Which of the following statements about enzymes is true? . a. enzymes are able to heat up molecules so that they can react.. b. enzymes always provide carbon dioxide for chemical reactions.. c. enzymes are biological catalysts which act on a substrate.. d. enzymes absorb excess heat so that reactions occur at low temperatures.

There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit

Provide a stepwise curved arrow mechanism that fully explains the outcome of the reaction shown below. oh нао* heat он

In which situation can a mixture always be called a solution