High School

What is the equivalent pressure of 400 torr in kPa?

A. 3000 kPa
B. 53.3 kPa
C. 101.3 kPa
D. 40.5 kPa

Answer :

To convert the pressure from torr to kPa, we can use the conversion factor between these two units.

1. Know the Conversion Factor:
- 1 atm is equivalent to 760 torr.
- 1 atm is also equivalent to 101.325 kPa.
- Therefore, to convert from torr to kPa, use the conversion factor: [tex]\( \frac{101.325 \, \text{kPa}}{760 \, \text{torr}} \)[/tex].

2. Calculate the Equivalent Pressure in kPa:
- You have a pressure of 400 torr.
- Use the conversion factor to convert to kPa:
[tex]\[
400 \, \text{torr} \times \frac{101.325 \, \text{kPa}}{760 \, \text{torr}} = 53.3 \, \text{kPa}
\][/tex]

3. Conclusion:
- The equivalent pressure of 400 torr is approximately 53.3 kPa.

Therefore, the correct answer is 53.3 kPa.