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PSYCHO15rus [73]
3 years ago
10

What happens to the number of valence electrons as you move from element 1 to element 18 on the periodic table?

Chemistry
2 answers:
BARSIC [14]3 years ago
6 0

Answer:

B

Explanation:

the group number is=valence electrons. element 1 is in group 1 element 18 is in group 8. 1<8

zysi [14]3 years ago
3 0

Answer:

the answer is b

Explanation:

i just know

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7.5 moles of nitrogen gas (N2) is formed in the following reaction. How many grams
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Answer:

Mass = 255 g

Explanation:

Given data:

Number of moles of nitrogen = 7.5 mol

Mass of ammonia formed = ?

Solution:

Chemical equation:

3H₂ + N₂      →    2NH₃

Now we will compare the moles of nitrogen and ammonia.

             N₂         :        NH₃

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Mass of ammonia:

Mass = number of moles × molar mass

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Mass = 255 g

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3 years ago
Are scientific theories all proven facts?
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3 years ago
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