In a mixture with nA = 4 mol and nB = 1 mol, what is xA?

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Prepare for the NANTeL Chemistry Certification and Engineering Fundamentals Test with multiple choice questions, detailed explanations, and key insights to boost your understanding and confidence. Ace your exam!

Multiple Choice

In a mixture with nA = 4 mol and nB = 1 mol, what is xA?

Explanation:
Mole fraction represents the share of a component in the mixture based on moles: x_A = n_A / (n_A + n_B). With n_A = 4 and n_B = 1, the total moles are 5, so x_A = 4/5 = 0.8. Therefore, the correct value is 0.80, the fraction of the total moles that come from A.

Mole fraction represents the share of a component in the mixture based on moles: x_A = n_A / (n_A + n_B). With n_A = 4 and n_B = 1, the total moles are 5, so x_A = 4/5 = 0.8. Therefore, the correct value is 0.80, the fraction of the total moles that come from A.

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