Classify each of the following as a pure substance, a mechanical mixture, or a solution. Soil, Perfume, Baking powder, Glass cleaner.

How many atoms are in 1 mole of fluorine

The Group 8A (18) elements The Group 8A (18) elements are unreactive and are rarely found in combination with other elements. are good conductors of electricity. react vigorously with water. are liquids at room temperature. melt at high temperatures.

During which changes of state does the motion of the atoms decrease? melting and deposition freezing and condensation condensation and evaporation vaporization and sublimation

The dihydrogenphosphate ion, H2PO4 - is amphiprotic. In which of the following reactions is this ion serving as a base?

What units should they have used in order to make the correct conversion

Heat is an exchange of internal energy from one system to another due to A. a temperature difference between the systems. B. one system being gas and the other being solid. C. the systems having the same temperature. D.

Sierra did 500 J of work to move her couch. If she exerts 250 N of force on the couch, how far did she move it? (Work: W = Fd) 0.5 m 2 m 250 m 750 m'

Lead (ii) sulfide (pbs) has a ksp of 3.0 * 10-28. what is the concentration of lead (ii) ions in a saturated solution of pbs? 1.7 * 10-14m 1.5 * 10-14m 3.0 * 10-14m

A 2.17 gm sample barium reacted completely with water what is the equation for the reaction how many milliliters of dry H2 evoled at 21degree celcius and 748mm of Hg?

What does it mean for data to be continuous?