Observations that deal with descriptions that cannot be expressed in numbers are called

a.

manipulated observations.

c.

qualitative observations.

b.

quantitative observations.

d.

operational observations.

What are two methods of writing a balanced formula?

In the reaction of calcium with chlorine which atom is the oxidizing agent

What was johann dobereiners contribution to the development of the periodic table

Do you think it is likely that a major volcanic eruption will occur on the mainland of the United States

An atom of beryllium (m = 8.00 u) splits into two atoms of helium (m = 4.00 u) with the release of 92.2 kev of energy. if the original beryllium atom is at rest, find the kinetic energies and speeds of the two helium atoms

What is the mass of an original 5.60-gram sample of iron-53 that remains unchanged after 25.53 minutes?

What happens as a result of the kinetic energy of the particles in a liquid being comparable with the intermolecular attractions between the particles? A The particles do not move enough to change positions, so the liquid is not compressible.

How many moles are im 8.31x1023 molecules of h2so4

Which terms most precisely describes the cellular process of breaking down large molecules into smaller ones?

A gas in a rigid container is heated so that it's kelvin temperature doubles. What happens to its pressure