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hoa [83]
3 years ago
7

What does it mean for an object to be dense?

Chemistry
1 answer:
Sedbober [7]3 years ago
4 0

Answer: Density is a measure

Explanation:  The more squashed together an object’s particles are, the denser it is.

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A solution is made by mixing 37.g of thiophene C4H4S and 72.g of heptane C7H16. Calculate the mole fraction of thiophene in this
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Answer:

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Explanation:

Molar mass of thiophene= 84g/mol

Mass of thiophene = 37g

Number of moles= 37/84= 0.44 moles

Molar mass of heptane= 100 g/mol

Mass of heptane = 72g

Number of moles = 72/100= 0.72 moles

Total number of moles= 0.44 + 0.72= 1.16 moles

mole fraction of thiophene = 0.44/1.16= 0.38

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