Hydrogen fuel cells combine hydrogen and oxygen to produce water and energy. Assume 1 kg of fuel is used, and the mass of the water produced is 1.10 x 10-11 kg. How much energy is produced by this fuel cell?

When wood burns in the presence of oxygen, in what from is energy released? A. Water Vapor B. Hydrogen C. Heat and Light D. More oxygen

The speed of light is the same in every medium. true or false.

D. 100 mph 1. You travel 200 km in 2 hours, what is your speed? a. 10 km per hrb. 400 km/hr c. 100 km/hr

Cream of tartar has a pH that is (acidic or basic)

What type of chemical bond joins a functional group to the carbon skeleton of a large molecule?

Is pure orange juice a solution or a suspension

If a catalyst is used in a reaction: a. the energy of activation increases. b. the reaction rate does not change. c. the reaction rate increases. d. the equilibrium shifts.

Methanol (CH3OH) is produced commercially by the catalyzed reaction of carbon monoxide and hydrogen: CO (g) + 2H2 (g) ⇌CH3OH (g). An equilibrium mixture in a 1.50 L vessel is found to contain 0.0679 mol CH3OH, 0.160 mol CO, and 0.302 mol H2 at 500 K.

Explain why an object when thrown in the air or slid across the ground doesn't travel forever

The length of time required for half of the radioactive atoms in a sample to decay is its a. half-life. b. relative date. c. radioactive date. d. period