Calculate the mass of o2 produced if 3.450g potassium chlorate is completely decomposed by heating in presence of a catalyst (manganese dioxide)

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

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

Why is the bottom layer of a trophic pyrimid the