Justifica con ecuaciones ionicas la formacion de los siguientes iones: a) ion hidronio
b) ion hidroxido
c) ion peroxido
d) ion seleniuro
e) ion ortofosfico

there are two significant figures.

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.

c. 4.54 x 10–12 j happens to be correct