Question

One crystalline form of silica (SiO2) has a cubic unit cell, and from X-ray diffraction data it is known that the cell edge length is 0.700 nm. If the measured density is 2.32 g/cm3, how many (a) Si4 and (b) O2- ions are there per unit cell

Name: one crystalline form of silica sio2 has a cubic unit cell and from x ray diffraction data it is known that the cell edge length is 0700 nm if the measured density is 232 gcm3 how many a si4 65624
Uploaded: 2022-09-24T02:13:32-08:00
Duration: 4 min 40 s
Channel: Tianyu Li
Description: one crystalline form of silica sio2 has a cubic unit cell and from x ray diffraction data it is known that the cell edge length is 0700 nm if the measured density is 232 gcm3 how many a si4 65624

          One crystalline form of silica (SiO2) has a cubic unit cell, and from X-ray diffraction data it is known that the cell edge length is 0.700 nm. If the measured density is 2.32 g/cm3, how many (a) Si4  and (b) O2- ions are there per unit cell

Added by Virginia K.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Tianyu Li

09/24/2022

Step 1

Given that the molar mass of SiO2 is 60 g/mol, and the mass of the unit cell is 0.79576 x 10^-21 g, we can calculate the number of Si atoms per unit cell. Number of Si atoms = (mass of unit cell / molar mass of SiO2) = (0.79576 x 10^-21 g / 60 g/mol) = 1.33 x Show more…

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One crystalline form of silica (SiO2) has a cubic unit cell, and from X-ray diffraction data it is known that the cell edge length is 0.700 nm. If the measured density is 2.32 g/cm3, how many (a) Si4 and (b) O2- ions are there per unit cell