9. Kelly is building a model of a volcano. Her plan involves combining baking soda and vinegar to simulate the eruption of the volcano. She tests the reaction in a glass beaker first. When a
small amount of baking soda and vinegar combine, carbon dioxide is produced, along with
some foam and fizz inside the beaker.
How do the beaker's contents after reaction compare to the contents before reaction?

Using the periodic table, complete the table to describe each atom. type in your answers. a ? b? c? d? e? f?

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.

One nanometer is equal to how many meters?