For a given chemical reaction, the addition of a catalyst provides a different reaction pathway that a) decreases the reaction rate and has a higher activation energy b) decreases the reaction rate and has a lower activation energy c) increases the reaction rate and has a higher activation energy d) increases the reaction rate and has a lower activation energy

Can someone me with questions 12 and 13 plz.

Select the correct answer from each drop-down menu.describe what happens to a carbon-11 atom when it undergoes positron emission.the decay of a carbon-11 atom _1_, and this causes it to emit _2_.options for 1: > changes a neutron into a proton> changes a proton into a neutron> is hit with a neutron> reconfigures its protons and neutronsoptions for 2: > a negatively charged electron-sized particle> a positively charged election-sized particle> two atoms and several neutrons> two neutrons and two protons

What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons? a) 6 b) 8 c) + 1 d) 12 e) 18