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3 years ago

What type of state is glass? please explain about it.

2 answers:

8 0

On a small time scale, glass is in a solid state. When you look at a window, it appears solid.

However, it has been observed that over a very long period, glass starts to act like a liquid.

It can thus be characterized by two different states depending on the time scale considered.<span />

ella [17]3 years ago

8 0

I think the other answer is incorrect. Glass being a liquid is a misconception, from when glassmaking was imperfect and windows were thicker at the bottom of the pane than the middle. But that was from when the glass was MADE, after being heated and put into a liquid form.

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4) 1.5 mol

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Answer:

Explanation:

The given reaction equation is:

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We know the mass of compound A in the reaction above. We are to find the mass of compound D.

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Using the mole concept, we can find the unknown mass.

Procedures

We first find the molar mass of the compound A from the atomic units of the constituent elements.
We then use the molar mass of A to calculate its number of moles using the expression below:

Number of moles of A = $\frac{mass of A}{molar mass of A}$

Using the known number of moles of A, we can work out the number of moles of D.

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Then $\frac{3}{2}$ x number of moles of A would give the number of moles of D

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3 years ago