Question

A compound M.xH2O contains 40 mass % of water .if the molar mass of M is 189 g mol ^-1 , the value of x will be how much?

Answer 1

Answer:

refer to the attachments

Sample Problems. The equation x = 5 has only one solution: the number 5. The equation z2 = 4 has two solutions: z = 2 and z = -2. The equation x = x has infinitely many solutions: any value of x will work, since x is always equal to itself.

Answer 2

Answer:

Explanation:

"The obtained balanced chemical equation for the reaction of both the chemicals: oxygen and hydrogen are given in the question itself.

So the correct answer will be as follows:

-> 2h2O + O2----> 2ho2

The ratio will be 2:1= 2

The moles of H2 will be = 0.253 moles.

Therefore the number of hydrogen atoms needed may be around 0.253 moles.

Hope this answer helped you. "