How many moles of aluminum are needed to make 9 moles of molecular hydrogen? given the reaction: 2 al + 6 hcl → 2 alcl3 + 3h2 6 moles 4 moles 3 moles 2 moles none of the above?

How many moles of CaCl2 are required to prepare 2.00 liters of 0.700 M CaCl2?

Which body system processes food into a useable source of energy?

How many molecules are there in 8.00 grams of glucose, C6H12O6

Which half reaction equation correctly represents a reduction reaction? a. Li + e - - -> Li+ b. Na + e - - -> Na+ c. Br2 + 2e - - -> 2Br- d. Cl2 + e - - -> 2Cl-

Which of the following is a chemical change? A.) A mixture of sulfur and iron filings are heated until the contents glow red and the appearance of the mixture changes. A magnet can no longer remove iron filings. B.

How many valence electrons are in atom of sulfur?

My sister needs this answered! Donald is creating an experiment to determine if fertilizer affects plant color. He makes this statement: "If each plant receives a different amount of fertilizer, then the plant's color intensity will change.

What would happen to life if earth were in a different location within the solar system

Substance that undergoes a change in a chemical reaction is a. a product c. a reactant. b. a chemical. d. an enzyme.

List the number of protons, neutrons, and electrons in Iodine-127. (atomic number is 53)