What is the % by mass of each element in a sample of Calcium Carbonate?​

Match the following items. 1. high-intensity bundle of energy being emitted from some decaying nuclei gamma ray 2. particle radiating from the nucleus of some atoms beta particle 3. negative particle identical to an electron but radiating from a decaying nucleus alpha particle

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5