Question

25 points question
Oxygen is present in a 1-litre flask at a pressure of 7.6×10^-10 mm of Hg at 0℃. Calculate the number of oxygen molecules in the flask.
Plz don't spam.

Answer 1

Heya....✋
Answer is in attachment....

Answer 2

First we should calculate the number of moles of the gas under the given condition by the relation
PV = nRT

Here P = 7.6 * 10^(-10) mm Hg

= 7.6 *10^(-10)/760 atm. = 1 * 10^(-12) atm. = 10^(-12) atm.

V = 1 litre

T = 273 + 0 = 273K

R = 0.082 litre atm./K/mol

Putting the values in equation

n = PV/RT = [10^(-12) * 1]/[0.082 *273] moles

now since 1 mole = 6.022 * 10^(23) molecules

[10^(-12)]/[0.082 *273] moles
= 6.023 *10^23 *10^(-12)/[0.082 *273] molecules

= 2.7 * 10^10 molecules
HOPE IT HELPS
Please mark this answer as a brainlist answer if you like the answer please