What is the oxidation number for each atom in calcium perchlorate,

Ca (CIO4) 2?

the reaction rate constant for a particular second order reaction is 0.47 L/mol sec. If the initial concentration of reactant is. 25 mol/L, how many seconds will it take for the concentration to decrease to. 13 mol/L

An experiment can have more than one independent variable. True False

If there is a loss of 5.63 x 10-7kg of mass in a nuclear reaction, how many Joules of energy would be released? Recall that c = 3x108 m/s 3.92 x 104 3.92 x 1010 5.07 x 107 5.07 x 1010 6.26 x 10-24

Write a question about how changing temperature affects a gas.

How natural plants and wetlands purify water

How many moles of water are made from complete reaction of 1.4 moles of hydrogen gas? Given the reaction: 2H2 + O2 → 2H2O

A scientific law is 1. A university accepted conclusion based on testing 2. Always changing a new evidence is presented 3. Based on new evolving theories 4. Often debated in the scientific community 5. One step toward forming a theory

12 Two molecules of HBr collide and then form H2 and Br2. During the collision, the bonds in the HBr molecules are

If the two charges represented in the figure were brought near each other, they would a. have no effect on each other. b. repel each other. c. cause static discharge. d. attract each other.

A gas tank holds 20000 liters at 850 torr. If the temperature remains constant, what will the volume, in L, of the gas be at standard pressure, 760 torr?