Electron geometry of the central atom br in brf4+

Octahedral

Explanation:

Recall that according to Valence Shell Electron Pair Repulsion Theory(VSEPR) the shape of a molecule is based on the number of electron pairs on the outermost shell of its central atom.

In BrF4^-, the bromine atom is surrounded by 6 electron pairs. Four bond pairs and two lone pairs.  This means a total of six regions of electron density.

According to VSEPR Theory,  BrF4^- has an octahedral electron geometry and its the molecular geometry will be square planar  since it is of the type AX4E2.

An image of the  BrF4^- is attached below.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.