Answer:
option d
Explanation:
chemical potential energy
Answer:
e. HCOOH and NaCHOO
Explanation:
For a buffer solution, both an acid and its conjugate base are required.
With the information above in mind, we can<em> discard options a) and c</em>), as those combinations are not of an acid and its conjugate base.
Now it is a matter of <u>comparing the pKa (found in literature tables) of the acids of the remaining three acids</u>:
The acid with the <u>pKa closest to the desired pH</u> is HCOOH, so the correct answer is e. HCOOH and NaCHOO
Answer:
2.3 L
Explanation:
when you have this eqaution you use P1V1T2=P2V2T1.
since you are looking for volume of gas cylinder that means you are looking for V2.
so you have your given P= 1.0 atm, V=2.5L, T=298K.
They ask you to use STP or standard pressure and temperature.
STP P= 1atm, STP T=273 K
so you are looking for V2 meaning you are going to get V alone so your new equation is P1*V1*TS/ P2* T1= V2
so you now substitue so its now 1*273*2.5/ 1* 298= V
682.5/ 298= V
Lastly V= 2.2902 and you round to tenths so now you have
V= 2.3 L
Answer: Correct option is 3.
Explanation: Properties of Acid:
- They are liquids.
- Acids are the ones which donate hydrogen ions to the solution.
- They turn blue litmus paper to red.
- They are corrosive in nature.
- They are sour in taste. For example: vinegar
From the above properties written, it can be said that option 3 is correct.
Potassium iodide will act as the catalyst to decompose hydrogen peroxide into water and oxygen. A catalyst is a substance that participates in a chemical reaction and influences its speed without undergoing permanent change.<span>
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