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malfutka [58]
3 years ago
12

Compare and contrast the concepts of average mass and relative mass. Which one is more accurate, and why? Why is the one you did

not choose inaccurate?
Chemistry
2 answers:
Nina [5.8K]3 years ago
6 0
A very ded dhdhdhjsoaocheoahfea
Brut [27]3 years ago
4 0

Answer:

Relative and average atomic mass both describe properties of an element related to its different isotopes.

Explanation:However, relative atomic mass is a standardized number that's assumed to be correct under most circumstances, while average atomic mass is only true for a specific sample.

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How many moles of oxygen are needed to react with 87 grams of aluminum
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Answer:

2.4 moles of oxygen are needed to react with 87 g of aluminium.

Explanation:

Chemical equation:

4Al(s)  + 3O₂(l)   → 2AlO₃(s)

Given data:

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Solution:

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Now we will compare the moles of aluminium with oxygen.

                              Al         :         O₂

                               4          :         3

                               3.2       :         3/4×3.2 = 2.4 mol

2.4 moles of oxygen are needed to react with 87 g of aluminium.

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