Elements are placed in the same column of the periodic table because they share the same number of valance electrons.

a. True

b. False

A chef fills a 50 mL container with 43.5 g of cooking oil. what is the density of the oil?

When cool, dense air come over the water flows inland, it's called a?

Name 3 organisms that would be classified as eukaryotic, multicellular, and heterotrophic.

A baseball is traveling (+30m/s) and is hit by a bat, it leaves the bat traveling (-40m/s). What is the change in the velocity? Remember that direction is what makes velocity different than speed. (A. 10m/s) (B. 30m/s) (C. 40m/s) (D. 70m/s)

A hydrocarbon contains 85.7% carbon and the remainder ishydroge. Its molar mass is 70g/mol. Determine the empirical andmolecular formulas of the compound. 2NaBH4 (s) + I2 (s) - > B2H6 (g) + 2NaI (s) + H2 (g) Suppose you use 1.

A good way for someone to identify similar substances is to measure their densities true or false

At 25 ∘c, kp = 25 for the reaction h2 (g) + i2 (g) ⇌2hi (g). at equilibrium, the partial pressure of both h2 and i2 is 0.296 atm. what is the partial pressure of hi at equilibrium?

In a resonant hybrid of a molecule like CH3CO2-, how are the electron orbitals of the carbon in CO2 sp hybridized?

Consider the formation of nitrogen dioxide and oxygen: NO (g) + O3 (g) ⇌NO2 (g) + O2 (g) The reaction is first order in O3 and second order overall.

Iron has a density of 7.86 g/cm3. calculate the volume (in dl) of a piece of iron having a mass of 4.15 kg.