A flexible container at an initial volume of 5.120 L contains 8.500 mol of gas.
More gas is then added to the container until it reaches a final volume of 18.10
L. Assuming the pressure and temperature of the gas remain constant,
calculate the total number of moles of gas in the container.

30.05 mol

Explanation:

solving the proportion

V1 / n1 = V2 / n2

5.120 L            18.10 L

––––––––=––––––

8.500 mol         x

x = 30.05 mol

what are the two models

explanation:

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.