rearrange ...
Approximately 11.8kg of water may be heated to 95°C by the heat released by the combustion of methane at 50% efficiency. We'll need some more data to solve this. This question has a lot of parts, which makes for many potential mistakes! Methane's density is approximately (0.423g)/(mL). Thus, we have... 1atm * 200L = n * (0.08206Latm)/(molK) * (273K) therefore n = 8.93mol ...available. If we ...