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M.In two moles of acetaldehyde (CH3 CHO) calculate the following

a. Number of moles of carbon

b. Number of moles of hydrogen

c. Number of moles of oxygen

d. Number of molecules of acetaldehyde
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a)  Number of moles of carbon

1 molecule of CH3CHO contains 2 C-atoms.

Therefore, 2 mol of CH3CHO contains 2×2 = 4 moles of Carbon.

 

b)  Number of moles of hydrogen

1 molecule of CH3CHO contains 4 H-atoms.

Therefore, 2 mol of CH3CHO contains 2×4 = 8 moles of Hydrogen.

 

c) Number of moles of oxygen

1 molecule of CH3CHO contains 1 O-atom.

Therefore, 2 mol of CH3-CHO contains 2×1 = 2 moles of Carbon.

 

d)  Number of molecules of acetaldehyde​

1 mole of acetaldehyde contains 6.022×1023 molecules,

as 2 mol will contain 2×6.022×1023 = 1.2044×1024 Acetaldehyde molecules.

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