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3 years ago

What is the mass of a steel cylinder that has a density of 75.0 g/mL and a volume of 12 mL?

Chemistry

2 answers:

yan [13]3 years ago

8 0

M(steel)= 75 g/mL · 12 mL = 900 g.

bixtya [17]3 years ago

6 0

6.25 grams because the formula is D/V=M so 75/12=6.25

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3 years ago

the heat of fusion of acetone is 5.7 kJ/mol. Calculate to two significant figures the entropy change when 6.3 mol of acetone mel

shtirl [24]

Answer: The entropy change of the process is $2.0\times 10^2J/K$

Explanation:

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$\Delta S=n\times \frac{\Delta H_{f}}{T}$

where,

$\Delta S$ = Entropy change

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$\Delta H_{f}$ = enthalpy of fusion = 5.7 kJ/mol = 5700 J/mol (Conversion factor: 1 kJ = 1000 J)

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Putting values in above equation, we get:

$\Delta S=\frac{6.3mol\times 5700J/mol}{178.3K}\\\\\Delta S=201.4J/K=2.0\times 10^2J/K$

Hence, the entropy change of the process is $2.0\times 10^2J/K$

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3 years ago

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ki77a [65]

$Cu_4(OH)_6(SO_4)$

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