Scelta multipla
Which of the following is the correct scientific notation for 0.000345?
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1. Intro to General Chemistry
Scientific Notation
Scelta multipla
Which of the following is the correct representation of 702.0 g in scientific notation?
A
7.02 × 10^{1} g
B
70.20 × 10^{1} g
C
7.020 × 10^{2} g
D
0.7020 × 10^{3} g
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Understand that scientific notation expresses a number as a product of a number between 1 and 10 and a power of 10.
Identify the original number: 702.0 g.
Move the decimal point in 702.0 to create a number between 1 and 10. For 702.0, moving the decimal two places to the left gives 7.02.
Count how many places the decimal was moved; this number becomes the exponent of 10. Since the decimal moved 2 places left, the exponent is 2.
Write the number in scientific notation as \(7.02 \times 10^{2}\) g, and adjust significant figures if necessary to match the original precision.
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