The molar mass of calcium is 40.08, oxygen is 16.0, and hydrogen is 1.01. what is the mass of one mole of calcium hydroxide (ca(oh)2)?

If 10.5 l of a at 0.98to 1.50 , is ?

A0.10 m aqueous solution of sodium sulfate is a better conductor of electricity than a 0.10 m aqueous solution of sodium chloride. which of the following best explains this observation? (a) sodium sulfate is more soluble in water than sodium chloride. (b) sodium sulfate has a higher molar mass than sodium chloride. (c) to prepare a given volume of 0.10 m solution, the mass of sodium sulfate needed is more than twice the mass of sodium chloride needed. (d) more moles of ions are present in a given volume of 0.10 m sodium sulfate than in the same volume of 0.10 m sodium chloride. (e) the degree of dissociation of sodium sulfate in solution is significantly greater than that of sodium chloride.

When scientists are ready to publish the results of their experimentation, why is it important for them to include a description of the procedures they used?