What is the standard enthalpy of formation of nh3 gas, standard heat of atomisation of nh3(g), h2(g) and n2(g) are 1167 kj/mol and 942 kj/mol respectively?

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.

The biosphere of the earth is made up of what compound? organic or inorganic?

Mercury metal is poured into a graduated cylinder that holds exactly 22.5 ml the mercury used to fill the cylinder mass in 306.0 g from this information calculate the density of mercury