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?

What is Group 1 nonmetal? Type the symbol

6) Explain in your own words what the "danger zone" is and why it is important to safe food preparation.

Choose all the answers that apply. The sun: heats the earth evenly; can acclerate the water cycle; is closer to the earth during the summer; is the perfect distance from earth; causes surface waves

Which is an example of a catalyst? heat stirring decrease in temperature

A buffered solution containing dissolved aniline, C 6 H 5 NH 2, and aniline hydrochloride, C 6 H 5 NH 3 Cl, has a pH of 5.47. A. Determine the concentration of C 6 H 5 NH + 3 in the solution if the concentration of C 6 H 5 NH 2 is 0.215 M.

What is the best name for the molecule below? a compound with 10 total carbons with a double bond and the rest single bonds.

What Word means the gradual change and build up of organisms in an enviroment

If you see the Sun is high in the sky, what can you say about the SUN as viewed from the opposite side of Earth at the same moment?

What element has 8 valence electrons

Which of the following best describes a metal? Brittle, shiny, and solid Brittle, dull, and low density Malleable, shiny, and able to conduct heat or electricity Malleable, dull, and solid, liquid, or gas at room temperature?