How many molecules of amoxicillin are contained in a 760mg tablet? the answer should be in scientific notation?
2020-10-07 4:10 pm
How many molecules of amoxicillin (C16H19N3O5S, molar mass 365.4 g/mol) are contained in a 760−mg tablet? The answer should be provided in scientific notation.
回答 (2)
2020-10-07 4:36 pm
No. of moles of C₁₆H₁₉N₃O₅S = (760 × 10⁻³ g) / (365.4 g/mol) = 2.08 × 10⁻³ mol
Avogadro constant = 6.022 × 10²³ /mol
No. of molecules = (2.08 × 10⁻³ mol) × (6.022 × 10²³ molecules/mol) = 1.25 × 10²¹ molecules
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OR:
(760 mg C₁₆H₁₉N₃O₅S) × (1 mol C₁₆H₁₉N₃O₅S / 365.4 × 1000 mg C₁₆H₁₉N₃O₅S) × (6.022 × 10²³ C₁₆H₁₉N₃O₅S molecules / 1 mol C₁₆H₁₉N₃O₅S)
= 1.25 × 10²¹ C₁₆H₁₉N₃O₅S molecules
Avogadro constant = 6.022 × 10²³ /mol
No. of molecules = (2.08 × 10⁻³ mol) × (6.022 × 10²³ molecules/mol) = 1.25 × 10²¹ molecules
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OR:
(760 mg C₁₆H₁₉N₃O₅S) × (1 mol C₁₆H₁₉N₃O₅S / 365.4 × 1000 mg C₁₆H₁₉N₃O₅S) × (6.022 × 10²³ C₁₆H₁₉N₃O₅S molecules / 1 mol C₁₆H₁₉N₃O₅S)
= 1.25 × 10²¹ C₁₆H₁₉N₃O₅S molecules
2020-10-07 4:15 pm
760 mg X (1g/1000mg) X (1mol/365.4g) X (6.022x10^23 molecules/mol) =
.... use a calculator .. this will give the answer
.... use a calculator .. this will give the answer
收錄日期: 2021-04-24 08:03:21
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