Answer:
a
Explanation:
A Gamma rays is the best wavelength for an astronomer to use to study the composition of planets and stars
2 moles of water are produced. Here, hydrogen is the limiting reagent. 1 mole of oxygen is used up with 2 moles of hydrogen to form 2 moles of water. 1 moles of oxygen remains.
C. Ninhydrin is used to detect prints on a non-porous surface
PbCl2 would not dissolve because it is insoluble based on the solubility rules for substances that will dissolve in water. This compound would instead form a solid precipitate at the bottom of the container.
