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anonymous
 one year ago
Anyone on? I have a few questions on significant figures and I was wondering if you could check my answers?
anonymous
 one year ago
Anyone on? I have a few questions on significant figures and I was wondering if you could check my answers?

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taramgrant0543664
 one year ago
Best ResponseYou've already chosen the best response.4Rules: 1. All nonzero digits are significant. For example: 123. (3 sig figs) 2. Zeros between nonzero digits are significant. For example: 12.507 (5 sig figs) 3. Zeros to the left of the first nonzero digit are not significant. For example: 1.02 (3 sig figs) 0.12 (2 sig figs) 0.012 (2 sig figs) 4. If a number ends in zeros to the right of the decimal point, those zeros are significant. For example: 2.0 (2 sig figs) 2.00 (3 sig figs) {This signifies greater accuracy.} 5. If a number ends in zeros to the left of the decimal point, those zeros may or may not be significant. For example: If we make a statement that the weight of an object is 120 g, how do we convey our knowledge of whether the balance was accurate to ± 1 g or ± 10 g? Answer: The ambiguity can be removed by using exponential notation. The weight can be expressed as 12. x 101 g or 1.2 x 102 g if we wish to quote unambiguously to 2 sig figs, and 12.0 x 101 g or 1.20 x 102 g if we have a confidence level extending to 3 sig figs. Note: We cannot write 120.0 g since this requires known accuracy of ± 0.1 g.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Wow this is an amazing description, thank you so much!

arindameducationusc
 one year ago
Best ResponseYou've already chosen the best response.0yes Tara is awesome....@twistnflip

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I usually help people, but I just started AP chemistry and I completely blanked on sig figs. My teacher assigned homework without doing notes or reviewing (which is ok except for the fact that I don't have my textbook yet lol)

taramgrant0543664
 one year ago
Best ResponseYou've already chosen the best response.4Calculations with numbers having different accuracies Multiplication or Division: the result can have no more sig figs than the least accurate number. For example: If an object has mass of 29.1143 g and a volume of 25.0 cm3, then its density is given by Density = 29.1143 g / 25.0cm3 = 1.164572 g cm3 = 1.16 g cm3 Addition or Subtraction: the result must be reported to the same number of decimal places as the number with the fewest decimal places. For example: 19.2g+ 0.4745g+127. g=146.6745g= 147. g because one weight is known only to the nearest 1g NOTE: Round off numbers only at the END of calculations; otherwise, errors may be inadvertently carried through.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok, got it! Thanks again! you the bomb

taramgrant0543664
 one year ago
Best ResponseYou've already chosen the best response.4No problem!! It was good for me to review them a little too since school is starting back up soon so it helped me too!!
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