Answer to Question #260963 in Organic Chemistry for Fariha

Question

 How many moles of sodium sulphite are in the 2.67g?

2. How many molecules of potassium acetate are in 4.55mol?

3. What is the mass of 1.76 x 1024 molecules of calcium phosphide?

4.  a. How many molecules of aluminum hydroxide are in 2.45 mol?

     b.  How many atoms of oxygen are in 2.45mol of aluminum hydroxide?

5.  What is the %mass of hydrogen in ammonium sulphate?

6.  What is the % composition of dinitrogen tetrachloride?

7.  What is the empirical formula of a compound made from 60% magnesium and 40% oxygen?

8.  What is the empirical formula of a molecule whose percent composition is 21.6% sodium, 33.3% chlorine, and 45.1% oxygen?

Answer 1

1)336.42g

2)2.74×10 ^{24} molecules

3)531.97g

4)1.476×10 ^{24} molecules

5)%Mass =16%Nitrogen

6)% composition=26.9%

7)Emprical Formula =MgO

8)Emprical Formula =NaClO3