unit conversions

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unit conversions

Postby myturtlemom » Sun Sep 05, 2004 8:15 pm

I really need to know how to convert 501 mg to micrograms.
The example in my chemistry book makes no sense. :!: :!:
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Re: unit conversions

Postby Knight » Wed Sep 08, 2004 1:05 am

myturtlemom wrote:I really need to know how to convert 501 mg to micrograms.
The example in my chemistry book makes no sense. :!: :!:

a millgram is 1/1000 of a gram
a micro gram is 1/1000000 of a gram. There is a factor of 1000 difference between the two units.

So: 501 mg will be 501,000 micrograms.
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converting

Postby TsHopk5@aol.com » Wed Sep 08, 2004 12:05 pm

i'm really having problems with converting. My question is when converting whether micrgrams to grams or whatever, how do you come up with your answer. are you multiplying subtracting or what?
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Postby Guest » Thu Oct 14, 2004 6:55 am

what about converting say, 18.46 micrograms to megagrams?
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Postby Guest » Thu Oct 14, 2004 7:09 am

i want to know how to convert units using the method below, but i don't know to combine multiple steps into the same equation.

18.46 micrograms = ? grams
mcg=microgram since i cant find the symbol for micrograms..

18.46mcg x (10^-6g / 1mcg) x (10^9mcg / 1g)

is this the right formula or do i have some of the fractions upside down?
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Postby Guest » Thu Oct 14, 2004 7:11 am

oops, correction (sorry for the multple posts)

18.46mcg x (10^-6g / 1mcg) x (10^9Mg / 1g)
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Postby Knight » Thu Oct 14, 2004 9:12 pm

Anonymous wrote:oops, correction (sorry for the multple posts)

18.46mcg x (10^-6g / 1mcg) x (10^9Mg / 1g)


[ASIDE: A simpler convention for using scientific notation is to use 'e' notation, where the e represents the exponent. 1x10^6 can be represented as 1e6; faster to type, and easier to read. Its the format I'll be using here.]

The first problem you have is that there are 1e6 grams per MegaGram, not 1e9. 1e9 would be a Gigagram.

In any event:

You need to have an equality statement when you do you conversions. For example:

75 cents x 1 dollar/100 cents = 0.75 dollar

Notice that 1 dollar and 100 cents are equal to each other. In your equation, 1e-6g / 1 µg is fine, but 1e9 Mg / 1g is incorrect. it should be 1e-6 Mg / g.

So:

18.46 µg x 1e-6 g / µg x 1e-6 Mg / g = 1.846e-11 g

To answer a question you asked in an earlier post; to get the µ symbol, type µ. When you do this, html will interpret is as the micro symbol. You can also do squared ( ² ) and cubed ( ³ )with ² and ³.

Before you ask, they way I was able to type out µ without it being interpreted was that I created the & symbol by using &.
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Chemistry conversions

Postby envirotech » Thu Apr 28, 2005 11:12 pm

If you want to convert milligrams to micrograms, all you have to do is multiply by 1000.
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conversions

Postby lisah » Thu May 05, 2005 8:09 pm

Is anyone there who can help me do a conversion?
I need tofind out what 20 MCG is in ML.
Thanks for any help.
lisah
 

Re: Biology Conversion

Postby Guest » Tue May 31, 2005 4:26 am

envirotech wrote:If you want to convert milligrams to micrograms, all you have to do is multiply by 1000.


How to convert 1000 grams into KG, MG and micrograms
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Postby Guest » Wed Jun 22, 2005 12:06 pm

Anonymous wrote:i want to know how to convert units using the method below, but i don't know to combine multiple steps into the same equation.

18.46 micrograms = ? grams
mcg=microgram since i cant find the symbol for micrograms..

18.46mcg x (10^-6g / 1mcg) x (10^9mcg / 1g)

is this the right formula or do i have some of the fractions upside down?

1 kg= ? liters
Guest
 

Re: Chemistry conversions

Postby Guest » Sat Jul 08, 2006 3:17 pm

envirotech wrote:If you want to convert milligrams to micrograms, all you have to do is multiply by 1000.
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