Which response includes all of the following that involve PHYSICAL changes, and none that involve chemical changes? a. rusting of an iron nail b. melting of gold c. digestion of food d. combustion (burning) of coal e. condensation of steam    

How many protons, neutrons and electrons are there in an atom that has an atomic number of 54 and a mass number of 129? [protons], [neutrons], [electrons] What is the symbol for the element? [symbol]

How many electrons are present in a SINGLE chlorine atom with a mass number of 35? 

What would you multiply atoms of scandium (Sc) by to get the units moles of scandium?

Which response lists all the substances below that are mixtures and not any pure substances? a. oxygen b. wine c. baking soda (NaHCO3) d. soil e. Cu

Which one of the following lists units of volume in decreasing order (from largest to smallest)?

If necessary, use the Periodic Table below to answer the questions that follow. 

How many atoms of oxygen are in one molecule of Al(NO3)3?

Use whichever of the following equations necessary to convert 383 K to Fahrenheit. (Use only these equations – decimal answers will not be accepted) °C = 5/9 (°F – 32) °F = 9/5 (°C) + 32 °C = K – 273  

Which of the following correctly classifies the substance, CO2?