The diagram illustrates the formation of water. the illustration represents which sequence of events?
a) h2 (element) + o2 (element) → h2o (element)
b) h2 (element) + o2 (element) → h2o (compound)
c) h2 (compound) + o2 (compound) → h2o (element)
d) h2 (compound) + o2 (compound) → h2o (compound)

a solution of cuso4 is labelled 0.01 m. how much cuso4 in grams, must be used to make 1 liter of solution?
a) 1.120 g
b) 1.595 g
c) 1.6 g
d) 15.0 g

Thus, hydrogen and oxygen that is and are elements as they are made up of entirely one type of atom.

Pure substance which is made up of two or more different elements combine in a fixed ratio  are known as compounds. They can be separated into smaller substances.

Thus, water that is is a compound as it is made up of two or more different elements.

Hence, option B is correct that is:

   -(1)

Molar mass of =

Molarity = (given)

Volume of solution = (given)

Substituting the formula of number of moles of solute in molarity formula:

Substituting the values:

Hence, option B is correct.

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)