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Vladimir [108]
3 years ago
9

An element has three naturally occurring isotopes. Use the information below to calculate the weighted average atomic mass of th

e element, showing both the setup and the final answer for the calculation.
Isotope

Atomic Mass

Percent Abundance

X

1.01 u

99.984%

Y

2.01 u

0.014%

Z

3.02 u

0.002%
Chemistry
1 answer:
Mariulka [41]3 years ago
3 0
It is isotope ok!!!!!
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Unfortunately you did not specify the electronic configuration in the question, however since one of the answers must be a halogen, i took the liberty to attach an image with the configuration (both the simple numeric and spdf form) for all the halogen and all you have to do is match the electronic configuration you have in your question to the one in the table attached and you can then deduce the answer.

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zmey [24]

Answer:

d. 12.3 grams of Al2O3

Explanation:

Based on the reaction:

4Al + 3O2 → 2Al2O3

<em>Where 4 moles of Al reacts in excess of oxygen to produce 2 moles of aluminium oxide.</em>

<em />

To solve this question we must find the moles of Aluminium. With these moles we can find the moles of aluminium oxide using the reaction:

<em>Moles Al -Molar mass: 26.9815g/mol-</em>

6.50g * (1mol / 26.9815g) = 0.241 moles Al

<em>Mass Al₂O₃ -Molar mass: 101.96g/mol-</em>

0.241 moles Al * (2 mol Al2O3 / 4 mol Al) = 0.120 moles Al2O3

0.120 moles Al2O3 * (101.96g / mol) =

12.3g of Al2O3 are produced.

Right answer is:

<h3>d. 12.3 grams of Al2O3 </h3>

8 0
3 years ago
How many ions are in 1.50 grams of Na+?
Jobisdone [24]

Answer:

= 0.0652 moles

Explanation:

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2 years ago
Which scientist discovered the neutron and gave us the current basic model of
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Answer:

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Answer:

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