Among other also important contributions, I can mention tha he:
- Discovered the role of Oxygen in comustion and respiration
- Discovered that water is a compound of hydrogen and oxygen
- Invalidated the theory of phlogiston
- Discovered some elements
- Was a main contributor to develop chemistry as a quantitative science
- Made an extensive list of elements
Answer:
14.3mL you require to reach the half-equivalence point
Explanation:
A strong acid as HClO₄ reacts with a weak base as CH₃CH₂NH₂, thus:
CH₃CH₂NH₂ + HClO₄ → CH₃CH₂NH₃⁺ + ClO₄⁻
As the reaction is 1:1, to reach the equivalence point you require to add the moles of HClO₄ equal to moles CH₃CH₂NH₂ you add originally. Also, half-equivalence point requires to add half-moles of CH₃CH₂NH₂ you add originally.
Initial moles of CH₃CH₂NH₂ are:
20.8mL = 0.0208L × (0.51mol CH₃CH₂NH₂ / 1L) =
0.0106moles CH₃CH₂NH₂
To reach the half-equivalence point you require:
0.0106moles ÷ 2 = 0.005304 moles HClO₄
As concentration of HClO₄ is 0.37M, volume you require to add 0.005304moles is:
0.005304 moles HClO₄ ₓ (1L / 0.37mol) = 0.0143L =
<h3> 14.3mL you require to reach the half-equivalence point</h3>
Answer:
The answer is
<h2>241.15 kPa</h2>
Explanation:
To find the pressure in kilopascals we must first find the pressure in Pascal
To find the pressure in Pascal we use the conversion
1 atm = 101 , 325 Pa
If 1 atm = 101325 Pa
then 2.38 atm = 2.38 × 101325
= 241153.5 Pa
Converting it into kPa we have the final answer as
<h3>241.15 kPa</h3>
Hope this helps you
Let's see the balanced equation
Hence
As moles are equal given
- Ca should be the limiting reagent
- 2mol Ca produces 2 mol CaO
- 3mol Ca produces 3mol CaO