Use the following data to answer the next 3 questions. Hydrogen gas, H2, is produced when 0.45 mole of magnesium metal reacts completely with excess water.
The other product in the reaction is magnesium hydroxide, Mg(OH)2.
9. Write and balance the chemical equation for this reaction.
10. How many moles of hydrogen gas, H2, are produced?
11. How many moles of water would be required?

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

In which environment would primary succession occur? a forest with a few remaining trees after a recent wildfire an area of exposed rock after a glacier melts away beach that is exposed to the air at low tide an abandoned baseball field in a small town