On a mission to a newly discovered planet, an astronaut finds copper abundances of 69.97 % for 63cu and 31.03 % for 65cu. what is the atomic mass of copper for this location?
the mass of 63cu is 62.9300 amu . the mass of 65cu is 64.9200 amu .
express your answer to two decimal places, and include the appropriate units.

Ase your answer to this question on the information below.hydrocarbons and fissionable nuclei are among the sources used for the production of energy in the united states. a chemical reaction produces much less energy than a nuclear reaction per mole of reactant.the balanced chemical equation below represents the reaction of one molecule of a hydrocarbon with two molecules of oxygen.chemical equation: ch4 + 2o2 → co2 + 2h2o + 1.48 × 10−18 jthe nuclear equation below represents one of the many possible reactions for one fissionable nucleus. in this equation, x represents a missing product.nuclear equation: write an isotopic notation for the missing product represented by x in the nuclear equation.

How many atoms are there in 5.70 mol of mg

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?