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3 years ago

Need Some Quick Help, Please :)

Chemistry

1 answer:

Ray Of Light [21]3 years ago

6 0

I think that it is D because the higher the molecular mass, the higher it's boiling point. I hope that helped:) Bye!

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In the compound H2O, the electrons in the bonds are unequally shared between oxygen and hydrogen, forming ____. (1 point)

Aloiza [94]

<span>polar bonds due to high difference . In electronegativity of oxygen and hydrogen.</span>

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3 years ago

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Uranium (VIII) Sulfide formula

tresset_1 [31]

Answer:

US₂

Explanation:

Uranium sulfide (US₂)

Uranium atomic symbol = U

Sulfur atomic symbol = S

Uranium valency = +4

Sulfur valency = -2

So;

Uranium sulfide (US₂)

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3 years ago

Which measure of a gas does the expression

Usimov [2.4K]

Answer:

A. volume

Explanation:

Generally the equation for the ideal gas is mathematically given as

PV=nRT

Where

P=pressure

V=volume

R=gas constant

n=Number of Moles

T=Temperature

Therefore

V=nRT/P

Option A

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3 years ago

The town of Natrium, West Virginia, derives its name from the sodium produced in the electrolysis of molten sodium chloride (NaC

Alona [7]

Explanation:

The reaction equation will be as follows.

$Na^{+} + e^{-} \rightarrow Na(s)$

Hence, moles of Na = moles of electron used

Therefore, calculate the number of moles of sodium as follows.

No. of moles = $\frac{mass}{\text{molar mass}}$

= $\frac{4500 g}{23 g/mol}$ (as 1 kg = 1000 g)

= 195.65 mol

As, Q = $n \times F$ where F = Faraday's constant

= $195.65 mol \times 96500 C$

= $1.88 \times 10^{7}$ mol C

Relation between electrical energy and Q is as follows.

E = $Q \times V$

Hence, putting the given values into the above formula and then calculate the value of electricity as follows.

E = $Q \times V$

= $1.88 \times 10^{7} \times 5$

= $9.4 \times 10^{7} J$

As 1 J = $2.77 \times 10^{-7}$ kWh

Hence, $\frac{9.4 \times 10^{7}}{2.77 \times 10^{-7}}$ kWh

= 3.39 kWh

Thus, we can conclude that 3.39 kilowatt-hours of electricity is required in the given situation.

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4 years ago

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Which of the following elements is a metalloid?

Deffense [45]

The answer to your question would be silicon. I hope this helped!!!

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3 years ago

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