Explanation:
[H+]=10^-pH
[H+]=10^-9.2
[H+]=6.031x10^-10
[OH-]=1x10^-14÷[H+]
[OH-]=1x10^-14÷[6.031x10^-10]
[OH-]= 1.66x10^-5
im pretty sure this is right
Answer:
a. 6.57 cm
b. 8.17 cm
c. 0.80
Explanation:
a. The compound moved from where it was first placed, to a spot 7.57 cm from the bottom of the paper, in other words:
- 7.57 cm - 1.00 cm = 6.57 cm
b. A similar method is made for the solvent:
- 9.17 cm - 1.00 cm = 8.17 cm
c. The Rf of the factor is equal to the <u>distance that the compound moved divided by the distance the solvent moved</u>:
Scientific evidence does not always agree because not all scientific evidence is the same.
<h3><u>Ⲁⲛ⳽ⲱⲉⲅ</u><u>:</u></h3>
<h3><u>Ⲋⲟⳑⳙⲧⳕⲟⲛ :</u></h3>
Molarity is used to measure the concentration of a solution , so it is also as molar concentration. It is denoted as M or Mol/L
<u>We </u><u>are </u><u>given </u><u>that </u><u>:</u>
- Weight of = 5.34g
- Volume of solution = 214 ml , or 0.214 L
The molar mass of magnesium chloride ( ) is 95.21 g / mol
We can calculate the molarity of the solution by dividing the number of moles of solute by volume of solvent in liter ,i.e:
ㅤㅤㅤ⸻( 1 )
<em>Where,</em><em> </em>
- M = molarity
- n = number of moles
- V = Volume
We can calculate the number of moles by dividing the actual mass by its molar mass ,i.e:
ㅤㅤㅤ⸻ ( 2 )
<em>W</em><em>here,</em>
- n = number of moles
- m = molar mass
- w = actual mass
<u>Therefore</u><u>,</u>
<u>P</u><u>utting </u><u>the </u><u>values </u><u>in </u><u>equation </u><u>(</u><u> </u><u>1</u><u> </u><u>)</u><u>:</u>