When `CaSO_(4)`.`nH_(2)O` is heated, all of the water is driven off. If `34.0g` of `CaSO_(4)` (M.mass`=136`) is formed from `43.0g` of `CaSO_(4).nH_(2)O`, what is the value of `n`?

When (NH_(4))_(2)Cr_(2)O_(7) is heated, the gas evolved is

A mixture of CuSO_(4).5H_(2)O and MgSO_(4).7H_(2)O was heated until all the water was driven off If 5.0g of mixture gave 3g of anhydrous salts, what was the percentage by mass of CuSO_(4).5H_(2)O in the original mixture :

What is the value of x in CaSO_(4).x H_(2)O , gypsum ?

The chemical formula of plaster of paris is CaSO_(4).2H_(2)O

The formula of gypsum and plaster of paris are CaSO_(4).XH_(2)O and CaSO_(4).(Y)/(2)H_(2)O respectively. Find the value of x+y .

What mass of P_(4) O_(10) will be produced by the combustion of 2.0 g of P_(4) with 2.0 g of O_(2)

The nitrogen compound formed when (NH_(4))_(2)SO_(4) is heated is

If the solubility of CaSO_(4) in H_(2)O is 10^(-5)M , Calculate the solubility in 0.005M solution of H_(2)SO_(4) .

Concrete is produced form a mixture of cement, water and small stones. Small amount of gypsum, CaSO_(4).2H_(2)O is added in cement production to improve the subsequent hardening of concrete. The elevated temperature during the production of cement may lead to the formation of unwanted hemihydrate CaSO_(4)(1)/(2)H_(2)O according to reaction. CaSO_(4)2H_(2)O(s) rarr CaSO_(4)(1)/(2)H_(2)O(s)+(3)/(2)H_(2)O(g) The Delta_(f)H^(Theta) of CaSO_(2).2H_(2)O(s),CaSO_(4)(1)/(2)H_(2)O(s),H_(2)O(g) are -2021.0 kJ mol^(-1), -1575.0 kJ mol^(-1) and -241.8 kJ mol^(-1) , respectively. The respective values of their standard entropies are 194.0, 130.0 and 188.0 J K^(-1)mol^(-1) . The values of R = 8.314JK^(-1)mol^(-1) = 0.0831L bar mol^(-1)K^(-1) . Answer the following questions on the basis of above information. Heat change occurring during conversion of 1kg of CaSO_(4).2H_(2)O(s) (molar mass 172g mol^(-1)) of CaSO_(4)(1)/(2)H_(2)O(s) is equal to

0.5 mole of H_(2)SO_(4) is mixed with 0.2 mole of Ca(OH)_(2) . The maximum number of mole of CaSO_(4) formed is: