Molar Mass and Mole Conversions Task 1 Calculate the molar mass of each of the following compounds. Show all your working out.

H2O

N2

3) K2SO4

4) Al(OH)3

5) Sr3(PO4)2

Perform the following conversions:
6) Convert 2 moles of C to number of atoms

7) 9.03 x 1023 atoms Fe to moles

8) 2.50 moles H2SO4 to molecules

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.