In a lab, 20.0 g of ammonia (NH3) are reacted with 20.0 g of hydrogen chloride (HCl) to produce solid ammonium chloride.
NH3(g) + HCl(g) + NH4Cl(s)
What mass of ammonium chloride is produced?

Which of the following mining methods disrupts the sea floor?

What is the percentage composition of carbon in the compound ch4

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.