An acid with the general formula RCOOH is used to make a 0.10 M solution in water. The pH of this acid solution is measured as 3.8. Calculate the extent of dissociation of this acid in the prepared solution. (The extent of dissociation is the fraction of the acid that is dissociated into the RCOO- anion and H3O cation in the aqueous solution.)

About 70 percent of the earth's surface is water-covered, and about 96.5 percent of all earth's water is salt water. identify the watery feature on earth that is made of freshwater rather than salt water. a) bay b) glacier c) ocean d) sea it is not incomplete this is the true question

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

  the mississippians were considered to be  horticulturalists, which means they were