Answer:A
Explanation: because i saw the sheet
Answer:
Number of protons = 52, Number of electrons = 52, Number of neutrons = 76
Explanation:
Answer:
a) 231.9 °C
b) 100% Sn
c) 327.5 °C
d) 100% Pb
Explanation:
This is a mixture of two solids with different fusion point:
![Tf_{Pb}=327.5 C](https://tex.z-dn.net/?f=Tf_%7BPb%7D%3D327.5%20C)
![Tf_{Sn}=231.9 C](https://tex.z-dn.net/?f=Tf_%7BSn%7D%3D231.9%20C)
<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.