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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
Solid State

NTA Abhyas 2020 · Chemistry · Solid State

Iron crystallizes in body centered cubic system with edge length...

Iron crystallizes in body centered cubic system with edge length 2.86A˚\text{2}\text{.86}\text{Å} . The density of iron is nearly 'X' g/ml. What is the value of 'X' here?
Report your answer by rounding it upto nearest whole number.

Correct answer

8

Step-by-step solution

As d=Zma3NA=2×56(2.86×10−8)×6.02×1023d = \dfrac{Zm}{{a}^{3}{N}_{A}} = \dfrac{2 \times 56}{\left(2.86 \times 1{0}^{- 8}\right) \times 6.02 \times 1{0}^{23}}

≈7.92gcm3≃8g cm3\approx 7.92gc{m}^{3} ≃ 8\text{g c}{\text{m}}^{3}

≃8g/ml≃ 8g / ml
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