Re: How do you calculate the molar mass? « Reply #3 on: February 18, 2008, 01:18:53 PM » you have 8 parts of H20, the molar mass of H20 is 18, simply multiply 8 with 18 and add to the rest of the mass « Last Edit: February 18, 2008, 01:30:27 PM by Tomce »...
Calculate the molar heat capacity of water. The specific heat of water is 4.18 J/(gC). How do you determine the specific heat in a closed container? Calculate the specific heat capacity of the unknown metal in J/xK. [ U n k n o w n m e t a l ] i. Mass of metal: 33.996g ...
Is this referring to the solution or just the water? If it is referring to the solution, would the mass be 75.0g? q(soln)=m(soln)cΔT =75.0 x 4.184 x (27.21-25) =693.5J =0.6935kJ q(rxn)= -0.6935kJ ΔH=-0.6935kJ I also struggled to find the moles. What moles do I find?
x H_2O has a molar mass of 250.0 g/mol. 2.545 g of hydrate is heated and 63.85% of the residue is found after heating. a) Determine the value of Determine the percent by mass of water in your sample of hydrated copp...