A sample of gas occupies 50.0 L at 15.0 °C and 640.0 mm Hg
pressure. What is the volume at STP?

passing a magnet thought the

mixture , because iron gets attracted to magnet .

there is none because earth is stationary and flat.

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)

hypostyle hall;