Question

50 ml of vinegar and 2 g of baking soda are added to flask. the flask is quickly sealed with a balloon. vinegar and baking soda react to produce carbon dioxide gas, which inflates the balloon. assume the density of the vinegar is 1 g/ml and that no gas escapes. what is the mass of the contents of the flask - balloon after the reaction stops? a) more than 52 g b) 51 g c) less than 52 g d) 52 g

Explanation:

Step1: Calculate the mass of vinegar

The density of vinegar is given as 1 g/mL and the volume of vinegar is 50 mL. Using the formula $m =
ho V$ (where $m$ is mass, $
ho$ is density and $V$ is volume), we have $m_{vinegar}=
ho_{vinegar}V_{vinegar}=1\ g/mL\times50\ mL = 50\ g$.

Step2: Calculate the total initial mass

The mass of baking - soda is 2 g. The total initial mass of the reactants is $m_{total\ initial}=m_{vinegar}+m_{baking - soda}=50\ g + 2\ g=52\ g$.

Step3: Consider the law of conservation of mass

In a closed system (the flask - balloon system where no gas escapes), the mass is conserved. So the mass of the contents of the flask - balloon after the reaction stops is equal to the total initial mass of the reactants.

Answer:

A. more than 52 g