viscous, flammable, hard, malleable
1. a material that can be hit without shattering is?
viscous, flammable, hard, malleable
2. at room temp., a substance with a melting point of 40% c is a?
solid, liquid, gas, mixture
3. what action involves a chemical change?
making ice cubes, adding sugar to tea, cutting wrapping paper, baking a cake
4.a substance that has a little tendency to change into other substance is said to have low?
reactivity, viscosity, density, conductivity
5. formation of a precipitate is usually evidence of?
the separation of a mixture, a chemical change, formation of a mixture, physical change
Answers: 1
Physics, 21.06.2019 16:30, arrazolokhaliapb8sc2
Picture a all traveling at a constant speed around the inside of a circular structure. is the ball accelerating? explain your answer
Answers: 3
Physics, 22.06.2019 02:30, jendun123ovrxij
The particle in a two-dimensional well is a useful model for the motion of electrons around the indole ring (3), the conjugated cycle found in the side chain of tryptophan. we may regard indole as a rectangle with sides of length 280 pm and 450 pm, with 10 electrons in the conjugated p system. as in case study 9.1, we assume that in the ground state of the molecule each quantized level is occupied by two electrons. (a) calculate the energy of an electron in the highest occupied level. (b) calculate the frequency of radiation that can induce a transition between the highest occupied and lowest unoccupied levels. 9.27 electrons around the porphine ring (4), the conjugated macrocycle that forms the structural basis of the heme group and the chlorophylls. we may treat the group as a circular ring of radius 440 pm, with 20 electrons in the conjugated system moving along the perimeter of the ring. as in exercise 9.26, assume that in the ground state of the molecule quantized each level is occupied by two electrons. (a) calculate the energy and angular momentum of an electron in the highest occupied level. (b) calculate the frequency of radiation that can induce a transition between the highest occupied and lowest unoccupied levels.
Answers: 1
1. a material that can be hit without shattering is?
viscous, flammable, hard, malleable
viscous, flammable, hard, malleable
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