In two moles of acetaldehyde (CH3CHO) calculate the following : a. Number of moles of carbon b. Number of moles of hydrogen

Question

In two moles of acetaldehyde (CH3CHO) calculate the following : a. Number of moles of carbon b. Number of moles of hydrogen

In two moles of acetaldehyde (CH₃CHO) 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

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Molecular formula of acetaldehyde : C₂H₄O

Moles of acetaldehyde = 2 mol

a. Number of moles of carbon atoms = Moles of acetaldehyde × Number of carbon atoms

= 2 × 2

= 4 moles of carbon atoms

b. Number of moles of hydrogen atoms = Moles of acetaldehyde × Number of hydrogen atoms

= 2 × 4

= 8 moles of hydrogen atoms

c. Number of moles of oxygen atoms = Moles of acetaldehyde × Number of oxygen atoms

= 2 × 1

= 2 moles of oxygen atoms

d. Number of molecules of acetaldehyde = Moles of acetaldehyde × Avogadro number = 2 mol × 6.022 × 10²³ molecules/mol = 12.044 × 10²³ molecules of acetaldehyde

∴ i. Number of moles of carbon, hydrogen and oxygen are 4, 8, 2 respectively.

ii. Number of molecules of acetaldehyde = 12.044 × 10²³