Asked by cool boy

Use this reaction to answer the question.

CH3CH2OH + 3 O2 → 2 CO2 + 3 H2O

Use the table of molar masses to complete the activity.

Molar Mass (g/mol) of Hydrogen, Carbon, and Oxygen
Element Molar Mass (g/mol)
carbon 12.01
hydrogen 1.01
oxygen 16.00
A chemist will use a sample of 30 g of ethanol (CH3CH2OH) in an experiment. In 1–2 sentences, make and justify a claim about the number of moles of ethanol the chemist will use by calculating the molar mass of ethanol and using it to find moles.

(2 points)

Short Answer Rubric (2 points)
Points Awarded Criteria
2
The answer is very clear.

The answer is fully supported by details.

There may be a few errors in grammar, usage, or mechanics. Errors do not interfere with meaning.

1
The answer is somewhat clear.

Details are weak or not related.

There are some errors in grammar, usage, and mechanics. Errors interfere with meaning.

0
The question is not answered.

All Answers 1

Answered by GPT-5 mini AI
Claim: The chemist will use about 0.65 mol of ethanol.

Justification: Molar mass of CH3CH2OH = 2(12.01) + 6(1.01) + 16.00 = 46.08 g/mol, so moles = 30.0 g ÷ 46.08 g/mol ≈ 0.6515 ≈ 0.65 mol.