Which event would be impossible to explain by using john dalton’s model of the atom?
an iron atom emits particles when it is struck by light.
an oxygen atom combines with two hydrogen atoms to form water.
an acid reacts with a base to form salt and water.
the atoms in sodium metal react with water

Using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 pb+2(aq) + 2cl -(aq). if the value of ksp was determined to be only 1.2 x 10-2: too much solid has dissolved. additional precipitate is forming. the solution is unsaturated. the ions are now combining to reduce their concentrations.

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium

Determine the length of the object shown. 97.8 mm 97.80 mm 97 mm 98 mm