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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: holamynameisbob6 on April 19, 2019, 02:05:42 PM

Title: SAT II Chem
Post by: holamynameisbob6 on April 19, 2019, 02:05:42 PM
Sorry if this is the wrong place to ask a test question but anyways
1. what determines the chemical properties of an element? If its electrons then why doesn't O2- and Ne have similar chemical properties? (based on a practice test they don't)
2. Also can someone explain why transition metals tend to form colors? i dont understand the explanations online.
3. where can I find good materials for descriptive chemistry? (flame test colors, solution colors, gas colors, and other random factoids)
(edit) 4. do gas always exert the same amount of pressure? meaning if I had a rigid container with 1 mole of H2. Then I add 3 moles of O2. Is the partial pressure of H2 the same as the original pressure before I added O2?

Thanks!!
Title: Re: SAT II Chem
Post by: Borek on April 19, 2019, 03:07:08 PM
1. what determines the chemical properties of an element? If its electrons then why doesn't O2- and Ne have similar chemical properties? (based on a practice test they don't)

Electrons - but not alone. You can't directly compare a charged molecule with a single atom.

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2. Also can someone explain why transition metals tend to form colors? i dont understand the explanations online.

Can you at least quote an explanation you don't understand and explain which part you don't get?

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4. do gas always exert the same amount of pressure? meaning if I had a rigid container with 1 mole of H2. Then I add 3 moles of O2. Is the partial pressure of H2 the same as the original pressure before I added O2?

Yes, partial pressure of a given gas doesn't depend on the presence of other gases.
Title: Re: SAT II Chem
Post by: Corribus on April 20, 2019, 11:15:07 AM
Yes, partial pressure of a given gas doesn't depend on the presence of other gases.
Assuming the gases behave ideally, ofc.  ;)