Chemistry, 16.12.2020 21:40 HighSchool97654
Energy that enters or leaves a system during a chemical reaction comes from
A. the building and breaking of chemical bonds.
B. the conversion of mass to energy.
C. heat absorbed from the surroundings.
D. the kinetic energy of electron motion.
Answers: 1
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A__ is two or more substances that are together in the same place but are not chemically combined
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Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?
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Arectangle has a diagonal 20 inches long that forms angles of 60 and 30 with the sides. find the perimeter of the rectangle. for geometry
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Which statement best describes the liquid state of matter? a. it has definite shape but indefinite volume. b. it has definite shape and definite volume. c. it has indefinite shape and indefinite volume. d. it has indefinite shape but definite volume.
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Energy that enters or leaves a system during a chemical reaction comes from
A. the building and bre...
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