The first mechanistic step in the direct reaction of an amine with a carboxylic acid to produce an amide is:

Is viscosity a physical or chemical change?

Which statement is true about the cells of non-living objects? A. They have prokaryotic cells. B. They have eukaryotic cells. C. They have a mixture of prokaryotic and eukaryotic cells. D. They do not have cells

A certain recipe requires 3/2 cups of sugar an makes 2 dozen cookies. (1 dozen = 12). quantity a = the amount of sugar required for the same recipe to make 30 cookies. quanity B = 2 cups

A sample of gas occupying 350 mL at 25 C is cooled to - 25 C. What volume will it occupy if the pressure is held constant?

What is the name of this molecule? CH (Triple Bond) C-CH2-CH3

Sodium hypochlorite (Na xCl yO z) is the active ingredient in household bleach. A 250.0 g sample of sodium hypochlorite contains 77.2 g sodium, 119.1 g chlorine, and the remainder is oxygen. Calculate the empirical formula of sodium hypochlorite.

The tapeats sandstone in the grand canyon is an example of a clastic sedimentary rock. such clastic sedimentary rocks can be distinguished from biochemical sedimentary rocks by

An ice cube and a scoop of table salt are left outside on a warm, sunny day. Explain why the ice cube melts and the salt does not

Which atomic orbitals overlap to form the C-O bond of dimethyl ether, (CH3) 20? O c 2sp^3 + 2sp^3 OC 2sp^2 + 0 2p O c 2sp^2 + 0 25p^2 O C 2sp^3 + O 2sp?

For the reaction CO+2H2=CH3OH at 700 K, equilibrium concentrations are [H2]=0.072 M, [CO] = 0.020M, and [CH3OH] = 0.030 M. Calculate K