Chemistry, 03.06.2021 20:40 macylen3900
The mass number of an atom of an element is 55. The number of neutrons in it is 5 times greater than the atomic number. How many protons, neutrons and electrons are in this atom? What element does this atom represent?
Answers: 2
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If the particles in a sample of matter have an orderly arrangement and move only in place, the sample is a
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The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н,о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.
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At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure
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Which of these statements explains the difference between nuclear binding energy and the strong nuclear force ?
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The mass number of an atom of an element is 55. The number of neutrons in it is 5 times greater than...
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