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Tuesday, October 21, 2008
Tues Oct 21
SCH 3U Handed in worksheets Took up HMK Q's Q 39 p. 191 Moles of Chalk Activity HMK - Worksheet
SNC 2D Test HMK - Read p. 170-178 and Make notes on Types of Matter, Physical and Chemical Properties and Hazardous chemicals
How will you which formula you need to know or to use to solve a question like "how many moles of Fe contain the same number of atoms as 16g of sulphur?"
Ozone (O3) is a triatomic gas. You do not need to memorize triatomic gases.
You have to look at the information given and look what you are given. You are given mass (m). You want moles (n). You always know M and NA.
Thus you need n = m/M.
You are not given any information about particles and not asked for any information about particles so you don't need the other formula at all for the question you posed.
3 comments:
What are triatomic gases
How will you which formula you need to know or to use to solve a question like "how many moles of Fe contain the same number of atoms as 16g of sulphur?"
Ozone (O3) is a triatomic gas. You do not need to memorize triatomic gases.
You have to look at the information given and look what you are given. You are given mass (m). You want moles (n). You always know M and NA.
Thus you need n = m/M.
You are not given any information about particles and not asked for any information about particles so you don't need the other formula at all for the question you posed.
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