What is meant by the negative sign in an answer like"-46.8kJ"? When would you use a positive sign

Examine the following false statement. Acids that have a low pH are strong acids while acids that have a high pH are weak acids.

The atomic number and mass number do not change during this type of radioactive decay.

Oxygen is a diatomic gas. How many oxygen molecules are in 16 grams of oxygen? A) 0.5 molecules B) 1.20 x 1024 molecules C) 3.01 x 1023 molecules D) 6.02 x 1023 molecules

I need the equation C14H3O+o2 balanced

Will a double replacement reaction occur if a potassium hydroxide solution is mixed with a lead (II) nitrate solution? Briefly explain.

How to find the number of neutrons in an atom

A balanced chemical equation indicates both the number of particles of reactants and products and the number of a. orbits. c. nuclei. b. electrons. d. moles

To squeeze a gas into a smaller space

Why does soda fizz when you poor it into a cup?

Which of the following does NOT describe acute exposure to hazardous materials? A. Determination of exposure is almost always after the fact. B. Long time period between exposure to an agent and the onset of symptoms. C.