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zloy xaker [14]
3 years ago
6

What must the melting point of the mold be compared to the temperature at which class get soft and why

Chemistry
1 answer:
stiv31 [10]3 years ago
7 0

The answer is that the mold melting point must be higher then molten glass, otherwise the mold would melt when molten glass is poured into it .


I hope this helps :)

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A system gains 687 kJ of heat, resulting in a change in internal energy of the system equal to 156 kJ. How much work is done?
Maslowich

Answer:

w = -531 kJ

1. Work was done by the system.

Explanation:

Step 1: Given data

  • Heat gained by the system (q): 687 kJ (By convention, when the system absorbs heat, q > 0).
  • Change in the internal energy of the system (ΔU°): 156 kJ

Step 2: Calculate the work done (w)

We will use the following expression.

ΔU° = q + w

w = ΔU° - q

w = 156 kJ - 687 kJ

w = -531 kJ

By convention, when w < 0, work is done by the system on the surroundings.

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2 years ago
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Given:

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pH = 6.25 + log 0.3045/ 0.3035 = 6.25 is the ph buffer prepared.

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3 years ago
A brownish haze that is a mixture of ozone and other chemicals, formed when pollutants react with each other in the presence pf
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Scientific laws are natural laws and they hold true.

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experiment brainly.com/question/5096428

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