Answer:
The answer to your question is: Concentration = 0.05 M
Explanation:
Data
2ml of KI 0.2M
1 ml 1% starch
0.5 ml 0.2 M ammonium persulphate
0.5 ml 0.012 M sodium thiosulphate
2 ml 0.2 M potassium nitrate
2 ml 0.2 M ammonium nitrate
Formula to calculate moles of KI
Molarity = moles / volume
moles = Molarity x volume
moles = (0.2) (0.002)
moles = 0.0004
Total volume = 2 + 1 + 0.5 + 0.5 + 2 + 2 = 8 ml
Molarity = 0.0004 / 0.008
Molarity = 0.05
Volume of O2 : 168 L
<h3>Further explanation</h3>
Given
Reaction
2 KClO3 (s) → 2 KCl (s) + 3 O2 (g)
5 moles of KCIO3
Required
volume of O2
Solution
From the equation, mol O2 :
= 3/2 x moles KClO3
= 3/2 x 5 moles
= 7.5 moles
Assumed at STP( 1 mol = 22.4 L) :
= 7.5 x 22.4 L
= 168 L
A material is a mixture if it is not pure
<u>Francium</u><u> </u><u>is</u><u> </u><u>less</u><u> </u><u>e</u><u>l</u><u>e</u><u>ctronegative</u><u> </u><u>than</u><u> </u><u>barium</u>
Answer:
there gravitational force is very less to pull the weight of a person.