A sample of gas contains 0.180 mol of C2H4(g) and 0.180 mol of H2O2(g) and occupies a volume of 13.6 L. The following reaction takes place:
C2H4(g) + H2O2(g) -CH2OHCH2OH(g)
Calculate the volume of the sample after the reaction takes place assume temperature and
pressure are constant).
___ L

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.

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?