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=B
36 red marbles
64 blue marbles
red marbles:blue marbles
36:64
now lets simplify the ratio by dividing both numbers by 2
18:32
continue simplifying by dividing both sides by 2 again...
9:16
The ratio of red to blue marbles is 9:16
Answer:
I think true I'm so sorry if IT'S wrong