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Elden [556K]
3 years ago
8

What are the periodic trends of ionic radii? Check all that apply.

Chemistry
2 answers:
Troyanec [42]3 years ago
6 0
Atomic radii increase when going down a group and decreases when going towards the anion periods. So A and D.
Goryan [66]3 years ago
4 0

Ionic radii tend to increase down a group, so A, cationic radii tend to decrease across a period, so D, Ionic radii increase when switching from cations to anions in a period, E.

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grigory [225]
I can not get ur question
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3 years ago
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Does the result of the calculation in question 3 justify your original assumption that all of the SCN^- is in the form of FeNCS^
Naddik [55]
Fe 3+ + SCN- --> FeSCN 2+ 

<span>.......Fe 3+ .......SCN-.........FeSCN 2+ </span>
<span>I.......0.04..........0.001.............. </span>
<span>C........-x...............-x............. </span>
<span>E.....0.04-x.....0.001-x...........x </span>

<span>Keq = 203.4 = x / (0.04-x)(0.001-x) </span>
<span>203.4 = x / (x^2 - 0.041x + 4x10^-5) </span>
<span>203.4x^2 - 8.34x + 0.00094 = x </span>
<span>203.4x^2 - 9.34x + 0.00094 = 0 </span>
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5 0
2 years ago
Which rock is an example of a clastic sedimentary rock?
Anton [14]
The correct answer is Shale
8 0
3 years ago
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If you had 15 molecules of H2 and an unlimited supply of N2, how many
Masja [62]

Answer:

10 molecules of NH₃.

Explanation:

N₂ + 3H₂ --> 2NH₃

As the N₂ supply is unlimited, what we need to do to solve this problem is <u>convert molecules of H₂ into molecules of NH₃</u>. To do so we use the <em>stoichiometric coefficients</em> of the balanced reaction:

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10 NH₃ molecules could be prepared from 15 molecules of H₂ and unlimited N₂.  

8 0
3 years ago
3.
Vsevolod [243]

Answer:

2 half-lives=0.8

6 half-lives= 0.05

Explanation

Half-lives are constant and always decrease by half, implying that the concentration decreases by half at a consistent rate.

3.2/2= 1.6/2= 0.8 is two half-lives

3.2/2= 1.6/2= 0.8/2= 0.4/2= 0.2/2= 0.1/2=0.05 is six half-lives

3 0
2 years ago
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