Blast furnaces give off many unpleasant and unhealthy gases. If the total air
pressure is 0.99 atm, the partial pressure of carbon dioxide is 0.05
atm, and the partial pressure of hydrogen sulfide is 0.02 atm, what is
the partial pressure of the remaining air?

The partial pressure of the remaining air is 0,92 atm.

Explanation:

We apply Dalton's law: the total pressure of a gaseous mixture (in this case air) is equal to the sum of the partial pressures of the gases that make up that mixture:

P total = P C02 + P H2S + P remaining air

P remaining air= P total - P C02 - P H2S= 0,99 atm -0,05 atm -0,02 atm=

P remaining air= 0,92 atm

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."