Give one reason why the antibody level drops after reaching the immunity level

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 ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0

What is the percent by mass of magnesium sulfate in mgso4.7h2o