I have trouble in Stoichometry!

[MojoJojo]

I've seen that in my school exams i always get the stoichometry QS wrong. Does anyone else think of them as hard? and if you do do you have any tips for me ?

 

[CaptainDanger]

https://www.xtremepapers.com/community/threads/help-any-stoichiometry-note-please-urgent.17023/

http://www.xtremepapers.com/revision/gcse/chemistry/stoichiometry.php

http://www.sparknotes.com/chemistry/stoichiometry/stoichiometriccalculations/

 

[robinhoodmustafa]

I've seen that in my school exams i always get the stoichometry QS wrong. Does anyone else think of them as hard? and if you do do you have any tips for me ?

If u post the question. I could help u by step.

 

[amerfarooq]

I've seen that in my school exams i always get the stoichometry QS wrong. Does anyone else think of them as hard? and if you do do you have any tips for me ?

Practice, practice and practice some more. Do past papers, read the book, read notes etc. If you still can't grasp the concept, try again. When I first started moles, I didn't get anything. I tried again and again and eventually my understanding of the chapter became so good that I don't even touch it for my mid-terms or finals.

 

[MojoJojo]

If u post the question. I could help u by step.

(SANDSTONE contains sand(mainly silicon dioxide) and calcium carbonate)
Excess sandstone was reacted with dilute hydrochloric acid.
CaCO3+2HCL------CaCL2+CO2+H2O
10g of sandstone was added to excess hydrochloric acid. The total mass lost was 0.88g. Calculate the percentage by mass of calcium carbonate in the sand stone.

If u post the question. I could help u by step.

AND ALSOO
Nitrogen dioxide is converted to nitric acid.
4NO+H2O+3O2-----4HNO3
calculate the maximum mass of nitric acid which can be made from 720dm3 of nitrogen(ii)oxide, NO,at room temperature and pressure.