Calculate the average atomic mass of Mg using the followinf data:
`{:(,"% Natural Abudance","Molar mass "),(25^(Mg),80,24),(25^(Mg),10,25),(26^(Mg),10,26):}`

Calculate the average atomic mass of hydrogen using the following data : {:("Isotope","% Natural abudance mass","Atomic mass(amu)"),(.^(1)H," "99.985," "1),(.^(2)H," "0.015," "2):}

Calculate the atomic mass (average) of chlorine using the following data: {:(,,"% natural abundance",,"Molar mass"),(.^(35)Cl,,75.77,,34.9689),(.^(37)Cl,,24.23,,36.9659):}

Calculate the mass in gm of 2g atom of Mg-

Calculate the mass in g of (a) 2 g -atom of Mg (b) 3N atoms of Mg .

Calculate the equivalent energy for 15 mg of mass.

Calculate the mass of Mg (atomic mass = 24 g'mol) that combines with 1.5 mol of O_2 to form magnesium oxide (MgO)

Calculate the number of gold atoms in 300 mg of a gold ring of 20 carat gold (atomic mass of gold = 197, pure gold is 24 carat).

In a periodic table, the averge atomic mass of magnesium is given as 24.312 u . The average value is based on their relative natural abundance on earth. The three isotopes and their masses are ._12Mg^(24) (23.98504u) , ._(12)Ng^(25) (24.98584) and ._12Mg^(26) (25.98259 u) . The natural abundance of ._12Mg^(24) is 78.99% by mass. Calculate the abundances of the other two isotopes.