Question

Atmospheric pressure yesterday was given as 0.875 atm. Express this pressure in units of torr and also in kilopascals (kPa), respectively.
a) 665 torr and 8.87 × 104 kPa
b) 665 torr and 88.7 kPa
c) 1.32 × 10−3 torr and 9.87 × 10−3 kPa
d) 869 torr and 88.7 kPa

Answer 1

This problem is about conversion and dimensional analysis. Important information to know:
 1 atm = 760 torr = 101.325 kPa

For atm to torr conversion:

0.875 atm * (760 torr / 1 atm) = 665 torr

For atm to kPa conversion:

0.875 atm * (101.325 kPa / atm) = 88.7 kPa

Thus the answer is b) 665 torr and 88.7 kPa