3 years ago

The elements helium, neon, and xenon are all part of the same ______ on a periodic table.

Chemistry

2 answers:

OLga [1]3 years ago

5 0

I think the answer would be b

egoroff_w [7]3 years ago

4 0

The answer to your guestion is B The elements helium, neon, xenon are in the same GROUP on a periodic table.

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Calculate the number of atoms in 0.316 mol of phosphorus

Nikitich [7]

Answer:

$\large \boxed {7.61 \times 10^{23}\text{ atoms}}$

Explanation:

1. Molecules of P₄

The molecular formula of phosphorus is P₄.

$\text{Molecules of P}_{4} = \text{0.316 mol P}_{4} \, \times \dfrac{ 6.022 \times 10^{23}\text{ molecules P}_{4}}{\text{1 mol P}_{4}} = 1.90 \times 10^{23}\text{ molecules P}_{4}$

2. Atoms of P

One molecule of phosphorus contains four P atoms.

$\text{Atoms of P} = 1.90 \times 10^{23}\text{ molecules P}_{4} \times \dfrac{\text{4 atoms P}}{\text{1 molecule P}_{4}}\\\\= \large \boxed{\mathbf{7.61 \times 10^{23}}\textbf{ atoms P}}$

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3 years ago

Most of an atom consists of empty space. Its mass is concentrated in its center, which is called the

inna [77]

Answer:

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Explanation:

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3 years ago

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Anna [14]

Answer:

Explanation:

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Explanation:

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