Two porous containers are filled with hydrogen and neon respectively. Under identical conditions, 2/3 of the hydrogen escape in 6 hours. How long will it take for half of the neon to escape? (This is a Graham's Law question)

Which of the following best explains why the end of a spoon sticking out of a cup of hot water also gets hot? question 7 options: the heat from the hot water is conducted through the spoon handle the hot water heats the air surrounding the upper part of the spoon. the hot water causes a physical change in the spoon handle. the hot water causes a chemical reaction to take place in the spoon.

If you reacted 450 g of trimethylgallium with 300 g of arsine, what mass of gaas could you make?

What mass of iron must be in a hot pack to provide -335kj of heat when the iron reacts with oxygen and is converted to iron (111) oxide according to the following thermochemical equation? 2fe(s) + 1.5o2(g)—> fe2o3(s) delta h= -824.2kj/mol