Electrical energy can be used to separate water into O2(g) and H2(g). In one demonstration of...

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Electrical energy can be used to separate water into O2(g) and H2(g). In one demonstration of...

Electrical energy can be used to separate water into O₂(g) and H₂(g). In one demonstration of this reaction, 17.00 mL of H₂ are collected over water at 25°C. Atmospheric pressure is 741.0 mmHg. How many grams of hydrogen are collected?

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Answer 1

Answer #1

the weight of hydrogen is calculated by gas law principle.

PV = nRT

where

P is the pressure of the gas, measured in atmospheric pressure
V is the volume of the gas, measured in litre
n is the amount of substance, measured in moles,
R is the ideal gas constant and
R=0.08205 L.atm/mol⋅K
T is the temperature of the gas, measured in Kelvins.

P + Pressure in HG mm,

V = volume in lit here 17 ml

T =temperature in kelvin here 25C.

R = constant of ideal gas

n = no of mole of hydrogen

the answer is calculated by putting the value of respective parameters

= .000677 mole

so multiplying this with hydrogen mol wt 2 = 0.00135 gm hydrogen

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Answer 2

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