Answer:
it is D
Step-by-step explanation:
Answer:
x is 30 because 4*30 is 120 and minus 2 is 118
8.2 grams = 1 mol
Na ________
22.99 grams
First multiply the value of 8.2 to 1. Then divide by the value of 22.99 to determine the number of moles of sodium present in the 8.2 gram sample.
Then use the following equation to solve for sodium atoms.
Number of moles of Na • Avogadro Number = Number of sodium atoms.
0.3566782 • (6.02 X 10^23). = 2.1472 X 10 ^ 23. Or 2.15 X 10 ^ 23.
The answer is the second option - 2.15 X 10 ^ 23.
Answer:
c=1/100
Step-by-step explanation:
100cm=m
Step 2: Divide both sides by 100m.
100cm/100m=m/100m
c=1/100
