A 3.00-L flask is filled with propane (C3 H6) at 1.00 atm and -20.0 oC. What is the mass of the propane in the flask?

Which substances have the lowest melting points: ionic covalent, or metallic

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride