Based on this chemical equation KNO3 --> KNO2 + O2 Please identify the kind of chemical reaction represented
A Synthesis
B Decomposition
Single Replacement
D Double Replacement
E) Combustion
HURRY PLEASE THIS NEEDS TO BE TURNED IN BY 4:00pm

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.

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %