Question

In: Chemistry

5. How many moles of sulfide atoms are there in 1 mole of Fe2(SO4)3? 6. What...

5. How many moles of sulfide atoms are there in 1 mole of Fe2(SO4)3?

6. What is the formula of Calcium Ion?

7. What is the formula for magnesium nitrate?

8. What is the molecular weight of Ca3(PO4)2 to the nearest whole number?

Expert Solution

Solution :-

5. How many moles of sulfide atoms are there in 1 mole of Fe2(SO4)3?

Solution :- 1 mol Fe2(SO4)3 contains 3 moles of SO4^2- ions

So moles of sulfate ions that are present in the 1 mole Fe2(SO4)3 are 3 moles

6. What is the formula of Calcium Ion?

Solution :- Calcium is group 2 element it has 2 valence electrons so it forms the cation with +2 charge as

Ca^2+

7. What is the formula for magnesium nitrate?

Solution :- Formula of magnesium sulfate is MgSO4

8. What is the molecular weight of Ca3(PO4)2 to the nearest whole number?

Solution :- molecular weight is the sum of atomic masses of the elements in the formula

Therefore

Molecule weight for the Ca3(PO4)2 is calculated as follows

Molecular wt = (Ca*3) + ( P*2)+(O*8)

= (40.078 *3) +(30.974 *2)+(16*8)

= 310 g/mol

queen_honey_blossom answered 2 years ago

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