Chemistry, 30.01.2020 18:58 ezrabailey100
Which of the following can only be separated into two or more pure substances by a chemical change?
a. an element
b. a compound
c. a homogeneous mixture
d. a heterogeneous mixture
Answers: 3
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What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?
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An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?
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Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus. sodium’s electron affinity value is more negative than the electron affinity value of phosphorus. phosphorus’ electron affinity value is more negative than the electron affinity value of sodium. this information cannot be determined using the periodic table. answer is b on e2020.
Answers: 3
Which of the following can only be separated into two or more pure substances by a chemical change?...
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