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? the atomic weights of si and o are, respectively, 28.09 g/mol and 16.00 g/mol.

answer:

i am not 100% sure but i think it is a.)

dont take my word for it

explanation:

answer:

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explanation:

answer:

// here is code in C++.

#include <bits/stdc++.h>

using namespace std;

//main function

int main()

{

  // variable

 int n;

 cout<<"enter a number:";

 // read the input

 cin>>n;

 // find the square root of the absolute value

 float square_root=sqrt(abs(n));

 // print the square_root

 cout<<"square root of "<<n<<" is: "<<square_root<<endl;

  return 0;

}

Explanation:

Read a number from user and assign it to "n".Then find its absolute value with abs() function.Then calculate the square root of the absolute value with sqrt() function.Print the square root of the number.

Output:

enter a number:-17

square root of -17 is: 4.12311

                                                         This is easy

                                                     sinserly Natalie 7 grader (this is not that hard)