Question

Solution

Correct option is

Fe2O3

Empirical formula mass of Fe2O3  Hence, molecular formula is same as empirical formula, viz., Fe2O3.

SIMILAR QUESTIONS

Q1

1.520 g of hydroxide of a metal on ignition gave 0.995 g of oxide. The equivalent weight of the metal is

Q2

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

Q3

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

Q4

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

Q5

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

Q6

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

Q7

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

Q8

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.

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 total number of electrons in one molecule of carbon dioxide is