If 72.0 grams of aluminum are reacted with 252 grams of hydrochloric acid, what is the mass of the excess reactant leftover after the reaction has reached completion? 2Al(s) + 6HCl(aq) → 2AlCl3(aq) + 3H2(g)

a - 9.84 g
b - 55.3g
c - 72.4g
d - 180g

Listen base your answer to the question on the information below.propane is a fuel that is sold in rigid, pressurized cylinders. most of the propane in a cylinder is liquid, with gas in the space above the liquid level. when propane is released from the cylinder, the propane leaves the cylinder as a gas. propane gas is used as a fuel by mixing it with oxygen in the air and igniting the mixture, as represented by the balanced equation below.c3h8(g) + 5o2(g) → 3co2(g) + 4h2o() + 2219.2 kja small amount of methanethiol, which has a distinct odor, is added to the propane to consumers detect a propane leak. in methanethiol, the odor is caused by the thiol functional group (–sh). methanethiol, ch3sh, has a structure that is very similar to the structure of methanol.what is the correct structural formula for a molecule of methanethiol