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#1 |
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FFR Player
Join Date: May 2011
Posts: 230
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Ok so this is the final question to my homework, and I cannot get this question wrong. I think I know the correct answer but I want to be 100% sure. Now I know this may be an easy question to most of you guys, so don't make fun of me too much.
A sample of iron has a volume of 10.0 mL. The density of iron is 7.87 g/mL. Which is the correct expression to calculate the mass of the sample using dimensional analysis? Here are the choices. 10.0 mL × (7.87 mL/1 g) 10.0 mL × (1 mL/7.87 g) 10.0 mL × (1 g/7.87 mL) 10.0 mL × (7.87 g/1 mL) Thanks in advance. |
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#2 |
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End of the road
Join Date: Oct 2006
Location: Canada
Age: 27
Posts: 3,706
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lol its the last one 10.0 mL x (7.87 g/1 mL)
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#3 |
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FFR Player
Join Date: May 2011
Posts: 230
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Thanks, I still might have more questions.
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#4 |
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FFR Player
Join Date: May 2011
Posts: 230
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Here's another one I'm stuck on
If the heat of fusion is 32.2 kJ/mol, the amount of heat energy required to melt 5.67 grams of FeO is - 5.32 kJ 2.54 kJ 18.3 kJ 3.26 kJ |
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#5 |
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D6 FFR Legacy Player
Join Date: Jan 2009
Age: 29
Posts: 4,211
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#6 |
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FFR Player
Join Date: May 2011
Posts: 230
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Thanks, I got the answer.
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#7 |
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FFR Player
Join Date: May 2011
Posts: 230
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#8 |
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FFR Player
Join Date: May 2011
Posts: 230
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1k credits to whoever answers, not much but it's something.
nvm I guessed and got it wrong
__________________
Last edited by DustyFart; 05-7-2012 at 06:09 PM.. |
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