Scientist Virchow noticed that cells were diving and noticed that living cells only sprung from other living cells. That led him to create “cell theory”, stating that every organism is made out of cells, all cells spring from other cells, and all life functions occur in cells.
Data:
<span>Volume = 144.2
ml = 0.1442 l
total pressure = 742 mmhg
temperature = 25°C.
mass of hydrogen gas (in mg) = ?
vapor
pressure of water is 23.78 mmhg at 25°C
Solution:
1) Partial pressure of hydrogen = total pressure - vapor pressure of water
Partial pressure of hydrogen = 742 mmHg - 23.78 mmHg = 718.22 mmHg
2) Number of moles of hydrogen
pV = nRT => n = (pV) / (RT)
R = 62.36367 mmHg * l / mol * K
n = (718.22 mmHg * 0.1442 l ) / (62.36367 mmHg*l /K*mol * 298.15K) = 0.00557 mol
3) mass of hydrogen (H2)
mass = number of moles * molar mass
molar mass of H2 = 2 * 1 g/mol = 2 g/mol
=> mass = 2 g/mol * 0.00557 mol = 0.01114 g. = 11.14 mg
Answer: 11.14 mg
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