Looking across period 4 of the periodic table, potassium (atomic number 19) is followed by calcium (atomic number 20), which is followed by scandium (atomic number 21). Which element should have the largest atomic radius?

Denver wonders if adding salt to water will make it boil at a lower temperature. What should he do next in order to follow the steps of inquiry?

Radiocarbon measurements made in 1988 on the shroud of turin showed a decay rate of 14.2 disintegrations/min per gram of carbon. this is in comparison to the decay rate in the then current living organisms of 15.

A chemistry student needs of isopropenylbenzene for an experiment. She has available of a w/w solution of isopropenylbenzene in carbon tetrachloride. Calculate the mass of solution the student should use.

A) Diamond and graphite are two different forms of pure elemental carbon with densities of 3.51 g/cc and 2.25 g/cc respectively. What volume would be occupied by a 0.50 g diamond? What volume would be occupied by a 0.50 g piece of graphite?

What is the percent by volume of 15.0 ml of ethanol in 0.250 l of water?

Which of the following types of models is usually in the form of a drawing graph or equation

The strongest intermolecular interactions between pentane (c5h12) molecules arise from

Stress will build until an earthquake occurs if friction along a fault is

Consider the reaction below. Mg (s) + 2HCl (aq) - - > H2 (g) + MgCl2 (aq) What is the most likely effect of an increase in pressure on this reaction? The reactant surface area increases. The reaction rate decreases.

In experiment 6 we will perform a Fischer Esterification (Vollhardt, chapter 9-4 and 19-9). Suggest what could happen if you were to attempt recrystallization of a carboxylic acid with ethanol or an ester with water.