Answer:
C.because protons and electrons are equal they will be 38 so neutron will be 50
2Al + 3CuCl2 ➡ 2AlCl3 + 3Cu.
Moles of Al = 1.2/27 = 0.045 moles
2 moles of Al reacts with 3 moles of CuCl2.
Therefore, 1 mole of CuCl2 reacts with =2/3 x moles of Al
= 2/3 x 0.045
= 0.03 moles.
40% because of ionic charges.
Answer:

Explanation:
According to the ideal gas law equation:

Let's express the number of moles in terms of mass and molar mass:

Let's divide both sides by volume:

Notice that:

So the equation becomes:

Expressing density:

Substituting the given values:
