Atoms of two different elements must have different

electrical charges.

numbers of neutrons.

atomic numbers.

energy levels.

True or false a scientists opinion is a valid source of information to use in a scientific investigation?

How would you describe the particles that make up a liquid? are the shape and volume of liquids definite or indefinite?

In an acid-base titration, of 20 ml of a m HCI solution with 1 m NaOH. How many ml of NaOH are needed

What mass of sodium chloride contains 4.59 x 10 24 formula units?

A chemistry student must separate should barium sulfate from the aqueous solution. Equipment and glassware normally found in the chemistry classroom are available to the student.

Although nuclear energy has many applications, concerns still remain in the area (s) of: control of facilities and waste products accidental spills, leakage and theft of materials lack of safety training for employees all of these

A 0.08024 M solution of NaOH was used to titrate a solution of unknown concentration of HCl. A 32.08 mL sample of the HCl solution required 16.30 mL of NaOH solution for complete reaction. What is the molarity of the HCl solution?

Explain in terms of collision theory, how and why a reactions's rate changes as the reaction progresses

Scientific knowledge Instruction Active Comparing Science and Pseudoscience Which are examples of science rather than pseudoscience? Check all that apply.

Oxalic acid is a diprotic acid. calculate the percent of oxalic acid (h2c2o4) in a solid given that a 0.7984-g sample of that solid required 37.98 ml of 0.2283 m naoh for neutralization.