I only knew a few of these:
1. Curium
2. Copper
8. Iron
11. Barium
13. Zinc
14. Europium
29. Au (gold)
Answer:
Cost
Explanation:
The cost of purchasing a solar system is high so it serves as a great disadvantage.
Explanation:
The combustion of ethanol is best represented by the equation below:
C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O + heat
Combustion process is very common among hydrocarbons.
Ethanol is an alcohol and in the presence of oxygen it will combust.
In combustion heat energy is always released into the environment.
C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O + heat
We see that ethanol combines with oxygen to give carbon dioxide and water in the reaction above.
The heat produced signifies that the reaction is exothermic in nature.
learn more:
Combustion brainly.com/question/11200282
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The answer is C: A surfer rides back to the beach on his surf board.
All the others are examples of people doing stuff to the water, C is an example of the water moving something, in this case the water is moving a surfer and his surf board.
Answer:
The answer is "3".
Explanation:
acetic acid Dissociation:
Dissociation constant of the Ka:
![Ka = \frac{[CH3COO^{-}] [H^{+}]}{[CH_3COOH]}\\\\](https://tex.z-dn.net/?f=Ka%20%3D%20%5Cfrac%7B%5BCH3COO%5E%7B-%7D%5D%20%5BH%5E%7B%2B%7D%5D%7D%7B%5BCH_3COOH%5D%7D%5C%5C%5C%5C)
using the ICE table:
x is negligible compared to Ka.
![1.8\times 10^{-5} = \frac{x^2}{0.10}\\\\x^2 = 1.8 \times 10^{-6}\\\\x = 1.34 \times 10^{-3}\\\\pH = -\log [H^{+}]](https://tex.z-dn.net/?f=1.8%5Ctimes%2010%5E%7B-5%7D%20%3D%20%5Cfrac%7Bx%5E2%7D%7B0.10%7D%5C%5C%5C%5Cx%5E2%20%3D%201.8%20%5Ctimes%2010%5E%7B-6%7D%5C%5C%5C%5Cx%20%3D%201.34%20%5Ctimes%2010%5E%7B-3%7D%5C%5C%5C%5CpH%20%3D%20-%5Clog%20%5BH%5E%7B%2B%7D%5D)
From the ICE table, ![[H^{+}] = x = 1.34 \times 10^{-3}](https://tex.z-dn.net/?f=%5BH%5E%7B%2B%7D%5D%20%3D%20x%20%3D%201.34%20%5Ctimes%2010%5E%7B-3%7D)
