A bottle of cleaning fluid has a total mass of 2.25 kilograms, 315 grams of which is HCl. What is the mass percentage of HCl in this solution? (make sure your mass units are the same - convert both to either kilograms or grams) :)

Subduction zones occur on earth where dense oceanic crust dives under more buoyant continental crust. these boundaries are characterized by a deep ocean trench next to a high continental mountain range, large numbers of earthquakes and volcanoes. all of this is further evidence for the a) big bang theory b) origin of the species eliminate c theory of plate tectonics d theory of natural selection 4 sedimentary rocks found high in the himalayen mountain

Which of the following statements about acidic water is true? a. acid has no effect on the h,o molecules. b. the solution contains a larger number of oh ions than h,o ions. c. the solution contains a larger number of h,o ions than qh ions. d. the solution contains an equal number of h,o ions and oh ions. none of the above e.

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation: