According to the lewis definition, a base is a (n):

a. proton donor.

b. hydroxide ion donor.

c. hydrogen ion donor.

d. electron pair donor.

e. electron pair acceptor.

The function of the eardrum in the middle ear is to

How can you make a solution saturated a. add more solvent b. add more solute c. decrease the concentration d. add more solution

Each side of a cube is 42.6mm long. what is the volume of the cube in cm cubed

The half-life of tritium, or hydrogen-3, is 12.32 years. After about 24.6 years, how much of a sample of tritium will remain unchanged?

Write the formulas for these binary molecular compounds. a. phosphorus pentachloride b. iodine heptafluoride c. chlorine trifluoride d. iodine dioxide

H2S (g) + O2 (g) - > SO2 + H2O, how many grams of O2 are needed to make 25.0 g of SO2 (Hint: balance the equation first) a.) 12.5g b.) 18.7g c.) 32.0g d.) can't be determined

With the exception of our sun, most stars are huge, bright balls of gas located trillions of miles away from earth true or false

Which geologic time span covers the majority of Earth's history?

as the flames heat the gases in the balloon the volume of the gases increases at constant pressure the volume of all gases increases with increasing temperatures is this statement a scientific theory or law explain

At 1.0 atm, terell heats a sample of soild caffeine at 178c the soild converts directly into gas. what is the name of this phase change?