Final answer:
The ideal gas law (PV = nRT) can be algebraically rearranged to solve for the number of moles (n) by dividing both sides by RT, resulting in the formula n = PV/RT, which corresponds to option A.
Step-by-step explanation:
The subject of this question is Chemistry, and it is targeted at High School level students. The equation PV = nRT is a fundamental equation known as the ideal gas law, expressing the relationship between pressure (P), volume (V), amount in moles (n), temperature in Kelvin (T), and the ideal gas constant (R).
To solve for n, the number of moles, you would rearrange the equation algebraically by dividing both sides of the equation by RT. This gives you the formula n = PV/RT, which is represented by answer choice A. This equation is crucial for solving problems involving the properties of gases when the necessary values are known.
When using the ideal gas law, it's important to ensure that the temperature is in Kelvin. If it's given in degrees Celsius, you'll need to convert it to Kelvin by adding 273.15. Once the units are consistent and correct, you can proceed to solve for the desired variable.