Question

An electron has an atomic mass of 5.4 x 10-4. If a carbon atom has 6 electrons, what is the combined atomic mass of the electrons in a single Carbon atom? Answer in scientific notation.

Answer 1

Answer:

6*5.4*10^(-4)

=32.4*10^(-4)

move the decimal point, in scientific notation you only have a single digit with comma

=3.2*10^(-3)

to know if you have to increase or decrease the exponent you can write intermediary steps pur:

32.4*10^(-4)=33.4/10^4=

(3.24*10)/(10*10^3)

reduce the fraction and you have the above solution

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