An atom's mass number equals the number of protons plus the number of neutrons.
Hope this helps! (:
Answer:
71.19 C
Explanation:
25C = 25 + 273 = 298 K
Applying the ideal gas equation we have

where P, V and T are the pressure, volume and temperature of the gas at 1st and 2nd stage, respectively. We can solve for the temperature and the 2nd stage:

the greater the <u>mass</u> of an object the more force is needed to cause acceleration