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Rom4ik [11]
3 years ago
5

8)

Chemistry
1 answer:
Rina8888 [55]3 years ago
7 0
B mass but not of charge
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How many molecules are in 97.21 grams of Sodium Chloride (NaCl)?
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.................. are microorganism used to improve soil fertility.<br>plz ams it correct​
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Some bacteria like <em><u>rhizobium</u></em> and <u><em>blue green algae</em></u> are able to fix nitrogen gas from the atmosphere to enrich the soil with nitrogen compounds and increase its fertility. The nitrogen-fixing bacteria and blue green algae are called <u><em>biological nitrogen fixers.</em></u>

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3 years ago
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TIME REMAINING 52:03 Considering the activity series given below for metals and nonmetals, which reaction will occur?
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Answer:

2NaBr + I2 Right arrow. 2NaI + Br2

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Explanation:

The activity or electrochemical series is an arrangement of elements according to their order

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9. What type of bonds hold polyatomic ions together?
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The partial Lewis structure that follows is for a hydrocarbon molecule. In the full Lewis structure, each carbon atom satisfies
ahrayia [7]

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C-C> C=C> C\equiv C

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Carbon is a  non-metal and has 6 electrons. In the excited state, it contains 4 electrons in its outermost shell and so 4 electrons take place in covalent bond formation. In a molecule , 2 carbon atoms can be bound by a single bond, the double bond and by a triple bond. Since the bond length of C\equiv C is 120 pm, the bond length of C=C is 134 pm and the bond length of C-C is 154 pm. Thus in the given compound, C= C-C\equiv C , in which C= C is labeled as 1,  C-C is labeled as 2 and C\equiv C is labeled as 3. So the bond length of carbon-carbon bonds in the molecule, in decreasing order is 2 > 1  >3.

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3 years ago
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