Standard pressure is 101.3 KPa, which is equal to 760. o mmHg. If gas has a pressure of 545 mmHg, what is its pressure in KPa to the proper number of significant figures?

72.6 kPa

Explanation:

We can use ratios to answer this question

760 mmHg : 101.3 kPa

545 mmHg : x

then we cross multiply keeping note of the unit

760x mmHg = 55 208.5 mmHg. kPa

x = 72.6 kPa

*It is worth noting that the k that represents kilo in kPa must be a small letter all the time