If w is a complex cube root of unity then find the value of (1-w-w²)³ + ( 1-w+w²)³
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Related Questions
Determine percentage of oxygen in ammonium nitrate.
A.60%
B.80%
C.70%
D.55%
Answer
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Hint:We can calculate the percentage of oxygen in ammonium nitrate by calculating the required mass of oxygen atoms from the number of moles of oxygen and the molar mass of ammonium nitrate. The mass of oxygen atoms is calculated by multiplying the number of moles of oxygen atom present in the ammonium nitrate and atomic weight of oxygen atom.
Formula used: We can calculate the mass percent using the formula,
Masspercentage = GramsofsoluteGramsofsolution X 100%
Complete step by step answer:
Let us first calculate the molar mass of ammonium nitrate compound.
We know that,
The molar mass of hydrogen is 1 g/mol
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Answer:
Dear here is ur solution,
=(1-w-w²) ³(1-w+w²) ³ 3
On solving first [1-(w+w²)] ³
3 We know that 1+w+w²=0 So w+w²=-1 On solving second (1-w+w²) 3
Putting its value
[1+1]³=8
3 =[(1+w²) -w] ³
Putting value of 1+w²=-w (-w-w) 3=-8w³
We know that w³-1 so -8w³=-8
Hence (-8)x8 =-64
Step-by-step explanation:
hope it will help mannaseo bangawoyo joh-eun halu bonaeseyo