An isotope has a mass number of 72 and an atomic number of 3…

An isotope has a mass number of 72 and an atomic number of 34. How many neutrons are in each atom of the isotope?  [red4] How many electrons are in each atom?  [red5] If the isotope gained 2 electrons, what would its charge be?  [red6] Such an ion is called a(n)  [red7]

Use your calculator to complete the following calculations….

Use your calculator to complete the following calculations. Give your answer with the correct number of significant figures.   36.6 / 0.0750             [jim5]   848.8 x 0.6250              [jim6]   (1.206 x 1013) / (6.00 x 106)     [jim7]   (27.001 – 12.866) / 5.000              [jim8]

For the following equation determine the oxidation number fo…

For the following equation determine the oxidation number for each atom in the equation and identify whether the reaction is a redox reaction or not. If the reaction is redox, identify what is oxidized, what is reduced, the oxidizing agent, and the reducing agent.   2Cr + 3CuSO4 –> Cr2(SO4)3 + 3Cu   Reactants Oxidation Numbers:   Cr       [cat1]   Cu       [cat2]   S          [cat3]   O         [cat4]   Product Oxidation Numbers   Cr       [cat5]   Cu       [cat6]   S          [cat7]   O         [cat8]   Is this a redox reaction?            [cat9]   If it is, what is element is oxidized?  [cat10]   What element is reduced?       [cat11]   What element is the oxidizing agent?          [cat12]   What is the reducing agent?                [cat13]

Which of the two objects or substances has the higher energy…

Which of the two objects or substances has the higher energy? Answer with a number, 1 or 2.   A methane molecule, CH4, in the stratosphere or A CH3 molecule and a hydrogen atom formed from breaking one of the carbon-hydrogen bonds in a CH4 molecule? [dog9]   A water molecule moving at 1.63 x 102 mi/hr or the same water molecule moving at 1.81 x 103 mi/hr. [dog10]   Iodine solid or Iodine gas (assume the two systems are at the same temperature) [dog11]   A water molecule moving at 1.63 x 103 Mi/hr or a uranium hexafluoride, UF6, molecule moving a the same velocity. [dog12]