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tankabanditka [31]
2 years ago
6

Hello please please help me​

Chemistry
1 answer:
olga nikolaevna [1]2 years ago
4 0

Answer:

            Option-A is the correct answer

Explanation:

Lithium belong to group 1 metals. Hence, it can loose one electron to form lithium ion i.e. Li⁺¹ or Li⁺

While, Nitrogen is non-metal and hence has the ability to gain the electron lost by lithium metal. Furthermore, Nitrogen can gain maximum 3 electrons to acheive noble gas configuration. Hence, three Li atoms will loose their electrons and Nitrogen will gain those three electrons to form nitride ion i.e. N³⁻.

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Which of the following weighs least?
Lunna [17]

Answer:

A

Explanation:

0.2g of atom of nitrogen is the one that weigh least cause of.2g is not up to one mole of nitrogen

7 0
3 years ago
How many liters are there in 3.49 x 10^22 molecules of O2 at STP
Sholpan [36]

Answer:

I think 767.8

Explanation:

I first did 10 times 22 bc that little carrot sign means squared so I did 10 times 22 and that equaled 220, then I did 3.49 times 220 and that is the answer which is 767.8

5 0
3 years ago
Hydrogen-3 has a half-life of 12.3 years. How long will it take a sample of 88 g of hydrogen-3 to decay to 11 g? Give your answe
Georgia [21]

The time taken for Hydrogen-3 to decay from 88 g to 11 g is 36.9 years.

<h3>Half-life:</h3>

This can be defined as the time taken for half the sample of a substance to decay or disintegrate

To calculate the time it will take Hydrogen to decay from 88g to 11 g we use the formula below.

Formula:

  • R = R'(2^{T/n})................ Equation 1

Where:

  • R = Original sample of Hydrogen
  • R' = Sample of Hydrogen left after decay
  • T = Total time of decay
  • n = Half-life of hydrogen.

From the question,

Given:

  • R = 88 g
  • R' = 11 g
  • n = 12.3 years.

Substitute these values into equation 1

  • 88 = 11(2^{T/12.3})

Solve for T.

  • 2^{T/12.3} = 88/11
  • 2^{T/12.3} = 8
  • 2^{T/12.3} = 2³................ Equation 2

Equating the base in equation 2 above,

  • T/12.3 = 3
  • T = 12.3×3
  • T =  36.9 years.

Hence, the time taken for Hydrogen-3 to decay from 88 g to 11 g is 36.9 years

Learn more about half-life here: brainly.com/question/11152793

6 0
3 years ago
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Leto [7]

Answer:

distance divided by time so A

Explanation:

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What type of evidence does the author use to support his argument that students should be required to complete service hours in
SpyIntel [72]
Answer:C



Explanation:
C. The author presents rational and logical reasons to support his argument
4 0
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