Please help me Al + HCl ---> AlCl3 + H2(g)

If you measured the total volume of collected gas over water at 45oC to be 728 ml at a total pressure of 845 torr, how many milliliters of 3.56M HCl would be required to produce the correct amount of Hydrogen?

Define dew point. i am writing this part to be able to ask the question

If two atoms are bonded to a central atom with no lone pairs,how will they be arranged

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?