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IGCSE CHEMISTRY SOLVED past paper 0620/23/O/N/22 - October / November 2022 Paper 23

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Dr. Mona Seif

Dr. Mona Seif

Күн бұрын

Пікірлер: 12
@Saira-uu4xr
@Saira-uu4xr Жыл бұрын
Thank you for posting these videos :))
@saltii6354
@saltii6354 5 ай бұрын
For number 20, why is C not right? Isn't another part of equilibrium is that concentrations of reactants and products are no longer changing?
@DrMonaSeif
@DrMonaSeif 5 ай бұрын
No longer changing means they became constant but not equal
@saltii6354
@saltii6354 4 ай бұрын
@@DrMonaSeif OHHH 🤦‍♀️ Thank you 😭
@velocissaraptor
@velocissaraptor 3 ай бұрын
mam, for question 9. it was 2H2S, shouldn't we multiply Mr of H2S with 2?
@DrMonaSeif
@DrMonaSeif 2 ай бұрын
(Mr )is the mass of one mole
@rimasasmr614
@rimasasmr614 Жыл бұрын
In question 9 the second step why do we divide by 2 ?
@DrMonaSeif
@DrMonaSeif Жыл бұрын
Because the ratio is 2 ( H2S) : 3 (O2), so to get the number of moles of oxygen you cross multiply, in other words multiply by 3 then divide by 2.
@rimasasmr614
@rimasasmr614 Жыл бұрын
@@DrMonaSeif OOOOH OKAY THANK YOUUU
@reemtaher9623
@reemtaher9623 6 ай бұрын
in q 39 why didnt we choose A
@janjoonnnnnnnn
@janjoonnnnnnnn 4 ай бұрын
the extension bonds are formed where the double bond breaks and we cant just rearrange the structure. one extension bond extends from the middle C and the other from the furthermost carbon to the right
@fearnone0.o
@fearnone0.o 2 ай бұрын
@@janjoonnnnnnnnit can’t be explained by words😂
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