3 years ago

Noble gases are... a. Very reactive, b.metals, c.radioactive, or d.unreactive

Chemistry

1 answer:

Andrews [41]3 years ago

4 0

Answer:

d. stable

Explanation:

Noble gases have 8 valence electrons which makes them the least reactive.

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In a college there are exactly 3000 students, exactly 60% are male. What is the number of female students

LuckyWell [14K]

Answer:

1800

Explanation:

3000x.60=1800

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3 years ago

1.what happens in the nucleus of an atom when an alpha particle is emitted?

coldgirl [10]

1) The nucleus of an atom loses 2 protons and 4 neutrons.
2) The nucleus of an atom gains a proton and it's neutrons remain the same.

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3 years ago

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Enter the electron configuration for the ion most likely formed by phosphorus. Express your answer in the order of orbital filli

Bingel [31]

Answer:

[Ne] 2s2 2p3

Explanation:

Phosphorus will most likely have an ion that will be 3- because it wants to have a full outer shell. Thus, the elctron configuration is: 1s2 2s2 2p6 3s2 3p3.

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3 years ago

Which characteristic is typical of metals? A. They are brittle. B. They do not conduct electricity. C. They are highly soluble i

shutvik [7]

D. They are malleable.

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3 years ago

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Now that Snape and Dumbledore has taught you the finer points of hydration calculations they have a slightly more challenging pr

Mrrafil [7]

Answer:

The value of an integer x in the hydrate is 10.

Explanation:

$Molarity=\frac{Moles}{Volume(L)}$

Molarity of the solution = 0.0366 M

Volume of the solution = 5.00 L

Moles of hydrated sodium carbonate = n

$0.0366 M=\frac{n}{5.00 L}$

$n=0.0366 M\times 5 mol=0.183 mol$

Mass of hydrated sodium carbonate = n= 52.2 g

Molar mass of hydrated sodium carbonate = 106 g/mol+x18 g/mol

$n=\frac{\text{mass of Compound}}{\text{molar mass of compound}}$

$0.183 mol=\frac{52.2 g}{106 g/mol+x\times 18 g/mol}$

$106 g/mol+x\times 18 g/mol=\frac{52.2 g}{0.183 mol}$

Solving for x, we get:

x = 9.95 ≈ 10

The value of an integer x in the hydrate is 10.

6 0

3 years ago