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djverab [1.8K]
3 years ago
7

How many grams of NaCl are contained in 0.50 L of a 4.20 M solution?

Chemistry
1 answer:
disa [49]3 years ago
8 0

Answer:

The answer to your question is the third option: 122.7 g of NaCl

Explanation:

Data

mass of NaCl = ?

molecular mass of NaCl = 23 + 35.5 = 58.5

volume = 0.50 l

concentration = 4.20 M

Formula

Molarity = \frac{moles}{volume}

     Moles = Molarity x volume

Process

1.- Substitute the data given to find the moles of NaCl

     Moles = 4.20 x 0.5

     Moles = 2.1

2.- Calculate the grams of NaCl using proportions

     58.5 g of NaCl ----------------- 1 mol

        x                     ----------------  2.1 moles

      x = (2.1 x 58.5) / 1

3.- Result

      x = 122.7 g of NaCl      

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A 13-gram rubber stopper is attached to a 0.93-meter
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<h3>Answer:</h3>

The centripetal acceleration is 26.38 m/s²

<h3>Explanation:</h3>

We are given;

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We are required to calculate the centripetal acceleration.

To get the centripetal acceleration is given by the formula;

Centripetal acc = V²/r

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Since time for 1 revolution is 1.18 seconds,

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<h3>Answer:</h3>

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<h3>Explanation:</h3>

We are given;

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