Question

A chemist will use a sample of 30 g of ethanol (ch3ch2oh) in an experiment. in one to two sentences, make and justify a claim about the number of moles of ethanol the chemist will use.

Answer 1

The number of mole of ethanol, CH₃CH₂OH the chemist will use in the experiment is 0.65 mole

Description of mole

The mole of a substance is related to it's mass and molar mass according to the following equation:

Mole = mass / molar mass

How to determine the mole of CH₃CH₂OH

From the question given above, the following data were obtained:

• Mass of CH₃CH₂OH = 30 g
• Molar mass of CH₃CH₂OH = 12 + (1×3) + 12 + (1×2) + 16 + 1 = 46 g/mol

• Mole of CH₃CH₂OH =?

Mole = mass / molar mass

Mole of CH₃CH₂OH = 30 / 46

Mole of CH₃CH₂OH = 0.65 mole

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