1. If the molar mass of Na2SO4•nH2O is 304.04 g/mol, what is the hydration number 'n'?
A. 8
B. 10
C. 9
D. 7
2. What is the formula for the compound copper (II) sulfate pentahydrate?
3.Hydrates are formed with compounds
A. covalent
B. ionic
C. None of these
D. metallic

For the following, determine the type of reaction and then give products.

Phosphorous acid, h3po3(aq) , is a diprotic oxyacid that is an important compound in industry and agriculture. the values of phosphorous acid are 1.30 6.70 calculate the ph for each of the given points in the titration of 50.0 ml of 1.5 m h3po3(aq) with 1.5 m koh(aq) .

Calculate the molarity of 48.0 ml of 6.00 m h2so4 diluted to 0.250 l .