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HACTEHA [7]
3 years ago
13

Fine the mole. 2.41 x 10^24 molecules CO2

Chemistry
1 answer:
vlada-n [284]3 years ago
5 0

Answer:

<h2>4 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{2.41 \times  {10}^{24} }{6.02 \times  {10}^{23} }  \\  = 4.00322...

We have the final answer as

<h3>4 moles</h3>

Hope this helps you

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A 20.0 g sample of copper at 25.0 °c absorbs 475 j. What is the final temperature of the copper? (specific heat capacity of copp
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Given data:

Mass of copper (m)  = 20.0 g

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Formula:

Q = mcΔT

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8 0
3 years ago
Find the mass of AlCl3 that is produced when 25.0 grams of Al2O3 react with excess HCl according to the following equation.
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Answer:

Mass = 65.4 g

Explanation:

Given data:

Mass of Al₂O₃ = 25 g

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Number of moles of Al₂O₃:

Number of moles = mass/ molar mass

Number of moles = 25 g/  101.96 g/mol

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Now we will compare the moles of Al₂O₃  and AlCl₃.

                          Al₂O₃         :            AlCl₃

                              1             :               2

                             0.2452    :          2×0.2452 = 0.4904 mol

Mass of AlCl₃:

Mass = number of moles × molar mass

Mass = 0.4904 mol × 133.34 g/mol

Mass = 65.4 g

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Answer:

<h2><em>I hope this help you. Mark me as brainliest and rate please</em></h2>

Explanation:

<em>the terms strong and weak as applied to acids. As a part of this it defines and explains what is meant by pH, Ka and pKa. </em>

<em> </em>

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