What does an atomic number represent in an atom? 1. Number of protons 2. Number of electrons. 3. Number of neutrons. 4. Number of protrond and neutrons

Zinc reacts with hydrochloric acid according to the reaction equation how many milliliters of 3.50 m hcl (aq) are required to react with 2.25 g of zn (s) ?

The average kinetic energy of the particles in a gas A. is not affected by the temperature of the substance. B. increases as the temperature of the substance decreases. C. is proportional to the temperature of the substance. D.

The ductility of a material is the measure of a) The amount of elastic deformation that can be sustained before yielding b) The capacity of a material to absorb energy when it is deformed elastically c) The degree of plastic deformation that has

Which molecule will form a solution with a very low pH? H3PO4 H2O NaOH KOH

What are the sign of a chemical change and the sense you might use to detect it.

Calculate the energy for one mole of photons (an einstein) for light absorbed at 6.90 * 102 nm.

What is A for ClO3, the chlorate ion?

The pH of a solution is 4.3. What is the pOH?

Always report their observations and results truthfully

At ph 1.8, dichloroacetic acid is 8% dissociated. what is the pka for dichloroacetic acid?