Chemistry, 16.03.2020 21:54 jessicaa2350
The three naturally occurring isotopes of potassium are 39K, 38.963707u; 40K, 39.963999u; and 41K. The percent natural abundances of 39K and 41k are 93.2581% and 6.7302%, respectively. Determine the isotopic mass of 41K.
Answers: 1
Chemistry, 22.06.2019 00:00, lilyclairehutson
Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.
Answers: 1
Chemistry, 22.06.2019 06:00, rebeccacruzz2017
Calculate - analysis of compound composed of iron and oxygen yields 174.86 of fe and 75.14g of o. what is the empirical formula for this compound?
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Chemistry, 22.06.2019 08:00, wizz4865
Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next
Answers: 2
The three naturally occurring isotopes of potassium are 39K, 38.963707u; 40K, 39.963999u; and 41K. T...
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