Answer:
Most igneous, metamorphic, and sedimentary rocks contain rubidium (Rb) and strontium (Sr) in detectable amounts. However, the concentrations of these elements are almost always less than 1 percent, and they are therefore rarely determined in routine chemical analyses. Neither rubidium nor strontium is a major constituent in the common rock-forming silicate minerals, although strontium does form a carbonate (strontianite) and a sulfate (celestite) which are found in some hydrothermal deposits and certain sedimentary rocks, particularly carbonates.
Explanation:
4. It is equal to the momentum of object 1 plus the momentum of object 2
First, we write an equation for the reaction of Hydrogen and Oxygen to produce water:
H₂ + O₂ ⇒ H₂O
This equation is not balanced, we then balance the Oxygens:
H₂ + O₂ ⇒ 2H₂O
And now the Hydrogens:
2H₂ + O₂ ⇒ 2H₂O
Therefore, if one mole of Oxygen reacts, it will require two moles of Hydrogen and produce two moles of water.
Cadmium
Cadmium is the element named after a mythological sower of dragon's teeth known as Cadmus. Cadmus was the first king of Thebes and the greatest hero who slayed monsters before the times of Heracles. Cadmium is a toxic, soft, bluish-white metal that forms complex compounds. Cadmium is abbreviated with the symbol Cd, located in group 12 of the periodic table and it has the atomic number 48. Cadmium is inflammable and does not dissolve in water.