If an atom of lithium has a mass number of 9, what is the number of neutrons?

An atom has 10 protons, ten neurons and ten electrons. What is the mass of that atom in u unit?

Consider a 1.0-l flask containing neon gas and a 1.5 l flash containing xenon gas. both gases are at the same pressure and temperature. according to avogadro's law, what be said about the ratio of the number of atoms in the two flasks?

AP Chemistry How many grams of oxygen are in 28.2 g of H2SO4?

Which chemical, originally produced from the ashes of plants, is essential for making soap

Chlorine gas can be prepared in the laboratory by the reaction of hydrochloric acid with manganese (IV) oxide. 4HCl (aq) + MnO2 (s) ⟶MnCl2 (aq) + 2H2O (l) + Cl2 (g) A sample of 37.7 g MnO2 is added to a solution containing 46.3 g HCl.

A catalyst can only be used once. True False

On what basis do we distinguish between substances and separate them from one another?

What is the net ionic equation for the following reaction? H2CrO4 + Ba (OH) 2

How does improving food-storage facilities make farming more sustainable? A. It decreases the amount of water needed. B. It keeps food from rotting as quickly and being wasted. C. It decreases the amount of land needed. D.

Which of the following shows the correct net ionic equation for the reaction between HCl and NH3?