Nitrogen gas and hydrogen gas combine to produce ammonia gas (NH3). What volume of hydrogen gas at 20 degrees * C and 735 mm is required for the complete reaction of 12.0g of nitrogen?

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

The volume of helium in a blimp is 6.28 x 10^9 millimeters. the density of helium in the blimp is .1786 kilogram/meter^3. find the mass of the helium in the blimp.

3.09 lab: reaction of metals 1 which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.