If 24.4 grams of magnesium react with oxygen gas to produce 40.5 grams of magnesium oxide, what is the mass in grams of
the oxygen gas in the chemical change?
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In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

Three alkali metals in group 1 are a. calcium, strontium, barium b. boron, aluminum, gallium c. sodium, potassium, rubidium d. fluorine, iodine, chlorine

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