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77julia77 [94]
3 years ago
5

How many orbitals surround the nucleus in a neutral atom of sulfur (S)? A. 1 B. 3 C. 9 D. 6

Chemistry
1 answer:
Igoryamba3 years ago
5 0

Answer:

it may be 3

Explanation:

i hope that..

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What is the ph of 0.450 m al(no3)3 [ka for al3+(aq) = 1.00x10-5]? express your answer to two decimal places?
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Answer : The pH of the solution is, 2.67

Explanation :

The equilibrium chemical reaction is:

                           Al^{3+}+H_2O\rightarrow Al(OH)^{2+}+H^+

Initial conc.       0.450                   0               0

At eqm.           (0.450-x)                 x               x

As we are given:

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The expression for equilibrium constant is:

K_a=\frac{(x)\times (x)}{(0.450-x)}

Now put all the given values in this expression, we get:

1.00\times 10^{-5}=\frac{(x)\times (x)}{(0.450-x)}

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Which statements describe phase changes? Check all that apply. Particles in a liquid need to move more slowly in order to freeze
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Answer: Statements (A), and (C) are correct.

Explanation:

The statements that are true are as follows.

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  • Attractive forces between the particles in a liquid are broken when a liquid boils.

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If the attractive force between gas molecules have to be increased, they should be moving slower instead because moving faster does not help attracting molecules together.

Hence, the statement particles in gas move fast enough to make more attractive forces when the gas condenses is not true.


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