Mole Concept: JEE Questions & Solutions

2.8 10^-3 mol of CO2 is left after removing 10^21 molecules from its ‘x’ mg sample. The mass of CO2 taken initially is: Given: NA = 6.02…

0.1 mole of compound S will weigh g, (given the molar mass in g mol^-1 C = 12, H = 1, O = 16):

0.1 mol of the following given antiviral compound (P) will weigh 10^-1 g.

Among 10^-10 g (each) of the following elements, which one will have the highest number of atoms? Element: Pb, Po, Pr and Pt

At the sea level, the dry air mass percentage composition is given as nitrogen gas: 70.0, oxygen gas: 27.0, and argon gas: 3.0. If the…

A 0.05 cm thick coating of silver is deposited on a plate of 0.05 m^2 area. The number of silver atoms deposited on the plate is 10^23 (At.…

When 0.01 mol of an organic compound containing 60 carbon was burnt completely, 4.4 g of CO2 was produced. The molar mass of the compound…

The volume of HCl containing 73 g L^-1, required to completely neutralize NaOH obtained by reacting 0.69 g of metallic sodium with water,…

The energy of one mole of photons of radiation of frequency 2 10^12 Hz in J mol^-1 is. (Nearest integer) Given: h = 6.626 10^-34 Js, NA =…

The number of molecules and moles in 2.8375 litres of O2 at STP are respectively:

Match List I with List II Choose the correct answer from the options given below:

Section – B If the formula of Borax is Na2B4O7.(OH)2, then x + y + z = ? The formula of borax is Na2B4O7.(OH)2

1 g of a carbonate ( M2 CO3) on treatment with excess HCl produces 0.01 mol of CO2. The molar mass of M2 CO3 is