Question

Naturally occurring uranium contains 0.72 percent of the isotope uranium-235. What is the mass of uranium-235 in 2,000 kg of naturally-occurring uranium?

Answer 1

14.4kg..............................

Answer 2

Answer:

The answer is 14.4kg

Explanation:

I found 14.4kg and this is how.

We can use our percentage to find it as: 0.72

                                                                   100⋅2,000=14.4kg

Percentage represents a fraction of 100

so we can say that: if in 100 we have 0.72 then in 2,000 we'll have x; or using fractions:

100

0.72 has to be the same as 2,000x

100

0.72=

2,000

x

rearranging:x=0.72

                       100     times 2,000