A substance which

melts/boils at a fixed temperature is a pure substance

The leaves of the rhubarb plant contain high concentrations of diprotic oxalic acid (hooccooh) and must be removed before the stems are used to make rhubarb pie. if pka1 = 1.23 and pka2 = 4.19, what is the ph of a 0.0269 m solution of oxalic acid?

What happens to in the protoplanetary

Which gas effuses faster at the same temperature: molecular oxygen or atomic argon?

P4O10 (s) = - 3110 kJ/mol H2O (l) = - 286 kJ/mol H3PO4 (s) = - 1279 kJ/mol Calculate the change in enthalpy for the following process: P4O10 (s) + 6H2O (l) → 4H3PO4 (s)

What type of wavelength do television signals have A. Short B. Intermediate C. long D. Very Rapid

What is 0.002353 to two significant figures

10. Is the identity of an element determined by its mass number or atomic number? By omak

Nitric acid, hno3, dissociates in water to form nitrate ions and hydronium ions. what change in hybridization of the nitrogen atom occurs in this dissociation

Which is classified as a salt ammonia or sodium chloride?

How many grams of CrSO3 are in 2.4 moles of CrSO3