3 years ago

Help me please Iknow it's easy but I need answers asap

Chemistry

1 answer:

Ne4ueva [31]3 years ago

5 0

Answer:

1-if u are answering light waves question , then the answer is translucent mirror or objects

2- Oxygen

3- compass

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he heat of fusion of tetrahydrofuran is . Calculate the change in entropy when of tetrahydrofuran melts at . Be sure your answer

lana [24]

Answer:

$\Delta S=1.8x10^{-3}\frac{kJ}{K}=1.8\frac{J}{K}$

Explanation:

Hello.

In this case, given the heat of fusion of THF to be 8.5 kJ/mol and freezing at -108.5 °C, for the required mass of 5.9 g, we can compute the entropy as:

$\Delta S=\frac{n*\Delta H}{T}$

Whereas n accounts for the moles which are computed below:

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Thus, the entropy turns out:

$\Delta S=\frac{0.0819mol*8.5 kJ/mol}{(-108.5+273.15)K}\\\\\Delta S=1.8x10^{-3}\frac{kJ}{K}=1.8\frac{J}{K}$

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Will you be my Magnesium, Silver, Nitrogen but "9.8m/s²" is silent? <br> Please help me here

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2 years ago

Help me please Iknow it's easy but I need answers asap ​

Help me please Iknow it's easy but I need answers asap