Acid rain occurs when sulfur dioxide reacts with oxygen and water in the air to form sulfuric acid. Write a blanced chemical equation describing this reaction. Calculate the mass of sulfuric acid produced when 4.50g of sulfur dioxide reacts with oxygen and water.

Ammonia (NH3) is a weak base. Melting point of ammonia is -78 Celsius degrees and boiling point is -33 Celsius degrees. Therefore, pure ammonia appears in gaseous form in room temperature.    a) Preparation of ammonia  Gaseous ammonia (NH3) can be prepared by a reaction where Hydrogen gas  (H2) and Nitrogen gas  (N2) reacts. Write a reaction equation to this reaction. Balance the reaction equation if needed.   b) Behavior of gases Explain the diffusion of gases.   c) Change of temperature The closed container filled with gaseous ammonia is moved from room temperature into a freezer. The temperature on freezer is -35 Celsius degrees. Explain shortly on your own words, what kind of changes does the cooling cause and why.

In an industrial process, hydrogen chloride, HCl, is prepared by burning hydrogen gas, H2, in anatmosphere of chlorine, Cl2. Write the chemical equation for the reaction. Below the equation, give themolecular molar and mass interpretations.

A materials scientist has created an alloy containing aluminum, copper, and zinc, and wants to determine the percent composition of the alloy. The scientist takes a 12.849 g sample of the alloy and reacts it with concentrated HCl. The reaction converts all of the aluminum and zinc in the alloy to aluminum chloride and zinc chloride in addition to producing hydrogen gas. The copper does not react with the HCl. Upon completion of the reaction, a total of 10.4 L of hydrogen gas was collected at a pressure of 724 torr and a temperature of 27.0 °C. Additionally, 2.836 g of unreacted copper is recovered. Calculate the mass of hydrogen gas formed from the reaction. mass: ----- g Calculate the mass of aluminum in the alloy sample. mass: ---- g What is the mass percent composition of the alloy? Cu: -----% Zn: ----% Al: -----%

Turn the following words into a balanced chemical equation on your scrap paper. Complete the equation with phase symbols and balance.  a solution of nitrous acid, HNO2 is combined with solid aluminum hydroxide to form water and a solution of aluminum nitrite.