Mole Concept: JEE Questions & Solutions

2.8 × 10⁻³ mol of CO₂ is left after removing 10²¹ molecules from its ‘x’ mg sample. The mass of CO₂ taken initially is: Given: N_A = 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 (nearest integer). (Given: molar mass in g mol⁻¹ — H: 1, C: 12,…

Among 10⁻⁹ 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 m² area. The number of silver atoms deposited on the plate is × 10²³ (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, is…

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

Match List I with List II | LIST I | LIST II | |---|---| | (A) 16 g of CH₄(g) | (I) Weight 28 g | | (B) 1 g of H₂(g) | (II) 60.2 × 10²³…

1 g of a carbonate (M₂CO₃) on treatment with excess HCl produces 0.01 mol of CO₂. The molar mass of M₂CO₃ is g mol⁻¹ (Nearest integer).