loriopatrick

Exam 1 Covers ch 9, 10, 20, 24 with book Chemistry A Molecular Approach

I am writing this without revision (because I'm lazy), so if something needs refining, there is an error, and/or there is a better way of explaining something, please mention it in the comments.

Chapter 9

Definitions

Electronegativity:

loriopatrick

def isbn_13_to_10 (isbn):
    count = 0
	isbn = isbn[3:12]
	for x in range(0, 9):
		count += int(isbn[x]) * (10 - x)
	z = (11 - (count % 11)) % 11
	if (z == 10):
		z = 'X'
	return isbn + str(z)

loriopatrick

import string
from math import floor, ceil

CHARS = string.ascii_lowercase # + string.ascii_uppercase + string.digits

def gen_key (num, chars=CHARS):
    """
    example with chars='ABC'
    num | return
    0   | A

loriopatrick

def is_prime (num):
   to = int(pow(num, 1/2)) + 1
   for x in range (2, to):
      if num % x == 0:
         return False
   return True

loriopatrick

import java.sql.*;
import java.util.Date;
import java.sql.Connection;
import java.util.ArrayList;

public class Database {
    public Database(String server, String port, String user, String pass, boolean connect) {
        this.server = server;
        this.port = port;
        this.user = user;