The chemical formula of oxygen is o2 that means it is a single compound or molecule gas? it is pure substance or mixture?

Which statement describes evidence of a chemical reaction? a) ice melting eliminate b) water boiling c) lighting a match d) grape juice freezing

In order to calculate the amount of heat transferred you must know the __ and specific heat of the material, as well as the change in temperature. a. volume b. density c. mass d. enthalpy

Which sample at stp has the same number of atoms as 18 liters of ne at stp