In addition to the number of moles of CuSO4 calculated in part b, what other quantity must be measured in order to calculate the mass percentage of CuSO4 in the impure sample of CuSO4 (s)?

Imagine that you have produced several versions of lactase, each of which differs from normal lactase by a single amino acid. describe a test that could indirectly determine which of the versions significantly alters the three-dimensional shape of the lactase protein.

What does the symbol (–hfus) indicate in a phase change?

Asample of tin (ii) chloride has a mass of 0.49 g. after heating, it has a mass of 0.41 g.  what is the percent by mass of water in the hydrate?   %