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Semenov [28]
3 years ago
10

Which element contains four electrons in its third and outer main energy level? ​

Chemistry
1 answer:
UkoKoshka [18]3 years ago
6 0

Answer:

valence electrons

Explanation:

The valence electrons are the outer most electrons and the principal energy level in which they belong will vary for .

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Calculate the mass of 2.50 mol of methanol.
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Answer:

60g

Explanation:

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Mass = Moles x mollar mass

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Mass = 60g

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3 years ago
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When was the idea of a atom first devloped
bija089 [108]

Answer:

Around 450 B.C.

Explanation:

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6 0
2 years ago
For the reaction: 2 H2 + 2 NO → N2 + 2 H2O the observed rate expression, under some conditions, is: rate = k[H2][NO]2 Which of t
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Answer:

Step 1 H2 + 2 NO → N2O + H2O (slow)

step 2 N2O + H2 → N2 + H2O (fast)

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We have two important pieces of information in the question to guide our decision making process.

The overall reaction equation, and the rate expression. The two;

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8 0
3 years ago
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MAVERICK [17]

Answer:

3.47 mol MnSO4

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5 0
2 years ago
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