A miniature laboratory volcano can be made with ammonium dichromate. When ignited it decomposes in a fiery display.

63. A miniature laboratory volcano can be made with ammonium dichromate. When ignited it decomposes in a fiery display. (NH4)2Cr2O7(s) N2(g) +4 H2O(g) + Cr2O3(s). If 5.0g of ammonium dichromate are used and if the gases from this reaction are trapped in a 2.0 L flask at 25oC, what is the total pressure of the gas in the flask? ...continues

AP Chemistry Test Review.

(See attached file for full problem description) --- 90. Methylthallium, Ti(CH3)x, has been prepared. To find its formula (the value of x), you decompose the compound with HCl. The hydrogen of the acid combines with CH3 to produce CH4 gas. Assume you decompose 0.102g of Tl(CH3)x, and find that the isolated CH4 gas has a pres ...continues

Finding Coefficients?

When the following equation is balanced, the coefficients of BaO2 is? _BaO2-> BaO+ _O2

Finding Coefficients?

What is the coefficient of O2? _Al+_O2-> Al2O3

Chemistry

How would you prepare a liter of "carbonate buffer" at a pH of 10.10? Ka = 4.2 times ten to the negative 7(carbonic acid) Ka = 4.8 times ten to the negative 11(bicarbonate ion) It says the key to solving the problem is picking the correct Ka value. How do I know which one to work with?

Calculate the HERP value

If a carcinogen has a dose of 60.0 mg per 70 kg person and a TD50 of 40.0 mg/kg for rats, calculate the HERP value (expressed in percentage) for this carcinogen.

Balancing molecular,ionic,and net ionic equations-name the precipitate

lead II nitrate + lithium chloride = lead II chloride + lithium nitrate

Atoms to moles

How many atoms of magnesium are there in 52.65 moles of Mg3 (PO4)2?

Atom-moles

How many atoms of magnesium are there in 52.65 moles of Mg3 (PO4)2

Percent by mass

Determine the percent by mass of all the elements in the compound colbalt III acetate.