How many grams of copper are in a 38.0 g sample of Cu2S if it is composed of 79.852% Cu

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

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

Define a is a tiny pavket of energy