Answer:
sodium chloride
white
because the constituent cations and anions do not absorb in the visible part of the spectrum.
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>
The level is 1.59 of natural forest
Answer: It releases energy that is called the fusion
Explanation: The reaction, which it is known as a nuclear fusion that converts hydrogen atoms into helium.
Answer:
The answer to your question is 0.036 M
Explanation:
Data
Molarity = ?
mass = 4.0 grams KOH
Volume = 2 L
Molecular mass KOH = 39 + 16 + 1 = 56 g
Formula
Process
1.- Calculate the moles of KOH using proportions
56 g of KOH ---------------- 1 mol
4 g of KOH ---------------- x
x = (4 x 1) / 56
x = 0.071 moles
2.- Substitute the values in the formula to find Molarity
3.- Simplification and result
Molarity = 0.036 M