What is the second most abundant gas in earth's atmosphere?

How much heat is added if 0.814g of water increase in temperature by 0.351 degree c?

What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees celsius to a solid at the same temperature? melting point of substance y = 35 degrees c; δhvaporization = 3.67 j/mol; δhfusion = 3.30 j/mol. mwsubstance y = 28.22 g/mol. −12.4 j −3.51 x 102 j 1.24 x 101 j 351 j

What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm?