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

I found #14.4kg#

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 #2,000/x# i.e. #100/0.72=(2,000)/x# rearranging: #x=0.72/100*2,000#

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Answer 2

Wyatt Adkins

In 2,000 kg of naturally occurring uranium, there are 14.4 kg of uranium-235.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.