What type of shift in the light spectrum due to the expansion of the universe did Edwin Hubble discover in most galaxies?

Who preformed the oil drop experiment

How many grams of O2 are needed to react with 18.2 g of NH3?

If "solution X" has only partially dissolved in water producing a good amount of hydronium ions, and it turned the indicator or pH paper a orange/red color, what would this solution be considered and why? Explain.

An empty 4.00 l bottle has mass of 876 g. when filled with nitric acid, the total mass is 6914 g. what is the density of nitric acid in g/cm3?

Food can spoil very quickly. Which methods are used to minimize the reactions that allow bacteria and fungi to grow? preservatives and low temperature high temperature and preservatives catalysts and high temperatures low temperatures and catalysts

Which combination of protons neutrons and electrons is correct for the isotope of copper - 63?

What is the purpose of a domain?

What is the ideal gas constant? A. It is a constant that applies only at STP. B. It is a specific constant for a particular gas. C. It is a universal constant used for all gases. D. It is a constant that depends on the conditions.

The greenhouse effect is a result of the Sun's energy being absorbed by objects on the Earth and converted into which type of radiation? A) Radio B) Visible C) Infrared D) Ultraviolet

Which was the limiting reactant: the zinc or the hydrochloric acid? Remember that the limiting reactant is completely consumed in a reaction and no new product is formed unless more of the limiting reactant is added.