Harry uses a pulley to pull up a bucket of water from a well. He uses chemical energy in his body to apply mechanical energy to the system. Which of the following energy transformations also occurs as the bucket rises?

Al (s) + HCl (aq) - -> AlCl3 (aq) + H2 (g) a. Balance the eqaution b. determine the oxidation state of each atom on each side of the equation c. If 1.562 g of Al reacts completely, how many grams of AlCl3 will be formed? d.

What are some of thr similarties of physical changes and chemical changes?

1. Energy in foods is provided by bal A micronutrients B minerals Needs 70% C vitamins uman 90% D macronutrients Zion 80%

What name is given to this molecule? a. A positively charged molecule. b. This molecule consists of three hydrogen atoms bonded to an oxygen atom. c. Hydronium ion hydroxide ion water methane glucose

Which of the following best describes an atom? A. protons and electrons grouped together in a random pattern. B. protons and electrons grouped together in an alternating pattern. C. a core of protons and neutrons surrounded by electrons. D.

Which if the following is an example of a stratovolcano?

There are five elements named for famous scientists on the periodic table

What character acids is that they react with metals to

The energy of a particular color of green light is 3.81*10-22 kJ/photon. The wavelength of this light is nanometers

How many molecules are in. 25 mole of O2