Answer: hydrochloric acid
Explanation:
As can be seen from the chemical equation, 2 moles of hydrochloric acid react with 1 mole of calcium.
According to mole concept, 1 mole of every substance weighs equal to its molar mass.
Thus of of hydrochloric acid reacts with 40 g of calcium.
100 g of hydrochloric acid react with=of calcium
Thus HCl is the limiting reagent as it limits the formation of product and calcium is the excess reagent as (100-54.79)=45.21 g is left unreacted.
Answer:
1.13moles
Explanation:
Given parameters:
Number of atoms = 6.777 x 10²³ atoms
Unknown:
Number of moles = ?
Solution:
A mole of a substance contains the avogadro's number of particles
6.02 x 10²³ particles = 1 mole
6.777 x 10²³ atoms will contain = 1.13moles
Answer:
1. was the
value calculated by the student.
2. was the
of ethylamine value calculated by the student.
Explanation:
1.
The value of Aspirin solution = 2.62
Moles of s asprin =
Volume of the solution = 0.600 L
The initial concentration of Aspirin = c =
initially
c 0 0
At equilibrium
(c-x) x x
The expression of dissociation constant :
:
was the
value calculated by the student.
2.
The value of ethylamine = 11.87
The initial concentration of ethylamine = c = 0.100 M
initially
c 0 0
At equilibrium
(c-x) x x
The expression of dissociation constant :
:
was the
of ethylamine value calculated by the student.