What country used the most energy in world during both 1990 and 2003?

What is the PH of a solution whose [H+] is 0.0007

By analogy to examples given in the text, predict what gas forms when na2so3 (s) reacts with hcl (aq). express your answer as a chemical formula.

Why do gases have low density

Sodium and chlorine atoms combine readily because they both tend to lose electrons. True or False?

An aqueous solution in a 55 gallon (208 l drum), characterized by minimal buffering capacity, received 4kg of phenol and 1.5 kg of sodium phenate. What is the ph of the solution. The pka of phenol = 9.98.

A sample of oxygen gas (O2) at STP has a mass of 48.0 grams. What is the volume of the gas?

What is the oxidation number for Our in NaHCO3?

To determine if a reaction is exoteric a student should use

Which of the following are physical properties of a penny? Choose all that are correct. Select one or more:a. Slightly red in color. b. Conducts electricity very well. c. Reacts to oxygen when heated. d. Resists corrosion from most acids.

NO2 and N2O4 undergo the reaction shown. When a sealed container of NO2 reaches chemical equilibrium, which must be true? A) No N2O4 is present. B) No chemical reactions are occurring. C) The rates of the forward and reverse reactions are equal.