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ValentinkaMS [17]

3 years ago

13

Enter an abbreviated electron configuration for magnesium: Express your answer in complete form, in order of increasing energy.

For example, [He]2s22p2 would be entered as [He]2s^22p^2.

2 answers:

stiks02 [169]3 years ago

6 0

Answer:

1s2, 2s2,2p6,3s2

Explanation:

harkovskaia [24]3 years ago

6 0

Answer:

[Ne]3s²

Explanation:

Mg

1s2 2s2 2p6 3s2 or [Ne]3s²

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17. Which of the following describes a condition in which an individual would not hear an echo?

ivanzaharov [21]

<span>The right answer is D. In a situation where the sound wave reaches the ear and the reflected wave reaches the ear less than 0.1 seconds later, the individual would not be able to hear an echo. There needs to a far more significant delay between the sound and the reflection of said sound reaching the listener's ear for the echo effect to become apparent.</span>

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A sample of aluminum weighs 100 grams and has a volume of 37.03 cm. What is the density of

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Answer:

2.7005 g/cm²

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Put these numbers from greatest to least precision<br> 0.10 g/mL <br> 0.0447g/mL <br> 0.0700g/mL

horrorfan [7]

I am going to go with,

0.10 g/mL
0.0700 g/mL
0.0447 g/mL

I don't know if this is the correct answer, but I am 80% sure that it may be.
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3 years ago

Is oatmeal a compound

Alika [10]

Answer:

no

Explanation:

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If 2.1 moles of NaCl is dissolved in a solution with a total volume of 7.3 liters, what is the molarity of the solution? Round t

Arturiano [62]

Answer:

The molarity of the solution is 0.29 $\frac{moles}{liter}$

Explanation:

Molarity, or molar concentration, is a measure of the concentration of a solute in a solution, be it some molecular, ionic or atomic species. It is defined as the number of moles of solute that are dissolved in a given volume.

Molarity is calculated as the quotient between the number of moles of solutes and the volume of the solution:

$Molarity=\frac{number of moles of solute}{volume}$

Molarity is expressed in units $\frac{moles}{liter}$ .

In this case:

number of moles of solute= 2.1 moles
volume= 7.3 liters

Replacing:

$Molarity=\frac{2.1 moles}{7.3 liters}$

Molarity= 0.29 $\frac{moles}{liter}$

<u><em>The molarity of the solution is 0.29 </em></u> $\frac{moles}{liter}$ <u><em></em></u>

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2 years ago

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