Answer:
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The order of reactivity series is Most reactive metals are at the top while the least reactive metals are at the bottom.
A reaction series is a list of metals arranged in descending order of reactivity. The most reactive metals are on top and the least reactive metals are on the bottom. If there are any two metals in the column, the metal placed at the top of the column can displace the bottom metal from the brine.
The more reactive the metal the faster the reaction. Metals below hydrogen in the reaction sequence do not react with dilute acids. Platinum is placed below gold in the reaction sequence. The elements in the lower left corner of the periodic table are the most active metals in the sense that they are the most reactive.
Learn more about The Reactivity series here:- brainly.com/question/17469010
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The largest energy release will take place when the electron jumps between the greatest number of levels. In this case from infinity down to 2
This is the emitted photon with the most energy ( in the Balmer series), the highest frequency and therefore the shortest wavelength.
Balmer's original formula was
Wavelength = 3645.6 . 10^–10 ( n^2 / (n^2 – 4) )
When n => infinity
Wavelength = 3.6456 . 10^–7 m ( or 364.5 nm)
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Answer:
92.75%
Explanation:
The overall chemical equation for the reaction in the preparation of alum from the aluminium can be expressed as:
From above; we will see that 2 moles of Aluminium react with sulphuric acid and water to produce 2 moles o aluminium alum.
Therefore, the theoretical yield can be determined as:
= 4.789g of 
To find the percent yield, we need to divide the actual yield by the theoretical yield and then multiply it with 100.
∴
percent yield = ( mass of alum(g)/theoretical yield(g) ) × 100
percent yield = ( 4.789g / 5.1629g ) × 100%
percent yield = 0.9275 × 100%
percent yield = 92.75%
Thus, the percent yield of the experiment 92.75%
