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choli [55]
3 years ago
12

Which of the following is a definition of glass transition temperature?

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

Answer:

The temperature at which a glass transforms from a liquid to solid.

Explanation:

Glass transition temperature is defined for polymers, so is the temperature at above which the soft and ductile polymer changes into hard britle material. It basically increases the viscosity of the material. Glass transition temperature is less than the melting point temperature. So, the polymer initially showing liquid like characteristics after transition temperature shows solid like characteristics.

So, the correct answer is

The temperature at which a glass transforms from a liquid to solid.

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Potassium cyanide is a toxic substance, and the median lethal dose depends on the mass of the person or animal that ingests it.
Artemon [7]

Answer:

88,7 mL of solution

Explanation:

Molarity (Represented as M) is an unit of chemical concentration that is defined as the ratio between moles of solute per liters of solution, that is:

Molarity = moles of solute / Liters of solution

If molarity of KCN solution is 0,0820M and moles of KCN are 7,27x10⁻³ moles:

0,0820M = 7,27x10⁻³ moles / Liters of solution

Liters of solution = 0,0887L = <em>88,7 mL of solution</em>

I hope it helps!

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Answer:

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Explanation:

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