Is pencil lead a heterogeneous or homogeneous mixture?

Approximately how many moles of N2 are in 200 moles of clean dry air?

If you dilute 25.4mL of a 3.5M solution to make 166.7mL of solution, what is the molarity of the dilute solution

When gases are compressed, the particles are forced closer together.

Write the equilibrium constant expression for the reaction below. CS2 (g) + 4H2O (g) ⇌ CH4 (g) + 2H2S (g)

What are the allowed values for each of the four quantum numbers: n, l, ml, and ms?

Why does conduction occur in solids and liquids easier compared to gases? Because the particles in gases are closer together and move slower Because the particles in gases are farther apart and move faster.

Write a balanced equation for the combustion of gaseous methane (CH4), a majority component of natural gas, in which it combines with gaseous oxygen to form gaseous carbon dioxide and gaseous water.

Pedro listed characteristics of two types of protists in a chart. Two Groups of Protists X Y Often multicellular Are usually autotrophic Include euglenoids Are heterotrophs Reproduce using spores Include different molds Which headings best complete

Which of the following is a characteristic of nonmetals? a. nonmetals are often shiny and hard. b. nonmetals are often malleable. c. Nonmetals do not conduct electricity. d. nonmetals are often ductile.

How does a change in temperature affect the kinetic energy of the particles in a reaction?