A solution has a hydrogen ion concentration of 1×10−81 \times 10^{-8} M. What is the pH and is the solution acidic or basic?

What is the total pressure of a container that contains 12.5 atm oxygen gas, 14.5 atm nitrogen gas and 18.5 atm argon gas? 

If the molarity on an NaOH solution is 3.50 M and you have a volume of 225 mL, calculate the grams of the solute.

An 8.5 L tire is filled with 0.55 mol of gas at a temperature of 305 K. What is the pressure (in atm) of the gas in the tire?

Given the chemical equation: 2 Ca(s) + O2(g) -> 2 CaO(s) If 2 moles of CaO are formed in this reaction, then 2 moles of O2 must have reacted.

How many moles of solid aluminum are needed to make 9 moles of hydrogen gas? Given the reaction: 2Al(s) + 6HCl(aq) -> 2AlCl3(s) + 3H2(g)

The Arrhenius definition of a base is:

How many grams of chlorine gas are needed to make 117 grams of solid sodium chloride? Given the reaction: 2Na(s) + Cl2(g) -> 2NaCl(s)

What is the correct Lewis structure for N2 ?

Download the exam here: PHYS_103_summer_2025_Exam 1.pdf Download the equation sheet here: Equation Sheet You have 60 minutes to complete the exam, please time yourself accordingly. Once you finish the exam, up to 15 minutes can be used to scan and submit your work to the corresponding D2L Assignment.  The exam will consist of 4 open-ended problems, making a total of 110 pts. A calculator is permitted. You are not allowed to access any resources other than the equation sheet during the test. Show all your work to receive full credit on problems. In some cases, this includes drawing a diagram of the problem. Email tsaadi@arizona.edu or leebe@arizona.edu if you have questions at any time.