100g of a liquid A (molar mass 140 g/mol) and 100g of liquid B (molar mass 70 g/mol) form an ideal solution. What is the mole fraction of B in the vapor phase? (Assume $P^0_A = 70$ mmHg and $P^0_B = 140$ mmHg)

Which method is employed for concentrating sulfide ores?

What is the molarity of a solution containing 1 mole of solute in 500 mL of solution?

Which of these is the correct formula for calculating molality?

In the leaching of alumina from bauxite, the concentration of the ore is achieved by:

Which of the following is used as a depressant in the froth flotation process for separating ZnS and PbS?

Molality is defined as the number of moles of solute per:

Chromite ore is concentrated by:

A solution is prepared by dissolving 0.5 moles of solute in 250 g of solvent. What is the molality of the solution?

If 20 g of solute is dissolved in 80 g of solvent, what is the mass percentage of the solute?

What is the unit of molarity?