An ore that contains the element aluminum is found to contain 108 grams of aluminum from an ore sample that initially weighed 229 grams, what is the mass percent of aluminum in this ore?

What is the name of the ionic compound Cr3N2?

When the equation, ___K + ___O2 → ___K2O is balanced, the coefficient of potassium is:

How many electrons would be in a -2 charged anion of sulfur?

If 2.21 grams of strontium combines with 1.79 grams of chlorine to form a chloride, calculate the percent chlorine in the compound.  

What are the coefficients for the following reaction when it is properly balanced?___CrCl3 + ___AgNO3 → ___Cr(NO3)3 + ___AgCl

What would the formula of tetraphosphorus decoxide be?

Determine the empirical formula of a compound containing 84.06% carbon and 15.94% hydrogen.

What is the formula for an ionic compound made of iron(III) and hydroxide? Hydroxide:   OH-

Woody Organization issued a five-year note on January 1, Year 1 with a face value of $100,000 and a stated interest rate of 3%, in exchange for a vehicle.  Annual payments of principal and interest are required on December 31st of each year.  What is the amount of each annual (periodic) payment?