How many neutrons does an element have if its atomic number is 52 and its mass number 154

150.0 grams of asf3 were reacted with 180.0 g of ccl4 to produce ascl3 and ccl2f2. if the actual yield of ccl2f2 was 127 g, what is the percent yield?

George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.