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There is a page on his website that has all of the rules of sig figs. For problems, you would match sig figs of the number that has the lowest sig figs, which should determine how many numbers to the right of the decimal point you should put in your answer.
705418914 wrote:Specifically for Dr. Lavelle's class, how many sig figs should we be using? To the right of the deciemal point, how high should we go up?
Agree with the person above me. Here is the link (https://lavelle.chem.ucla.edu/wp-conten ... OUT_SF.pdf) to that document Dr. Lavelle posted about sig figs.
The number of sig figs to use usually depends on how many sig figs the values in the problem you are solving have. For example, if a problem said that the sample of NaCl was 1.05 g (which has 3 sig figs) and contained other additional values that had 3 sig figs or more, your answer would need to contain 3 sig figs. While working on the problem, it would probably be best to use non-rounded values since you would be using a calculator.
Yeah as everyone has been saying, you can't choose to put a certain amount of sig figs for for every problem. Calculations are as precise as the least precise measurement/number. So, generally, depending on the problem, you could have 3 sig figs or 4 sig figs in your final answer if the number with the lowest amount of sig figs in your calculations have 3 sig figs or 4 sig figs respectively.
Adding onto what everyone above said, the problems so far have not said anything with specific instructions for how many sig figs the answer should have, so it is best to pay attention to the numbers given in the problem.
It really depends on the problem and if they specify It or not. When they do not specify, I just like to go with 3 sig figs because its the most standard way of rounding up figures and in the past I have been taught to do this by teachers
The amount of sig figs depends on the lowest number of sig figs in the numbers within the problem, or if you're adding the masses of elements from the periodic table, you use the lowest amount of sig figs for your answer when adding the masses together. However, I would not advise you to use sig figs until your final answer to avoid having an answer that might be slightly off due to rounding for sig figs.
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