If a sample of HCl has a mass of 150.0 g, how many moles of HCl does the sample contain?

How have the greenhouse gasses increased from the year 2000 to 2018

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

At element makes up all organic compounds?