D) 710 g
Step by Step:
Multiply 2.5 L by 2.0 M to solve for moles
2 mol/L • 2.5 L= 5 mol
Find formula weight of sodium sulfate
Na2SO4-142.04 g/mol
Na- 2(22.99)=45.98
S-32.06
O-4(16)=64
Multiply miles by formula weight
5 mole • 142.04 g/mol=710.2 g
The fuel rods contain the pellets of uranium dioxide which releases radioactive energy.
An active skill of information from a primary source
Answer: 10.5 hope this helps!
In this question, what are we really being asked? We are being asked about the number of moles there in 2.0x10^22 molecules of H2O.
We are going to use the formula,
Number of moles = Number of molecules / Avogadro's number
We have the number of molecules: 2.0 x 10^22
Avogadro's number: 6.02 x 10^23
Now we will plug in our information in a scientific calculator:
(2.0 x 10^22) / (6.02 x 10^23) = 0.03 moles is our answer.