Author: Anonymous

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; }}

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

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.

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.) 

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

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.

An element X has two stable isotopes, X-203 and X-205. The isotope X-203 has a molar mass of 202.97 g/mol and a relative abundance of 29.52%. The other isotope, X-205 has a molar mass of 204.97 g/mol and a relative abundance of 70.48%. What is the average atomic mass of the element X? 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.)