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 to do? Just multiply the
  2. Math

    1.2 (1+ 23.0 x 10-6/°C*50) Could someone solve this problem for me and tell me how did you get the answer? I've tried to solve this problem in so many ways, but can't get the right answer. My multiple choices are A.0.001386 meters, B.0.00180 meters,
  3. Math

    1. Is it more appropriate to use scientific notation for approximates or exact numbers? why? 2. In one plantation, there are 2700 young trees correct to 2 significant figures. In the other there are 830 full grown trees, correct to 2 significant figures.
  4. 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? Please be specific. You may have two significant figures in the answer.
  5. 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 is 25.5C). Are
  6. 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? The other numbers I haven't a clue about are: 5.52 299,792,458 206,265 I get the
  7. 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 this makes sense if you
  8. multiplying and significant figs

    Multipy and keep only the correct number of significant figures. 101.6 * 3
  9. 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 calculation.
  10. 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, 8.777 73 cm, and
  11. Significant figures in chemistry

    can someone please explain significant figures to me?I don't understand how to round them to the right number.
  12. Math

    Any help would be appreciated! What is 38.896/5.1 + 509.15 to the correct number of significant figures? 516.78 What is (154+8446.1)/54 to the correct number of significant figures? 159.261 Thanks!
  13. Science- significant figures

    Find the answer with its correct number of significant figures. 4.311 x 0.07 =?
  14. 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? Calculate to the correct number of significant figures.
  15. Significant figures

    How would I go and express these numbers with 3 significant figures in normal notation? a)15.08 b)1444 c)83,909 d)0.524 e)0.0254 for d and e aren't they already with 3 significant figures and also in normal notation? for a, b, and c I can't figure out what
  16. math

    write 480 in a) 1 significant figure b) 2 significant figures c) 3 significant figures d) 4 significant figures
  17. math

    significant numbers 2.8723 * 1.6 = 4.59568. Is it 4.6 because it is the smallest number you are multiplying it by in the sum? e.g. 2.8723 has 5 signifigant figures but 1.6 has 2 so the answer has no more than 2.Smallest number of significant figures. With
  18. math/chem significant figures

    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
  19. 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?
  20. physics

    round of the following digits- 3.65*105(upto are place of decimal) 0.882026(upto three significant figures) 311.299(upto four significant figures) 4.783(upto two significant figures)
  21. physics online

    Assuming that Albertine's mass is 60.0 , what is , the coefficient of kinetic friction between the chair and the waxed floor? Use = 9.80 for the magnitude of the acceleration due to gravity. Assume that the value of found in Part A has three significant
  22. chemistry

    use exponential notation to express the number 480 in 3 significant figures and 4 significant figures
  23. Analytical Chemistry

    A solution is prepared by dissolving 0.2222 (¡¾0.0002) g of KIO3 in 50.00 (¡¾0.05) mL. (i) Calculate the molar mass of KIO3 with its associated uncertainty to the correct number of significant figures. (ii) Find the molarity and its uncertainty with an
  24. chemistry

    A solution is prepared by dissolving 0.2222 (¡¾0.0002) g of KIO3 in 50.00 (¡¾0.05) mL. (i) Calculate the molar mass of KIO3 with its associated uncertainty to the correct number of significant figures. (ii) Find the molarity and its uncertainty with an
  25. phsics

    Assuming that Albertine's mass is 60.0kg , what is μk, the coefficient of kinetic friction between the chair and the waxed floor? Use g = 9.80m/s2 for the magnitude of the acceleration due to gravity. Assume that the value of k found in Part A has
  26. Mathematics in science

    Can you check my answers please? 1. A student measures the volume of a liquid and finds it to be 40ML. How many significant figures are in the measurement? 1. 2** 3 4 2.Calculate the area, with the appropriate number of significant figures, of a
  27. Math in Science

    A student measures the volume of a liquid and finds it to be 40mL. How many significant figures are in the measurement? 1 *** 2 3 4 Calculate the area, with the appropriate number of significant figures, of a rectangular room that is 14.10 m wide by 15.0 m
  28. Chemistry

    How you do this? can you do the first one, i'll try the second one if you can explain Perform the following operations and give the answear in standard exponential form with the correct number of significant figures 1) 37.2mL + 18.0mL + 380mL= 2) 0.57cm x
  29. Chemistry

    Hi I just need help with question (ii) and (iii), i know how to work out (i) A solution is prepared by dissolving 0.2222 (±0.0002) g of KIO3 in 50.00 (±0.05) mL (i) Calculate the molar mass of KIO3 with its associated uncertainty to the correct number of
  30. physics

    Using the following number: 26,802 In 4 significant figures, this number would be Answer. In 3 significant figures, this number would be Answer. In 2 significant figures, this number would be Answer. In 1 significant figure, this number would b
  31. physics

    Using the following number: 26,802 In 4 significant figures, this number would be Answer. In 3 significant figures, this number would be Answer. In 2 significant figures, this number would be Answer. In 1 significant figure, this number would b
  32. significant figures- chemistry

    I'm having trouble understanding significant figures. If a problem is requires two equations to finish, which of the original measurements do I use to figure out the significant figure? For ex. 3.001+4.32= 7.321. Then I use this answer for a different
  33. Chemistry

    Give the number of significant figures in the measurement (superscript -3 for #1, and superscript 3 for #2) 1)3.85 X 10-3 2)17.30 cm3 3)0.0037 mm 1. 3 significant figures. 2. 4 s.f. 3. 2 s.f. Here is a good site to review.
  34. PHYSICS

    PLEASE HELP WITH PART E AND F THANKS!! Find the direction and magnitude of the following vectors. A⃗ =( 22 m )x^+( -15 m )y^ Express your answer in degrees using three significant figures. θA = THE ANSWER IS-34 Part B Express your answer in meters using
  35. 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? Or it stays 99 Round to 1
  36. Physics

    Problem 21.40 A pair of 10uF capacitors in a high-power laser are charged to 1.7kV. Paige Nieuwenhuis Part A - What charge is stored in each capacitor? Express your answer using two significant figures. Part B - How much energy is stored in each capacitor?
  37. Physics

    Talking about significant figures, my Physics textbook lists 5 rules for determining significant figures. 1) All nonzero digits are significant. 2) Zeros to the right of nonzero digits in a number containing a decimal point are significant. 4) Zeros to the
  38. Significant Figures

    Report the following to two significant figures a. 3.1459 b. 6.003 c. 42 d. 6.0233 x 10^23 e. 14.456 + 3.87 f. 9.9999995 - 0.0108 g. 67.3 x 6.667 h. 4.93 / 3.946
  39. Science- Significant Figures

    You calculate the area of a 150m x 100.0 m room. How many significant figures should your answer include? a. 1 b. 2 c. 3 d. 4 2?
  40. Significant Figures

    Report the following to two significant figures a. 3.1459 b. 6.003 c. 42 d. 6.0233 x 10^23 e. 14.456 + 3.87 f. 9.9999995 - 0.0108 g. 67.3 x 6.667 h. 4.93 / 3.946 Can someone please check my answers a. 3.1 b. 6.0 c. 42 d. 6.0 x 10^23 e. 18 f. 10. g. 4.5 x
  41. significant figures

    82.453 in 3 significant figures with scientific notation. ~hm..I don't know how to do this...it sounds simple but I'm confused. Help please =)
  42. physics

    Find the direction and magnitude of the following vectors. A⃗ =( 22 m )x^+( -15 m )y^ Express your answer in degrees using three significant figures. θA = Part B Express your answer in meters using two significant figures. |A⃗ | = m Part C B⃗ =( 2.5
  43. Chemistry

    The question asks me to find the absolute error using the true value=.1025M, and the mean=.1077 The answer I got was .0052...how would I convert this to 4 significant figures? (since the values have 4 significant figures)
  44. chemistry

    Suppose you are asked to find the area of a rectangle that is 2.1-cm \rm cm wide by 5.6-cm \rm cm long. Your calculator answer would be 11.76 cm 2 \rm cm^2 . Now suppose you are asked to enter the answer to two significant figures. (Note that if you do not
  45. math(significant figures)

    A pipe is measured once with a steel tape with markings every .1mm.The two ends of the pipe line up with the 0 and 40-m marks onthe tape. How should this datum be recorded using theappropriate number of significant figures? exolain how you figured it out
  46. Physics Mathematics

    do we have to have the same amount of significant numbers in the values we got by convertion? No. Your conversion factors may have some lack of precision. Examples 60sec=1min infinitely precise, a definition. 1.6km= 1mile two sig figures, because the mile
  47. Astronomy/Conversion

    There are 365.25 days in a year, 24 hours in a day, 60 minutes in an hour, and 60 seconds in a minute. Convert years into seconds. Show your work and keep 5 significant figures. Ok, so finding it is easy (multiply 24, 60, 60 and 365.25) but how does the
  48. astronomy/conversion

    There are 365.25 days in a year, 24 hours in a day, 60 minutes in an hour, and 60 seconds in a minute. Convert years into seconds. Show your work and keep 5 significant figures. Ok, so finding it is easy (multiply 24, 60, 60 and 365.25) but how does the
  49. ***Chemistry!!!!

    Carry out the following operations, and express the answer with the appropriate number of significant figures. 1.)[(285.3 multiplied by 105) - (1.500 multiplied by 103)] multiplied by 2.8948 2.) 874 multiplied by [1267 - (3.50 multiplied by 128)] *I know
  50. math

    perform this operation to the correct significant figure. 2.0cm × 0.01m in the correct significant figure. should the answer be in two or one significant figures
  51. Significant Figures

    Add (9.3x10^3) + (9.3x10^4) + (0.011x10^6) using correct significant figures?
  52. math

    Calculate the value of the following in exponential form, using standard scientific or "e" notation (for example, 105 = 1.05e2). Enter your answer with the correct number of significant figures. 885.75 g + 10.151 g - 25.50 g Calculate the value of the
  53. Math

    Find the largest angle for which sine and tangent agree to within two significant figures. Express your answer using two significant figures. Answer in radians ?_?
  54. Chemistry

    Are significant figures relevant in temperature? ex: (-459 *F - 32 *F)(5 *C/ 9 *F) = -272.78 *C So would I leave my answer as -272.78 *C? or -273 *C because of significant figures?
  55. Chemistry

    Are significant figures relevant in temperature? ex: (-459 *F - 32 *F)(5 *C/ 9 *F) = -272.78 *C So would I leave my answer as -272.78 *C? or -273 *C because of significant figures?
  56. Physics - Significant figures

    State the number of significant figures. 1) 809 Answer : 3 2) 0.0060 Answer : 5? 3) 0.00000095 Answer : 9? 4) 5.60 Answer : 3 5) 5.743 Answer : 4 6) 0.010 Answer : 4?
  57. Chemistry

    1. The reaction, CO(CH2COOH)2 CO(CH3)2 + 2CO2, follows first-order kinetics and has an activation energy of 96.6 kJ mol-1. At 293 K, k = 0.133 s-1. Find the temperature (in K) at which half-live will be 0.00692 min? Round your answer to 3 significant
  58. physics

    A model rocket leaves the ground, heading straight up at 45m/s . Part A What's its maximum altitude? Express your answer to two significant figures and include the appropriate units. Part B Find its velocity at 1 s? Express your answer to two significant
  59. Physics

    Problem 22.16 A 7.5 v battery supplies a 3.5 mA current to a circuit for 8.2 Hr . Part A - How much charge has been transferred from the negative to the positive terminal? Express your answer using two significant figures. Part B - How much work has been
  60. chemistry

    this is over significant digits. -Indicate how many significant figures are in each of the following measurements: e) 4.0 X 10-5 kg i got 1 significant digit, but i'm not sure it if it's right... (& i can't ask my teacher, the situation is complicated)
  61. Chemistry

    (1.00 x 10^5)NM - (3.96 x 10^3) NM = ? I think that since they're both NM don't you think that you can just subtract them? 96,040 NM whatever NM stands for, and I didn't factor in significant figures. Isn't that nanometers..Dr.Bob? I have no idea but
  62. chemistry

    Which of the following is NOT true? A. A measurement contains significant figures and units. B. All numbers should be recorded from a digital readout. C. The uncertain digit is estimated between the last two markings. D. If an average of 4 trials is being
  63. Chemistry

    I still don't understand how to do this problem; grams/molar mass I understand, but I need to see the steps CLEARLY. 43. How many moles are in 25.0 grams of potassium? Show your work and round your answer to the appropriate number of significant figures.
  64. physics

    A cart of mass m = 1.10 kg on a track undergoes a collision with another cart. It's velocity before and after the collision, vi and vf is measured and found to be vi = 2.12¡À0.06 m/s and vf = 0.60¡À0.08 m/s. Calculate the following quantities including
  65. Physics

    6) A school bus moves at 2.2 m/s as it pulls away from the bus stop what is the speed of the bus 20 s later after its speed has increased by 5.225 m/s? 7) The height of a computer screen is 31.25 cm and its width is 47 cm. a) is the area of the screen
  66. Physics - bobpursely

    State the number of significant figures. 1) 809 Answer : 3 2) 0.0060 Answer : 5? 3) 0.00000095 Answer : 9? 4) 5.60 Answer : 3 5) 5.743 Answer : 4 6) 0.010 Answer : 4? Physics Help - bobpursley, Sunday, September 11, 2011 at 4:59pm 2, 3, 6 are wrong: Zeroes
  67. Chemistry

    Please tell me if my answers are right. Suppose that a series of measurements have shown that the mean mass of an object is 122.4g with a standard deviation of 1.3g. How many significant figures are justified in the mean and how would you report the most
  68. chem (significant figures)

    what are the errors in the measured values g=9.910 m/s^2 amd 9.805? true value 9.797 for 9.910 i got 0.113 and for 9.805 i got 0.008. i know i need for significant figures but i got three in my answer. so what do i do?
  69. stats

    Express the following quantities to the correct number of significant figures: (a) 23.043 ± 4.321 (b) 67 ± 9.023 (c) 33.1492934 ± 2 Isn't (a) already the correct number of significant digits? Would (b) be 67.000 ± 9.023? Would (c) be 33.1492934 ±
  70. Significant figures

    How many significant figures are there in a) 0.049300 & b) 4.200*10^5. Please help me
  71. science

    What are the rules for number of sig figs in the answer when multiplying/dividing? when adding /subtracting?
  72. Chem 10

    Calculate the value of the following in exponential form, using standard scientific or "e" notation (for example, 105 = 1.05e2). Enter the correct number of significant figures. (2.700e2 cm)3 / (1.20e3 cm)2 Can't understand how many sig figs.
  73. Chemistry

    Round to the correct number of significant figures. 1) 6.02/2.23 2.70 2) 18.42/2.34 7.87 3) 35.15/3.10 11.3
  74. chemistry

    An experiment was conducted in which many pieces of data were collected. Considering all of the data, the limiting number of significant figures in the experiment was 3 significant figures. One of the values needed in these calculations was the barometric
  75. algebra

    How is doing operations—adding, subtracting, multiplying, and dividing—with rational expressions similar to or different from doing operations with fractions? Can understanding how to work with one kind of problem help understand how to work another
  76. Algebra 1B

    How is doing operations (adding, subtracting, multiplying, and dividing) with rational expressions similar to or different from doing operations with fractions? Can understanding how to work with one kind of problem help understand how to work another
  77. Alegreba

    How is doing operations (adding, subtracting, multiplying, and dividing) with rational expressions similar to or different from doing operations with fractions? Can understanding how to work with one kind of problem help understand how to work another
  78. math

    How is doing operations (adding, subtracting, multiplying, and dividing) with rational expressions similar to or different from doing operations with fractions? Can understanding how to work with one kind of problem help understand how to work another
  79. college

    How is doing operations (adding, subtracting, multiplying, and dividing) with rational expressions similar to or different from doing operations with fractions? Can understanding how to work with one kind of problem help understand how to work another
  80. Physics

    Problem 21.79 The plates of a 3.2nF parallel-plate capacitor are each 0.25 m^2 in area. Part A - How far apart are the plates if there's air between them? Express your answer using two significant figures. = Part B - If the plates are separated by a Teflon
  81. Calculus

    (sin(47))^2 + (cos(43))^2 = With the correct number of significant figures.
  82. Physics

    Problem 21.79 The plates of a 3.2 nF parallel-plate capacitor are each 0.25 m^2 in area. Part A - How far apart are the plates if there's air between them? Express your answer using two significant figures. Part B - If the plates are separated by a Teflon
  83. Geometery

    A water storage tank is shaped like a circular cylinder with half of a sphere at each end. Find the volume of the tank if the cylindrical section is 100 cm long with a 40cm diameter. Use 3.14 for ~~ Be sure to round the final answer to two decimal places.
  84. Significant figures

    78.08/100 x 748= How many significant figures should I use for the answer? 584.0 or 584?
  85. CHEM

    Convert 3.6 times 10 to the second atm to torr. I don't understand how to get atm to torr???? 1 atm = 760 torr. Is the answer 270,000 torr? Are you in to significant figures. I suspect so since the question is 3.6 x 10^2 atm. If so, then 3.6 x 10^2 atm x
  86. algerbra operations

    How is doing operations (adding, subtracting, multiplying, and dividing) with rational expressions similar to or different from doing operations with fractions? Can understanding how to work with one kind of problem help understand how to work another
  87. Chemistry

    Dividing 0.32g of sulfur by its density of 2.07g/cm^3 results in an answer with three significant figures? Am I right?
  88. chemistry

    When 15.5 + 0.125 + 2.55 are added, the answer with the correct number of significant figures is
  89. chemistry

    do the arithmetic and give the answer to the correct number of significant figures. (1.5 x 10^-4 x 61.3) + 2.01 =
  90. math

    Stuck here Question wants the correct number of significant figures. tan^-1 (9/7)=?
  91. chem 211

    When 20.0 mL of 0.535 M H2SO4 is added to 20.0 mL of 1.07 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate H of this reaction per mole of H2SO4 and KOH reacted. (Assume that the total volume is the sum of the
  92. mathss

    How do i solve the following equations giving the answers either exactly or to 3 significant figures? a)3x + 5 = 2x – 1 b)(x^2 + 9) / 2 = 10 c)x^2 = 4 (x – 1) d)2^x = 5 e)3^x+1 = 7 What do you not understand about thse euqations. They seem pretty
  93. Chem

    0.102 x 0.0821 x 273 / 1.0 what can i express this in the correct number of significant figures ?@_@
  94. Chemistry

    Perform the following calculations to the correct number of significant figures. (89.6-23.981)/0.0047
  95. Chemistry

    A certain substance undergoes decomposition by a first-order reaction which has equal to 30.0 minutes. If the initial concentration of the substance is 1.28 mol/liter, what will its concentration be after 2.50 hours? 1. 0.36 M 2. 0.040 M 3. -0.32 M 4.
  96. Math

    Compute the following special functions. Keep the correct number of significant figures. 10^5.4 Can somewhere help me with this? Is it as simple as putting it into my calculator just like that? if so, how do I know what the correct number of sig figs are
  97. Chemistry

    I..don't understand any of this: 43. How many moles are in 25.0 grams of potassium? Show your work and round your answer to the appropriate number of significant figures. Please, please help with this! Thanks -MC
  98. physics

    Find its density. Express your answer to two significant figures and include the appropriate units How does this compare with the density of water? Express your answer using two significant figures.
  99. chemistry

    I'm adding these three atomic weights (40.1+12.0+48.0) together, and I got 100.1 How can I round my answer to three significant figures? thank you!
  100. Physics

    Item 4 Two 2.0 masses are 1.0 apart on a frictionless table. Each has 1.0 of charge Part A - What is the magnitude of the electric force on one of the masses? Express your answer using two significant figures. = Part B - What is the initial acceleration of