NaHCO3 -> NaOH + CO2 If 20.0 grams of sodium hydroxide are actually produced when you did the
experiment, calculate the percent yield.

What is the amount of energy for a photon that has a 125 cm wavelength

The image compares the arrangement of electrons in two different neutral atoms. a figure labeled atom q has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has six black spheres. to the left of this figure is another figure labeled atom p. atom p has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has seven black spheres. which of the following best explains the position of the two atoms in the periodic table?

What can a drop of liquid mercury be described as?