4 years ago

What made alchemy unscientific in its practices?

Chemistry

2 answers:

anzhelika [568]4 years ago

7 0

(B) because it couldn’t turn in to good

raketka [301]4 years ago

6 0

Answer:

Explanation:

science is basically must base on the

evidence and experiment which

alchemy usually don't do these things

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denis23 [38]

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elixir [45]

Answer:

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3 years ago

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ASHA 777 [7]

Answer: The moles of melatonin are 0.000043

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number $6.023\times 10^{23}$ of particles.

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}$

Given mass of melatonin = 0.01 g

Molar mass of melatonin $(C_{13}H_{16}N_2O_2)$ = 232.28 g/mol

$\text{Number of moles of melatonin}=\frac{0.01 g}{232.28g/mol}=0.000043mol$

Thus the moles of melatonin in 0.01 g are 0.000043

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3 years ago