## Chemistry 12th Edition

We know that: a. $Mr\space of \space ethanol=46$ $Moles=\frac{29}{46}=0.63moles$ $Molarity=\frac{0.63}{0.15}=4.2$ b. $Mr\space of\space Sucrose=342$ $Moles=\frac{15.4}{342}=0.045 \space moles$ $Molarity=\frac{0.045}{0.074}=0.608$ c. $Mr\space of\space NaCl=58.5$ $Moles=\frac{9}{58.5}=0.153 \space moles$ $Molarity=\frac{0.153}{0.0864}=1.77$