What is the name of portion of an objects motion that combines to give the resultant motion?

On a day when the barometer reads 75.23 cm, a reaction vessel holds 250 ml of ideal gas at 20 celsius. an oil manometer ( ρ= 810 kg/m^3) reads the pressure in the vessel to be 41 cm of oil and below atmospheric pressure. what volume will the gas occupy under s.t.p.?

What is the relationship between wavelength of light and the quantity of energy per photon?

What electron configurations do atoms usually achieve by sharing electrons to form covalent bonds?