Alevel chem reacting mass calc. HELP!
page 23. https://www.scienceskool.co.uk/uploads/9/5/5/0/9550437/[02]_amount_of_substance.pdf
i've done question 5bi and got 176 moles which is right.
i'm stuck on part bii) mark scheme says to do 176 x 46 to give mass and then times by 0.8
i'm so confused why they did this. i thought first you divide 176 by 2 and then x 46 and times by 0.8
help would be appreciated, thank you
i've done question 5bi and got 176 moles which is right.
i'm stuck on part bii) mark scheme says to do 176 x 46 to give mass and then times by 0.8
i'm so confused why they did this. i thought first you divide 176 by 2 and then x 46 and times by 0.8
help would be appreciated, thank you
Original post by MedApplicantttt
page 23. https://www.scienceskool.co.uk/uploads/9/5/5/0/9550437/[02]_amount_of_substance.pdf
i've done question 5bi and got 176 moles which is right.
i'm stuck on part bii) mark scheme says to do 176 x 46 to give mass and then times by 0.8
i'm so confused why they did this. i thought first you divide 176 by 2 and then x 46 and times by 0.8
help would be appreciated, thank you
i've done question 5bi and got 176 moles which is right.
i'm stuck on part bii) mark scheme says to do 176 x 46 to give mass and then times by 0.8
i'm so confused why they did this. i thought first you divide 176 by 2 and then x 46 and times by 0.8
help would be appreciated, thank you
why are you dividing 176 by 2?
Original post by lukeb44
why are you dividing 176 by 2?
isn't it because the moles of NO go from 4 in 1st reaction to 2 in 2nd reaction?
Original post by MedApplicantttt
isn't it because the moles of NO go from 4 in 1st reaction to 2 in 2nd reaction?
No , thats the stoichiometry which is just the molar ratio in which things react. You're not necessarily forming 4 moles in the first reaction its just 4 moles compared to the others if that makes any sense. That same amount of moles then reacts with the next reaction in a different stoichiometry
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