Question

 

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.

Solution

Correct option is

 

Pressure is the force (i.e., weight) acting per unit area

But weight = mg

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

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 total number of electrons in one molecule of carbon dioxide is