Answer:
It changes into a liquid because when it gets heated up to a certain temperature, it reaches it's "boiling point", which is when it will start to transform into a liquid because the temperature is too hot for it to remain a solid.
Explanation:
Just think of when icicles melt because of the sun. The sun is heating them up and it gets too warm to the point that it liquidizes.
Conductivity or metalloid
A solution's pH will be a number between 0 and 14. A solution with a pH of 7 is classified as neutral. If the pH is lower than 7, the solution is acidic. When pH is higher than 7, the solution is basic. These numbers describe the concentration of hydrogen ions in the solution and increase on a negative logarithmic scale. For example, If Solution A has a pH of 3 and Solution B has a pH of 1, then Solution B has 100 times as many hydrogen ions than A and is therefore 100 times more acidic.
A. 1 valence electron
b. 4 valence electrons
c. 2 valence electrons
d. 6 valence electrons
Answer:
The mass percentage of the solution is 10.46%.
The molality of the solution is 2.5403 mol/kg.
Explanation:
A bottle of wine contains 12.9% ethanol by volume.
This means that in 100 mL of solution 12.9 L of alcohol is present.
Volume of alcohol = v = 12.9 L
Mass of the ethanol = m
Density of the ethanol ,d= ![0.789 g/cm^3=0.789 g/mL](https://tex.z-dn.net/?f=0.789%20g%2Fcm%5E3%3D0.789%20g%2FmL)
![1 cm^3=1 mL](https://tex.z-dn.net/?f=1%20cm%5E3%3D1%20mL)
![m=d\times v=0.798 g/ml\times 12.9 mL = 10.1781 g](https://tex.z-dn.net/?f=m%3Dd%5Ctimes%20v%3D0.798%20g%2Fml%5Ctimes%2012.9%20mL%20%3D%2010.1781%20g)
Mass of water = M
Volume of water ,V= 100 mL - 12.9 mL = 87.1 mL
Density of water = D=1.00 g/mL
![M=D\times V=1.00 g/ml\times 87.1 mL =87.1 g](https://tex.z-dn.net/?f=M%3DD%5Ctimes%20V%3D1.00%20g%2Fml%5Ctimes%2087.1%20mL%20%3D87.1%20g)
Mass percent
![(w/w)\%=\frac{m}{m+M}\times 100](https://tex.z-dn.net/?f=%28w%2Fw%29%5C%25%3D%5Cfrac%7Bm%7D%7Bm%2BM%7D%5Ctimes%20100)
![\frac{10.1781 g}{10.1781 g+87.1 g}\times 100=10.46\%](https://tex.z-dn.net/?f=%5Cfrac%7B10.1781%20g%7D%7B10.1781%20g%2B87.1%20g%7D%5Ctimes%20100%3D10.46%5C%25)
Molality :
![m=\frac{m}{\text{molar mass of ethanol}\times M(kg)}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7Bm%7D%7B%5Ctext%7Bmolar%20mass%20of%20ethanol%7D%5Ctimes%20M%28kg%29%7D)
M = 87.1 g = 0.0871 kg (1 kg =1000 g)
![=\frac{10.1781 g}{46 g/mol\times 0.0871 kg}](https://tex.z-dn.net/?f=%3D%5Cfrac%7B10.1781%20g%7D%7B46%20g%2Fmol%5Ctimes%200.0871%20kg%7D)
![m=2.5403 mol/kg](https://tex.z-dn.net/?f=m%3D2.5403%20mol%2Fkg)