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3 years ago

I NEED HELP PLEASE, THANKS! :) What's the mass of 4.23 moles of sodium chloride, NaCl?

2 answers:

6 0

The mole is an SI unit representing a specific quantity of atoms of an element or molecules of a compound. There are 6.02 x 1023 atoms in a mole of an element or 6.02 x 1023 molecules in a compound. 6.02 x 1023 is known as Avogadro's number.

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BabaBlast [244]3 years ago

6 0

Answer:

247 grams NaCl

Explanation:

We want to convert 4.23 moles of NaCl into grams. To do so, we must first find the molar mass of NaCl.

According to the periodic table, it is 22.99 + 35.45 = 58.44 g/mol.

Now we must multiply the number of moles (4.23) by the molar mass to get the mass of NaCl:

4.23 mol * 58.44 g/mol ≈ 247 g

Thus, the answer is 247 grams of NaCl.

<em>~ an aesthetics lover</em>

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2 years ago

In a 51.0-g aqueous solution of methanol ch4o the mole fraction of methanol is 0.270. what is the mass of each component?

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3 years ago

In a percentage composition investigation a compound was decomposed into its elements: 20.0 g of calcium, 6.0 g of carbon, and 2

inysia [295]

The percentage composition of this compound : 40%Ca, 12%C and 48%O

<h3>Further explanation</h3>

Given

20.0 g of calcium,

6.0 g of carbon,

and 24.0 g of oxygen.

Required

The percentage composition

Solution

Total mass of compound :

=mass calcium + mass carbon + mass oxygen

=20 g + 6 g + 24 g

=50 g

Percentage composition :

Ca-calcium

$\tt \dfrac{20}{50}\times 100\%=40\%$

C-carbon

$\tt \dfrac{6}{50}\times 100\%=12\%$

O-oxygen

$\tt \dfrac{24}{50}\times 100\%=48\%$

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