anonymous
  • anonymous
A particular device uses electromagnetism by using electricity to move magnets. The magnets in this device are then used to do work. Which device uses electromagnetism in this way? A. An electric generator B. Electricity C. An oxidation-reduction reaction D. An electric motor
Chemistry
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
@toxiclopez
anonymous
  • anonymous
I think D
anonymous
  • anonymous
it was D

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anonymous
  • anonymous
thanks
anonymous
  • anonymous
and why do you think its D??
anonymous
  • anonymous
it answer was D
anonymous
  • anonymous
i already passed
anonymous
  • anonymous
D seemed like the only logical one
anonymous
  • anonymous
alright .. well you did good... i had the same one on my test yesterday.. i also pick D and i got it right
anonymous
  • anonymous
lol did u already pass the class?
anonymous
  • anonymous
cuz im on the CST for the unit
anonymous
  • anonymous
yes with A
anonymous
  • anonymous
oh well its going to be hard ..
anonymous
  • anonymous
did u do it online?
anonymous
  • anonymous
yes
anonymous
  • anonymous
apex?
anonymous
  • anonymous
no .. my school has it wibsit .. i forgot the name of it
anonymous
  • anonymous
lol oh
anonymous
  • anonymous
well can u help me with a couple more question?
anonymous
  • anonymous
ill try my best . sure
anonymous
  • anonymous
Which of the following is an example of a galvanic cell? A. A cell with a nonspontaneous redox reaction B. A battery that has a negative voltage C. A cell that has energy added to it D. A battery that produces electricity
anonymous
  • anonymous
hmm let me think about that one ..
anonymous
  • anonymous
alrigh
anonymous
  • anonymous
@pooja195
anonymous
  • anonymous
i would say D . a battery that produces electricity... sorry if i get it wrong .. i'm still working on cells
anonymous
  • anonymous
its k (:
anonymous
  • anonymous
i just appreciate the help
anonymous
  • anonymous
What is the oxidation state of S in S2O32-? A. +4 B. +2 C. +3 D. –2
anonymous
  • anonymous
The half-reactions and overall reaction for this voltaic cell are Zn(s) → Zn2+(aq) + 2 e– Eanode..  = –0.762 V Cu2+(aq) + 2 e– → Cu(s) Ecathode  = 0.342 V Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s) Ecell  = Ecathode  – Eanode  = 0.342 – (–0.762) = 1.104 V ... my teacher says think about this first ..
anonymous
  • anonymous
lmao lookin at that just throws me off more
anonymous
  • anonymous
oh sorry i know but it dose help alot
anonymous
  • anonymous
if i understood it i bet it would help alot
anonymous
  • anonymous
lol
anonymous
  • anonymous
What is a redox reaction? A. A reaction in which protons have been transferred from one atom to another B. A reaction in which atoms have been transferred from one compound to another C. A reaction in which electrons have been transferred from one atom to another D. A reaction in which mass has been transferred from one reactant to another
anonymous
  • anonymous
do you know geometry?
anonymous
  • anonymous
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anonymous
  • anonymous
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anonymous
  • anonymous
i got this for my work class
jebonna
  • jebonna
I can help you on the last two questions you asked, if you still need it. Lets start with: What is the oxidation state of S in S2O32-? So, as you need to find the oxidation state of S, firstly we will need to find the oxidation state of O (oxygen). If you look on a periodic table, you will see that oxygen is in group 6. This means it has 6 valence electrons on its outer shell. Each element wants to have a full outer shell, just like the noble gases. A full outer shell of electrons consist of 8 electrons, so that means oxygen is 2 away from having a full shell. So, electrons have a negative charge, and the ion it forms has a full outer shell. So as we said before, oxygen needs 2 more electrons to be full. This means it charge will be 2, however we dont know if its a positive or negative charge yet. But, this is easy to figure out. Electrons are negative. If an element has more of a negative thing, it will have more of a negative charge. Same as if it had more protons, which have a positive charge, it would become more positive. Because oxygen NEEDS electrons, it will have more of a negative thing. So, now we know oxygen's oxidation number is -2. As you can see, in the compound there are 3 lots of oxygen (O3) so, we will have to times our charge by 3 (-2 x 3 = -6). So overall, the oxygens have a charge of -6. The charge on the overall compound is -2. Because compounds need a positive and negative to bond, we know S will have a positive charge. This means that we will need to keep 2- from our -6 we have on all our oxygens. So to work out the charge on S, we will basically have this equation: \[x + -6 = -2\] What will be needed to make -6 into -2? When you work this out (which is basic maths I'm sure you'll get it), that will be the charge of S.
jebonna
  • jebonna
And for this: What is a redox reaction? It is easy to remember this: OIL RIG Oxidation Is Loss (of electrons) Reduction is Gain (of electrons) It's always electrons that are being gained, or lost. Not protons, atoms or mass. So from this information you can figure out your answer. Sorry for the long explanation, I hope it helps you understand it better for the future :)

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