When do elements absorb energy and enter an excited state?

N2 + 3H2 → 2NH3+energy a. remove NH3 gas or b. decrease pressure

Balance the following reaction: CH4 + O2 > CO2 + H20 Enter your answer in the space provided.

How do mixtures differ from pure substances?

With $8.75 in your pocket, you decide to treat yourself to lunch. How much can you spend on lunch and still have enough to leave a 15% tip?

Is magnesium hydroxide a stronger base than ammonia?

A cube has a mass of 100 grams and it's density is determined to be 1g/cm^3. The volume of the cube must be

The oxide of titanium, TiO2 is used as a "whitener" in toothpaste. It is obtained from the ore iron (II) titanate, FeTiO3. What is the change, if any, in the oxidation number (oxidation state) of titanium in the reaction

What happened to the mars Climate Orbiter and why? How much money did NASA lose from this incident?

How many bonds are present in HCI? a) 1 b) 3 c) 4 d) 2

Determine the number of moles 1) 20g Na and 2) 34g H2O