10. Cuántos gramos de dióxido de carbono se producen en una reacción de 2.50 g de hidrógenocarbonato de sodio con exceso de ácido
cítrico según la ecuación:
3NaHCO3 + H2C, H,O, Na2C6H30, + 3C02 + 3H2O?

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

The tilt of the earth's axis of rotation is responsible for the a) ocean's tides. b) size of the moon. c) brightness of stars. d) earth’s seasons.

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.