Question

Solution

Correct option is

22

In a neutral atom, atomic number represents the number of protons inside the nucleus and equal number of electrons around it. Therefore, the number of total electrons in molecule of CO2

= electrons present in one carbon atom

+2 × electron present in one oxygen atom.

= 6 + 2 × 8 = 22.

SIMILAR QUESTIONS

Q1

The number of g-atom of oxygen in CO molecules is

Q2

500 mL of NH3 contain molecules at S.T.P. How many molecules are present in 100 mL of CO2 at S.T.P.?

Q3

In the reaction, 4 NH3 + 5 O2 → 4 NO + 6 H2O,

when one mole of ammonia and one mole of oxygen are made to react to completion, then

Q4

An unknown element forms an oxide. What will be the equivalent weight of the element if the oxygen content is 20% by weight?

Q5

A metal M of equivalent mass E forms an oxide of molecular formulaMxOy. The atomic mass of the metal is given by the correct equation

Q6

Which of the following methods of expressing concentration are independent of temperature?

Q7

Pressure is determined as force per unit area of the surface. The S.I unit of pressure, pascal, is as shown below:

1Pa = 1 Nm–2

If mass of air at sea level is 1034g cm-2, calculate the pressure in pascal.

Q8

Determine the molecular formula of an oxide of iron in which the mass percent of iron and oxygen are 69.9 and 30.1 respectively. Given that the molar mass of the oxide is (Atomic mass: Fe = 55.85, O = 16.00 amu)

Q9

A gaseous mixture contains oxygen and nitrogen in the ratio of 1:4 by weight. Therefore, the ratio of their number of molecules is

Q10

The largest number of molecules is in