In the lab,a girl has a sample of chromium nitrate. How should you she attempt to decompose this compound?

Question

A. add more chromium nitrate
B. heat it over a flame
C.dissolve the sample in water
D.None of the above, a compound can not be decomposed

Answer 1

B) it will dissolve in water and thus it is spit in ions.

if it is then followed by a electrolyse proces you have the gas NO2 and pure bare chromium

Answer 2

The new phase LaCr(NO3)6·12H2O was synthesized from a nitric acid solution. The symmetry is trigonal with the parameters a = 10.9564(4) Å and c = 16.835(1) Å [V = 1750.2(2) Å3, space group R-3]. The thermal decomposition, studied by temperature-dependent X-ray powder diffraction and thermogravimetry, gave successively the cubic phase LaCr(NO3)6·6H2O [a = 12.301(1) Å, space group P213] and the chromate(V) LaCrO4. The reduction of LaCrO4 to LaCrO3 occurred at a temperature depending on the oxygen pressure in the reaction atmosphere.

So b is your answer

Answer 3

Heating substances can often cause them to decompse, so I would say C. heat it.