2 years ago

Is mixing salt and pepper physical or chemical change ?

1 answer:

8 0

Physical change I think

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bezimeni [28]

Answer:

Explanation:

In weight/volume (w/v) terms,

1 ppm = 1g m-3 = 1 mg L-1 = 1 μg mL-1

200 mL = 0.2 L

15 / 0.2 mg L-1 =75 ppm

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2 years ago

iris [78.8K]

Answer: P= 1.64 atm

Explanation: solution attached.

Use Ideal gas law

PV= nRT

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P= nRT/V R= 0.08205 L.atm/mol.K

Substitute the values.

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irinina [24]

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dem82 [27]

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aev [14]

Answer:

19 protons, 20 neutrons and 18 electrons.

Explanation:

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