High-speed streams of gas ejected from an object into space are called _________________.

REQUIRED-  How many moles of O atoms are in [x] moles of Ca(OH)2?  Express your answer numerically in moles of O. 

Sulfur (S) becomes a [blank1] with a charge of [blank2] when it [blank3] to participate in ionic bonding. 

Determine the chemical formula if the following combined to form an ionic compound- if the ions are not written- you must first determine what charges the atoms become when they become an ion- then determine the correct ratio of cation to anion- where electroneutrality will exist.   Li and Se   Be sure to use the subscript and superscript feature to correctly express the formula in the correct format. 

Stars are born in cold, relatively dense ____________________   ______________ (two words).

Which of these pieces of evidence supports the idea that inflation really happened?

True or False:  Unsubstituted (only Cs & Hs) alkanes, alkenes, and alkynes are NEVER soluble in water. 

Report the following to an appropriate number of significant figures. Remember- I am not strict about this- not the exact correct number of significant figures- just an appropriate number of significant figures.  6.3578 – [x] x 2.87 = 

Use this space to describe your work for potential partial credit.

Calculate how many grams of N2 can form when [x] grams of NH3 completely decomposes according to the following reaction:  2 NH3 (g) –> N2 (g) + 3 H2 (g)  Report your numerical answer in grams to 2 decimal places.