45.6 mL of 0.0600 M of
is added to 25.0 mL of HCl of unknown concentration then , the concentration of HCl is 0.032 M .
Calculation ,
Formula used :
=
...( 1 )
Where
= concentration of
= 0.0600 M ( given )
= concentration of HCl = ? ( to be find )
= volume of
= 25.0 mL ( given )
= volume of HCl = 45.6 mL ( given )
Now , put the value of all volume and concentration in equation ( 1 ) we get .
0.0600 M × 25.0 mL =
× 45.6 mL
= 0.0600 M × 25.0 mL / 45.6 mL = 0.032 M
Therefore , concentration of unknown concentration of HCl is 0.032 M .
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CO2 is classified as a compound
m = mass of the particle = 2 x 10⁻³⁰ kg
Δv = uncertainty in velocity of the particle = 10² m/s
Δx = uncertainty in position of the particle = ?
h = plank's constant = 6.63 x 10⁻³⁴ J-s
uncertainty principle is given as
m Δx Δv ≥ h/(4π)
inserting the values
(2 x 10⁻³⁰) Δx (10²) ≥ (6.63 x 10⁻³⁴)/(4(3.14))
Δx ≥ 2.64 x 10⁻⁷ m
so minimum possible uncertainty is 2.64 x 10⁻⁷ m
Evaporation because the salt would dissolve in the water then boil the water and it will evaporate leaving the salt left in the bowl