How many unit cells are present in a cube-shaped ideal crystal ofNaCI – InterviewSolution

1.	How many unit cells are present in a cube-shaped ideal crystal ofNaCI of mass 1 .00 g? [Atomic masses : Na = 23, Cl = 35.5]
Answer» `5.14xx10^(21)` unit CELLS `1.28xx10^(21)` unit cells `1.71xx10^(21)` units cells `2.57xx10^(21)` unit cells Solution :Number of formulas in CUBE shaped crystals `=(1.0)/(58.5)xx6.02xx10^(23)` since in NACL TYPE of structure. 4 formula units form 'a' cell `therefore `unit cells`=(1.0xx6.02xx10^(23))/(58.5xx4)=2.57xx10^(21)` unit cells.

Discussion

No Comment Found

Related InterviewSolutions

Which of the following compounds is not cleaved by HI even at 525 K ?
To a 25 mL H_(2)O_(2) solution excess of an acidified solution of potassium iodide was added. The iodine liberated required 20 " mL of " 0.3 N sodium thiosulphate solution Calculate the volume strength of H_(2)O_(2) solution.
The suggested mechanism of a reaction is : (a) A+BhArrD("fast) "(b)A+Drarr2C("slow")Write the balanced equation of the reaction if its experimentally deduced rate equation is , rate k=[A]^(2)[B] Find the intermediate formed during the course of the reaction . Does the predicted rate law from the mechanism match the experimental rate law ?
Which of these changes with time for a first-order reaction A Rate of reaction B . Rate constant C . Half-life
What is the hybridisation of central atom in the product obtained along with hydrofluoric acid when complete hydrolysis of Xenon Hexa Fluoride takes place ?
Which of the following amino acid forms sulphide bond in polypeptide
Which of following pair is Diastereomers:
What is the major product of the following reaction CH_3C-=C-CH_2-CH_3overset("1 mole of " Cl_2)to
Which polymer is used in petrol tank linings ?
Which of the following carbohydrates are branched polymer of glucose ?