Normal atmospheric pressure at sea level is ?

Ineed extreme for task 2. my student number is 571721. many to whoever solves this correctly, im in debt to you.

The density of a liquid could be found by using

The pressure, volume, and temperature of a mole of an ideal gas are related by the equation pv = 8.31t, where p is measured in kilopascals, v in liters, and t in kelvins. use differentials to find the approximate change in the pressure if the volume increases from 14 l to 14.6 l and the temperature decreases from 375 k to 370 k. (round the answer to two decimal places.)