What is the chemical formula of lead(II) perchlorate? 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.

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.

What is the molarity of a solution made by dissolving 4.88 g of KCl in 423 mL of solution? 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.) 

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.) 

Potassium metal reacts violently when added to water according to the balanced equation: 2 K(s) + 2 H2O(l)  →  2 KOH(aq) + H2(g) How many moles of H2O are needed to reactcompletely with 7.54 mol of K? 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.) 

What coefficient is placed in front of O2 to complete the balancing of the following equation?   C5H8   + ? O2  → CO2   + H2O

How many carbon atoms are in 3.85 mol of carbon?

Consider the reaction, C2H4(g) + H2(g) —> C2H6(g), where ∆H= –137 kJ. How much heat is released when 3.60 mol of C2H4reacts? 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.)