Answer:
C. n = 6 → n = 2 Violet
D. n = 5 → n = 2 Blue
A. n = 4 → n = 2 Green
B. n = 3 → n = 2 Red
Explanation:
The transitions involved are all to energy level n=2 from higher energy levels. The energy of the emission line correspondingly will reflect a higher energy the greater n is and the color of the emission spectra line will likewise correspond to higher energy. Since the energy of the colors given follow the sequence:
<h3>
Eviolet ⇒ E blue ⇒ Egreen ⇒ E red</h3><h3> 6 to 2 5 to 2 4 to 2 3 to 2</h3>
Remember that the the energy and the frequency of the visible colors is greatest for violet and lowest for red. That is why we refer to ultraviolet light being highly energetic ( sunburn) and infrared gogles which are used for low energy night vision ( the ultra and infra mean beyond visible spectrum)
Hydrogen is kind of a one in itself non metal. Still some other elements like hydrogen are
According to Physical Properties:
Carbon(C)
Nitrogen(N)
Oxygen(O)
Fluorine(F)
Bromine(Br)
According to Chemical Properties:
Lithium(Li)
Fluorine(F)
Sodium(Na)
Chlorine(Cl)
Potassium(K)
Hope it helps
Answer:
2.5milligram
Explanation:
Due to Kr-42 the 20mg will diluted to the experinental evluation
Answer:a) 11.34 g of ethane can be formed
b) is the limiting reagent
c) 3.44 g of the excess reagent remains after the reaction is complete
Explanation:
To calculate the moles :
1.
2.
According to stoichiometry :
1 mole of require 1 mole of
Thus 0.378 moles of will require= of
Thus is the limiting reagent as it limits the formation of product and is the excess reagent.
moles of left = (2.10-0.378) = 1.72 moles
mass of left=
According to stoichiometry :
As 1 mole of give = 1 mole of
Thus 0.378 moles of give = of
Mass of
Thus 11.34 g of ethane is formed.