Answer: 2 moles of CO₂ are produced from reacting 2 moles of H₂CO with oxygen.
Explanation:
1) Chemical equation:
Formaldehyde + oxgyen → CO₂ + H₂O
H₂CO + O₂ → CO₂ + H₂O
2) That equation is already balanced
3) Mole ratios
1 mol H₂CO : 1 mol O₂ : 1 mol CO₂ : 1 mol H₂O
4) Then, every mol of mol of H₂CO produces 1 mol of CO₂ , which means that 2 moles of CO₂ are produced from reacting 2 moles of H₂CO with oxygen.
Answer:
His phraseology and his turns of invention are too empirically pseudoscientific for the simplicity of nature.
Answer: Option (c) is the correct answer.
Explanation:
Boiling point is the temperature at which vapor pressure of a liquid becomes equal to the atmospheric pressure.
More strong interactions present in the atoms of a compound more heat is required to break it. Hence, greater will be its boiling point.
In
there will be strong dipole-dipole interactions because this compound has hydrogen bonding. Whereas in
there is no hydrogen bonding taking place.
Hence,
will have weak interactions as compared to
. And, neon being a noble gas is stable in nature and does not react easily. Hence, it will have low boiling point.
Thus, we can conclude that given substances are placed in order of increasing boiling point as follows.
Ne <
<
Answer:
pH=4.63
Explanation:
The firt step is identify the <u>Acid</u> and the <u>conjugated base</u>:
HA <=>
+ ![H^+](https://tex.z-dn.net/?f=H%5E%2B)
So, for this case we will have:
<=>
+ ![H^+](https://tex.z-dn.net/?f=H%5E%2B)
Then:
HA = ![C_6H_5COOH](https://tex.z-dn.net/?f=C_6H_5COOH)
=![C_6H_5COO^-](https://tex.z-dn.net/?f=C_6H_5COO%5E-)
With this in mind we can use the <u>henderson-hasselbach equation</u>:
pH = pKa + Log ![\frac{A^-}{HA}](https://tex.z-dn.net/?f=%5Cfrac%7BA%5E-%7D%7BHA%7D)
We can calculate the <u><em>pKa</em></u> first
![pKa~=~-~Log~(6.30x10^-^5)~=~4.2](https://tex.z-dn.net/?f=pKa~%3D~-~Log~%286.30x10%5E-%5E5%29~%3D~4.2)
Then we can put the values in the equation:
pH = 4.2 + Log(
)
pH= 4.63