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3 years ago

If an atom has 3 energy levels, how many sublevels should it have

Chemistry

2 answers:

AlekseyPX3 years ago

8 0

If an atom has 3 energy levels it should have 3 sublevels

RSB [31]3 years ago

5 0

If an atom has 3 energy levels, it has three sublevels. these are S, P and D.

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at a particulat temperature, a smaple of pure water has a Kw of 7.7x10-14. what is the hydroxide concentration of this sample

ycow [4]

Answer: The hydroxide concentration of this sample is $3.85\times 10^{-7}$

Explanation:

When an expression is formed by taking the product of concentration of ions raised to the power of their stoichiometric coefficients in the solution of a salt is known as ionic product.

The ionic product for water is written as:

$K_w=[H^+]\times [OH^-]$

$7.7\times 10^{-14}=[H^+]\times [OH^-]$

As $[H^+]=[OH^-]$

$2[OH^-]=7.7\times 10^{-14}$

$[OH^-]=3.85\times 10^{-7}$

Thus hydroxide concentration of this sample is $3.85\times 10^{-7}$

4 0

3 years ago

Which of the following energy quantities is equivalent to 578 J?

svlad2 [7]

Answer:

0.138 kcal

Explanation:

The answer choices are:

a) 5.78 × 10⁵ kJ

b) 138 kcal

c)0.138 kcal

d)1.38 × 10⁵ kcal

<h2>Solution</h2>

You must use the conversion factors to convert J to kcal.

1cal = 4.184J

Dividing both sides by 4.184J:

⇒ 1 = 1cal/4.184J

1kcal = 1,000cal

Dividing both sides by 1,000 cal

⇒ 1 = 1kcal / 1,000 cal

Mutiply 578J by the conversion factors to find kcal:

$578J\times 1cal/4.184J\times 1kcal/1,000cal=0.138kcal$

Notice how the units J and cal cancel to yield kcal at the end.

5 0

3 years ago

Which is an overall second-order reaction? R=k[A]2 [b]2 R=k[A][B] R=k R=k[B]

masha68 [24]

R=K[A]2 [b]2 HOPE THIS HELPS

4 0

3 years ago

What kind of energy does an unlit match have?

Harman [31]

Answer:

Potential Energy

Explanation:

Right now, the match is giving off no energy to it's environment.

Light it.

Now it's giving off a few kinds:

Thermal energy (heat)
Light energy

The match has the potential to have energy, but it currently has none.

3 0

3 years ago

What best describes the bonding in a carbon dioxide molecule?

Grace [21]

A is the answer just did it

5 0

3 years ago