Deuterium:also known as heavy hydrogen) is one of two stable isotopes of hydrogen (the other being protium or hydrogen-1). The nucleus of a deuterium atom,called a deuterium,contains one proton and one neutron,whereas the far more common protium has no neutron in the nucleus.
That will be regarding the water cycle. Write about the importance of the water cycle, each state from evaporation, condensation, precipitation, and run off. How the water cycle affects weather, animals, and the environment.
Answer:
Explanation:
We have to remember the <u>molarity equation</u>:
So, we have to calculate "mol" and "L". The total volume is 100 mL. So, we can do the <u>conversion</u>:
Now we can calculate the moles. For this we have to calculate the <u>molar mass</u>:
O: 16 g/mol
H: 1 g/mol
C: 12 g/mol
With the molar mass value we can <u>calculate the number of moles</u>:
Finally, we can <u>calculate the molarity</u>:
I hope it helps!
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
