Question

Avogardos number is a constant that helps scientists count atoms and molecules. it is approximately equal to 602,200,000,000,000,000,000,000. how is this number expressed in scientific notation?

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Answer 1

6.022*10^23
It’s 23 bc that exponent also includes the place values that we kept behind the 6 (022)

Answer 2

D

Step-by-step explanation:

In order to solve this problem we need to know what scientific notation is and how exponents work.

10^23 would for example be a very large number.
A is not right because you are dividing a small number by a very large number, which usually produces a very small number. Obviously 602,200,000,000,000,000,000,000 is not small, so it is not A

It is not B, because again, you are dividing a small number by a large number

It is not C, C is the same as A

D is correct because it accurately states that Avogadro's number is very large and it is in scientific notation form, which would be:
Number * 10^(another number)
ie:
6.022*10^23

E is not correct, 10^-23 is a very small number