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Lena [83]
3 years ago
12

For Al, its atomic number is 13 and its mass number is 27. How many neutrons does it have?

Chemistry
2 answers:
solong [7]3 years ago
5 0
14 i just took this test
poizon [28]3 years ago
3 0
14 neutrons... hope it is correct!!!!!!!!
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The specific heat capacity of an unknown metal is 0.343 J/(g•°C). Calculate the energy required to raise the temperature of 224
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3 years ago
What is the empirical formula of a compound containing 40.0% sulfur and 60.0% oxygen by mass?
gizmo_the_mogwai [7]

in order to determine empirical formula we have to determine the mole ratio of the given elements

Let the total mass of the compound is 100g

as given that the compound has 40% sulfur , so mass of sulfur = 40g

as given that the compound has 60% oxygen, so mass of oxygen = 60g

let us calculate the moles of each element

Moles of sulfur = mass / atomic mass = 40 / 32 = 1.25

moles of oxygen = mass / atomic mass = 60/ 16 = 3.75

In order to get simple ratio of moles we will divide both the moles with least number of moles which is 1.25

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3 0
3 years ago
Which element has the electron configuration [Rn] 7s2 5f14 6d4 ?
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Answer:

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Explanation:

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