When aluminum oxidizes in air, it forms aluminum oxide (Al2 O3): 4 Al(s) + 302 (g) → 2 Al2 O3 (s)
A 51 g sheet of aluminum oxide formed completely in excess oxygen.
How many grams of aluminum were oxidized?

27 g
0 51g g
54 g
102 g

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

Which formula can be used to calculate the molar mass of hydrogen peroxide