How is the gunpowder likely different before and after being set on fire?

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years