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Alex787 [66]
3 years ago
13

Which would be a good source to find weather information about your town from last month?

Chemistry
1 answer:
VLD [36.1K]3 years ago
6 0

Answer:

a reference book about weather

Explanation:

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What are the compounds for the chemical formula B4S
Nitella [24]

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boron sulfide

b=boron

s=sulfer

Explanation:

6 0
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What makes up an isotope’s mass number?
Lisa [10]

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A

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3 0
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Which number represents the water table?<br><br> 1<br> 2<br> 3<br> 4
zimovet [89]

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I think that is number 3

Explanation:

3

3 0
3 years ago
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Calculate the average atomic mass of B. The isotopes and abundances are 10B, 19.80% and 11B, 80.20%. Round answer to 3 significa
timama [110]

Given,

The two isotopes of B are 10B and 11B

% abundance of 10B = 19.80

% abundance of 11B = 80.20

Average atomic mass of B

= \frac{(mass of 10B)(abundance of 10B) + (mass of 11B)(abundance of 11B)}{100}

= \frac{(10)(19.80) + (11)(80.20)}{100}

= \frac{198 + 882.2}{100}

= \frac{1080.2}{100}

= 10.802

Therefore, the average atomic mass of B is 10.802 u

8 0
4 years ago
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Atoms and the chemical bonds that connect them cannot be observed with your eyes, so it is necessary to use a
Lera25 [3.4K]

Answer: d. both (b) and (c)

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Atoms are too small to be seen on microscopes, so we model them based on theories.

3 0
2 years ago
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