# 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?

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### 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 numbers? What does ...

### 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 temperature values ...

### 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. (15.5/42)*219.5= 1. 81.0059 ...

### 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.

### 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 jist of it, but I'm ...

### 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 have a number like 0....

### 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. a) Why is it incorrect...

### multiplying and significant figs

Multipy and keep only the correct number of significant figures. 101.6 * 3

### 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, C.1.201386 meters, D.1....

### Significant figures in chemistry

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

### 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!

### 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 to do since It isn't...

### 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)

### 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 93.775 57 kg to one less ...

### 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.

### 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 1lb/2.20kg=11lb the answer ...

### 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 addition is it the ...

### math

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

### 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

### 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

### 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 following in exponential ...

### chemistry

use exponential notation to express the number 480 in 3 significant figures and 4 significant figures

### 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

### 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?

### 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 significant figure is ...

### 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 significant figures...

### 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 10^2 h. 1.2

### 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.

### 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 appropriate number ...

### 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 significant figures ...

### 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 significant figures ...

### 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 appropriate number ...

### 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 right of the decimal...

### 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 long. 212 m^2*** 211...

### 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 rectangular room that is 14.10 ...

### 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?

### 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 two significant ...

### ***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 what significant ...

### 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 =)

### 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 figures. Note that if ...

### Significant Figures

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

### 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)

### 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 0.86cm x 17.1cm= add ...

### 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 equation..for the final ...

### 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 m )x^+( 16 m )y^ ...

### 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 since the worksheet ...

### 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

### 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 simple. Please be dtailed.

### 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 three significant ...

### 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 nanometers is nm, not NM. ...

### 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

### 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 round your answer to...

### 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)

### chemersty

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

### 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?

### 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?

### 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? Express your answer ...

### 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 their uncertainty. ...

### 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?

### Significant figures

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

### Chemistry

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

### 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 calculated the "4" is...

### Significant figures

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

### 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 ± 2.0000000 or would (a) 23...

### 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 ?_?

### science

Which of the following statements the aim of the person who threw darts shown the picture? A The person's aim was both precise and accurate B The person's aim was precise,but it was not accurate. C The person's aim was accurate,but it was not precise. D The person's aim was ...

### 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 to km is a measured ...

### science

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

### 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 known to one, two, three...

### 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 to the left of ...

### 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

### 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 pressure. It was ...

### math

a student measures a rectangular room to be 20.00 m x 17.16 m which of the following the numbers below represents the rooms area with the correct number of significant figures

### 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 (760 torr/1 atm)= 273,...

### 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 figures. Okay so i tried ...

### Calculus

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

### simple math

i just wanted to know how many significant figures in the number 100

### Chemistry

It says to perform the following calculations and express your answers in the correct units and number of significant figures. 2.8g/6.86 times 10^-3 l 45.68g +3.8 g 1423 mL - 40mL

### Chemistry

For the following reaction at 600. K, the equilibrium constant, Kp is 11.5. PCl5(g) PCl3(g) + Cl2(g) Suppose that 3.314 g of PCl5 is placed in an evacuated 460. mL bulb, which is then heated to 600. K. (a) What would be the pressure of PCl5 be if it did not dissociate? 1 atm (...

### 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 =

### chemistry

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

### 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 type?

### 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 figures and include ...

### 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. Please, please help ...

### math

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

### Chem

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

### 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?

### 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 type? When might you use ...

### 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 type? When might you use ...

### 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 type? When might you use ...

### 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 type? When might you use ...

### 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 type? When might you ...

### Math

Show me how to solve problems like this. 1.) 7 + (-9) + (-5) + 6 2.) [(-3)(-4)(-5)]/ (-2)(-3)] Try reading the following sites' pages very carefully. Then make an attempt at doing the problem, and we'll see if you got it right: http://www.jiskha.com/mathematics/algebra/...

### SCIENCE CHECK

Pleas check the following for me... "A drop of oil (vol 0.051cm ) is released on to the surface of a pond where it covesr an area of 40cm2. Assume that the oil film has a uniform thickness equal to the diameter of an oil molecule. Calculate the diameter of an oil molecule & ...

### 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?

### 11th grade

determine the number of significant figures in each following measurements

### 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 individual volumes and ...

### 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 sheet, how thick is ...

### 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 sheet, how thick is ...