A4.86-gram sample of calcium reacted completely with oxygen to form 6.80 grams of calcium oxide. this reaction is represented by the balanced equation below.
2ca(s) + o2(g) ==> 2cao(s)
54 determine the total mass of oxygen that reacted.

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