Answer: Oxidation reaction occurs when a reactant losses electrons in the reaction.
Reduction reaction occurs when a reactant gains electrons in the reaction.
Explanation: Reduction reaction : It is defined as the reaction in which a substance gains electrons. That means, the gain of electrons takes place.
Or we can say that, reduction reaction occurs when a reactant gains electrons in the reaction.
Redox reaction or Oxidation-reduction reaction : It is defined as the reaction in which the oxidation and reduction reaction takes place simultaneously.
False, because water vapor, water vapour or aqueous vapor, is the gaseous phase of water. It is one state of water within the hydrosphere. Water vapor can be produced from the evaporation or boiling of liquid water or from the sublimation of ice. Unlike other forms of water, water vapor is invisible.
Answer:

Explanation:
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In this case, the molarity is defined as the ratio of the moles of the solute to the volume of the solution in liters:

In this case, the solute is the KCl (potassium chloride) and the solution is made up of both water and KCl. Moreover, since during this type of dissolution processes, the volume of the solution is not significantly affected by the addition of the solute, the resulting molarity is:

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Answer:
The molar mass of the diprotic acid is 90.10 g/mol.
Explanation:
The acid is 25.0 mL of this solution required 11.1 mL of 1.00 KOH for neutralization.

To calculate the concentration of acid, we use the equation given by neutralization reaction:
( neutralization )
where,
are the n-factor, molarity and volume of diprotic acid
are the n-factor, molarity and volume of base which is KOH.
We are given:
Putting values in above equation, we get:


Molarity of acid solution = 0.222 M =0.222 mol/L
Volume of original solution = 250 mL = 0.250 L ( 1 mL = 0.001 L)
Moles of diprotic acid in 0.250 L solution :

Mass of diprotic acid = m = 5.00 g


The molar mass of the diprotic acid is 90.10 g/mol.
Use “graphite” hope this helps