Why does the presence of lone pairs contribute to the polarity of a water molecule?

In a reaction (at equilibrium) that makes more moles of gas than it consumes, what is the effect of increasing the pressure?

The nuclear fission process releases neutrons and question 27 options: alpha particles electrons energy beta particles

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.