What is two of same elements is called

What uses energy from the sun?

For the following reaction, 22.0 mol of H2 reacts with an excess of O2. 2 H2 (g) + O2 (g) → 2 H2O (l)

An alloy contains 64 g of pure gold and 39 g of pure zinc. What is the percentage of zinc in the alloy

What does carbon dioxide have to do with global warming

What is the length in inches of a 100-meter field?

How did primo levi use his chemistry to survive Auschwitz?

Calculate the percent yield when 500 grams of carbon dioxide react with an excess of water to produce 640 grams of carbonic acid. CO2 + H2O - --> H2CO3

Which of the following is a possible equivalence that can be used in a conversion? A. ten to the negative second power hL over one L B. ten to the negative second power cL over one L C. ten to the first power L over one daL D.

Which process is a chemical change? burning a match boiling water melting ice breaking glass

What form of matter is "vapor"? a. a solid made of a substance that is usually liquid c. a gas made of a substance that is usually solid b. a liquid made of a substance that is usually gas d. a gas made of a substance that is usually liquid