Which range results in the formation of different substances 1) burning of propane 2) melting of NaCl2 (s) 3) desposition of CO2 (g) 4) solidification of water

Given the equations below, what is the total enthalpy change for the formation of phosphorus pentachloride, PCl5, when phosphorus is burned in excess chlorine?

What is the name for the positive subatomic particles in an atom?

Does it matter what initial concentration of reactants and products are used

A formula that shows how many atoms of each element a substance contains is called a (n) _ O A. ionic formula O B. molecular formula O C. structural formula O D. empirical formula

Round 0.0645 g to 2 significant figures

The periodic table includes all of the known elements in the world. how are elements arranged on the periodic table?

The pOH of a solution is 13.28. What is the [OH]

If you can choose any animal in the world to be, what animal would you choose. (I'd be a wolf or a dog, mostly a wolf)

Determine the molecular geometry about each interior nitrogen atom of n2h4.

When all of the bulbs in the parallel circuit were first lit, did they all illuminate equally?