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Elena L [17]
4 years ago
13

Which of the following statements is true?

Chemistry
2 answers:
Shtirlitz [24]4 years ago
8 0

Answer: Elements in the last period are radioactive.

Explanation:

qwelly [4]4 years ago
5 0

Answer: Elements in the last period are radioactive.

Explanation:

Elements in the last period are all radioactive because they have an unstable nucleus. This period is known as the Actinides and contain elements such as Plutonium which occurs in nature and has the heaviest nucleus , while other elements are created artificially.

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3-1-5-2-4

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3 years ago
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How many molecules are indicated by writing 2 H2O
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There are 2 molecules indicated

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How many electrons does a mn have in its 3d subshell?
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Hello,


<span>the gas phase is [Ar] 3d^5 4s^2 and since there are five 3d AOs the atom has five unpaired e⁻: (↑)(↑)(↑)(↑)(↑) (Hund's rule)</span>
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An ideal diatomic gas starting at room temperature T1 = 300 K and atmospheric pressure p1 = 1.0 atm is compressed adiabatically
tangare [24]

Answer:

The final temperature of the given ideal diatomic gas: <u>T₂ = 753.6 K</u>

Explanation:

Given: Atmospheric pressure: P = 1.0 atm

Initial Volume: V₁ , Final Volume: V₂ = V₁ (1/10)

⇒ V₁ / V₂ = 10

Initial Temperature: T₁ = 300 K, Final temperature: T₂ = ? K

 

For a diatomic ideal gas: γ =  7/5

For an adiabatic process:

V^{\gamma-1 }T = constant

V_{1}^{\gamma-1 }T_{1} = V_{2}^{\gamma-1 }T_{2}

\left [\frac{V_{1}}{V_{2}} \right ]^{\gamma-1 } = \frac{T_{2}}{T_{1}}

\left [10 \right ]^{\frac{7}{5}-1 } = \frac{T_{2}}{300 K}

\left [10 \right ]^{\frac{2}{5} } = \frac{T_{2}}{300 K}

2.512 = \frac{T_{2}}{300 K}

T_{2} = 753.6 K

<em><u>Therefore, the final temperature of the given ideal diatomic gas</u></em><em>:</em> T₂ = 753.6 K

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3 years ago
This is my first question on Brainly, Can someone explain Molar mass to me? I am not very good with it..
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A mole is a unit of measure that helps us compare particles of any given substance and its mass. ... The molar mass, also known as molecular weight, is the sum of the total mass in grams of all the atoms that make up a mole of a particular molecule. The unit used to measure is grams per mole.
5 0
4 years ago
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