How many lone pairs of electrons are present on the nitrogen atom in the Lewis structure of NCl3?

Find the errors in the following code snippets. public static sum(int num) { int num = 2; int i; double sum = 0; while (i < num) { sum += i; }}

What is the output of the following program? public static void main(String[] args){   int num1 = 16;   int num2 = 26;   double num3 = 1.5;   int num4 = num3 + num2 – num1;   System.out.println(num4);}

What is the output of the program? public static void main(String[] args){   int num1 = 6;   int num2 = 36;   double num3 = 10.5;   int num4 = num3 + num2 – num1;   System.out.println(num4);}

What is the chemical formula of lead(II) perchlorate? Consider the numbers in the chemical formulas as subscripts, and ionic charges as superscripts.

Which species is a diprotic acid? Consider the numbers in the chemical formulas as subscripts, and ionic charges as superscripts.

A balloon that contains 0.500 L of helium at 25°C is cooled to 11°C, at a constant pressure. What volume does the balloon now occupy? DO NOT INCLUDE THE UNIT IN YOUR ANSWER. (Neatly write your calculation on a scratch paper, show your work slowly on the webcam before you submit the test. Take a photo of your work, and submit it on Final Exam Work assignment on the module.) 

Rank the atoms Br, Cl, and K in order of increasing (low to high) electronegativity.

Which species can act as a Brønsted-Lowry acid? Consider the numbers in the chemical formulas as subscripts, and ionic charges as superscripts.

Given a positive integer n, the following rules will always create a sequence that ends with 1, called the hailstone sequence: If n is even, divide it by 2 If n is odd, multiply it by 3 and add 1 (i.e. 3n +1) Continue until n is 1 Write a function that takes an integer n as input and prints the hailstone sequence starting with the integer entered. Format the output so that ten integers, each separated by a tab character (\t), are printed per line. The output format can be achieved as follows: System.out.print(n + “\t”); Ex: If the input is: 25 the output is: 25 76 38 19 58 29 88 44 22 11 34 17 52 26 13 40 20 10 5 16 8 4 2 1 Note: you don’t need to implement a main method.