Answer is 5 tho idk why the options so weird. anyways u have to use the periodic table, check for the element which has 8 protons. this will be oxygen.
to calculate electrons, take 16-8 hence u will have 8 electrons.
qn said u have net charge of 3+. this means that u have to minus 3 from the electrons
so 8-3 = 5
Answer:
0.13 atm
Explanation:
Using the Ideal Gas Law; PV=nRT, we can rearrange to solve for pressure.
P=nRT/V
P is pressure, n is number of moles (0.023), R is a constant (0.08206 L*atm/mol*K), T is temperature in Kelvin (293.15K) and V is volume, 4.2 L.
So, plugging in;
P=(0.023mol)(0.08206L*atm/mol*K)(293.15K)/(4.2 L)
P=0.1317 atm
P=0.13 atm; multiply by 760 to get to Torr or mmHg.
