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Dima020 [189]
2 years ago
11

THE GEOCENTRIC MODEL

Chemistry
1 answer:
Mars2501 [29]2 years ago
6 0

Answer:

C

Explanation:

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Morphine is a well known pain killer but is highly addictive. The lethal dose of morphine varies from person to person based on
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0.252 milimoles

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To convert mass of a substance to moles it is necessary to use the molar mass of the substance.

The formula of morphine is C₁₇H₁₉NO₃, thus, its molar mass is:

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H: 19*1.01g/mol = 19.19g/mol

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O: 3*16g/mol = 48g/mol.

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Thus, moles of 71.891 mg = 0.071891g:

0.071891g × (1mol / 285.36g) = 2.5193x10⁻⁴ moles

As 1 mole = 1000 milimoles:

2.5193x10⁻⁴ moles = <em>0.252 milimoles</em>

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