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Alenkinab [10]
2 years ago
8

25 POINTS + BRAINLIEST!!! How do you calculate the number of molecules in a substance? For example, Al2O3. (The numbers are subs

cripts) Please explain simply, to a point where a grade 9 can understand.
Chemistry
1 answer:
Scrat [10]2 years ago
3 0
You add them together

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Which statement best explains why calcium has a larger atomic radius than magnesium? A. Calcium has a stronger nuclear charge th
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Answer:

B. calcium has electrons in more energy levels than magnesium

Explanation:

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electronic configuration for both Ca and Mg are as follows

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Suppose you have a sample of table salt (NaCl) that has a mass of 100.0 grams. If
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Taking into account the definition of molarity, the concentration of the solution is 0.855 \frac{moles}{liter}.

<h3>Definition of molarity</h3>

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

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

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

<h3>Molarity of NaCl</h3>

In this case, you have:

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Replacing in the definition of molarity:

Molarity=\frac{1.71 moles}{2 L}

Solving:

Molarity= 0.855 \frac{moles}{liter}

Finally, the concentration of the solution is 0.855 \frac{moles}{liter}.

Learn more about molarity:

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<u>brainly.com/question/10608366</u>

<u>brainly.com/question/7429224</u>

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What is factor that is covered up by another trait Dominant or recessive
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