Question

Mass defect for oxygen-16 = 0.13261 amu How many kilograms does the mass defect represent? 1.66 × 10-27 kg 2.20 × 10 -28 kg 3.0 × 108 kg 8.24 x 1025 kg

Answer 1

The correct option is B which is 2.20 × 10-28 Kg .

Step-by-step explanation:

Given mass defect of oxygen is equal to 0.13261 amu .

Now the question is the mass defect of oxygen in kilograms.

amu is one of the unit of mass which is equal to the 1/12 of mass of an atom of carbon-12.

While 1 amu = 1.66 * 10-27 Kg

So

0.13261 amu = 1.66 * 10-27 Kg × 0.13261

= 22.01 × 10-29 or 2.201 × 10-28 Kg

So if we covert the amu to kilograms which means from small unit of mass to large unit of mass. The 0.13261 amu is equal to 2.20* 10-28 Kg

Answer 2

The correct answer is 2.20 × 10⁻²⁸ kg

Mass defect for oxygen-16 = 0.13261 amu

1 amu = 1.66 × 10⁻²⁷ kg

Converting amu to kg we get,

0.13261 amu ( 1.66 × 10⁻²⁷ kg / 1 amu ) = 2.20 × 10⁻²⁸ kg

Thus the mass defect for oxygen-16 in kilograms is 2.20 × 10⁻²⁸