Which of the following methods is NOT suitable for concentrating a protein solution?

A standard solution is one whose :

In the reaction, ${\rm{VO}} + {\rm{F}}{{\rm{e}}_2}{{\rm{O}}_3} o {\rm{FeO}} + {{\rm{V}}_2}{{\rm{O}}_5}{\rm{.}}$. The eq.wt. of ${{\rm{V}}_2}{{\rm{O}}_5}$ is equal to its :

Which of the following physical properties of a metal is significantly affected by changes in temperature?

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?

Which of the following properties of a substance is directly influenced by temperature?

If we dissolve 20g of NaOH in 200ml of water, what will be the mass percentage of NaOH in the solution (assuming the density of water is 1g/ml)?

In a solution containing 0.1 moles of a solute and 5 moles of solvent, what is the mole fraction of the solvent?

100 mL of 0.1 M solution of a reductant is diluted to 1 litre, which of the following changes?

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