A metal M forms a volatile carbonyl complex $M(CO)_x$. 0.525g of this complex is heated in a closed vessel of volume 250 mL at $50^\circ C$. The pressure inside the vessel after complete decomposition of the complex is 746 Torr. If the gas constant R is 0.0821 L atm $K^{-1} mol^{-1}$, what is the value of x in the formula $M(CO)_x$? (Assume the metal M does not contribute significantly to the pressure)

Which of the following describes a 0.5 molal solution?

A 0.5 molal aqueous solution of urea ($CON_2H_4$) is prepared. What is the mole fraction of urea?

What is the mole fraction of the solute in a 1.00 m aqueous solution of glucose?

If 1 kg of solvent contains 2 moles of solute, what is the molality of the solution?

Which concentration term is independent of temperature?

A solution is prepared by dissolving 0.25 moles of glucose in 500g of water. What is the molality of the glucose solution?

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

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

A 1 molal aqueous solution contains 0.5 moles of solute. What is the mass of the solvent (water) in kilograms?

Which of these is the correct formula for calculating molality?