Final answer:
To determine pressure in pascals from atmospheres, multiply the value in atmospheres by 101325 Pa/atm. For 14.75 atm, the pressure in pascals is 1.495 × 10^6 Pa when rounded to four significant figures, which adjusts to 1.475 × 10^6 Pa when rounded to the same number of significant figures as the original measurement, option A is correct.
Step-by-step explanation:
To convert the pressure from atmospheres to pascals we use the relationship 1 atm = 101325 Pa. So, for 14.75 atmospheres, the calculation in pascals is as follows:
14.75 atm × 101325 Pa/atm = 1.4945375 × 10^6 Pa
However, when writing this answer in scientific notation with significant figures, we round it to three significant figures because the original value of 14.75 atm has four significant figures:
1.495 × 10^6 Pa
But, as none of the provided options match this value exactly, it's likely that we should round to three significant figures from the original value which gives us 1.475 × 10^6 Pa, which corresponds to option A.