Multiple Choice Answers (2 Viewers)

[ramanij]

what did everyone fink of chem hard, ezy, ok? i found that there was too much skill-based questions

 

[joca187]

It seems that every has put 9A as the answer, but since the empirical formula means that 1 - 1 - 1 - 1, it means that a maximum of 0.66g of Ozone can react with the NO, therefore 0.66g/30 - which is the molar mass of NO, x22.71 equals 0.5L. thats how I interpreted it anyway

 

[mazza_728]

if those are right i got 15/15 also which i would love dont get my hopes up guys... i cant take anymore let downs!! i got 15/15 right? ...right guys? ..........guys? awww not again

 

[mervvyn]

It seems that every has put 9A as the answer, but since the empirical formula means that 1 - 1 - 1 - 1, it means that a maximum of 0.66g of Ozone can react with the NO, therefore 0.66g/30 - which is the molar mass of NO, x22.71 equals 0.5L. thats how I interpreted it anyway

Explanation of 9 and why it is (A):

0.66g NO is 0.022 mol
0.72g O3 is 0.015 mol

given that it is 1-1-1-1, ozone is the limiting reagent
therefore 0.015 mol of NO2 produced * 22.71 = 0.34L --> A

 

[Gesus]

It seems that every has put 9A as the answer, but since the empirical formula means that 1 - 1 - 1 - 1, it means that a maximum of 0.66g of Ozone can react with the NO, therefore 0.66g/30 - which is the molar mass of NO, x22.71 equals 0.5L. thats how I interpreted it anyway

Yeah, this was pressed so hard by my teachers in yr11, in chemistry, only moles can be compared, not mass

 

[mervvyn]

I thought I'd put in the rest of my multi for the fun... I think it's 14/15, correct me if thats wrong.

1 A
2 A
3 B
4 B
5 C
6 D
7 D
8 D
9 A
10 C
11 A
12 C
13 C
14 A ( I'm pretty sure it should be D)
15 B

 

[Eagles]

wrote 'a' instead of 'b' for 15...

good bye 100% in MC

 

[nemo-42wy]

1) A
2) A
3) B
4) A (but i know it's wrong now. what's an allotrope?)
5) C
6) C
7) D
8) Can't remember but know i got it wrong
9) A
10) C
11) A
12) C
13) C
14) D (total guess!)
15) A (stupid, stupid mistake!)

Good luck peoples in the rest of all your exams!!!

 

[beccabum]

ohhhh i feel so dumb! I think I only got about 10, after looking over the qs and from reading all your answers. For shits + giggles, here they are:
1A
2C (whoops)
3B
4B
5D ??
6D
7D
8D
9D
10A
11A
12B (total guess)
13A
14C
15B or C, can't remember, I guessed it

Hope you guys went ok in everything
best of luck in all your other subjects

 

[lucyinthehole]

yeah i got 10 bah.... isomers/allatropes.... who knows what they are? anyone with 5 braincells, that's who!!! how could i forget??

 

[mushroom_head]

can someone come up with answers we can all agree on?

 

[alex tonkin]

i know these ones are correct...

1.a
2.a
3.b
4.b
5.c
6.d
7.d
8.d
9.
10.c
11.a
12.
13.
14.d
15.b all of my mates answers seemed to vary on the calculation ones and wat the fuck was 12?

 

[martian_man86]

heres mine:

1a
2a
3b
4b
5c
6d
7d
8d
9a
10c
11a
12 i put c, but im not 100% sure...im pretty sure the ammonium ion has a coordinate covalent bond
13c
14d
15b

 

[NeRdY]

1. A
2. A
3. B
4. B
5. C
6. D
7. D
8. D
9. D
10. C
11. A
12. C
13. B (my answers didnt match up to any so guessed)
14. D
15. B

 

[crazed_fairy]

q5 is c coz it asked wats davy's theory, not the current theory. he was the dude that sed acids must have hydrogen

 

[GirlGoneMad]

1a
2a
3c
4b
5a
6d
7d
8d
9b
10c
11a
12b
13a
14a
15b

They are mostly wrong and some I didn't remember so I just guessed what i had chosen.