It’s Benzene, I do believe :) hope this helped, good luck!
I guess it about 142 atoms
Answer:
Krypton.
Explanation:
By Graham's Law:
Rate 1 / Rate 2 = sqrt M2 / sqrt M1
Molecular Mass for Neon is 20.18
so we have:
38 / 77.5 = sqrt 20.18 / sqrt x where x is the unkown gas.
sqrt x = 9.162
x = 83.94.
This gas is Krypton.
Explanation:
- The rule apply for the multiplication and division is :
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
- The rule apply for the addition and subtraction is :
The least precise number present after the decimal point determines the number of significant figures in the answer.
a) 12.3 mm × 15.853 mm :
Three significant figures.
b) 72.98 · 15.830 ml
Three significant figures.
c) 12.3 mm + 15.853 mm
Three significant figures.
d) 172.3 cm - 15.853 cm
Four significant figures.