Iodide-131 decays with half life of 8.02 d. In a Sample initially containing 5.00 mg of I 131, what mass remains after 6.01 d?

An electron charge e mass m and a positron charge e mass m revolve around their common center of mass under the influence of their attractive coulomb force Find the speed v of each particle in terms of e m k and their separation L

What is included in a compaarative investigation

A farmer uses water to irrigate his potato crops. Which roles of water does this examplify

Which type of bond is formed between magnesium and oxygen? A. ionic B. metallic C. polar covalent D. nonpolar covalent

Which ocean borders Africa on the western coast? Arctic Ocean Indian Ocean O Pacific Ocean Atlantic Ocean

If the molar mass of NaCl is 58.44 g/mol, what amount of NaCl (in mol) is contained in 250.0 mg of NaCl?

Which has more surface area, a rock the size of your hand or a handful of small rocks?

4Al (s) + 3O2 (g) - >2Al2O3 (s) the reaction is started by mixing 10.0g of Al and 10.0g of O2. What is the limiting reaction and how much Al2O3 is produced?

F 3.84 moles of methane are consumed in this reaction, how many moles of HCN will be produced?

Two metals with equal mass and different heat capacities are subject to the same amount of heat; which undergoes the smallest change? a) The metal with the higher heat capacity. b) The metal with the lower heat capacity.