What is the mass of 40.34 x 10^23 h2 molecules at stp?

Aside from human impact, which of the following causes less water vapor production over a small area? (2 pderivartin

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

Which is a chemical property of iron? a. it forms iron oxide (rust) when exposed to moisture and air. b. it is a gray–black metal that is hard to the touch. c. it has a melting point of 2795°f (1536°c). d. it is a good conductor of heat