Question

Inches of mercury (inHg) is commonly used as unit of atmospheric pressure. It indicates the height of Hg (in inch) that atmospheric pressure can support. If atmospheric pressure is 27.6 inHg, what is it in atm? Use decimals (not scientific notation) and 3 sig figs when entering your answer. Given: 1 in = 2.54 cm = 25.4 mm; 1 atm = 760 mmHg.

Answer 1

Answer:

The answer to your question is 0.92 atm

Explanation:

Data

Atmospheric pressure = 27.6 inHg

Atmospheric pressure = ? atm

Process

1.- Convert inHg to cmHg

                      1 in Hg ------------------- 2.54 cm

                    27.6 inHg ----------------- x

                     x = (27.6x 2.54) / 1

                     x = 70.1 cm

2.- Convert cmHg to mmHg

                     2.54 cm ----------------- 25.4 mmHg

                      70.1 cm ----------------  x

                      x = (70.1 x 25.4)/2.54

                      x = 701 mmHg

3.- Convert mmHg to atm

                      760 mmHg ------------- 1 atm

                      701 mmHg  -------------  x

                       x = (701 x 1)/760

                       x = 0.922 atm