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3 years ago

Sub-groups on periodic table

Chemistry

1 answer:

marissa [1.9K]3 years ago

4 0

Answer:

Subgroups S, P, D, F, including elements of blocks s, p, d, f, respectively.

<h2>Hope it helps you✨. </h2>

Thanks☸.

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The answer is the third one

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3 years ago

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If a sample of air initially occupies 240L at 2 atm how much pressure is required to compress it to 20L at constant temperature

IceJOKER [234]

Answer:

24 atm.

Explanation:

From the question given above, the following data were obtained:

Initial volume (V₁) = 240 L

Initial pressure (P₁) = 2 atm

Final volume (V₂) = 20 L

Temperature = constant

Final pressure (P₂) =?

The final pressure required, can be obtained by using the Boyle's law equation as shown below:

P₁V₁ = P₂V₂

2 × 240 = P₂ × 20

480 = P₂ × 20

Divide both side by 20

P₂ = 480 / 20

P₂ = 24 atm

Thus, the final pressure required is 24 atm.

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3 years ago

3. True or False: White light is a mixture of all colors of the visible

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it's true ....

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An ideal gas is made up of gas particles that

Hatshy [7]

Answer:

no it is mad out of gas

Explanation:

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4 years ago

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avanturin [10]

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<h3>Further explanation </h3>

The atomic nucleus can experience decay into 2 particles or more due to the instability of its atomic nucleus.

Usually radioactive elements have an unstable atomic nucleus.

General formulas used in decay:

$\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{t/t\frac{1}{2} }}}$

T = duration of decay

t 1/2 = half-life

N₀ = the number of initial radioactive atoms

Nt = the number of radioactive atoms left after decaying during T time

Nt=25 g

No=100 g

t1/2=5770 years

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3 years ago