A sample may contain any or all of the following ions: hg22+, ba2+, and mn2+. (a) no precipitate formed when an aqueous solution of nacl was added to the sample solution. (b) no precipitate formed when an aqueous solution of na2so4 was added to the sample solution. (c) a precipitate formed when the sample solution was made basic with naoh. Which ion or ions are most likely present in the sample solution? (select any that apply. ).

Heights of men on a baseball team have a bell-shaped distribution with a mean of 177 cm and a standard deviation of 6 cm. using the empirical rule, what is the approximate percentage of the men between the following values? a. 159 cm and 195 cm b. 165 cm and 189 cm a. 89% of the men are between 159 cm and 195 cm. (round to one decimal place as needed.) b. 89% of the men are between 165 cm and 189 cm. (round to one decimal place as needed.)

Three important things a musician must do for a superior performance. essay

Which statement best describes gravity? it is the force that repels only very small objects. it is the force that acts between objects with zero mass. it is the force that sometimes acts only on very large objects. it is the force that acts between any two objects in the universe.