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btobislifeu
The answer is 7.76 x 10^-2 grams

When writing scientific notations (with general form N x 10^a), you convert the given value in such a way that the N would be within 1-10 range, and a would be the number of times you move your decimal places. The sign of a would depend whether you move the decimal place to the left or right.

to the left = positive a
to the right = negative a

katanoa
7.76 · 10^-5 grams

There are 1000 mg in 1 gram.

Therefore .0776 is divided by 1000 when using dimensional analysis giving .0000776.

Scientific notation requires the digit term to be in between 0 and 10, forcing us to move he decimal place five places right.

We multiply the resulting number by 10^-5 to maintain the number’s original value.

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