Answer:
calculate the number of atom in 3 mol helium
Probly the first one it looks right
Answer:
803.84
Step-by-step explanation:
the formula for the area of a circle is A = π r2 which is pi times the radius squared.n in this case if the circumference is 8 cm then the radius would be half of the circumference which is 4. then you square 4 which is equal to 256. Then take 256 and multiply it by pi. 256 × 3.14 = 803.84. i hope this helped you.
750 yards in 25 minutes
Divide both numbers by 25
<span>30 yards in 1 minute</span>
