Question

At what temperature Celsius will 19.4 g of molecular oxygen, O2, exert a pressure of 1820 mm Hg in a 5.12 L

cylinder?

Answer 1

Answer:−27∘C, 19.4 g of molecular oxygen exerts a pressure of 1820 mmHg in a 5.12 L cylinder.

Explanation:The molar mass of O2

is 32.00 g/mol. So, the number of mol (n) of O2 present in 19.4 g of mass is calculated as shown below:

n =19.4g

32.00g/mol

=0.60625mol