Hydrogen gas is produced using the following reaction at STP. 2HCl + Mg --> MgCl2 + H2

How many liters of hydrogen gas is produced, if 34.9 liters of hydrochloric acid (HCl) is put into the reaction?

Alarge marble is dropped in a graduated cylinder with 35ml of water in it. the water level increases to 49ml. what is the volume of the marble

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

Given the following at 25c calculate delta hf for hcn (g) at 25c. 2nh3 (g) +3o2 (g) + 2ch4 (g) > 2hcn (g) + 6h2o (g) delta h rxn= -870.8 kj. delta hf=-80.3 kj/mol for nh3 (g), -74.6 kj/mol for ch4, and -241.8 kj/mol for h2o (g)