¿Qué sustancia provoca la muerte accidental en el uso de calefón que se encuentran en el interior de un baño o en el uso de las estufas a gas (mezcla de butano y propano)?

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.

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

You have a liquid that exhibits diltancy. you want to pour it from a bottle. what should you do to the bottle before pouring