4. The compound iron sulfide can be formed by filtering b. evaporating heating
a. filtering
C. heating
d. mixing

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

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

How many moles of oxygen react with 12 moles of aluminum