## zhane2015 2 years ago Please Help!! The rate of a chemical reaction normally _____. (1 point) decreases as temperature increases is slowed down by a catalyst increases as reactant concentration increases decreases as reactant concentration increases

1. foxhunter98

increases as reactant concentration increases. Your in NDCDE!! LoL

2. foxhunter98

please help me in this: Use the law of conservation of mass to explain why a chemical equation must be balanced.

3. zhane2015

lol am i in what??

4. zhane2015

mkayzz hold on

5. Frostbite

Foxhunter you kinda answer your own question... if mass most be conserved you can't have that some elements are just gone...

6. foxhunter98

can you please explain it in detail. plzzzzzzzzzzzzzz i am pellet in chemestry

7. foxhunter98

i am stupid in chemestry

8. zhane2015
9. zhane2015

@foxhunter98 Then how did you answer my question??

10. Frostbite

I sure can... Lets consider we have a reaction called 2 A +9 B -> 5 C + 2 D. To say this in words: 2 moles of A react with 9 moles of B to create 5 moles of C and 2 moles of D. So for the calculations to work out we need to say (for a reaction assuming that all the reactants are converted): $\sum_{}^{}m(reactants)=\sum_{}^{}m(products+waist)$

11. zhane2015

@Frostbite can u answer my question as well?

12. zhane2015