Q:put in a way that a freshman in high school can understand please =)

which of the following statement apply both to enzymes and to any other catalysts: their activity is stopped by high temperature. they speed up chemical reaction. they are proteins. they are not used up during the reaction

Q:What is positive and negative catalyst in chemistry?

Negative catalysts are, on the other hand, slowing down the positive reaction rate at the same time

Q:Always speeds the reation ratedoes not affect the reation rateundergoes a chemical changedoes not become part of the chemical changealways slows the reation rate

A catalyst does not ever become part of the chemical change. As far as I know, it always speeds up the reaction, but I could be wrong on that if there is only one correct answer. For sure, it's never changed by the reaction. That is part of a catalyst's definition.

Q:okay im doing a project for my classroom about catalyst and i have to draw a picture but when i looked up on google i just saw a bunch of random stuff and a couple were metal so thats why im asking this question. :)

A catalyst is something that enables a process to take place without being part of said process itself, such as in a chemical reaction.

Q:In the chemical reaction, why can the catalyst speed up the reaction rate

Iron catalyzes nitrogen and hydrogen synthesis of ammonia, and no iron reaction occurs almost.

Q:Before and after the chemical reaction, the nature of the catalyst unchanged this statement right? Why?

Chemical properties do not change better. Some properties of the catalyst may change before and after the reaction. If the experiment proves, the state of the catalyst before and after the reaction changes, and some changes from powder to powder.

Q:When you write a chemical equation, how do you want to add "catalyst" and "?" When you do not have to write?

This is the need for your memory, write a few times, will naturally cooked

Q:Can manganese dioxide do any catalyst for chemical reactions?

the catalyst does not participate in the reaction, such as platinum - rhodium alloy network, nitrogen and hydrogen reaction to produce ammonia. Platinum-rhodium alloy network in the process of providing electrons (or similar effects, the specific is not clear, but does not react itself), before and after the reaction of platinum - rhodium alloy mesh shape has not changed.

Q:and what type of macromolecule are they made of? thanks!

Because they speed up chemical reactions by lower the amount of energy required to start the reaction (called activation energy). A catalyst is something that speeds up a reaction - which is what enymes do.

Q:What are the pharmaceutical manufacturing companies now using PT / AL_203 catalysts?

I have a friend working in Hunan, inquire, as if the piece of PT has the most advanced equipment ,,, you can hit 114 inquiries ~!