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klasskru [66]
2 years ago
8

Please help, I don't know the formulas to do these and I'd like to know HOW y'all get the answers...thank you so much.

Chemistry
1 answer:
Yuki888 [10]2 years ago
6 0

The vapour pressure in the water flask is 23.686 torr.

The pressure of H_2 in the flask was 713.514  torr.

Pressure is the H_2 exerting in the flask is 688.314 torr

<h3>What is vapour pressure?</h3>

Vapour pressure is a measure of the tendency of a material to change into the gaseous or vapour state, and it increases with temperature.

a.The vapour pressure of water is given by:

Log_{10} P =A- \frac{B}{C+T}, where T is in degree Celcius, P is in torr.

For 0-100 degree celcius, A=8.07131, B=1730.63, C=233.426

Log_{10} P = 8.07131 - \frac{1730.63}{233.426+25} =1.3745

As T =25 degree celcius

P = 10^{1.3745} torr =23.686 torr

b.We know that P_{total} =P_{H_2} + P_{H_2O}

P_{total} = Atmospheric pressure

737.2 torr = P_{H_2} +23.686 torr

P_{H_2}  = 713.514  torr

c.After there is a leak in the gas collection tube, the amount at pressure due to water vapour remains unchanged as it is a quantity dependent on temperature.

P_{total} =P_{H_2} + P_{H_2O} + P_{leaking \;air}

737.2 torr = P_{H_2} + 23.686 torr + 25.2 torr

P_{H_2} =688.314 torr

For calculating molar mass of any gas:

M= Density X (RT ÷ P)

M= 0.714 g X (8.314 J mol^{-1}K^{-1}273 K ÷ 101325 Pa)

M= 15.994 g/mol = 16 g/mol.

Learn more about vapour pressure here:

brainly.com/question/15740895

#SPJ1

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Explanation:

What is the identity of the atom shown?

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Explanation:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.

In given picture it can be seen that there are 17 protons and 18 neutrons are present with in nucleus it means atomic mass is 35 amu and 17 electrons are present out side the nucleus it means its atomic number of 17.

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Elements in the same group/family of the periodic table are similar in what way?

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The elements in the same group have similar properties due to same number of valance electrons. For example

Consider the group two. It is alkaline earth metals's group. It consist of six members Beryllium, Magnesium, Calcium, Strontium, Barium and radium. All these have two valance electrons.

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