Let's imagine that we were going to start a company that produces
spectroscopes to sell to general chemistry students. To ensure that all the
spectroscopes created the same calibration line and equation we need to be sure it was always the same we should compare all these with the same standard spectroscope while manufacturing
hope this helps
Answer:
pH=4.05
Explanation:
C7H6O2 -> C7H6O- + H+
ka= [C7H6O-] [H+]/[C7H6O2]
During equilibrium
[C7H6O-]= [H+]= x^2
[C7H6O2]=0.12-x
Replace
ka= x^2/0.12-x
6.5 x10^-5= x^2/0.12-x
7.8x10^-6 - 6.5 x10^-5x=x^2
x^2+ 6.5 x10^-5x - 7.8x10^-6
Solution of quadratic equation
x=8.8 x10^-5
pH= -log [H+]= -log 8.8 x10^-5=4.05
<span> because the </span>water<span> molecules at the surface are </span>cohesive<span> and create a condition called surface tension.
HOPE IT HELPS:)</span>
Answer:
'An ion has a non-zero electric charge. A radical has an atom with unfilled electron shells and so is very reactive, but is electrically neutral.'
'Atoms are single neutral particles. Molecules are neutral particles made of two or more atoms bonded together.'
'The primary difference that lies between these organic compounds and inorganic compounds is that organic compounds always have a carbon atom while most of the inorganic compounds do not contain the carbon atom in them.'
Answer: More than one atom of the same type chemically joined together
Explanation:
An atom is the smallest unit of any matter which may or may not have independent existence. Example: Argon (Ar) is an element which exist as Ar atom only.
Molecule is the smallest unit of any matter which always have independent existence. For example: Hydrogen (H) is an element which can exist in nature as molecule only.
Atoms of different elements chemically joined together is called as a compound. Example: is a compound formed by chemical combination of hydrogen (H) and oxygen (O) atom.