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Nina [5.8K]
3 years ago
14

What is the average atomic mass of an element with isotopes a b and c?

Chemistry
2 answers:
cestrela7 [59]3 years ago
5 0
Amm=(%of a × mass of a + %of b ×mass of b +%of c × mass of c)/100
vesna_86 [32]3 years ago
4 0

Answer:

Average Atomic Mass of the Isotope = [ Percentage of <em>a </em>in mass spectrum x corresponding atomic mass of <em>a</em> + Percentage of <em>b </em>in mass spectrum x corresponding atomic mass of <em>b</em> + Percentage of <em>c </em>in mass spectrum x corresponding atomic mass of <em>c </em>]

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3 years ago
Write a definition for each word and use each word in a sentence.<br> crystallization and organic
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Answer:

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If object A is placed on the pH scale at pH = 3 and object B is placed at pH = 8, which of the following must not be true?
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tamaranim1 [39]

Answer:

1.209g of MgO participates

Explanation:

In this problem, we have 0.030 moles of MgO that participates in a particular reaction.

And we are asked to solve for the mass of MgO that participates, that means, we need to convert moles to grams.

To convert moles to grams we need to use molar mass of the compound:

<em>1 atom of Mg has a molar mass of 24.3g/mol</em>

<em>1 atom of O has a molar mass of 16g/mol</em>

<em />

That means molar mass of MgO is 24.3g/mol + 16g/mol = 40.3g/mol

And mass of 0.030 moles of MgO is:

0.030 moles MgO * (40.3g/mol) =

<h3>1.209g of MgO participates</h3>
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