A student wants to compare the amounts of CO2 given off by yeast provided with different amounts of sugar. The student places a balloon over each container to catch the released CO2. How can the student make quantitative observations of the CO2 collected in the balloons?

Explanation:

The student can take the following steps in order to determine the quantity of carbon(iv)oxide given off and contained in the different balloons.

1. Tie up the end of the balloon properly after the yeasts are done releasing CO2 gas.

2. Measure the balloon's circumference and radius by wrapping a cloth tape around the centre of the balloon (for circumference) and placing rulers on each side of the centre of the balloon and measuring the distance between them while dividing the result into two (this is for radius)

3. Finally, use the formula for calculating the volume of a sphere to calculate the volume of gas present in each of the balloons