Catalysts affect the chemical reactions that take place within the body. what function do catalysts perform in chemical reactions?
a. catalysts slow down the rate of chemical reactions.
b. catalysts are always formed by chemical reactions.
c. catalysts are used up during a chemical reaction.
d. catalysts lower the activation energy of a chemical reaction.

Need ! asap will mark 10 pts using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. explain your answers

One nanometer is equal to how many meters?

Liquid from a brewery fermentation contains 10% ethanol and 90% water. part of the fermentation product (50,000 kg/h) is pumped to a distillation column on the factory site. under current operating conditions, a distillate of 45% ethanol and 55% water is produced from the top of the column at a rate of one-tenth that of the feed. what is the composition of the waste "bottoms" from the still?