L
lol1234
Guest
Hi
Im having a hard time doing these exercises :
1/ FE03 + ...CO --> ... CO2
b) Iron (III) oxide is reduced to iron in the blast furnace according to the equation completed in part (a) . How much iron (III) is needed to produce 112 g of iron ?
c) How much iron can be made from 320 tonnes of iron (III) oxide?
d) A certain iron ore is impure iron (III) oxide. 320 tonnes of this ore will make 202 tonnes of iron . What is the percentage purity of the iron ore?
And this exercice:
It was found that 25 cm3 of 0.1mol/dm3 sodium hydroxide solution was neutralised by exactly 20cm3of hydrochloric acid. The concentration of the acid was not known.
a) how many moles of sodium hydroxide were there in the experiment?
b) HCl+ NAOH --> NACL + H20
How many moles of hydrochloric were needed to neutralise the sodium hydroxide?
c) What was the concentration of the hydrochloric acid?
Thanks!
Im having a hard time doing these exercises :
1/ FE03 + ...CO --> ... CO2
b) Iron (III) oxide is reduced to iron in the blast furnace according to the equation completed in part (a) . How much iron (III) is needed to produce 112 g of iron ?
c) How much iron can be made from 320 tonnes of iron (III) oxide?
d) A certain iron ore is impure iron (III) oxide. 320 tonnes of this ore will make 202 tonnes of iron . What is the percentage purity of the iron ore?
And this exercice:
It was found that 25 cm3 of 0.1mol/dm3 sodium hydroxide solution was neutralised by exactly 20cm3of hydrochloric acid. The concentration of the acid was not known.
a) how many moles of sodium hydroxide were there in the experiment?
b) HCl+ NAOH --> NACL + H20
How many moles of hydrochloric were needed to neutralise the sodium hydroxide?
c) What was the concentration of the hydrochloric acid?
Thanks!