To solve this we use the dilution equation used in chemistry,
M1 V1 = M2 V2
where M1 is the concentration of the stock solution, V1 is the
volume of the stock solution, M2 is the concentration of the new solution and
V2 is its volume.
M1 V1 = M2 V2
1.25 M x V1 = 0.500 M x 180 mL
<span>V1 =72 mL of the concentrated solution</span>
<span>Therefore, the correct answer would be option C.</span>
Answer:
I believe it is B. molar mass...
Explanation:
Hope this is right!
Answer:
Decrease by the distance squared
Explanation:
<u><em>Gravitation formula:</em></u>
where
'F' is the force of attraction between the two bodies (Gravitational force),
'G' is the universal gravitational constant,
'M' is the mass of the first object,
'm' is the mass of the second object and
'r' is the distance between the centers of each object.
Hence, with the increase by distance between two objects , the gravitation decreases by the distance squared
Reaction is NH4OH <-> NH4+ OH- (note this is reversible)
Draw up an ICE table
Let x be equilibrium conc of OH- assume init conc of OH is 0M and init conc of NH4+ is 0M also. Init conc of NH4OH is 0.1M so equilibrium conc will be 0.1-x.
%dissociation = x/0.1-x * 100%
1 = 100x/0.1-x
0.1-x = 100x
101x = 0.1
x = 0.0009901
pOH = -log(0.0009901) = 3.00
Answer:
There are 8 valence electrons
Explanation:
