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CHEM AND BIO HELP AND TIPS HERE

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DEGO:
hey cn any one hlp me understand the calculations chemistry (olvl)

holtadit:

--- Quote from: DEGO on April 08, 2010, 12:10:27 pm ---hey cn any one hlp me understand the calculations chemistry (olvl)

--- End quote ---

Be specific. Post a question that you dont understand and I ll help you.

DEGO:

--- Quote from: Ari Ben Canaan on April 08, 2010, 12:24:50 pm ---Be specific. Post a question that you dont understand and I ll help you.

--- End quote ---
  the solving confuse me when i solve a question  i get confused which rule to use

holtadit:

--- Quote from: DEGO on April 08, 2010, 01:06:39 pm ---  the solving confuse me when i solve a question  i get confused which rule to use

--- End quote ---

Okay for gases use the following:

moles of gas = volume of gas/24000                 NOTE: use 24000 when volume in cm^3 and use 24 instead when volume is in 24 dm^3

For liquids use::

moles of liquid= (volume of liquid in cm^3 * concentration in mol/dm^3) / 1000

For solid use:

moles = mass in grams/mass number of element           NOTE: if its a solid compound then add up the mass nos. of each element

nid404:
Thank You ari :)

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