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Butoxors [25]
3 years ago
14

Which group of elements is characterized as having little to no reactivity? Halogens

Chemistry
2 answers:
m_a_m_a [10]3 years ago
8 0

Which group of elements is characterized as having little to no reactivity?  

C. <u>Alkali Metals</u>

finlep [7]3 years ago
4 0

Answer:  Noble gases

Explanation:  Noble gases constitutes the extreme right position in the periodic table,

They are have the smallest atomic radius and are the most unreactive elements present in the whole periodic table. There outermost shell of electrons that is valence shell of electrons is completely full thus there is no chance of loss or gain of electrons.

Thus noble gas elements are also known as Inert Gases.

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It changes from a liquid from to a solid.

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Mayonnaise is made up of eggs, oil, and vinegar. Under which category it should be classified? elements compounds solutions coll
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1. What is the wave speed of a wave that has a frequency of 100 Hz and a wavelength of 0.30 m?
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Differentiate between Physical and chemical changes​
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3 years ago
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30. The density of an unknown gas at 27°C and 2 atm pressure is equal with density of N2 gas at
Zanzabum

Answer:

Molar mass of the unknown gas is 64.6 g/mol

Explanation:

Let's think this excersise with the Ideal Gases Law.

We start from the N₂. At STP conditions we know that 1 mol of anything occupies 22.4L.

We apply: P . V = n . R . T

5 atm . V = 1 mol . 0.082 . 325K

V = (1 mol . 0.082 . 325K) / 5 atm = 5.33 L

It is reasonable to say that, if we have more pressure, we may have less volume.

As this is the volume for 1 mol of N₂, our mass is 28 g. Then, the density of the nitrogen and the unknown gas is 28 g/5.33L = 5.25 g/L

Our unknown gas has, this density at 27°C and 2 atm.

If we star from this, again: 1 mol of any gas occupy 22.4L at STP, we can calculate the volume for 1 mol at those conditions:

P₁ . V₁ / T₁ = P₂ . V₂ / T₂

1 atm . 22,4L / 273K = 2 atm . V₂ / 300K

Remember that the value for T° is Absolute (T°C + 273)

[ (1 atm . 22.4L / 273K) . 300K] / 2 atm = V₂ → 12.3L

This is the volume for 1 mol of the unknown gas at 2 atm and 27°C

We use density to determine the mass: 12.3 L . 5.25 g/L = 64.6 g

That's the molar mass: 64.6 g/mol

6 0
2 years ago
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