QuestionApril 18, 2026

What is the mass of 4.10times 10^23 molecules of hydrochloric acid (HCl) ? (round to two decimal places) typeyouranswer grams of HCI

What is the mass of 4.10times 10^23 molecules of hydrochloric acid (HCl) ? (round to two decimal places) typeyouranswer grams of HCI
What is the mass of 4.10times 10^23 molecules of hydrochloric acid (HCl) ? (round to two decimal places) typeyouranswer grams of HCI

Solution
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Answer

24.79 grams of HCl Explanation 1. Calculate moles of HCl Use **n = \frac{N}{N_A}**, where N_A = 6.022\times 10^{23}. n = \frac{4.10\times 10^{23}}{6.022\times 10^{23}} \approx 0.680 mol. 2. Find molar mass of HCl H: 1.008 g/mol, Cl: 35.45 g/mol → Molar mass = 36.458 g/mol. 3. Calculate mass Use **m = n \times M**. m = 0.680 \times 36.458 \approx 24.79 g.

Explanation

1. Calculate moles of HCl <br /> Use **$n = \frac{N}{N_A}$**, where $N_A = 6.022\times 10^{23}$. <br />$n = \frac{4.10\times 10^{23}}{6.022\times 10^{23}} \approx 0.680$ mol.<br /><br />2. Find molar mass of HCl <br /> H: 1.008 g/mol, Cl: 35.45 g/mol → Molar mass $= 36.458$ g/mol.<br /><br />3. Calculate mass <br /> Use **$m = n \times M$**. <br />$m = 0.680 \times 36.458 \approx 24.79$ g.
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