Significant Figures: In Calculations Video Lessons

Concept:

# Problem: Use your calculator to determine the answer to the following calculation:1.0x10-154.2x10-7Express the answer in scientific notation, ◻ × 10◻, using two significant figures.Scientific notation can be used to express very large or very small numbers more easily. For example,299800000 = 2.998 × 1080.00000509 = 5.09 × 10− 6In Mastering Chemistry, you may enter answers in scientific notation in the following format:2.998*1085.09*10-6

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###### Problem Details

Use your calculator to determine the answer to the following calculation:

$\frac{1.0\mathrm{x}{10}^{-15}}{4.2\mathrm{x}{10}^{-7}}$

Express the answer in scientific notation, ◻ × 10, using two significant figures.

Scientific notation can be used to express very large or very small numbers more easily. For example,

299800000 = 2.998 × 108
0.00000509 = 5.09 × 10− 6

In Mastering Chemistry, you may enter answers in scientific notation in the following format:
2.998*108
5.09*10-6