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USPshnik [31]
3 years ago
10

How many atoms of phosphorus are in a 0.859 g sample? Answer in units of atoms.

Chemistry
1 answer:
bekas [8.4K]3 years ago
3 0
Moles = Mass(g) / ar
Moles of phosphorus = 0.859 / 31
= 0.0277096774

1 mole = 6.02 × 10^23

Atoms of phosphorus = 0.0277096774 × 6.02×10^23
=ans.

sorry i cant do the calculation. I dont have a calculator with me.
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Answer:

Q sln = 75.165 J

Explanation:

a constant pressure calorimeter:

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specific heat (C):

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heat absorbed (Q):

⇒ Q sln = (4.3966 g)(4.18 J/g°C)(4.09°C)

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