A stock solution has a concentration of 55.0 g/L. A 16.600 g/L solution is required. If you use a 250.0 mL volumetric flask for the dilution, what volume (in mL) needs to be taken from the stock solution?

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.

A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.