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If the amount of O2 given in question 1 reacts with your given amount of Na in question 2, which is the limiting reactant AND what is the maximum amount (in grams) of Na2O that can be produced? Why?    *You can also use this space to explain how you did question 1 and 2 for partial credit. 

Required- Explain how you did the problem above. Be sure to either show all of your math or explain each conversion step you did in words.   

Quiero que María____________ la tarea.

Which of the following mixtures would be a buffer solution? Select ALL that apply.

Convert [x]oF to K. *report your answer numerically in K, you must convert to oC before converting to K. 

Describe what you did to complete the former question if you’d like to potentially receive partial credit. 

Use the following structures to classify the following Amino Acids. 

How many moles of Al3+ would provide [x] Eq in solution? Report your answer, numerically, in moles, to 3 decimal places.

Calculate the pH of a 0.02 M solution of HCN (Ka= 6.2×10-10). Express your answer numerically to 2 decimal places, be sure to show/explain all work to be considered for part credit. 

We measure a star’s  _________________   _______________ (two words) by using the lines that appear in its spectrum; it is related to surface temperature. These basic types are designated by letters (OBAFGKM, with O for the hottest stars and M for the coolest) and are subdivided with numbers from 0 through 9.