Which models of the atom include a structure that is mostly made of empty space?

Quantum mechanical

Thomson

Bohr

Rutherford

Which atom is the standard that scientists use to compare units of atomic mass?

which of the following reactions is titration an example of? A: Buffering. B: Neutralization. C: Exothermic. D: Endothermic.

A compound is analyzed and found to contain 36.70% potassium, 33.27% chlorine, and 30.03% oxygen. What is the empirical formula of the compound?

Find the longest wavelengths of light that can cleave the bonds in elemental nitrogen, oxygen, and fluorine. the average bond energy of n-n bond is 945 kj/mol, oxygen is 498 kj/mol, and f-f is 159 kj/mol. give your answers in scientific notation.

How many seconds are there in 23 days?

Water has a specific heat of 4184 J / (kgK) how much energy is needed to increase the temperature os a kilogram of water 5C?

A student noticed while doing the neutralization experiment that the calorimeter kept getting warmer. how would this error affect the final calculation for the δhneut of each reaction? would it be overestimated, underestimated or remain unaffected?

A solution contains 45 grams of nitrogen gas and 40 grams of argon. What is the mole fraction of argon in this solution?

How is an animal cell related to tissue and organs

Predict the precipitate produced by mixing an Al (NO3) 3 solution. write the net ionic equation for the reaction. include the states of matter