Home
Class 11
CHEMISTRY
A hydrate of magnesium iodide has a form...

A hydrate of magnesium iodide has a formula `Mgl_(2).xH_(2)O.A 1.055 g` sample is heated to a constant weight of `0.695 g`. What is the value of `x` ?

A

`2`

B

`4`

C

`6`

D

`8`

Text Solution

Verified by Experts

The correct Answer is:
D
`(W_("sample"))/(W_("residuce")) = (M_(Mgl_(2).xH_(2)O))/(M_("residuce"(Mgl_(2))))`
`(1.055)/(0.695) = (278+18x)/(278)`
x = 8`
Promotional Banner

Similar Questions

Explore conceptually related problems

A quantity of aluminium has a mass of 54.0 g . What is the mass of the same number of magnesium atoms ?.

Uranium is isolated from its ore by dissolving it as UO_(2)(NO_(3))_(2) and separating it as solid UO_(2)(C_(2)O_(4)).xH_(2)O " "A 1.0 g sample of ore on treatment with nitric acid yielded 1.48 g UO_(2)(NO_(3))_(2) which on further treatment with 0.4 g Na_(2)C_(2)O_(4) yielded 1.23 g " "UO_(2)" "(C_(2)O_(4)).xH_(2)O . Determine weight percentage of uranium in the original sample and x :

The molality of 1 L solution with x% H_(2)SO_(4) is equal to 9. The weight of the solvent present in the solution is 910 g . The value of x is:

Let f(x)=x^(2)+bx+c and g(x)=x^(2)+b_(1)x+c_(1) Let the real roots of f(x)=0 be alpha, beta and real roots of g(x)=0 be alpha +k, beta+k fro same constant k . The least value fo f(x) is -1/4 and least value of g(x) occurs at x=7/2 The roots of g(x)=0 are

f(x)= 3x^(2)-1 and g(x)= 3 + x . If f= g then the value of x is…….

Na_(2)SO_(4).xH_(2)O has 50% H_(2)O . Henxe, x is :

What is no of O_(2) molecules in 3.2 xx 10^(-15)g sample of oxygen ? .