Answer:
4.1 * 10^-22 J
The wave belongs to the infra red portion of the electromagnetic spectrum.
Explanation:
From the formula;
E = hc/λ
We know that;
h= plank's constant = 6.6 * 10^-34 Js
c= speed of light = 3 * 10^8 m/s
λ = wavelength of the wave = 4.80 x 10^5 nm or 4.80 x 10^-4 m
Hence;
E= 6.6 * 10^-34 * 3 * 10^8/ 4.80 x 10^-4
E= 4.1 * 10^-22 J
The wave belongs to the infra red portion of the electromagnetic spectrum.
Mghcl14 + H2 = mghclh 16 work needed to solve this problem
Answer:
through Decantation
Explanation:
Decantation: Decantation is pouring out of upper clear layer of liquid into another container to separate two immiscible liquids or to separate different substances in a suspension mixture.
Therefore, we could use decantation once the sand particles settle down by gently pouring the water into another container. Once the water is transfered, we'll be left with sand in the bottom of the first container.
Hope that helps...
Answer:
0.065M
Explanation:
The reaction expression is given as:
HCl + KOH → KCl + H₂O
Given parameters:
Volume of KOH = 25.81mL = 0.02581L
Molarity of KOH = 0.125M
Volume of HCl = 50mL = 0.05L
Unknown:
Molarity of the acid = ?
Solution:
To find the molarity of the acid, HCl, let us use the mole concept.
First, find the number of moles of the base, KOH;
Number of moles of KOH = molarity of KOH x volume of KOH
Number of moles of KOH = 0.125 x 0.0258 = 0.003225mol
From the balanced reaction equation:
1 mole of KOH reacted with 1 mole of HCl
0.003225mol of KOH will react with 0.003255mole of HCl
Molarity of HCl = 
Molarity of HCl = 
= 0.065M
