Question

tell me about stoichiometry and stoichimetric calculation.

Answer 1

@UnkleRhaukus

Answer 2

ok

Answer 3

@ashna

Answer 4

Say we have a formula for a compound
di hydrogen monoxide
\[H_2O\]

the two is because for ever molecule there are two Hydrogen atoms and one Oxygen atom

Answer 5

to make hydrogen monoxide we can burn Hydrogen gas in Oxygen
both Hydrogen and oxygen are diatomic (two atoms in per molecule)
\[H_2+O_2\rightarrow H_2O\]

Answer 6

however we notice the equation is not balanced,

Answer 7

balancing the reactants and products 's
number of atoms per reaction
we find

\[2{H_2}_{(\text g)}+{O_2}_{(\text g)}\rightarrow 2{H_2O}_{(\text g)}\]

that twice the number of molecules of Hydrogen as Oxygen are needed

Answer 8

gasses of the same T,P,V, will have the same number of atoms per unit volume ,

a standard mole of gas will always occupy around 24L at STP

Answer 9

the stoichiometric numbers are these ones
\[\color{red}2{H_2}_{(\text g)}+\color{red}1{O_2}_{(\text g)}\rightarrow \color{red}2{H_2O}_{(\text g)}\],
they express not only the ratio of the reactants and products in molecules per reaction
but this is also the same ratio of moles of each species in the reaction,