quick chem question...thx

[UTAustinCP]

Suppose that when you calibrated your nominally 5 milliliter pipet, you
found that it delivered the following gram amounts of water in four
different trials:
4.9713 4.9671 4.9703 4.9719
Also, you found the temperature of the water was 21.86 degrees
Centigrade. The density of water at this temperature is 1.00000 + x .
What is x ? Your answer is ___ grams/milliliter.
Your answer in decimal or scientific notation is ?

What is the best estimate of the calibrated volume of your pipet?
Your answer is ___ milliliter.
Your answer in decimal or scientific notation is ?

What is the standard deviation of the measurement of the volume of your
pipet? Your answer is ___ milliliter.
Your answer in decimal or scientific notation is ?

How many significant figures are there in the calibrated volume?
Your answer is ___ .
Your answer in decimal or scientific notation is ?

 

[Wallydraigle]

hahahahahaha!

Sorry, but I guess you get a free bump anyway. Maybe someone else will do your homework.

 

[fatalbert]

well x you can look up,


I know that the density of water at 21 degrees is 1.0030 and at 22 degrees is 1.0033,

using that find the ave amount of water delivered,

then the std. dev. those aren't hard, excel will do it for you.

oh, and quick lesson on sig figs, # in = # out

# in = measurement with least # of sig figs

 

[amnesiac]

Jeez dude if you're having problems with such basic parts of your chem homework, then you are SCREWED, sorry. Drop the class NOW.