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kiruha [24]
3 years ago
6

What does the illustrated symbol on the element key mean?

Chemistry
1 answer:
Sveta_85 [38]3 years ago
4 0

Answer: Each element has a symbol,one or two letters that represent the element much as your initials represent you. The symbol of an element represents one atom of that element. For 14 of the elements, the symbol consists of one letter.

Explanation:

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A lead–tin alloy of composition 30 wt% Sn–70 wt% Pb is slowly heated from a temperature of 150°C (300°F).(a) At what temperature
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Answer:

a) 231.9 °C

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Explanation:

This is a mixture of two solids with different fusion point:

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<u>Given that Sn has a lower fusion temperature it will start to melt first at that temperature. </u>

So the first liquid phase forms at 231.9 °C and because Pb starts melting at a higher temperature, that phase's composition will be 100% Sn.

The mixture will be completely melted when you are a the higher melting temperature of all components (in this case Pb), so it will all in liquid phase at 327.5 °C.

At that temperature all Sn was already in liquid state and, therefore, the last solid's composition will be 100% Pb.

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Which corresponds to a pressure of 1.23 atm??
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