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Anettt [7]
3 years ago
9

A chemistry student needs 40.0 mL of pentane for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the stu

dent discovers that the density of pentane is 0.626 g cm^3. Calculate the mass of pentane the student should weigh out.
Chemistry
1 answer:
Alenkinab [10]3 years ago
5 0

Answer:

25.04 g is the mass of pentane

Explanation:

Pentane density = Pentane mass / Pentane volume

1 cm³ = 1mL

0.626 g/mL = Pentane mass / Pentane volume

0.626 g/mL = Pentane mass / 40 mL

0.626 g/mL . 40 mL = Pentane mass → 25.04 g

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Answer:

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3 years ago
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Answer:

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RbOH  → Rb⁺ +  OH⁻

As the hydroxide can gives the OH⁻ in water, it is considered as an Arrhenius's base

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