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JulijaS [17]
3 years ago
14

A piece of asphalt has a volume of 5.0 cm3 and a mass of 7.5 g. What is the density of the asphalt?

Chemistry
1 answer:
strojnjashka [21]3 years ago
6 0
Density = mass / volume
Density = 7.5 g / 5.0 cm3
Density = 1.5 g/cm3
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What is the mole fraction of O2O2 in a mixture of 15.1 gg of O2O2, 8.19 gg of N2N2, and 2.46 gg of H2H2
SVETLANKA909090 [29]

Answer:

Mole fraction O₂=  0.43

Explanation:

Mole fraction is the moles of gas/ total moles.

Let's determine the moles of each:

Moles O₂ → 15.1 g / 16 g/mol = 0.94

Moles N₂  →  8.19 g / 14 g/mol = 0.013

Moles H₂  → 2.46 / 2 g/mol = 1.23

Total moles = 2.183

Mole fraction O₂= 0.94 / 2.183 → 0.43

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irina [24]
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lesantik [10]

Answer:

-0.276 Degrees C

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Since its freezinf point depression the freezing point will lower

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0-.276= -.276

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Answer:

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Answer:

The answer is B.

Explanation:

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