Answer:
235 g
Explanation:
From the question;
- Volume is 400.0 mL
- Molarity of a solution is 4.25 M
We need to determine the mass of the solute K₂CO₃,
we know that;
Molarity = Number of moles ÷ Volume
Therefore;
First we determine the number of moles of the solute;
Moles = Molarity × volume
Moles of K₂CO₃ = 4.25 M × 0.4 L
= 1.7 moles
Secondly, we determine the mass of K₂CO₃,
We know that;
Mass = Moles × Molar mass
Molar mass of K₂CO₃, is 138.205 g/mol
Therefore;
Mass = 1.7 moles × 138.205 g/mol
= 234.9485 g
= 235 g
Thus, the mass of K₂CO₃ needed is 235 g
I can’t read ? This what does it say
With a radius of 3,760 miles (6,052 kilometers), Venus is roughly the same size as Earth — just slightly smaller.
Answer: Option (A) is the correct answer.
Explanation:
When the questions are technical and may require some research from the interviewee then an interviewer want to provide the interviewee a list of questions before the interview.
As only in this case, interviewer wants the interviewee to take some time in order to think about the particular question and then answer it appropriately.
As if there is no list of questions then there are changes that interviewee will forget about some useful point which is important to keep in mind before answering.
