Moles calculations - Answers

QU - INDEX

1)                 Write the formula of:

a)     sodium hydroxide      NaOH

b)     iron (III) nitrate        Fe(NO3)3

c)      copper (II) oxide        CuO

d)     manganese (IV) Sulphate    Mn(SO4)2

 

2)                 Write the formula of:

a)     iron (III) nitrate Write an equation, including state symbols, for the reaction of magnesium nitrate solution and sodium hydroxide solution. 

b)     Write an ionic equation for the above reaction.  

 

3)                 What is the mass of:

a)     2.0 mole of oxygen (O2)

b)     0.1 mole copper sulphate (CuSO4.5H2O)

 

4)                 How moles of particles are in:

a)     4.14g of lead (Pb)

b)     2.12g of sodium carbonate (Na2CO3)

 

5)                 Complete the following equation.  Add the appropriate state symbols

 

FeSO4 + NaOH -->      

 

6)         How many atoms are present in 1g of helium?

 

7)         Look at the following reaction:  A student used 5.6g of iron and an excess of Sulphuric acid

 

Fe(s) + H2SO4(aq) --> FeSO4(aq) + H2(g)

 

a)     What is the maximum mass of iron (II) sulphate formed?

b)     What is the volume of hydrogen formed?