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The atomic number of an element is 35 and mass number is 81. The number of electrons in the outer most shell is:
(1) 7
(2) 6
(3) 5
(4) 3
Ans: 7
Calculate the molarmass of a nonelectrolyte that lowers the freezing point of 25.00g of water to -3.9 degrees C when 4.27 g of the substance is dissolved in the water.
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