Answer:
D) Cool air is warming quickly.
Explanation:
d is the answer.
The reaction between NaOH and Cu(NO₃)₂ is as follows
2NaOH + Cu(NO₃)₂ ---> 2NaNO₃ + Cu(OH)₂
Q1)
stoichiometry of NaOH to Cu(NO₃)₂ is 2:1
this means that 2 mol of NaOH reacts with 1 mol of Cu(NO₃)₂
the mass of Cu(NO₃)₂ reacted - 0.8024 g
molar mass of Cu(NO₃)₂ is 187.56 g/mol
therefore the number of Cu(NO₃)₂ moles that have reacted
- 0.8024 g/ 187.56 g/mol = 0.00427 mol
according to the stoichiometry , number of NaOH moles - 0.00427 mol x 2
then number of NaOH moles that have reacted - 0.00855 mol
In a 3.0 M NaOH solution, 3 moles are in 1000 mL of solution
Then volume required for 0.00855 mol - 1000 x 0.00855 /3 = 2.85 mL
2.85 mL of 3.0 M NaOH is required for this reaction
Q2)
Assuming that there's 100 % yield of Cu(OH)₂ , we can directly calculate the mass of Cu(OH)₂ formed from the number of moles of reactants that were used up.
Stoichiometry of Cu(NO₃)₂ to Cu(OH)₂ is 1:1
this means that 1 mol of Cu(NO₃)₂ gives a yield of 1 mol of Cu(OH)₂
the number of Cu(NO₃)₂ moles that reacted - 0.00427 mol
Therefore an equal amount of moles of Cu(OH)₂ were formed
Then amount of Cu(OH)₂ moles produced - 0.00427 mol
Mass of Cu(OH)₂ formed - 0.00427 mol x 97.56 g/mol = 0.42 g
A mass of 0.42 g of Cu(OH)₂ was formed in this reaction
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)
Answer:
In general, the number of valence electrons is the same within a column and increases from left to right within a row. Group 1 elements have just one valence electron and group 18 elements have eight, except for helium, which has only two electrons total.
Explanation:
Photosynthesis is the process whereby green plants uses light energy to manufacture food using carbon dioxide and water to produce energy rich glucose and oxygen gas as a bye - product.
The equation is given below:
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
In the reaction above, the number of moles are:
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
6 6 1 6
The reaction shows that 6 moles of carbon dioxide combines with 6 moles of water to give one mole of glucose and 6 moles of oxygen gas;
We can say that:
To produce 1 mole of glucose, we need 6 moles of carbon dioxide
1 mole of glucose, we need 6 moles of water
6 moles of oxygen gas we need 6 moles of carbon dioxide
6 moles of oxygen gas we need 6 moles of water molecules
learn more:
Photosynthesis brainly.com/question/2761166
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