Which of the four containers represents a compound?

A) Cl

B) H2O

C) N2

D) Na

What element on the periodic table has a period of 3, and a group of 5?

Which statement best describes evolution? A. Species have changed over time B. Traits acquired during a lifetime are Passed to offspring C. Earths organisms have not changed overtime D. All of earths organisms were formed at the same time

What what is the equation for percent error

Consider this system at equilibrium. A (aq) B (aq) deltaH=-750kJ/mol What can be said about Q and K immediately after an increase in temperature?

A solution with a pH of 9 has a [OH-] concentration of A. 1.0 * 10-14 mol/L. B. 1.0 * 10-9 mol/L. C. 1.0 * 10-5 mol/L. D. 1.0 * 10-7 mol/L.

One way to experimentally measure the heat capacity of a Styrofoam cup calorimeter would be to melt a known mass of ice in warm water and measure hte temperature change.

What particle is the only one that determine the type of element you have

Wetlands provide habitats for many living things because of their sheltered waters and

What reaction would the chemical equation 2H2O - - > 2H2+O2 represent? A) Replacement Of Water B) Combustion of water c) decomposition of water d) formation of water

He standard reduction potentials of lithium metal and chlorine gas are as follows: reaction reduction potential (v) li + (aq) + e-→li (s) - 3.04 cl2 (g) + 2e-→2cl - (aq) + 1.