8. A sample of sulfur has a mass of 223 g. How many moles of sulfur are in the sample?

What would be the change in pressure in a sealed 10.0 l vessel due to the formation of n2 gas when the ammonium nitrite in 1.20 l of 0.500 m nh4no2 decomposes at 25.0°c?

In which of the following sets is the symbol of the element, the number of protons, and the number of electrons given correctly? F, 19 protons, 19 electrons Cs, 55 protons, 132.9 electrons Zn, 30 protons, 60 electrons In, 49 protons, 49 electrons

Carbon dioxide can change directly from the solid phase to the gaseous phase. true or false

Does filtering separate a solution into it's components? explain

What must be balanced on the left side of an equation with the atoms on the right side of the equation? total number of molecules total number of atoms total number of compounds free electrons

Determine the number of moles 1) 20g Na and 2) 34g H2O

Nitrogen dioxide (NO2) gas and liquid water (H2O) react to form aqueous nitric acid (HNO3) and nitrogen monoxide (NO) gas. Suppose you have 5.0 mol of NO2 and 11.0 mol of H2O in a reactor. Suppose as much as possible of the NO2 reacts.

How long does it take the Earth to rotation and revive

What is Charles' law formula?

Which stars have the highest absolute brightness? Select one: a. Supergiants b. Giants c. Yellow stars d. Dwarfs