What is the empirical formula if you have 81.82 percent carbon and 18.18 percent hydrogen?

Calcium chloride +gold(1) oxide—>

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?

What is the formula for the compound dinitrogen pentoxide? a. n4o5 b. n5o4 c. n4o6 d. n5o2 e. n2o5