Which of the following is the correct equation for the reaction below?
Two molecules of magnesium solid react with one molecule of oxygen gas to
form two molecules of magnesium-oxide solid.
O A. Mg(s) + O2(g) → Mgo (s)
O B. 2 Mg (9) + O2(g) → 2 Mgo (9)
O C. 2 Mg (s) + O2 (g) – 2 Mgo (s)
O D. 2Mg2 (s) + 20 (g) – 2MgO2 (s)

Achemist wants to extract copper metal from copper chloride solution. the chemist places 0.50 grams of aluminum foil in a solution containing 0.75 grams of copper (ii) chloride. a single replacement reaction takes place. (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction? a) approximately 0.36 grams, because copper (ii) chloride acts as a limiting reactant b) approximately 1.8 grams, because copper (ii) chloride acts as a limiting reactant c) approximately 0.36 grams, because aluminum acts as a limiting reactant d) approximately 1.8 grams, because aluminum acts as a limiting reactant

The volume of an unknown substance in a sealed glass jar is 50 milliliters. the volume of the jar is 200 milliliters. which state of matter could the substance be?

Which of the following is true about the speed of light? it depends on the wavelength.