Which idea did john dalton include in his atomic theory? a. all atoms are the same size. b. atoms of the same element are identical. c. each atom has a dense, positive nucleus. d. atoms can gain or lose electrons to become ions.

What volume of carbon monoxide will contain 3.02x10^23 molecules?

Match the celestial bodies with their descriptions. meteorite, asteroid, meteor, comet, A) an object from space burning up as it enters the atmosphere of a planet B) a small body in space, usually composed of rock or metal C) an object from space

How do you calculate the molarity of a solution

According to one acid-base theory, NH3 acts as a base when an NH3 molecule A) accepts an H+ion B) donates an H + ion C) accepts an OH-ion D) donates an OH - ion

True or False: A physical change does not alter the identity of the substance.

A block of aluminum metal has a volume of 3.15 L and a mass of 8.51 kg. What is the density (g/mL) ?

If electrons fall back down to the 2nd energy level, what type of electromagnetic radiation is released?

Most modern forms of transportation are powered by fossil fuels. Carbon dioxide, methane, carbon monoxide, and other gases are released into the atmosphere during the production and combustion of these fuels.

What is _CaH2 (s) + _H2O (l) → _Ca (OH) 2 (s) + _H2 (g)

Find the mass of each of these substances? 2.40 mol NaOH