If an aqueous solution of lead (II) nitrate (Pb (NO3) 2) is mixed with an aqueous solution of potassium chloride (KCl) the precipitate is:

You place a balloon in a closed vacuum chamber at STP. You reduce the pressure by half. What happens to the balloon? a. It doubles in volumes. b. It stays the same. c. It reduces the size by half.

The rate constant is found to be 3.9 x 10-5 M-1 s-1. Calculate the rate of formation of ozone when the concentration of oxygen atoms is 3.0 x 10-14 molar and the concentration of diatomic oxygen is 1.3 x 10-14 molar.

What does the Law of Conservation state?

Question 2 Unsaved Which of the following chemical formulas shows a covalent compound? a) CO2 b) MgO c) NaCl d) HBr

Which answer describes a chemical reaction in equilibrium? 1. the reactants are all used up 2. all the product is formed 3. the forward and reverse reactions have ceased 4. the forward and reverse reaction rates are the same

How many electrons, protons, neutrons are contained in each atom? A) gallium-69 B) fluorine-23 C) titanium-48 D) tantalum-181

What structure is made from synthetic oil?

Is [h3o + ] = 1.0 * 10-7 m true of acidic, basic, or neutral solutions at 25◦c?

1. Identify whether each of the elements is a metal, non-metal, or metalloid: Ruthenium: Neon: Germanium: Neptunium: Iodine: Strontium: Cesium: Europium:

How do you know which planet is farther away from the sun by years? planet w = 1.9 yrs OR planet x = 11.8 yrs