Copper was mixed with nitric acid (HNO3). Fizzing and bubbling occurred along with a color change from colorless to blue. The gaseous product was collected in a test tube and exposed to a glowing splint.  A loud pop was heard.  (WCSU24) Identify the gas produced and indicate what observation would correspond to a different gas by making the following matches.

(WCSU24) Define the following terms in just a few words: a.  Pressure – b.  Catalyst – c.  Enthalpy- d.  Limiting reactant – e.  Mobile phase –

(WCSU24) Edit the abstract below by selecting the sentences that should be kept in the final draft. Single replacement reactions occur when a single element reacts and takes the place of another element in a compound. I learned about stoichiometry when I did this experiment.  Herein, the synthesis of copper from aluminum and copper(II) sulfate is described. 5.0 g of aluminum were added to 50 mL of copper(II) sulfate.  Once the chemical reaction was balanced, I was able to determine the amount of moles of each reactant used when undergoing the reaction to produce copper. The mass of copper isolated was 2.0 g giving a yield of 48%. This lab was super fun!  

7.  A chromatography experiment was used to determine components in a mixture. a.  Calculate the Rf values for spot A and spot B using your ruler. Show your work. Use appropriate significant figures in your measurements and calculations.  (6 points, WCSU24.[x])    b. The stationary phase for the previous chromatogram was cellulose, which is highly polar due to the presence of multiple hydroxyl (OH) groups.  The mobile phase was water.  Given this, identify which amino acid (a building block for proteins) shown below corresponds to A and B.  Explain your reasoning. (6 points)   Enter the Rf value of spot A in the box below.

How many times will the print function be called during the function call draw_chessboard(1, 1, ‘K’, 3) ? (Check carefully all print statements)

What function call should we use to get this chessboard output where ‘P’ is the last character printed (except for special characters).  There are 8 rows and each row contains 8 characters. # # # # # # # ## # # # # # # ## # # # # # # ## # # #  # # # P

In Python, what will type(get_budget(get_id(“Parks”),2024)) evaluate to?

You are given the following function: def my_func(x,y):   if y == 0 or x == 0:      return “division by zero not allowed”   elif x < y:     return y / x    else:     return x / y What will be the return value of my_func(2,1)?

What values are printed:   i = 0while i < 10:    i = i + 1    if i % 2 != 0:        continue    print(i)  

What function call will create the following chessboard when ‘Q’ is the first character printed? There are 4 rows printed and each row contains 4 characters.  Q # # ## #  # #