The speed of the molecule increses
1- because the lid was closed
The answer to your question is -1
Answer:
It is a strong acid.
Explanation:
A strong acid is any acid that is completely ionized in solutions to release the greatest number of hydronium ions or protons when placed in a solution.
So, when 99.9% of a substance dissociates to release hydronium ions. It is considered as a strong acid.
Answer: 3.48 kJ of heat is released when 155.0 mL of 0.400 M HCl is mixed with 157.0 mL of 0.500 M NaOH
Explanation:
To calculate the number of moles for given molarity, we use the equation:
.....(1)
Molarity of solution = 0.400 M
Volume of solution = 155.5 mL
Putting values in equation 1, we get:
a)
b)
According to stoichiometry;
1 mole of reacts with 1 mole of
Thus 0.0622 moles of reacts with= moles of
Thus HCl is the limitibg reagent and NaOH is in excess
1 mole of HCl gives = 56 kJ
Thus 0.0622 moles of HCl gives =
Thus 3.48 kJ of heat is released when 155.0 mL of 0.400 M HCl is mixed with 157.0 mL of 0.500 M NaOH