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3 years ago

How many moles are there in 24.00 g of NaCl

Chemistry

1 answer:

Elis [28]3 years ago

6 0

Answer:

The answer to your question is 0.41 moles

Explanation:

Data

moles of NaCl = ?

mass of NaCl = 24 g

Process

To solve this problem just calculate the molar mass of NaCl, and remember that the molar mass of any substance equals to 1 mol.

1.- Calculate the molar mass

NaCl = 23 + 35.5 = 58.5 g

2.- Use proportions and cross multiplication

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

24.0 g ------------------- x

x = (24 x 1) / 58.5

x = 0.41 moles

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Explanation:

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C. 98°F to Kelvins

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D. 77.4°F to degree Celsius

$((T)^oC)=((T)^oF-32)\times \frac{5}{9}$

$(T)^oC =(77.4^oF-32)\times \frac{5}{9}=25.22^oC$

E. 77.4 K to degree Celsius

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3 years ago

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Sample A is a pure substance

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Explanation:

We are told that the when the yellow solid, sample A is ground it turned to orange colour and was then dissolved. Some part of the solid settled out at the bottom of the beaker while some part floated on top of the water. 50g of the solid was dissolved and 50.1g of the solid was recovered.

This implies that the substance is pure since the mass dissolved was almost the same mass recovered. The 0.1g addition in mass may result from incomplete drying of the solid.

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