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2 years ago

What are valence electrons? how many of a magnesium atom’s 12 electrons are valence electrons?

Chemistry

1 answer:

wlad13 [49]2 years ago

6 0

It has 2 valence electrons.

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Gnesinka [82]

Answer:

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Explanation:

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2 years ago

I need to know number 2 3 4 and 5

dexar [7]

Answer 2: 57.21235000000001

Answer 3: 44.01g

Answer 4: 24.645320000000005

Answer 5: 107.04578240000001

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2 years ago

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2 years ago

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A sample of helium has a volume of 50.00 L at STP. How many helium atoms are in the sample? Show work

Setler79 [48]

Answer:

Explanation:

molar volume at STP=22.4 L

given volume=50.0 L

number of moles=given volume/molar volume

number of moles=50.0/22.4

number of moles=2.2

1 mole of helium =6.023*10^23 atoms

2.2 moles of helium =6.023*10^23*2.2=1.3*10^24

therefore 50.0 L of helium contain 1.33*10^24 atoms

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2 years ago

For an experiment, a student needs a compound that has the following properties.

Neporo4naja [7]

The correct answer is Potassium Chloride.

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2 years ago

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