IGCSE CHEMISTRY SOLVED past paper 0620/23/O/N/23 - October / November 2023 Paper 23

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Cambridge IGCSE Chemistry paper 23 October / November 2023 - (0620_w23_qp_23), Solved and Explained. Hope that everyone find it helpful before their examination !! ヾ( ˃ᴗ˂ )◞ • *♡
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Пікірлер: 24

@annamontana2891 3 ай бұрын

TYSMMM

@RitajAbdo-ju6jb 3 ай бұрын

Thank u🤍

@fearnone0.o Ай бұрын

6:11 in q10, the multiplication that u told doesn’t work with the ions in silver nitrate as it’s a different number (3.01 x 10^24), so what the purpose of the ions in silver nitrate and how did they calculate that?

@raidm1838 Ай бұрын

cuh u just have to multiply the Avogrodas number with the numbers of ions in 1 mole so Avogrodas number * ion in silver nitrate(which are 2 ions) = 1.2 * 10^24 - for 1 mole and for iron oxide avagrodas number * ions in iron oxide (which are 5 ions) = 3.01 * 10^24 this answer is for 1 mole but were looking for 0.25 moles so: 3.01 * 10^24 x 0.25 moles = 7.5 * 10 ^ 23 ez shi

@joy9648 Ай бұрын

@fearnone0.o Ag is one ion, NO3 is another ion (so just multiply Avogadro constant by 2; not 5 like you did)

@fearnone0.o Ай бұрын

@@raidm1838 how does silver nitrate has 2 ions and iron oxide has 5?? how in the world is this possible?? see, it’s AgNO3, so first Ag, second N, third O times 3 as its three times, and in iron oxide, 2 times Fe, and 3 times O, so both have 5 ions… correct me if i’m wrong

@fearnone0.o Ай бұрын

@@joy9648 i see, but why aren’t N and O ions themselves, in NO3??

@joy9648 Ай бұрын

@@fearnone0.o N and O have intramolecular covalent bonds, while NO3 has intermolecular ionic bonds

@funandgaming1551 2 ай бұрын

Will we be provided with the qualitative analysis in the exam?

@funandgaming1551 Ай бұрын

I gave the exam and we were provided with it in the atp

@funandgaming1551 Ай бұрын

From which KZfaq account did you watch the experiment videos?

@fearnone0.o Ай бұрын

no we won’t be provided, it’s only provided in atp

@aaaa-ri8is 18 күн бұрын

q10, you said Fe2O3 has 5 ions in one mol of Fe2O3. then wouldnt it be just 5×0.25?Sorry im confused ive never calculated number of ions before

@aaaa-ri8is 18 күн бұрын

so 1mol has 6.02×10^23 ions or 5 ions??

@DrMonaSeif 18 күн бұрын

1mole has 6.02×10*23 formulas and each formula contain 5 ions

@fearnone0.o Ай бұрын

dr mona, can u pls tell me which metals react with cold water and which metals react with steam, because this reactivity question really confused me 19:49

@DrMonaSeif Ай бұрын

Group one metals react with water to form metal hydroxide and hydrogen gas magnesium reacts with warm water or steam .

@fearnone0.o Ай бұрын

@@DrMonaSeif just magnesium from Group II ??

@Channels208 Ай бұрын

why cant question 35 be B?

@DrMonaSeif Ай бұрын

Because bromine has to be added in 2 adjacent carbons (two carbons that are next to each other ) and that is not happening in ( B)

@Channels208 Ай бұрын

@@DrMonaSeif thanks, is that the rule for most addition reactions?

@xdSloshy Ай бұрын

@@Channels208bromine is added where the double bond breaks so it means it must add across two carbons next to each other . Apply this logic wherever needed.

@Channels208 Ай бұрын

@@xdSloshy thx

@Cypacic Ай бұрын

Are yall having multiple choice in 1.5 hour like i am, if so, good luck yall