What type of macromolecule carries out catalysis in biological systems?
a) proteins called enzymes
b) carbohydrates called starches
c) lipids called steroids
d) nucleic acids called dna
e) carbohydrates called sugars

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.

Butane gas reacts with oxygen gas to give carbon dioxide gas and water vapor (gas). if you mix butane and oxygen in the correct stoichiometric ratio, and if the total pressure of the mixture is 390 mmhg, what is the pressure (in mmhg) of water vapor after the reaction is completed (temperature and volume do not change).

How many grams are in 1.75 mile of carbon