When performing a flame test using the method described in the manual, you complete the flame test of KNO3 and find a yellow color instead of the expected purple color. Select the potential sources of error. Group of answer choices The nichrome wire is not hot enough. The solution is not concentrated enough. The flame is not optimized. The nichrome wire is dirty. The solution is contaminated. The watch glass is dirty.

Agas in a balloon at constant pressure has a volume of 160 ml at -125*c. what is its volume at 29.0*c?

Water (2510 g ) is heated until it just begins to boil. if the water absorbs 5.09×105 j of heat in the process, what was the initial temperature of the water?

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.