Question

Find percentage of oxygen in this sample of air Volume at the start:50 Volume at the end: 40 From the result what's the percentage of oxygen?​

Answer 1

To find the percentage of oxygen in the sample of air, we need to use the initial volume of air and the change in volume of oxygen.

If the initial volume of air was 50 and the final volume was 40, then the volume of oxygen that was consumed is:

50 - 40 = 10

This means that 10 units of oxygen were consumed out of the initial 50 units of air, or 10/50 = 0.2 (or 20%) of the original volume of air was oxygen.

Therefore, the percentage of oxygen in the sample of air is 20%.

Answer 2

To find the percentage of oxygen in the air sample, we need to know the initial and final volumes of the air sample and the percentage decrease in volume. Assuming the volume decrease is due to the consumption of oxygen, we can calculate the percentage of oxygen in the air sample as follows:

Percentage of oxygen = (volume decrease / initial volume) x 100

In this case, the initial volume is 50 and the final volume is 40, so the volume decrease is:

Volume decrease = initial volume - final volume = 50 - 40 = 10

Therefore, the percentage of oxygen in the air sample is:

Percentage of oxygen = (volume decrease / initial volume) x 100 = (10 / 50) x 100 = 20%

So, the air sample contains 20% oxygen.