133.3 cm3
85 cm3
75 cm3
65 cm3
58.3 cm3
Correct answer is C
P1 = 750MHg V1 = 100cm3 l2 = 308k
P2 = 100 mmHg V2 = ?
But (P1V1)/(T1) = ((P2V2)/(T2) i.e (750 x 100)/(308) = (1000 x )/(V2)/(308)
V2 = (750 x 1000 x 308)/(308 x 1000) = 75 cm3
CH4
C2H2
C2H4
C2H6
C3H8
Correct answer is C
% of H2 = 14.29
% of C = 85.71
Divided by At wts
For H = (14.29)/(1) = 14.29
For C = (85.71)/(12) = 7.14
Dividing by smallest number we have the following:
For H (14.29)/(7.14) = 2
For C = (7.14)/(7.14) = 1
Emperical formula of the comp = CH2
wt of hydride taht will occupy 22400 cm is 22400 x 0.7
56 = 28 = mole wt of hydride
X(CH2) = 28
X(12 + 2) = 28 i.e 14x = 28x = 2
The formula of hydrocarbon is therefore C2H4
0.02
0.16
0.20
0.25
20
Correct answer is D
H2 = 20cm
O2 = 35cm
N2 = 10cm
CO = 15cm
Total vol = 80cm
Mole fraction of H2 = (20)/(80) = 0.25
The general formula of an alkyl halide (which represent the halide) is?
CnH2n - 2X
CnH2n + 1X
CnH2n + 2X
CnH2nX
CnH2n - 1
Correct answer is B
No explanation has been provided for this answer.
An efflorescent compound is a substance that?
absorbs water froom the air without dissolving in it
is capable of giving off coloured luminosity
gives out water to the atmosphere
absorbs water from the air and dissolves in it
gives out its water of crystallization on heating
Correct answer is C
Efflorescence is a phenomenon where a crystalline salt loses all or part of its water of crystallization when exposed to the atmosphere to form a lower dehydrate or an anhydrous salt.