A 5.0g sample of Cu(NO3)2•nH2O is heated, and 3.9g of the anhydrous salt remains. what is the value for n?

2.9

Explanation:

Molar mass of Cu(NO3)2 = 187.5 g/mol

Molar mass of water = 18.0 g/mol

%H2O = (5.0 g - 3.9 g) / 5.0 g X 100 (100 is to get percent) = (1.1 g) / 5.0 g X 100

= 22.0 %

% H2O = ( mass of H20 alone) / (mass of total hydrate)

0.22 = 18.0n / (18.0n + 187.5)

n = 2.9 = (about) 3

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.

it is the most commonly accepted one