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Chemistry question!!!!!

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LS.
Posts: 1841 - Karma: 858

3. What is the total number of electrons in the Zn2+ ion?

A. 36 B. 32 C. 30 D. 28

Feb 2 2011 1:38AM
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Bukkakeskitrip
Posts: 5677 - Karma: 95
30
Feb 2 2011 1:40AM
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LS.
Posts: 1841 - Karma: 858

6. Look at the atomic mass of carbon. If there were only the three isotopes of carbon given below,

which isotope would be the most abundant?

A. 14C B. 13C C. 12C D. cannot predict from information given

Feb 2 2011 1:41AM
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Dan.P
Posts: 1351 - Karma: 12
28
Feb 2 2011 1:41AM
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Dan.P
Posts: 1351 - Karma: 12
12C
Feb 2 2011 1:42AM
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Bukkakeskitrip
Posts: 5677 - Karma: 95
wrong, dont listen to the trolls
Feb 2 2011 1:43AM
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smooticus
Posts: 1798 - Karma: 27
The atomic number of Zn is 30. As you should know this is also the number of protons. For the atom to be nuetral there should be the same amount of electrons 30. Now to find the electrons in your ion, which has a positive charge of two, all you need to do is take away 2 electrons. So there are 28 electrons in Zn2+. As you can see there are two more protons then neutrons, making the charge total 2+
Feb 2 2011 1:43AM
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LS.
Posts: 1841 - Karma: 858

9. Which of the following IS NOT a stable ion?

A. K+ B. S2– C. Al+4 D. Mg2+


Feb 2 2011 1:43AM
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LS.
Posts: 1841 - Karma: 858

13. What is the total number of electrons in the S ion?

A. 18 B. 16 C. 14 D. 10



18. How many protons, neutrons, and electrons are found in

127

I–

A. 53 protons 127 neutrons 54 electrons

B. 53 protons 74 neutrons 52 electrons

C. 127 protons 53 neutrons 1 electron

D. 53 protons 74 neutrons 54 electrons





thats all thanks!!

Feb 2 2011 1:44AM
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Bukkakeskitrip
Posts: 5677 - Karma: 95
oops, i fucked up. apologies
Feb 2 2011 1:44AM
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Dan.P
Posts: 1351 - Karma: 12
Do your own homework
Feb 2 2011 1:53AM
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hue.
Posts: 1518 - Karma: 220
seriously
Feb 2 2011 2:00AM
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awesomeness17
Posts: 639 - Karma: 27
C. Al+4 because normally it is +3
Feb 2 2011 2:04AM
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COskier
Posts: 1066 - Karma: 131
This, and if you can't figure out this crap, then just quit now. The world needs ditch diggers too.
Feb 2 2011 2:06AM
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LS.
Posts: 1841 - Karma: 858
lead the way bro not like your helping
Feb 2 2011 2:07AM
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awesomeness17
Posts: 639 - Karma: 27
13. Pretty sure 16 cause' that it would normally form -2. I don't understand number 18 but a guess is D
Feb 2 2011 2:10AM
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awesomeness17
Posts: 639 - Karma: 27
and for 13 just look at the periodic table and see that the periodic number is the same as the number of electrons in an ion. If its asking for an ion, it will be the same as the periodic number unless stated otherwise. But the noble gases will be non-ionic unless otherwise determined.
Feb 2 2011 2:14AM
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squibble
Posts: 4569 - Karma: 104
ANOTHER QUESTION

is there any way to dissolve polyurethane (pleather) without getting everything all goopy and fucked up? i want to remove the cracking pleather from my headphones without hurting the cloth material underneath
Mar 26 2011 2:22PM
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squibble
Posts: 4569 - Karma: 104
i plan to get this shit off, then buy some velour, take them to a seamstress and get her to recover the earpads, if anyone else wants this info: "Polyester-based polyurethanes (designated under ASTM D1418 as AU) are, however, highly susceptible to degradation as a result of contact with the combination of heat and water (humidity)."

so i'll put them in the oven and spray them with water?
Mar 26 2011 2:33PM
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vailsux.com
Posts: 1769 - Karma: 440
You fail.
Mar 26 2011 4:21PM
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vailsux.com
Posts: 1769 - Karma: 440
Do you not have a chemistry book? This should be in like chapter 1,2, or 3.
Mar 26 2011 4:26PM
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