Answer:
pyruvic acid changes to alcohol and carbon dioxide.
Explanation:
In lactic acid fermentation, pyruvic acid from glycolysis changes to lactic acid. This type of fermentation is carried out by the bacteria in yogurt, and by your own muscle cells.
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Answer: 1080
Explanation:
you have to subtract 40 from 13 frist then multiply the remins of the temeture with 40 and your answer is 1080
I think it is D
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Answer: The molarity of each of the given solutions is:
(a) 1.38 M
(b) 0.94 M
(c) 1.182 M
Explanation:
Molarity is the number of moles of a substance present in liter of a solution.
And, moles is the mass of a substance divided by its molar mass.
(a) Moles of ethanol (molar mass = 46 g/mol) is as follows.
![Moles = \frac{mass}{molar mass}\\= \frac{28.5 g}{46 g/mol}\\= 0.619 mol](https://tex.z-dn.net/?f=Moles%20%3D%20%5Cfrac%7Bmass%7D%7Bmolar%20mass%7D%5C%5C%3D%20%5Cfrac%7B28.5%20g%7D%7B46%20g%2Fmol%7D%5C%5C%3D%200.619%20mol)
Now, molarity of ethanol solution is as follows.
![Molarity = \frac{moles}{Volume (in L)}\\= \frac{0.619 mol}{4.50 \times 10^{2} \times 10^{-3}L}\\= 1.38 M](https://tex.z-dn.net/?f=Molarity%20%3D%20%5Cfrac%7Bmoles%7D%7BVolume%20%28in%20L%29%7D%5C%5C%3D%20%5Cfrac%7B0.619%20mol%7D%7B4.50%20%5Ctimes%2010%5E%7B2%7D%20%5Ctimes%2010%5E%7B-3%7DL%7D%5C%5C%3D%201.38%20M)
(b) Moles of sucrose (molar mass = 342.3 g/mol) is as follows.
![Moles = \frac{mass}{molar mass}\\= \frac{21.6 g}{342.3 g/mol}\\= 0.063 mol](https://tex.z-dn.net/?f=Moles%20%3D%20%5Cfrac%7Bmass%7D%7Bmolar%20mass%7D%5C%5C%3D%20%5Cfrac%7B21.6%20g%7D%7B342.3%20g%2Fmol%7D%5C%5C%3D%200.063%20mol)
Now, molarity of sucrose solution is as follows.
![Molarity = \frac{moles}{Volume (in L)}\\= \frac{0.063 mol}{0.067 L} (1 mL = 0.001 L)\\= 0.94 M](https://tex.z-dn.net/?f=Molarity%20%3D%20%5Cfrac%7Bmoles%7D%7BVolume%20%28in%20L%29%7D%5C%5C%3D%20%5Cfrac%7B0.063%20mol%7D%7B0.067%20L%7D%20%20%281%20mL%20%3D%200.001%20L%29%5C%5C%3D%200.94%20M)
(c) Moles of sodium chloride (molar mass = 58.44 g/mol) are as follows.
![Moles = \frac{mass}{molar mass}\\= \frac{6.65 g}{58.44 g/mol}\\= 0.114 mol](https://tex.z-dn.net/?f=Moles%20%3D%20%5Cfrac%7Bmass%7D%7Bmolar%20mass%7D%5C%5C%3D%20%5Cfrac%7B6.65%20g%7D%7B58.44%20g%2Fmol%7D%5C%5C%3D%200.114%20mol)
Now, molarity of sodium chloride solution is as follows.
![Molarity = \frac{moles}{Volume (in L)}\\= \frac{0.114 mol}{0.0962 L}\\= 1.182 M](https://tex.z-dn.net/?f=Molarity%20%3D%20%5Cfrac%7Bmoles%7D%7BVolume%20%28in%20L%29%7D%5C%5C%3D%20%5Cfrac%7B0.114%20mol%7D%7B0.0962%20L%7D%5C%5C%3D%201.182%20M)
Thus, we can conclude that the molarity of each of the given solutions is:
(a) 1.38 M
(b) 0.94 M
(c) 1.182 M
Answer:
Explanation:
The properties of covalent bonds are:
1. Low boiling points and melting points.
2. Various colors.
3. Poor conductors of heat and electricity.
4. Brittle solids.