How many moles of H2SO4 are present in 0.500 L of a 0.150 M H2SO4 solution?

Describe the chemical reaction based on the chemical equation below. also, explain whether the equation is balanced.

Which metal exist in liquid state and can be cut with knife ?

The size (radius) of an oxygen molecule is about 2.0 ×10−10m. make a rough estimate of the pressure at which the finite volume of the molecules should cause noticeable deviations from ideal-gas behavior at ordinary temperatures (t= 300k ). assume that deviatons would be noticeable when volume of the gas per molecule equals the volume of the molecule itself.