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.

How would you quickly determine whether a cleaning agentcontained sodium carbonate or sodium phosphate?

Number of moles in 36 grams of Helium

1. During a lab activity, students calculate the density of an element to be 7.78 g/cm3. The density listed on the periodic table is 7.13 g/cm3. Calculate the percent error and identify the element. 2.

What is the difference between an atom and a mixture?

Calculate the ph of a 0.30 m cocl3 solution. the ka value for co (h2o) 63 is 1.0 ✕ 10-5.

According to the kinetic molecular theory, when a gas particle hits something what will happen?

Protons and neutrons are made from which of the following? hadrons down quarks only up quarks and down quarks up quarks only

Not all of the water falls as rain, snow, or sleet evaporates. What happens to the rest of the water?

58.5 million excess electrons are inside a closed surface. What is the net electric flux through the surface?.

Nitrogen monoxide and oxygen, both colorless gases, form a red-brown gas when mixed. Nitrogen monoxide and oxygen are called the