If the density of a $2 \ M$ solution of ethylene glycol in water is $1.11 \ g/mL$, the molality (in $m$) of the solution is approximately

$6 \ g$ of urea (molar mass $= 60 \ g \ mol^{-1}$) and $9 \ g$ of glucose (molar mass $= 180 \ g \ mol^{-1}$) were dissolved in $35 \ g$ of water. The mass percent of urea and glucose is respectively:

Which of the following statements is true?
$(1)$ $200 \ mL$ of $0.2 \ M \ NaOH$ has the same number of moles of solute as $1000 \ mL$ of $1 \ M \ NaOH$.
$(2)$ $200 \ mL$ of $1 \ M \ NaOH$ has the same number of moles as $1000 \ mL$ of $0.2 \ M \ NaOH$.
$(3)$ $100 \ mL$ of $0.2 \ M \ NaOH$ has the same number of moles as $1000 \ mL$ of $1 \ M \ NaOH$.
$(4)$ $2000 \ mL$ of $0.2 \ M \ NaOH$ has the same number of moles as $1000 \ mL$ of $1 \ M \ NaOH$.

$100 \ g$ of solute is dissolved in $1400 \ g$ of solvent. The density of the resultant solution is $1.5 \ g/mL$. The ratio of its molarity $(M)$ to molality $(m)$ is:

By dissolving $0.35 \, \text{mole}$ of sodium chloride in water,$1.30 \, \text{L}$ of salt solution is obtained. The molarity of the resulting solution should be reported as $..... \, \text{M}$.

What is molarity?