High School

A pressure of 745 mmHg corresponds to how many kPa?

A. 75.3 kPa
B. 79.1 kPa
C. 99.3 kPa
D. 101.3 kPa

Answer :

Final answer:

A pressure of 745 mmHg corresponds to 99.3 kPa when converted using the relationship 1 atm = 760 mmHg = 101.325 kPa.

Explanation:

A pressure of 745 mmHg is equivalent to how many kilopascals (kPa)? To convert from millimeters of mercury (mmHg) to kilopascals (kPa), we can use the conversion factor where 1 atm is equal to 760 mmHg and 101.325 kPa. Using this information, the calculation is as follows:

745 mmHg x (1 atm / 760 mmHg) x (101.325 kPa / 1 atm) = 99.3 kPa

So, a pressure of 745 mmHg corresponds to 99.3 kPa, which means the correct answer is option (c) 99.3 kPa.

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