To convert the scientific notation \(2.7 \times 10^{-4}\) grams to standard notation, you move the decimal point 4 places to the left (because of the negative exponent).
Starting with 2.7:
- Move the decimal left 1 place: 0.27
- Move the decimal left 2 places: 0.027
- Move the decimal left 3 places: 0.0027
- Move the decimal left 4 places: 0.00027
So, \(2.7 \times 10^{-4}\) grams is equal to 0.00027 grams.
The correct answer is 0.00027 grams.