A chemical takes a soil sample to determine the mineral composition of the soil?

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

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

A650 ml sodium bromine solution has a bromide ion concentration of 0.245 m. what is the mass (g) of sodium bromide in solution? a) 103.b)0.00155.c)16400.d) 16.4.e) 0.159