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Nuclear Reaction Question

In spontaneous nuclear reactions: a. the products weigh less than the reactants b. the products weigh more than the reactants c. the difference in mass between reactants and products is zero d. mass is converted to light e. the products move at the speed of light squared

Finding molarity and the reactions and productions of a balanced equation

1.) What is the molarity of a solution made by dissolving 25.6 g of KOH (5601 g/mol) in enough water to make 3.00 L of solution? 2.) 2 Fe + 3 Cl2 ------> 2FeCl3 How many moles of Fe are needed to produce 76.4 g of FeCl3 (162.3 g/mol)? How many grams of Fe (55.8 g/mol) are needed to react with 123 g or cl2 (71.0 g/mo

Multiple choice question about the relationship between Q and Kp.

If the value of Q is greater than Kp, then a. the system is in equilibrium b. the reaction will proceed to the right until equilibrium is established c. a catalyst is necessary to achieve equilibrium d. the reaction will go left or right depending on the reaction stoichiometry e. the reaction will proceed to

Chemistry multiple choice questions (chem-2)

1. A collection of atoms, molecules, or ions that contains Avogadro's number of these items is called what? 2. The initial substances that undergo change in chemical reaction are called what? 3. The law that states that atoms are neither created nor destroyed in a chemical reaction, but may be rearranged, is called what? 4. T

Charge in a copper coin

A copper coin has a mass of 3 g. What is the total charge of all the electrons in it ? Given that the atomic number of Cu is Z = 29 and the atomic mass is 63.5 g/mole.

Products of Radioactive Decays

What are the products of the following radioactive decays? A. Alpha emission by: 162 Re 75 B. Beta emission by: 188 W 74 C. Positron emission by: 165 Ta 73

Production of Oxygen

The following reaction is used in laboratories to produce oxygen: 2KclO3 (s) ----> 2KCl (s) + 3O2 (g) At 25 degrees Celsius and one atmosphere pressure, how many liters of O2 gas will be produced from the reaction of 165g of KClO3? See attachment for better equation.


1. Find out 2 or 3 uses for mercury. 2. For each use find out why mercury was chosen for the job 3. What are the dangers from using mercury.

Converting grams to kilojoules.

Burning 2.00g of propane, C3H8, produces 99.78 kJ of energy. How much energy is produced when one mole of the propane burns?