When water is added to a write powder 'A', vigorous reaction takes place and a large amount of heat is released. 'A' is also used for white washing. Identify 'A', write a chemical equation for its reaction with water and name the product.

Combustion of hydrocarbons such as dodecane (C1,H26) produces carbon dioxide, a "greenhouse gas." Greenhouse gases in the Earth's atmosphere can trap the Sun's heat, raising the average temperature of the Earth. For this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide. 1. Write a balanced chemical equation, including physical state symbols, for the combustion of liquid dodecane into gaseous carbon dioxide and gaseous water. O-0 Ox10 2. Suppose 0.140 kg of dodecane are burned in air at a pressure of exactly 1 atm and a temperature of 12.0 °C. Calculate the volume of carbon dioxide gas that is produced. Round your answer to 3 significant digits.

A solution of CaCl₂ in water forms a mixture that is 35.0% calcium chloride by mass. If the total mass of the mixture is 517.0 g, what masses of CaCl₂ and water were used? mass of CaCl₂: mass of water: g g

Complete the table below by deciding whether a precipitate forms when aqueous solutions A and B are mixed? If a precipitate will form, enter its empirical formula in the last column.

A barium hydroxide solution is prepared by dissolving 3.22 g of Ba(OH), in water to make 58.1 mL of solution. What is the concentration of the solution in units of molarity? concentration: The barium hydroxide solution is used to titrate a perchloric acid solution of unknown concentration. Write a balanced chemica equation to represent the reaction between barium hydroxide and perchloric acid. chemical equation: If 18.5 ml of the barium hydroxide solution was needed to neutralize a 8.04 mL aliquot of the perchloric acid solution, what is the concentration of the acid? concentration:

Combustion of hydrocarbons such as heptane (C,H,6) produces carbon dioxide, a "greenhouse gas." Greenhouse gases in the Earth's atmosphere can trap the Sun's heat, raising the average temperature of the Earth. For this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide. 1. Write a balanced chemical equation, including physical state symbols, for the combustion of liquid heptane into gaseous carbon dioxide and gaseous water. 2. Suppose 0.110 kg of heptane are burned in air at a pressure of exactly 1 atm and a temperature of 12.0 °C. Calculate the volume of carbon dioxide gas that is produced. Round your answer to 3 significant digits.

imagine that a 2.0 m colution of copper 2 chloride is added to a piece of aluminum.  draw a particulate representation of the mixture after any reaction has completed

What is conservation of energy and how does it relate to chemical reactions? Determine how energy is transferred during phase changes. What happens if you add heat? Remove heat?

1) Group 1 metals react almost instantly and violently with water, as a single replacement reaction to produce an aqueous solution of metal hydroxide and hydrogen gas. A sample of solid lithium weighing 84.25 mg is dropped into a beaker containing 50.0 mL of water. Assume the density of water is 0.9988 g/mL. a) Write the balanced equation. b) Calculate the theoretical yield (in grams) of lithium hydroxide. c) Assuming the reaction is complete, and that there is no volume change, what is the concentration (in M) of lithium hydroxide in the solution that results?

One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is by titrating a sample of silver nitrate, solution. Any chloride anions in solution will combine with the silver cations to produce bright white silver chloride precipitate. Suppose an EPA chemist tests a 200. mL sample of groundwater known to be contaminated with cadmium chloride, which would react with silver nitrate solution like this: CdCl2(aq) + 2 AgNO3(aq) → 2 AgCl(s) + Cd (NO3)2(aq) The chemist adds 89.0 mM silver nitrate solution to the sample until silver chloride stops forming. He then washes, dries, and weighs the precipitate. He finds he has collected 5.4 mg of silver chloride. Calculate the concentration of cadmium chloride contaminant in the original groundwater sample. Be sure your answer has the correct number of significant digits. E d OL E