3+Measurements+and+Chemical+Calculation-+scopy

# 3+Measurements+and+Chemical+Calculation-+scopy - Chapter 3...

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Chapter 3: Measurements and Chemical Calculation 1

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Convert Decimal Form to Exponential Notation a.bcd x 10 e ; where 0<a.bcd<10 Convert the numbers 500. and 0.005 in exponential notation For 500. : 500 x 10 0 5 x 10 ? Convert 1) 90000000000 9 x 10 10 2) 0.0000000009 9 x 10 -10 2
Measuring Correctly 3 Measured numbers numbers obtained when you measure a quantity using a measuring tool

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Significant Figures Rule Measured Number # of SF 1. A number is a significant number if it is a. Not a zero a. Not a zero b. One or more zeros between nonzero digits c. One or more zeros at the end of a decimal number 2. Not significant if a. At the beginning of a decimal number b. Used as a placeholder in a large number without a decimal point 4
Round off Round off to the nearest tenths: 2.549 2.550 2.551 5 If the first digit to be dropped is less than 5, leave the digit before it unchanged.

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