The proportion of dissolved substances in seawater is usually expressed in

A. parts per hundred.

B. parts per thousand.

C. parts per ten thousand.

D. parts per million.

What is the relationship between chemical equilibrium and the rates of forward and reverse reaction? a. In equilibrium, the forward reaction rate must be greater than the reverse reaction rate. b.

Which is the most accurate description of metals a. dull and brittle b. non reactive gases C. liquid at room temperature d. good conductors of electricity

Calculate the Mr of MgO

Which of the following statements best describes chemical weathering? A. It happens only in cool environments. B. It's the type of weathering in which rocks and minerals break down into smaller pieces. C.

Does ch3ch2nh2 have hydrogen bonding intermolecular forces

Which phrase is the best description of weathering? A-Compacting Rocks B-Cementing Rocks Together C-Crystallizing to form minerals D-Breaking Rocks into fragments by physical or chemical means

Calculate the acid dissociation constant of a weak monoprotic acid if a 0.5M solution of this acid gives a hydrogen-ion concentration of 0.000 1M? Show your work.

Which orbital notation represents a noble gas in the ground state

c. When we heat water up by the Bunsen burner, what temperature is the boiling water? After 10 minutes

Assuming that air contains 78 percent N2, 21 percent O2 and 1 percent Ar, all by volume. How many molecules of each type of gas are present in 1.0 L of air at STP?