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.
-- The area of the long skinny piece on top is (6 x 33) = 198
-- The length of the dotted line between the top and bottom pieces is (33-21) = 12
-- The area of the bottom piece is (12 x 15) = 180
-- The area of the whole thing is (198 + 180) = 378
-- The perimeter of the whole thing is (33 + 6 + 21 + 15 + 12 + 15 + 6) = 108
Answer:
Step-by-step explanation:
<u>Solving with one operation at each step:</u>
- {362 – [63 + (48 ÷ 2) x 2]} + 3(9 +4) =
- {362 – [63 + 24 x 2]} + 3(9 +4) =
- [362 – (63 + 48)] + 3(9 +4) =
- (362 – 111) + 3(9 +4) =
- 251 + 3(13) =
- 251 + 39 =
- 290
I want to say about 27% but I am not completely sure
