tuwayz:
making an attempt instead of getting it right won't favour u on dis one because in objectives answering is either u r right or wrong

owk sire!

Halpher:
owk sire!

Yes boss

There are basic particles from which matter could b form except
a molecule
b atom
c ion
d salt

atom is the.......
A smallest part of a substance dat can take part in chemical reaction.
B smallest part a compound that can take part in a chemical change
C smallest part of an element which can take part in a chemical change
D smallest part of a lattice which can take part in a chemical change

atomicity of ozone is
A 1
B 2
C 3
D 4

a molecule is d smallest particle of....
A a matter that can exist in free state
B an element which can exist in free state
C a radical that can exist in free state
D a lattice that can exist in free state

3NH is
3
A three moles of ammonium
B three moles of ammonia
C six moles of ammonia
D six moles of ammonium

the relative atomic mass of calcium is 40 this means
A the mass of calcium is 40
Bthe calcium is 40 times heavier than that of 1 atom of hydrogen
Ccalcium is 40times that of 1g of hydrogen
Dcalcium is related to hydrogen through digit


modern standard element with which chemist define relative atomic mass is
a 12C
b 13C
c 14C
d 3H


the relative molecular mass of lead || trioxinitrateV is(Pb=108, N=14, O=16)
a 170
b 222
c 232
d 132


which one is heavier
a pbd4
bH2
cpb(NO3)2
d none of d above


the percentage of oxygen on sulphur|V oxide is
a 5%
b 50%
c 500%
d 25%

the empirical formula of C6H6 is
A CH
B C3H3
C C6H6
D 3CH
if d relative molecular mass of CH20 is 60 calculate it empirical formular(C=12 H=1 O=16)
A 4
B 1
C 2
D 3


a molecule of neon is
A ionic
B monatomic
C diatomic
D triatomic

Keep it flowing

Likely examination question from chem text book chapter 3

Halpher:
It is A.

what of pcl5?

Kealmin:
1. There are basic particles from which matter could b form except
a molecule
b atom
c ion
d salt

2. atom is the.......
A smallest part of a substance dat can take part in chemical reaction.
B smallest part a compound that can take part in a chemical change
C smallest part of an element which can take part in a chemical change
D smallest part of a lattice which can take part in a chemical change

3.atomicity of ozone is
A 1
B 2
C 3
D 4

4.a molecule is d smallest particle of....
A a matter that can exist in free state
B an element which can exist in free state
C a radical that can exist in free state
D a lattice that can exist in free state

5. 3NH is
3
A three moles of ammonium
B three moles of ammonia
C six moles of ammonia
D six moles of ammonium

6. the relative atomic mass of calcium is 40 this means
A the mass of calcium is 40
Bthe calcium is 40 times heavier than that of 1 atom of hydrogen
C.calcium is 40times that of 1g of hydrogen
Dcalcium is related to hydrogen through digit


7. modern standard element with which chemist define relative atomic mass is
a 12C
b 13C
c 14C
d 3H


8.the relative molecular mass of lead || trioxinitrateV is(Pb=108, N=14, O=16)
a 170
b 222
c 232
d 132


9.which one is heavier
a pbd4
bH2
cpb(NO3)2
d none of d above


10.the percentage of oxygen on sulphur|V oxide is
a 5%
b 50%
c 500%
d 25%

11.the empirical formula of C6H6 is
A CH
B C3H3
C C6H6
D 3CH
12.if d relative molecular mass of CH20 is 60 calculate it empirical formular(C=12 H=1 O=16)
A 4
B 1
C 2
D 3


13.a molecule of neon is
A ionic
B monatomic
C diatomic
D triatomic

1. D
2. A
3. C
4. A
5. B
6. C
7. A
8. C
9. B
10. B
11. A
12. C
13. B

Segipaul:

what of pcl5?

They are still propably on thesame parallel just dat Pcl5 is of more stable compound cos phosphor which is group 5 element has and oxidation num of +3 and +5 and that +5 is kinda stable for them.
So pcl3 is more preferable.

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bro i had 7 points can i apply Delsu med & surg with it?

Halpher:

They are still propably on thesame parallel just dat Pcl5 is of more stable compound cos phosphor which is group 5 element has and oxidation num of +3 and +5 and that +5 is kinda stable for them.
So pcl3 is more preferable.

i mean is pcl5 amphoteric too?

Segipaul:
i mean is pcl5 amphoteric too?

Been stable with d +5 oxidation num,it is neither acidic nor basic but it is a Neutral compound(due to is much stableness).

Kealmin:
There are basic particles from which matter could b form except
a molecule
b atom
c ion
d salt

atom is the.......
A smallest part of a substance dat can take part in chemical reaction.
B smallest part a compound that can take part in a chemical change
C smallest part of an element which can take part in a chemical change
D smallest part of a lattice which can take part in a chemical change

atomicity of ozone is
A 1
B 2
C 3
D 4

a molecule is d smallest particle of....
A a matter that can exist in free state
B an element which can exist in free state
C a radical that can exist in free state
D a lattice that can exist in free state

3NH is
3
A three moles of ammonium
B three moles of ammonia
C six moles of ammonia
D six moles of ammonium

the relative atomic mass of calcium is 40 this means
A the mass of calcium is 40
Bthe calcium is 40 times heavier than that of 1 atom of hydrogen
Ccalcium is 40times that of 1g of hydrogen
Dcalcium is related to hydrogen through digit


modern standard element with which chemist define relative atomic mass is
a 12C
b 13C
c 14C
d 3H


the relative molecular mass of lead || trioxinitrateV is(Pb=108, N=14, O=16)
a 170
b 222
c 232
d 132


which one is heavier
a pbd4
bH2
cpb(NO3)2
d none of d above


the percentage of oxygen on sulphur|V oxide is
a 5%
b 50%
c 500%
d 25%

the empirical formula of C6H6 is
A CH
B C3H3
C C6H6
D 3CH
if d relative molecular mass of CH20 is 60 calculate it empirical formular(C=12 H=1 O=16)
A 4
B 1
C 2
D 3


a molecule of neon is
A ionic
B monatomic
C diatomic
D triatomic

1. D
2. A
3. C
4. A
5. B
6. B
7. A
8. C
9. A
10. B
11. A
12. C
13. A
pls correct me if i'm wrong

smartdave1:

bro i had 7 points can i apply Delsu med & surg with it?

not @ all...u need ä minimum of 12p

tunzkid:
not @ all...u need ä minimum of 12p

hmmm
but, like what can that score fetch me?

Umartins1:


I remain on my two tentacles to support my claims.

Has is singular, had is plural. Have is the past tense of both.

Seun Osewa had verified his account.

Seun Osewa have clarified his account.


Which is correct if I'm referring to the past?

none

Kealmin:
There are basic particles from which matter could b form except
a molecule
b atom
c ion
d salt

atom is the.......
A smallest part of a substance dat can take part in chemical reaction.
B smallest part a compound that can take part in a chemical change
C smallest part of an element which can take part in a chemical change
D smallest part of a lattice which can take part in a chemical change

atomicity of ozone is
A 1
B 2
C 3
D 4

a molecule is d smallest particle of....
A a matter that can exist in free state
B an element which can exist in free state
C a radical that can exist in free state
D a lattice that can exist in free state

3NH is
3
A three moles of ammonium
B three moles of ammonia
C six moles of ammonia
D six moles of ammonium

the relative atomic mass of calcium is 40 this means
A the mass of calcium is 40
Bthe calcium is 40 times heavier than that of 1 atom of hydrogen
Ccalcium is 40times that of 1g of hydrogen
Dcalcium is related to hydrogen through digit


modern standard element with which chemist define relative atomic mass is
a 12C
b 13C
c 14C
d 3H


the relative molecular mass of lead || trioxinitrateV is(Pb=108, N=14, O=16)
a 170
b 222
c 232
d 132


which one is heavier
a pbd4
bH2
cpb(NO3)2
d none of d above


the percentage of oxygen on sulphur|V oxide is
a 5%
b 50%
c 500%
d 25%

the empirical formula of C6H6 is
A CH
B C3H3
C C6H6
D 3CH
if d relative molecular mass of CH20 is 60 calculate it empirical formular(C=12 H=1 O=16)
A 4
B 1
C 2
D 3


a molecule of neon is
A ionic
B monatomic
C diatomic
D triatomic

(1) D
(2) C
(3) C
(4) B
(5) B
(6) B
(7) A
( Pb(NO3)2 =
(108x0)+(14x0+16x3)2 =
(108+(14+48)2 =
108+(62)2 =
108+124 =232 (C)
( B
(9) C
(10)D
(11) B (no relative atomic number provided)
(12) CH2O
C=12/60 =0.2 =0
H2 = 2/60 =0.03 = 1
O = 16/60 = 0.3 = 0
Ans = 1(B)
(13) B

smartdave1:

hmmm
but, like what can that score fetch me?

u can have microbiology A̶̲̥̅πϑ biochemistry,bontany,chemistry,zoology A̶̲̥̅πϑ anatomy

tunzkid:
u can have microbiology A̶̲̥̅πϑ biochemistry,bontany,chemistry,zoology A̶̲̥̅πϑ anatomy

thank you bro

Hey guys gudmuni i could not make it online again yesterday night....for dose dat answer my question i will give d correction later tanks....am busy na

gudmuni guys blaze up for today chem questions chapter 4

In the formation of anti-knock agent lead iv tetraethyl(pb(C2H5)4 which of the following element is use??
A)Na
B)pb
C)C
D)none
E)a and b

1D
2C
3C
4B
5B
6B
7A
8C
9D
10B
11A
12C
13B

Halpher:
In the formation of anti-knock agent lead iv tetraethyl(pb(C2H5)4 which of the following element is use??
A)Na
B)pb
C)C
D)none
E)a and b

lead is use because it increase d octane rating of d fuel making it a branch chain hydrocarbon

guys i can see sometin iteresting coming up tonight

The equivalent of kgms^-1 is what?

thank u very much.i was confused becos of the unit ,cal.

chimhigher:

No 2...d magnitude wuld b Mgsin@ = 30*10*sin30=300sin30= 150N

ok seriously I don't get this solution..why didn't u use 50N in the soln nd we were not told it was sin 30 so hw did u knw its sin 30..lastly, this @ wat dos dat min in phySics cos I have never seen dat b4..lest i forget, is d 10 there cos of d g(acc due to gravity)?

c.electron

Movement of Electrons

mathefaro:
First and foremost, convert the average velocity to m/s by multiplying by 5/18
==> v = 54 * 5/18 = 15m/s;
Then recall that distance = average velocity * time taken i.e. S = vt
S = ?; v = 15m/s; t = 10s
Therefore, S = 15 * 10 = 150m


Since the car started from rest, initial velocity, u = 0, v = 30m/s; t = 6a; a = v/t = 30/6 = 5m/s²; S = ?
So with the available parameters, S, u, a and t, the appropriate equation to use is S = ut + (1/2)*at²;
Therefore, S = 0(6) + 0.5*5*36
S = 0+ 90
S = 90m


V - U = 5m/s; t = 30s; U = 20m/s;
a = (V - U)/t = 5/30 = 1/6m/s²
S =ut + ½at²
S = 20(30) + ½*1/6*30*30
==> S =600 + 75
==> S = 675m

u = 50m/s; v = 0; t = ?, g = 10m/s²
=> V = u - gt (minus because the body is going up against gravity)
=> 0 = 50 - 10t
=> 10t = 50
=> t = 5s

Good morning lovely people

although I understand all ur soln but for d no 1 I want to knw y u divided by 5/18 inorder to convert to m/s. For no 2 I want to knw y we can't just solve straight by usin d=vt cos if I use dz formular I wil get 180 rada dan 90. Nd 4 no 4 whr did u arrive at d formula v=u-gt..thanx

Update resume later

Kealmin:

lead is use because it increase d octane rating of d fuel making it a branch chain hydrocarbon

The ansa is E.