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When 45.0 g of O2 reacts with excess CH4, the actual yield of CO2 is 18.7 g.  What is the percent yield?            CH4 + 2O2 → CO2 + 2H2O   Please note: for full credit on this question you need to show your  work.

What is the coefficient on Na3PO4 when the following equation is balanced: Na3PO4    +    Mg(NO3)2       →      Mg3(PO4)2     +       NaNO3

How many grams of MgO are produced when 35.0 grams of O2 react completely with Mg?   2Mg + O2 → 2MgO Please note: for full credit on this question you need to show your  work.

You must show your work to receive credit for this problem (it doesnt matter if you answer true or false, points will be adjusted when I grade your test). Draw the table on your worksheet and fill in the blanks: Molecule or Ion (1)  NH3 (2)  H2CO  (3)  CH4 (4)  OCl2 (5)  H3O+ Number of valence electrons lewis structure molecular geometry

What is the coefficient on C3H8 (g) when the following equation is balanced: C3H8(g) + O2(g)  –>     CO2(g) +      H2O(g)

What is the coefficient on Mg(NO3)2 when the following equation is balanced: Na3PO4    +    Mg(NO3)2       →      Mg3(PO4)2     +       NaNO3

You must show your work to receive credit for this problem (it doesnt matter if you answer true or false, points will be adjusted when I grade your test). Write the balanced chemical and net ionic equation for the double displacement reaction that occurs when solutions of Magnesium chloride and Silver sulfate are mixed.  What precipitate, if any forms?

You must show your work to receive credit for this problem (it doesnt matter if you answer true or false, points will be adjusted when I grade your test).  Name or provide the formula for the following ionic compounds: Aluminum phosphate Sn2O3 FeCl3 Calcium hydroxide Copper (II) carbonate

A client with increased intracranial pressure (ICP) is prescribed mannitol. Which of the following assessments should the nurse perform to monitor for the effectiveness of the therapy?

The nurse is caring for a patient in sickle cell crisis. Which action by the nurse warrants intervention by the supervising nurse?