Which of the following elements can form a covalent (molecular) bond with nitrogen? A. Oxygen
B. Magnesium
C. Sodium
D. Neon

Which sentence best describes the formation of igneous rock? a- lava on the surface dries up and makes arock b_melted rocks cools and forms crystals c_rocks under tremendous heat and pressure d_magma is melted rock underground

What are the spectator ions in 2h+ + so42- + ca2+ + 2r → caso4 + 2h+ + 21?

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.