Which type of reaction is always spontaneous? A. an exothermic reaction that has an increase in disorder

B. an exothermic reaction that has a decrease in disorder

C. an endothermic reaction that has an increase in disorder

D. an endothermic reaction that has a decrease in disorder

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

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %