In an experiment using a calorimeter, the following data were obtained: what is the total number of joules absorbed by the water?

A.) 1,000

B.) 1,500

C.) 6,300

D.) 4,500

How do you explain why the addition of silver nitrate to the Fe/SCN equilibrium had an effect on the equilibrium, even though neither silver ion nor nitrate ion is written as part of the equilibrium reaction?

What substance makes the earths crust

Predict What has the weakest intermolecular attractions based only on vapor pressure data. (a) butyl alcohol (vapor pressure at 293 K = 6 torr) (b) ethyl ether (vapor pressure at 293 K = 450 torr) (c) pentane (vapor pressure at 293 K =

In an experiment, a student wants to increase the rate of a reaction that involves gases. Which change to the reactants would accomplish this?

Where does radioactivity come from? A. The nuclei of unstable isotopes B. Physical changes in atoms C. Chemical reactions D. The breaking of chemical bonds

How does a runoff get polluted.

Anatom that has lewer neutrons than protons and more electrons than protons is

Which can have either a positive charge or a negative charge when they are released during radioactive decay? A. alpha particles B. beta particles C. positrons D. photons

Which ionic compound is water soluble? A. cuS B. NH4NO3 C. SrSO4 D. ZnF

What is part of an experiment that is not being tested and is used for comparison