Mole Concept — Set 4
Chemistry · मोल संकल्पना · Questions 31–40 of 40
What is the molarity of a solution containing 5.85 g NaCl in 1.0 L of solution? (NaCl = 58.5 g/mol)?
How much 10.0 M stock solution is needed to prepare 250 mL of 1.0 M solution?
At STP, what volume is occupied by 0.75 mol of an ideal gas?
How many molecules are present in 18 g of water (H2O)?
For acid-base reactions, 1.0 M H2SO4 solution is approximately equal to?
How many moles are present in 3.011 × 10^23 molecules of a substance?
What is the mass of 0.20 mol of aluminium atoms? (Al = 27 g/mol)?
For N2 + 3H2 → 2NH3, if 1 mol N2 reacts with 2 mol H2, the maximum NH3 formed is?
The density of a gas at STP is 2.0 g/L. Its molar mass is approximately?
An impure CaCO3 sample of mass 10 g releases 2.2 g CO2 on heating (CaCO3 → CaO + CO2). The percentage purity of CaCO3 is?