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Ierofanga [76]
3 years ago
7

How many flourine atoms are present in 5.3 grams of flourine sample? (note that you have to use the 3 step method)​

Chemistry
1 answer:
Bingel [31]3 years ago
8 0

Answer:

1.7x10²³ Fluorine atoms are present

Explanation:

To solve this question we must know that, to find the amount of atoms of a substance from its mass, we have, as first, to convert this mass to moles using molar mass of the substance. With the moles we can find the amount of molecules using Avogadro's number. And with the formula we can know the atoms presents:

<em>Moles Fluorine (F₂, Molar mass: 37.997g/mol)</em>

5.3g * (1mol / 37.997g) = 0.139 moles F₂

<em>Molecules F₂:</em>

0.139 moles F₂ * (6.022x10²³molecules / mol) = 8.4x10²² molecules F₂

As 1 molecule of F₂ contains 2 atoms of Fluorine:

8.4x10²² molecules F₂ * 2 =

<h3>1.7x10²³ Fluorine atoms are present</h3>
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128g of sulphur are burned in excess oxygen. What mass of sulphur dioxide forms? S + O2 --&gt; SO2 *
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<h3>Further explanation</h3>

Given

Reaction

S + O2 --> SO2 *

Required

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Solution

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mol = mass : Ar

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5 0
3 years ago
What is the concentration of h+ ions in a solution of hydrochloric acid that was prepared by diluting 35.0 ml of concentrated (1
Alekssandra [29.7K]
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4 0
3 years ago
What does the mass of an object measure?
anyanavicka [17]

Answer:

the amount of matter it contain

5 0
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Read 2 more answers
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