CHEMGEN Lecture 2: BASIC TOOLS OF CHEMISTRY
11 Feb 2023
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Document Summary
The science of matter and the transformations it can. It helps us understand our surroundings and the way we. It plays a central role in medicine, engineering and many. To add or subtract scientific notation, n1 and n2 must be expressed with the same exponent. Then add/subtract n1 and n2;the exponents will not undergo. function. sciences. change. To multiply scientific notation, n1 and n2 must multiply in usual way. To divide scientific notation, n1 and n2 must divide in. Example: (4. 0 x 106) x (2. 0 x 103) Example: (4. 0 x 106) (2. 0 x 103) = 2. 0. Rules of significant figures: non-zero digits are always significant. 103. 230002: all final zeros after the decimal point are significant. 0. 0420: zeros between two other significant digits are always significant. 6. 01: zeros used only for spacing the decimal point are not significant. 0. 00000233: if a number is greater than 1, all zeros written after the decimal point is significant.
