What is the atomic number of an atom with 20 protons 18 electrons and 22 neutrons

20

Explanation:

The atomic number is just the number of protons in an atom. So if the atom has 20 protons, the atomic number is also 20.

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm

am i too late?

explanation: