Science (Chemistry!)
posted by Hayley .
I just do not understand ANYTHING about multiplying/dividing/adding/subtracting significant figures!
For example, the problem is: Solve the following to the correct number of significant figures: (5.039)(0.0074)
What am I supposed to do? Just multiply the numbers? What does that have to do with significant figures? I'm soo confused. Help please?
You need to know the rules for significant figures when multiplying/dividiing (one set of rules) and adding/subtracting (another set of rules).
When multiplying/dividing, the "answer" may have no more significant figures than the least number in the figures used; for example, 5.039 x 0.0074 = 0.0372886 on my calculator. Now look at the numbers used to obtain that value. There are four significant figures in 5.039 and two s.f. in 0.0074. Therefore, the answer may have no more than two s.f. and the value should be rounded to 0.037.
Respond to this Question
Similar Questions

Math
1.2 (1+ 23.0 x 106/°C*50) Could someone solve this problem for me and tell me how did you get the answer? 
Chemistry
answear in standard exponential form with correct number of significant figures 0.57 cm X 0.86 cm X 17.1 cm= what don't you understand? 
Significant figures in chemistry
can someone please explain significant figures to me? 
Science
I'm a little confused when it comes to significant figures. Where it doesn't make sense to me is when zeros come before and after a number. For example: My book states that zeros that come before a digit are NEVER significant. Now … 
Math
1. Is it more appropriate to use scientific notation for approximates or exact numbers? 
Chemistry
I have a Chemistry question which should be very simple but I do not know what significant figures are. Assuming the following numbers are measurements and using the rules for significant figures, determine the answer for the following … 
Significant Figures
I'm having a hard time with significant figures. Any help would be appreciated. The first one is 0.0000000502. I put that it has three significant figures. Is this correct? 
Science Significant Figures
Calculate the area, with the appropriate number of significant figures, of a rectangular room that is 14.10 m wide by 15.0 m long. If I multiply the two values and round to the nearest whole number, I get 212 m^2. Is this right? 
SCIENCE  PLEASE HELP PLESE
1) Round 578.683 m, 47.3333 kg, and 789.5 cm to four significant figures. 2) Find the weight of a 12.25 kg dog. Round your answer to the correct number of significant figures. Use weight=massxfreefall acceleration. 3) Round 3155.24m, … 
Chemistry
Hi guys! I just learned about significant figures today, and I have a question about them. My teacher gave us a problem where all values have what I think is four significant figures (like 44.56) except the value for temperature (which …