To dazzle chemistry students, Mr. Turner collected volumes of ammonia and carbon dioxide. As the two colorless gases were combined in a closed two-liter bottle with a small amount of ammonium hydroxide, the chemistry students watched in amzement
at the growth of whitish crystals inside the bottle.
Mr. Turner wrote this equation to represent the reaction in the bottle:
CO2(g) + NH3(g) + H2O(l) - NH HCO3(s)
What type of reaction occurred in the bottle?
A)
synthesis
B)
combustion
C) decomposition
D)
triple displacement

What overall charge must all compounds have

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.

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?