If the mole fraction of ethanol in a solution made by mixing $x \ g$ of water and $69 \ g$ of ethanol is $0.6$,then $x = \dots \dots \dots \dots$

When equal volumes of $0.1 \ M \ AgNO_3$ and $0.2 \ M \ NaCl$ are mixed,the concentration of $NO_3^-$ in the resulting mixture will be ............. $M$.

The mole fraction of the solute in a $1 \ m$ (molal) aqueous solution is:

Which of the following statements is correct?
$(1)$ Molarity is the number of moles of solute in one liter of solution.
$(2)$ The normality and molarity of a sodium carbonate solution are the same.
$(3)$ The number of moles of solute dissolved in $1000 \ g$ of solvent is defined as molality $(m)$.
$(4)$ The ratio of the mole fractions of solute and solvent is equal to the ratio of their respective moles.

Define the following modes of expressing the concentration of a solution: Mass percentage,Molarity,Molality,and Mole fraction. Which of these modes are independent of temperature and why?

In one molal solution that contains $0.5 \ mol$ of a solute,there is