Need more information, what's #10?
I would say that it is answer choice J. This is because A-E is currently and utterly incorrect and will not be right.
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)
1. A 2. D 3. C 4. B are the answers
Answer:
argumentation is a necessary part of scientific inquiry.
Explanation: