anonymous
  • anonymous
Carry out the following conversions. Enter your answers in scientific notation. (a) 238 amu to grams (b) 123 amu to kilograms (c) 3.07 A to meters (d) 1.67 A to nanometers
Chemistry
chestercat
  • chestercat
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anonymous
  • anonymous
a) amu is in grams b)1000g=1kg c) 1A= is 1.0x10^-10m d) 1A=0.1nm
anonymous
  • anonymous
How exactly would you convert these? Can you show me?
anonymous
  • anonymous
amu=atomic mass. atomic mass is in grams therefore amu=grams

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anonymous
  • anonymous
What about the math portion? That is what I am confused about.
anonymous
  • anonymous
Example: if p=4n and you want to figure out how many n are in 5p, then you would multiply 5*4n=20n
anonymous
  • anonymous
|dw:1441070485841:dw| When multiply conversion makes the sure the denominator is equal to the numerator. You would cancel the units you are given to find the new amount of the new unit.
anonymous
  • anonymous
So what numbers would you put where? Would the 123 amu go first as 5p
anonymous
  • anonymous
No, this just an example. 5p is not involved.
anonymous
  • anonymous
Read what I wrote above to convert amu to grams.
anonymous
  • anonymous
I get that 123 amu * (?/1 amu)
anonymous
  • anonymous
1amu=1g
anonymous
  • anonymous
Read what I wrote above please. If you do not understand what i wrote above, ask me.
anonymous
  • anonymous
Okay I read what you said again and I think I got it? I put 123 amu x (1g/ 1 amu) x ( 1000kg/ 1g) =123000
anonymous
  • anonymous
1000g=1kg so 1g does not equal 1000 kg
anonymous
  • anonymous
How much kg is in 1g then?
anonymous
  • anonymous
.001kg
anonymous
  • anonymous
You do this with a calculator and conversion. |dw:1441072287713:dw|
anonymous
  • anonymous
Now solve it!
anonymous
  • anonymous
Sorry. I'm still not doing it right. I got .123 somehow.
anonymous
  • anonymous
Got to go in like 5min. I will do the third example for you. |dw:1441072497536:dw|
anonymous
  • anonymous
3.0 x 10^-10m
anonymous
  • anonymous
Dont forget units 0.123 kg is correct!
anonymous
  • anonymous
Oh. Okay. Maybe I'm doing the scientific notation wrong on it then. I thought the math was wrong.
anonymous
  • anonymous
Because I put 1.23 x 10^-1
anonymous
  • anonymous
I skipped to d since b is giving me such a hard time and got 1.67 x 10^-1 as my answer.
anonymous
  • anonymous
Thanks for the help. I got the answer for the b.
anonymous
  • anonymous
b is 0.123 kg is correct! You got it correct.

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