A student diluted 1ml of a stock solution (1M) of a compound with 9 ml of water. Then took 1ml from that solution and diluted with another 9ml of water. Then took 10ml of the resultant solution and added 90ml of water. What is the final concentration of the solution

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium