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Mademuasel [1]
3 years ago
14

Which equation represents the combined gas law?

Chemistry
2 answers:
aksik [14]3 years ago
7 0

The correct option is P1V1 / T1 = P2V2 /T2.

The combine gas law states that the ratio of the product of pressure, volume and absolute temperature of a gas is always a constant. Mathematically, the law is represented by P1V1 / T1 = P2V2 /T2; where

P1 and P2 = Initial and final pressure of the gas

V1 and V2 = Initial volume and the final volume of the gas

T1 and T2 = Initial temperature and final temperature of the gas.

Combine gas law was formed by the combination of Boyle's law, Charles' law and Gay Lussac's law.

Artist 52 [7]3 years ago
5 0

Explanation :

<em>Combined gas law comes from the combination of Boyle's law, Charles law and Gay Lussac's law.</em>

According to Boyle's law,

At constant temperature, pressure of a gas is inversely proportional to its volume.

i.e. P\propto\dfrac{1}{V}

PV=constant..........(1)

Where,

P is the pressure of gas

V is the volume of gas

According to Charles law,

At constant pressure, volume of a gas is directly proportional to its temperature.

i.e. V\propto T

\dfrac{V}{T}=constant..............(2)

Where, T is the temperature.

According to Gay Lussac's law,

At constant volume, pressure of gas is directly proportional to its temperature.

i.e. P\propto T

\dfrac{P}{T}=constant..............(3)

Combining equation (1) (2) and (3)

\dfrac{PV}{T}=constant...............(4)

Equation (4) is the combined gas law.

Or, \dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}

So, correct option is (c).

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Explanation:

hope its correct

6 0
3 years ago
Which formula is an empirical formula?
poizon [28]
<h2>Hello!</h2>

The answer is:

The empirical formula is the option B. NH_{3}

<h2>Why?</h2>

The empirical formula of a compound is the simplest formula that can be written. On the opposite, the molecular formula involves a variant of the same compound, but it can be also simplified to an empirical formula.

MolecularFormula=n(EmpiricalFormula)

We are looking for a formula that cannot be simplified by dividing the number of molecules/atoms that conforms the compound.

Let's discard option by option in order to find which formula is an empirical formula (cannot be simplified)

A. N_{2}O_{4}

It's not an empirical formula, it's a molecular formula since it can be obtained by multiplying the empirical formula of the same compound.

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B. NH_{3}

It's an empirical formula since it cannot be obtained by the multiplication of a whole number and the simplest formula. It's the simplest formula that we can find of the compound.

C. C_{3}H_{6}

It's not an empirical formula, it's a molecular formula since it can be obtained by multiplying the empirical formula of the same compound.

C_{3}H_{6}=3(CH_{2})

D. P_{4}O_{10}

It's not an empirical formula, it's a molecular formula since it can be obtained by multiplying the empirical formula of the same compound.

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Hence, the empirical formula is the option B. NH_{3}

Have a nice day!

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