What could J. J. Thomson conclude from his experiments? Atoms are mostly empty space. Most of the mass of the atom is concentrated in the center. Atoms must balance positive and negative particles. Atoms are indivisible.

The energy diagram shown represents the chemical reaction between solid ammonium chloride and solid barium hydroxide octahydrate: 2NH4Cl (s) + Ba (OH) 2⋅8H2O (s) →2NH3 (aq) + BaCl2 (aq) + 10H2O (l) The ΔH for this reaction is 54.8 kJ.

Which of the following represents A Bronsted-Lowry conjugate acid base pair

1. The sum of the masses on the reactant side must equal

Whats a particles wave

27 Which energy conversion must occur in an operating electrolytic cell? (1) electrical energy to chemical energy (2) electrical energy to nuclear energy (3) chemical energy to electrical energy (4) chemical energy to nuclear energy

Discuss why two objects of made of the same type of matter at the same starting temperature with different masses increase in temperature at different rates when the same amount of thermal energy is transferred to each object.

An isotope contains 56 protons, 54 electrons, and 74 neutrons. What is the identity of the isotope?

How many ozone particles are needed to form 24 particles of oxygen gas?

Calculate the molality of a 27.0% (by mass) aqueous solution of nitric acid.

What is the percent of carbon-14 remaining after two half-lives?