Sunday

April 20, 2014

April 20, 2014

Number of results: 888

**Physics Sig Figs**

When you are multiplying two numbers, how do you determine the number of significant figures? You go with the lowest sig figs in your problem. so suppose you multiply 2.34 and 8.9574, in your product you should have 3 sig figs as the lowest sig fig in your problem is 2.34 ...
*Saturday, August 27, 2005 at 9:28pm by Meleas*

**Chemistry**

It can't be B and the mass is less than the mass of any of the isotopes. The % values are to three sig figs so might expect the answer to be to 3 sig figs. The only one that fits is A. If you round each step to 3 sig figs and then add you get 269.9 or 270 to 3 sig figs.
*Friday, January 30, 2009 at 3:55am by Dr Russ*

**rounding to sig figs**

The figures did not appear, so try reposting them. A tip is to put values into scientific notation and then adjust the sig figs. for example 0.003142 to two sig figs. 0.003142 is 3.142 x 10^-3 this is closer to 3.1 than to 3.2 so to two sig figs it is 3.1 x 10^-3
*Wednesday, October 22, 2008 at 10:23am by Dr Russ*

**Chem 10**

I think the brackets might be in the wrong place for the units, however.. ...the significant figures in the answer are determined by the minimum number of sig figs in the division. By putting the values into scientific notation the sig figs are obvious, which they are not when...
*Tuesday, January 18, 2011 at 1:42am by Dr Russ*

**chemistry**

Be sure your answer has the correct number of significant digits.. As both the starting values are to 2 sig figs, and assuming that you use molar masses that have 3 sig figs or greater then the answer should be to 3 sig figs.
*Tuesday, December 6, 2011 at 12:22am by Dr Russ*

**Chemistry**

8.1 x 10^-3 would have 2 sig fig - agreed 910 would have 3 - agreed it could be 3 sig figs, but it could also be 2 sig figs 175.0 would have 3 - no this is 4 sig figs. 0.751 g is 7.51 x 10^-1 g (which is 3 sig figs) 260 Hz is 2.60 x 10^2 Hz (which is 3 sig figs) as 260 could ...
*Tuesday, March 8, 2011 at 5:34am by Dr Russ*

**How many sig figs?**

For this question: what is the boiling point of 0.39 mol ethylene glycol and 0.13 mol KBr in 155 g H2O? I got 102.1470968 and I tried it with 2 and with 3 sig figs but it's both wrong. I know that's the correct answer but I don't know how many sig figs I'm suppose to use
*Thursday, March 24, 2011 at 9:23pm by Hannah*

**Math 3**

Is this intended to be a significant figures exercise? If so then 1753 to 1 sig fig is 2000 3517 to 2 sig figs is 3500 5713 to 1 sig fig is 6000 7315 to 3 sig figs is 7320
*Friday, September 17, 2010 at 12:05am by Dr Russ*

**chem.**

oh, would it be 24 (two sig figs) cause in the problem 43 has the least number of sig figs(2) or do we go by this equation: 343,000 = 43,000 x 4.184 x (Tf-22.1) = 0 and use 3 sig figs?
*Wednesday, September 15, 2010 at 5:13pm by hannah*

**chemistry**

for a manometer flask diagram, if ha = 134 mm, how do I convert to torr, Pa, and atm with the right amount of sig figs? Related to sig figs, how do I get the right amount of sig figs (which is 2) with 8339?
*Monday, October 29, 2007 at 4:56pm by Avonlea*

**sig figs**

I am having trouble with my sig figs Many scientific data are reported at 25°C. What is this temperature in kelvins and in degrees Fahrenheit? I got 3.0e2 degrees kelvin since it will have to have two sig figs but it said it was wrong
*Wednesday, August 15, 2012 at 6:01pm by Hannah*

**Chemistry**

The lowest sig fig in all the number you added was 2. So you should round your total which is 435.936 so you can get 2 sig figs in your answer. 440 has 2 sig figs.
*Thursday, February 19, 2009 at 5:05pm by Chopsticks*

**sig figs**

how do you round 0.009934 to two sig figs? would it be .010? or would that be 3 sig figs?
*Sunday, August 22, 2010 at 3:41pm by Rebekah*

**How many sig figs?**

An equilibrium mixture of the following reaction was found to have [H2] = 0.020 M and [I2] = 0.020 M at 340°C. What is the concentration of HI? H2(g) + I2(g)--> 2 HI(g) Keq = 69 at 340°C I got .166 but it said check number of sig figs so im guessing its 2 sig figs but I ...
*Sunday, April 17, 2011 at 1:13pm by Rachel*

**Chemisty (Sig Figs)**

1.20 Mm to kilometers its 1200 but when I put it in it said not the correct number of sig figs
*Wednesday, August 25, 2010 at 8:34pm by Rebekah*

**maths**

4 3/8 = 4.375 to FOUR sig figs to three sig figs that is 4.38 because when the next digit is five you round up
*Thursday, January 23, 2014 at 5:15pm by Damon*

**chemistry**

Watch your sig figs. Your answer should have 4 sig figs in it because of 66.02
*Wednesday, March 11, 2009 at 9:30pm by Chopsticks*

**chemistry**

Watch your sig figs. Your answer should have 4 sig figs in it because of 66.02
*Wednesday, March 11, 2009 at 9:30pm by Chopsticks*

**chemistry**

Watch your sig figs. Your answer should have 4 sig figs in it because of 66.02
*Wednesday, March 11, 2009 at 9:30pm by Chopsticks*

**Math**

What is the difference between the measured values of 1.05m and 1.050m? What factor of a measurement tool determines the sig figs of a measured value? The two values are different because of their sig figs, the first has 3 and the other has 4. I think that the factor of a ...
*Monday, September 3, 2012 at 3:06pm by Hannah*

**Physics(Please check)**

What is the difference between the measured values of 1.05m and 1.050m? What factor of a measurement tool determines the sig figs of a measured value? The two values are different because of their sig figs, the first has 3 and the other has 4. I think that the factor of a ...
*Sunday, September 2, 2012 at 3:22pm by Hannah*

**Physics(Please check)**

What is the difference between the measured values of 1.05m and 1.050m? What factor of a measurement tool determines the sig figs of a measured value? The two values are different because of their sig figs, the first has 3 and the other has 4. I think that the factor of a ...
*Monday, September 3, 2012 at 2:26am by Hannah*

**SIG FIGS**

How many significant figures does 22.0, 0.22, 22. , 0.022? Im just confused as to the decimal addition to numbers and what the sig figs will be for them. If you dont mind can you please state some rules for sig figs that are helpful and some confusing rules as well and pretty ...
*Thursday, September 20, 2012 at 10:34pm by Sally*

**Chemistry**

There may be nothing wrong with recording the mass as 13.73 g if for example the next step determines the volume to 2 sig figs and the objective is to calculate the density, which would be to 2 sig figs. I think the question setter is trying to get at recording the sig figs as...
*Friday, September 24, 2010 at 11:04am by Dr Russ*

**chem**

do this using the appropriate number of sig figs 320.44 − (3104.1/2.6) i got -880 as my answer and it said to check my sig figs. I thought it was all the numbers up to the ones place
*Saturday, August 18, 2012 at 3:56pm by Hannah*

**sig figs**

each of the following were suppose to be rounded to two sig figs. mark then correct or incorrect. if incorrect state the correct answer 1) 1.249 103 to 1.3 103 i know its wrong but i don't know the correct answer 2)7.999 102 to 80 its wrong and i thought it was 800. but they ...
*Monday, August 23, 2010 at 5:22pm by Sara p.*

**Physics**

9.81 has three sig figs. .0050 is two figs, the 50 on the end .0050 * 9.981 = .04905 which to two sig figs is .049 N so 0.049
*Wednesday, October 17, 2012 at 5:55am by Damon*

**Chemisty (Sig Figs)**

this is my last question for the whole assigment and im soo glad!!! (9465 + 45 - 9.9) 8.1 X 10^6 i got 76950.e6 it said it was half right and said check your number of sig figs
*Monday, August 23, 2010 at 8:09pm by Hannah*

**Chem**

well you have more 00.00 sig figs than 3 so i would put it as 4 sig figs not 3
*Friday, February 8, 2008 at 3:13pm by lauren*

**chemistry**

No. That is 5 sig figs. You want 4 sig figs in your answer because of 62.02 So the answer would be 1.182
*Wednesday, March 11, 2009 at 9:30pm by Chopsticks*

**Chemistry-sig figs**

oh so is it incorrect and the answer is 1.2 or is it 1.20? does the second answer have 3 sig figs?
*Sunday, August 22, 2010 at 2:22pm by Rebekah*

**chemistry - oops**

OOps a typo has crept in! so 253 g contains 63.55 x 253 g/159.6 = 101 g (to 3 sig figs as the minimum number of sig figs in the calculation is 3)
*Thursday, September 9, 2010 at 12:33am by Dr Russ*

**Science- Significant Figures**

Yes the answer is two, because you round it to the least number of sig figs and 150 has 2, and 100.0 has 4. So we would round the complete answer to 2 Sig Figs.
*Tuesday, October 1, 2013 at 12:33am by Ravneet Gill*

**physics**

Given: t (time): 0.29s (2 sig figs)* d (distance): 100m v = d / t v = 100m / 0.29s v = 340 m/s (remember two sig figs)*
*Thursday, October 20, 2011 at 12:13pm by fiz-iks*

**Beginning Chemistry**

I am really confused weith sig. figs. and it would really help if someone could check my answers. My answers are after each problem Determine the number of sig. figs. in the following (a)12.7040g - 6 (b)200.0 cm - 4 (c)276.2 tons - 4 (e)4.00 x 10^3 - 3 (f)100 degrees C - 1
*Thursday, September 20, 2007 at 10:01pm by Sadie*

**chemistry**

we have to have the right number of sig figs so wouldnt 0.4 be the right answer in terms of sig figs
*Sunday, February 5, 2012 at 1:26pm by kr*

**Chemisty (Sig Figs)**

Each of the following numbers was supposed to be rounded to two significant figures. For each one below, decide whether it was correctly rounded or not, and for those that were incorrectly rounded, correct them. (a) 3.149 e3 to 3.2 e3 Its incorrect but I dont know the correct ...
*Monday, August 23, 2010 at 4:34pm by Hannah*

**chemistry**

Lindsay - copper does not have a MW it has an atomic mass. The answer 100.73 g has too many sig figs. There is no necessary information missing in the question and there is no need to use moles. It is a question based on simple ratios. Atomic mass for copper is 63.55 g the ...
*Thursday, September 9, 2010 at 12:33am by Dr Russ*

**Chemistry**

KHP or potassium hydrogen phthalate is a monoprotic acid used as a primary standard. so KHP + NaOH -> KNaP + H2O if 0.1803 g of KHP has been used, this is 0.1803 g/204.2 g mol^-1 =8.829 x 10^-1 mole which reacts with the same number of moles of NaOH so concentration of NaOH...
*Thursday, December 9, 2010 at 8:51am by Dr Russ*

**scientific notation?**

Take care with the significant figures, these are much clearer in scientific notation. Also for both equations the units do not balance. (A) 186,000*60 = 1.116 X 10^7 miles If we take that the speed of light is to 3 sig figs and the minutes per hour as exact then the answer ...
*Thursday, November 13, 2008 at 11:50pm by Dr Russ*

**Chemistry 1**

For the (), you multiply and then to 3 sig figs for that part=3770. For the addition (3770+9413.4136), your sig figs are to the place of the decimal b/c the first answer only goes to the decimal place so answer is 13183 or 1.3183 x 10^4
*Saturday, September 17, 2011 at 2:52pm by Holly*

**Physics**

I'm confused about significant digits in multi-step problems. If I have something like (7.004 +0.2230)/(15.1-0.033+12.07) do I first do the addition and round to 4 sig figs and then do the denominator and round to 2 sig figs and finally divide? Or do I just work everything out...
*Monday, February 9, 2009 at 10:07pm by Katie*

**Chemistry**

Usng the relative atomic masses calculate the molecular mass for CuBr. This is the mass for one mole. I would use RAMs to at least 3 sig figs because 0.500 is to 3 sig figs. Hence calculate the mass for 0.500 moles, bearing in mind the number of significant figures in 0.500.
*Monday, December 8, 2008 at 5:19am by Dr Russ*

**How many sig figs?**

two sig figures .39 and .13
*Thursday, March 24, 2011 at 9:23pm by bobpursley*

**chemistry**

1.182 is correct. (It has 4 "sig figs" or "significant figures" since the given quantity only had 4 sig figs. Your answer can only be as accurate as the least accurate number given to you. If you would include the digit when you write the value in scientific notation - it's a ...
*Wednesday, March 11, 2009 at 9:30pm by Toothpicks*

**chemistry**

1) Starting with 75.00 g of 1-propanol and 75.00 g of PCl 3. Calculate the theoretical yield of 1-chloropropane. 3CH3CH2CH2OH + PCl 3 --> 3CH3CH2CH2Cl + H3PO3 Answer in terms of grams. the answer that i got is 98.12, is this right and how many sig figs should it be? 2) What...
*Saturday, October 1, 2011 at 7:10pm by anonymous*

**multiplying and significant figs**

Thank you so much! What about 1300 * 2.16? I know that probably also looks very simple but sig figs are confusing me, such a new concept.
*Thursday, January 17, 2013 at 8:14pm by carl*

**Chemisty (Sig Figs)**

The ending 0 after a decimal is sig, so to indicate that put a line over the zero in the tens place
*Wednesday, August 25, 2010 at 8:34pm by sylvia*

**chemistry**

a. Assuming I understand the calculation as presented as I don't get the same numerical answers. (32.453)(34.23+1.17)/(2.26-1.811)(0.00378)= (32.453)(35.40)/(0.50)(0.00378) (retaining the least precise decimal places) the next step will need to retain the sig figs. The least ...
*Thursday, June 24, 2010 at 7:45am by Dr Russ*

**SIGS FIGS **

WHAT ARE SIG FIGS
*Friday, September 16, 2011 at 1:35am by David*

**Chemistry - check answers**

Can someone please check my answers and make sure they're correct? A) How much heat would it take to raise the temperature of 46.0 g of water from 90.0 to 100.0 C? Answer using correct sig figs, sign, and units. My answer: +1.92x10^3 J B) How many joules are released when 84.0...
*Sunday, February 23, 2014 at 10:53am by Amanda*

**Chemisty **

I am sure that I have answered this one recently. Anyway you need 750 x 0.20 mmoles of HCl if you need v ml of 16M HCl, then v x 16 = 750 x 0.20 I got 9.4 ml (only 2 sig figs as both 16 M and 0.20 M are to 2 sig figs)
*Wednesday, November 17, 2010 at 9:52am by Dr Russ*

**Chemistry **

This is very like the last one. 0.0040 mol is 4.0 mmoles of HCl if we need v ml then v x 0.75 mmoles of HCl v x 0.75 =4.0 so v= 5.3 ml (2 sig figs as both 0.75 M and 0.0040 are to 2 sig figs)
*Wednesday, November 17, 2010 at 9:54am by Dr Russ*

**algebra**

So the answer is ONE for because t only has one sig fit? instead of the 9 sig figs of P which I thought was the lowest?
*Sunday, November 6, 2011 at 3:11pm by sig figs*

**Chemistry**

8.1 x 10 to (-3)power has 2 sig fig. 910 has 2 sig fig zero doesn't count unless there is a decimal point after it. 175.0 has 4 decimal point is present and zero is to the left of the other sig figs. hope this helps!
*Tuesday, March 8, 2011 at 5:34am by carla*

**chemistry**

The question as posed makes little sense in terms of significant figures and practicalities. You would not use glassware of 500.00 ml +/- 0.01 ml (5 sig figs) to prepare a solution of 0.25 M (2 sig figs). Incidently a standard 500 ml class A volumetric glassware has an ...
*Monday, October 4, 2010 at 1:39am by Dr Russ*

**chemistry**

everything I tried was wrong for the conversions and the sig figs still don't make sense. How do you make a big sig fig into a smaller one using 8339? Please give an example.
*Monday, October 29, 2007 at 4:56pm by Avonlea*

**density and density error (check calculations)**

The density calculation looks fine and I would agree with the 3 sig figs in the answer as the mass is to 3 sig figs. I am not entirely sure what you are doing with the error estimation, however the delta V seems small As a crude estimate the error in m is say +/- 0.01x10^24 or...
*Monday, January 24, 2011 at 9:55am by Dr Russ*

**Sig Figs**

In a 9V circuit, all the resistors are 20 or 40 kilo Ohms. Convention says that calcs should therefore be quoted to 1 sig fig, since the volts are the least accuracy. 2 seems better though. Any ideas?
*Sunday, February 22, 2009 at 3:34pm by charlie*

**Chemisty (Sig Figs)**

the 8.1 will limit the answer to two sig figures. The answer cannot be more precise than the least precise number.
*Monday, August 23, 2010 at 8:09pm by bobpursley*

**Physics**

I have a very similar problem due on mastering physics in an hour.. I came here to get help but now 30 minutes later I'm actually going to be giving help :). Hopefully it wont be too late depending on your time zone. u= coefficient of static friction force of friction = u*mg ...
*Sunday, October 3, 2010 at 1:00pm by kevin*

**chem**

The equation tells you that 2 moles of bicarbonate react with each mole of H2SO4 number of moles of H2SO4 6.0 mole L^-1 x 0.034 L= 0.204 mole so 0.408 moles of bicarbonate are needed. The molar mass of NaHCO3 is 84 g mole^-1 so mass of NaHCO3 0.408 mole x 84 g mole^-1 =34 g 2 ...
*Saturday, December 11, 2010 at 9:03am by Dr Russ*

**Chemistry Check**

A thermocouple was calibrated to give Celsius temperature. In the ice bath the voltage reading was 0.250 V, and in boiling water at 736 Torr the reading was 1.20 V. Derive the conversion equation between Volts and temp. C. So if I'm working this right, it should go like this: ...
*Monday, September 24, 2012 at 12:18am by Sarah*

**sig figs**

thanks!!
*Monday, August 23, 2010 at 5:22pm by Sara p.*

**How many sig figs?**

Thanks:)
*Sunday, April 17, 2011 at 1:13pm by Rachel*

**Propagation of error and sig. figs**

I'm really embarrassed to ask this! I knew how to do it before but I forgot after 2 years. I remember learning it for analytical chemistry :( So a basic problem: What is x= a+b+c? given that: a= 100.7 +/- 0.05 b= 0.61 +/- 0.005 c=226 +/- 0.5 OK. My question is the following: I...
*Friday, January 22, 2010 at 12:03am by Steven*

**Physics Sig Figs**

3 2 3 5 7 1 3 1 and 2 3 and 2 3 and 2
*Saturday, August 27, 2005 at 9:28pm by bob*

**rounding to sig figs**

1. 6 2. 8 3. 6 4. 6 5. 4 6. 4 7. 6 8. 6
*Wednesday, October 22, 2008 at 10:23am by anonymous*

**math**

See below PLEASE at ******** If computing N(t) = Pa^t where P=642.035376 and a = 2.900129566 (both are stored in calculator), to what extent should the values of N(5), N(7) and N(9) be rounded? and why? Note: N(5)= 131,718 N(7)= 1,107,849 N(9)= 9,317,847 algebra - bobpursley, ...
*Sunday, November 6, 2011 at 4:49pm by another sig figs ques Please answer*

**How many sig figs?**

two sig figures. .020 is two sig figures.
*Sunday, April 17, 2011 at 1:13pm by bobpursley*

**chem**

why are sig. figs important?
*Tuesday, December 16, 2008 at 1:17am by Natash*

**Chemistry-sig figs**

where did you get 0.049?
*Sunday, August 22, 2010 at 2:22pm by Rebekah*

**Chemisty (Sig Figs)**

What do you mean?
*Wednesday, August 25, 2010 at 8:34pm by Rebekah*

**Chemistry**

Six sig figs.
*Friday, September 13, 2013 at 12:34am by Madi*

**rounding**

Perhaps one of the follwing links will help: http://search.yahoo.com/search?fr=mcafee&p=how+to+round+903.72+joules+t+3+sig+figs Sra
*Thursday, September 9, 2010 at 7:54pm by SraJMcGin*

**algebra**

SEE BELOW PLEASE at******** If computing N(t) = Pa^t where P=642.035376 and a = 2.900129566 (both are stored in calculator), to what extent should the values of N(5), N(7) and N(9) be rounded? and why? Note: N(5)= 131,718 N(7)= 1,107,849 N(9)= 9,317,847 algebra - bobpursley, ...
*Sunday, November 6, 2011 at 3:29pm by sig figs ques 2*

**algebra**

SEE BELOW PLEASE at******** If computing N(t) = Pa^t where P=642.035376 and a = 2.900129566 (both are stored in calculator), to what extent should the values of N(5), N(7) and N(9) be rounded? and why? Note: N(5)= 131,718 N(7)= 1,107,849 N(9)= 9,317,847 algebra - bobpursley, ...
*Sunday, November 6, 2011 at 3:29pm by sig figs ques 2*

**beginning chemistry**

three sig figs
*Wednesday, September 19, 2007 at 2:58pm by Carolyn*

**science**

How do I multiply using sig figs?
*Monday, October 22, 2007 at 7:22pm by Griffin*

**MATHS**

what is 0.0113 to 2 sig figs please
*Tuesday, May 5, 2009 at 6:12pm by mathew -b*

**11th grade**

1.71 cause of Sig Figs
*Wednesday, September 9, 2009 at 8:43pm by Kevin *

**Math**

How many sig figs does tan^-1(9/7) have?
*Tuesday, August 24, 2010 at 8:45pm by jim*

**chemistry**

930000 to two sig figs
*Friday, May 13, 2011 at 9:32am by Dr Russ*

**chemistry**

0.0699 rounded to 3 sig figs.
*Tuesday, September 11, 2012 at 11:45pm by Norrie*

**Physics**

ok with correct sig figs (a) 13.7 m^-1 kg
*Thursday, August 20, 2009 at 3:04pm by QUESTION*

**Chemisty (Sig Figs)**

Nope. 77000e6 or 7.7e10
*Monday, August 23, 2010 at 8:09pm by bobpursley*

**chemistry**

...and the answer should only be to 2 sig figs.
*Friday, November 26, 2010 at 1:54am by Dr Russ*

**chem**

that would still be 1.85 with 3 sig figs
*Tuesday, February 19, 2013 at 4:55pm by Hannah*

**chemistry**

how many sig figs in this number: 32.6721
*Friday, September 13, 2013 at 12:34am by Muhammad*

**chemistry**

The answer with 3 sig figs and units is 43.6 g
*Monday, October 20, 2008 at 4:09am by MWS*

**Physics Sig Figs**

just eat the pie and all will be well
*Saturday, August 27, 2005 at 9:28pm by Ghandi*

**Chemisty (Sig Figs)**

9850 1.55E12 10.8 0.0000459
*Friday, August 20, 2010 at 7:39pm by bobpursley*

**Chemistry-sig figs**

No it is not correct. 0.049 does not round up to 0.1
*Sunday, August 22, 2010 at 2:22pm by bobpursley*

**Chemisty (Sig Figs)**

oh so i have to round. so id be 7.7e6?
*Monday, August 23, 2010 at 8:09pm by Hannah*

**Physics**

how many sig figs do you use for estimated absolute uncertainties?
*Monday, November 29, 2010 at 11:40pm by Emily*

**Chemistry**

Your right i figured it out it was due to the sig figs
*Thursday, December 9, 2010 at 9:04pm by TT*

**maths**

i think 4.631 or 4.6309 depending on sig figs.
*Saturday, September 3, 2011 at 2:14am by ALISON*

**sig figs**

To three s.f. it is 2.90. Using 2.9001 rounds to 5 s.f.
*Sunday, November 6, 2011 at 2:14pm by DrBob222*

**chem sig figs**

How many significant figures are in 0.0? And how about 0.00?
*Saturday, February 25, 2012 at 2:39pm by L.Bianchessi*

**Chemistry**

Unless they wanted 3 sig figs, which would be 0.0221M.
*Friday, March 1, 2013 at 11:55am by Devron*

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