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Silicon nitride is a very hard, high-temperature-resistant ceramic used as a component of turbine blades in jet engines. Upon reaction of 38.6 g of gaseous nitrogen, N2, with excess silicon, 88.7 g of silicon nitride was obtained according to the balanced equation: 3 Si(s)+ 2 N2(g)⟶Si3N4(s)   What is the percent yield of silicon nitride?  (If you wish, show your work for possible partial credit.)

Sarah buys only CoolDay and SundayMist sodas; she can be called multibrand loyal.

An old-spice commercial used to always grab Tom’s attention; however, after seeing the commercial 20 times, Tom no longer watches the commercial. This is an example of:

In class, we discussed that advertisers are

Diane is interviewing participants to better understand her research question. Diane is collecting _____ data.

Silver ions can be precipitated from aqueous solutions by the addition of aqueous carbonate:             2  AgNO3 (aq) + Na2CO3 (aq)  →  Ag2CO3(s) + 2 NaNO3 (aq)   Silver carbonate is virtually insoluble in water so that the reaction appears to go to completion. How many grams of Na2CO3 must be added to 25.0 mL of 0.366 M AgNO3 solution to completely precipitate the silver?    (If you wish, show your work for possible partial credit.)

_____ are groups we admire and wish to be like but are not currently a member of.

Which of the following is a feature of successful new products?

All of the following are characteristics of special possessions EXCEPT

How many protons are there in an atom of uranium whose mass number is 236?