Catalyst are that increase the rate of a chemical reaction.

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons