math/chem significant figures

posted by .

Which of the answers for the following conversions contains the correct number of significant figures?

A)2.543 m x 39.4in/1m=100.1924in
B)2 L x 1.06qt/1L=2.12 qt
C)24.95 min x 1hr/60 min=0.4158 hr
D)12.0 ft x 12in/1ft x 2.54cm/1in=370cm
E)24.0 kg x 1lb/2.20kg=11lb

the answer is c but i don't understand why. i thought you round the answer based on the number of sig figs of the lowest measurement so why wouldn't D be the answer?

  • math/chem significant figures -

    C is correct
    D is correct if the zero has a line over it (ie, a significant zero)

    c is correct becaues 1hr/60 min is NOT a measurement, it is a fundamental conversion. 1hr/60min is an infinite number of significant digits.
    d is correct only if the last zero is designated as significant, we once put a line over the zero to indicated it is significant. It doesn't show that here.

  • math/chem significant figures -

    but i though d would be rounded to 2 sf, not 3 because of the 12 in. or is that wrong because 12in/ft is not a measured number?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Science (Chemistry!)

    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 …
  2. 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?
  3. Significant figures

    How would I go and express these numbers with 3 significant figures in normal notation?
  4. Math

    1. Is it more appropriate to use scientific notation for approximates or exact numbers?
  5. Math

    Any help would be appreciated! What is 38.896/5.1 + 509.15 to the correct number of significant figures?
  6. 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 …
  7. 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?
  8. 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=massxfree-fall acceleration. 3) Round 3155.24m, …
  9. Chemistry - Significant Figures

    Suppose it takes 35 min for 2.4 g of sugar to completely react with another reagent we added to the flask. What would the reaction rate be?
  10. Math

    Rounding to significant figures 99.98 to 3 significant figures Can it apply to this number as if I round to 100 this is one significant figure or we keep it as 99.9. Please clarify And same number to 2 sig figure Will it be 100?

More Similar Questions