The number of oxygen atoms in 4.4gm of CO2 is
1.2 × 1023
6 × 1022
6 × 1023
12 × 1023
A.
1.2 × 1023
Molar mass of CO2 = 12 + 32 = 44
= 0.1 × 6 × 1023 = 6 × 1022
(Since, each CO2 contains two oxygen atoms)
N(oxygen) = 2 × 6 × 1022 = 1.2 × 1023
0.30 g of an organic compound containing C, H and oxygen on combustion yields 0.44 g of CO2 and 0.18 g of H2O. If one mole of compound weighs 60, then molecular formula of the compound is
CH2O
C3H8O
C4H6O
C2H4O2
An organic compound contains C = 40%, H = 13.33% and N = 46.67%. Its empirical formula is
C2H2N
C3H7N
CH4N
CHN
The mass of BaCO3 produced when excess CO2 is bubbled through a solution of 0.205 mole Ba(OH) is :
81 gm
40.5 gm
20.25 gm
162 gm
A compound contains 54.55% carbon, 9.09% hydrogen, 36.36% oxygen. The empirical formula of this compound is:
C3H5O
C4H8O2
C2H4O2
C2H4O
What is the effect of having the pressure by doubling the volume on the following system at 500°C?
H2 (g) + I2 (g) 2HI (g)
Shift to reactant side
Shift to product formation
Liquefaction of HI
No effect
The number of coulombs required to reduce 12.3 g of nitrobenzene to aniline is :
115800 C
5790 C
28950 C
57900 C
The strength in volumes of a solution containing 30.36 g/L of H2O2 is:
10 volume
20 volume
5 volume
None of these
Which of the following concentration units is independent of temperature ?
Normality
Molarity
Formality
Molality