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Scientific Notation

EXE. EXP. EXP. ENTER. EE. EE. Scientific Notation. Calculating with Sci. Notation. (5.44 × 10 7 g) ÷ (8.1 × 10 4 mol) =. Type on your calculator:. 5.44. 7. 8.1. 4. ÷. = 671.6049383. = 670 g/mol. = 6.7 × 10 2 g/mol. Scientific Notation. Multiplication

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Scientific Notation

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  1. EXE EXP EXP ENTER EE EE Scientific Notation • Calculating with Sci. Notation (5.44 × 107 g) ÷ (8.1 × 104 mol) = Type on your calculator: 5.44 7 8.1 4 ÷ = 671.6049383 = 670 g/mol = 6.7 × 102 g/mol

  2. Scientific Notation • Multiplication Multiply the coefficients, and add the exponents (3 x 104) x (2 x 102) = (2.1 x 103) x (4.0 x 10-7) = 6 x 106 8.4 x 10-4

  3. Scientific Notation • Division Divide the coefficients, and subtract the denominator exponent from the numerator exponent 3.0 x 105 6.0 x 102 Note that the answer has been expressed in standard form = 0.50 x 103 = 5.0 x 102

  4. Scientific Notation • Addition and Subtraction • Before numbers can be added or subtracted, the exponents must be the same; line up decimal • Changing the smaller exponent to the larger one will usually give a coefficient between 1 and 10

  5. Scientific Notation • Addition and Subtraction • (6.6 x 10-8) + (4.0 x 10-9) = • (3.42 x 10-5) – (2.5 x 10-6) = 7.0 x 10-8 3.17 x 10-5 Note that these answers have been expressed in standard form

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