What meant by the term psudo allelism?​

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 percent by mass of sodium in na2so4?

X-rays are used instead of visible light because x-rays have shorter than visible light, allowing them to produce images of much greater detail. a) energies b) frequencies c) speeds d) wavelengths