Please help with a through c Part a) A student adds some granular zinc to a blue solution with stirring. A dull, reddish, brown solid forms and the blue color fades. The brown/orange solid formed in the reaction is: a) Zn ions b) Cu ions c) Ag metal d) Cu metal Part b) A 2.098 g sample of chromium is reacted in air with oxygen to form 3.066 g of chromium oxide. What is the empirical formula of the solid chromium oxide formed? a) CrO b) CrO2 c) Cr2O3 d) CrO3 Part c) A student dissolves a sample of aluminum foil in a potassium hydroxide (KOH) solution with evolution of a gas. This is the first reaction step in the synthesis of alum. In the second step she treats the resulting mixture from step one with sulfuric acid to produce alum. What is the gas evolved during the first step? a) NO2 b) SO2 c) H2 d) CO2
Please help with a through c
Part a) A student adds some granular zinc to a blue solution with stirring. A dull, reddish, brown solid forms and the blue color fades. The brown/orange solid formed in the reaction is:
a) Zn ions
b) Cu ions
c) Ag metal
d) Cu metal
Part b) A 2.098 g sample of chromium is reacted in air with oxygen to form 3.066 g of chromium oxide. What is the empirical formula of the solid chromium oxide formed?
a) CrO
b) CrO2
c) Cr2O3
d) CrO3
Part c) A student dissolves a sample of aluminum foil in a potassium hydroxide (KOH) solution with evolution of a gas. This is the first reaction step in the synthesis of alum. In the second step she treats the resulting mixture from step one with sulfuric acid to produce alum. What is the gas evolved during the first step?
a) NO2
b) SO2
c) H2
d) CO2
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