Which of the following is true about subatomic particles?

the mass of a neutron is the same as the mass of an electron.

neutrons have a negative charge and are the heaviest subatomic particle.

protons are positively charged and are one of the heaviest subatomic particles.

electrons are neutral and are the lightest subatomic particle.

Protons are positively charged and are one of the heaviest subatomic particles

Explanation:

A typical atom consists of three subatomic particles: protons, neutrons, and electrons.

Using Method of elimination;

Option 1 - This is incorrect because the mass of a neutron is slightly greater than the mass of a proton. Electrons are extremely small. The mass of an electron is only about 1/2000 the mass of a proton or neutron

Option 2 - This is incorrect because Neutrons are neutral with no net charge however the mass of a neutron is slightly greater than the mass of a proton.

Option 3 - This is correct because protns are indeed positively charged as the name implies and are one of the heaviest sub atomic particles.

Option 4 - This is incorrect because electrons are negatively charged. However they are indeed the lightest sub atomic particle.

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