Answer:
10.5g
Explanation:
First, let us calculate the number of mole of NaHCO3 present in the solution. This is illustrated below:
Volume = 250mL = 250/1000 = 0.25L
Molarity = 0.5M
Mole =?
Molarity = mole /Volume
Mole = Molarity x Volume
Mole = 0.5 x 0.25
Mole = 0.125 mole
Now, we shall be converting 0.125 mole of NaHCO3 to grams to obtain the desired result. This can be achieved by doing the following:
Molar Mass of NaHCO3 = 23 + 1 + 12 +(16x3) = 23 + 1 +12 +48 = 84g/mol
Number of mole of NaHCO3 = 0.125 mole
Mass of NaHCO3 =?
Mass = number of mole x molar Mass
Mass of NaHCO3 = 0.125 x 84
Mass of NaHCO3 = 10.5g
Therefore, 10.5g of NaHCO3 is needed.
Answer:
D. AgCl and KNO₃
Explanation:
anions switch from the original reaction.
3 AgN03 + 1 Al ---> 3 Ag + 1 Al(NO3)3
Answer:
Sublimation
Explanation:
Deposition is the process in which a gas transforms into a solid without passing through the liquid phase.
In the opposite process, a solid transforms into a gas without passing through the liquid phase. This process is called sublimation.
Addition of pure water does not change pH of a solution because pure water has neutral pH.
<h3>Why the pH does not change when pure water is added?</h3>
Even though you continue to add pure water into a substance, the acidity or alkalinity of substance still remains the same to that of substance because pure water has neutral pH which can't change the acidity or alkalinity of a solution.
So we can conclude that addition of pure water does not change pH of a solution because pure water has neutral pH.
Learn more about acid here: brainly.com/question/25148363
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