A person has a mass of 63.4 kg .what is that weight in pound

How much heat is released upon converting one mole of steam (18.0 g) from 100.0 ∘c to water at 25.0 ∘c? show work and constants, trying to figure out how it works. only given the heat capacity for steam and water so try to only use that

What is the molar mass of a gas that has density of 2.054 g/l

What if it is did darwin used to support his theory of evolution