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Charra [1.4K]
3 years ago
13

How do catalysts function? A. They protect the products from external reactions. B. They increase the activation energy of an el

ementary step of a reaction. C. They lower the activation energy of an elementary step of a reaction. D. They react with the solvent and increase its reactivity.
Chemistry
1 answer:
tamaranim1 [39]3 years ago
3 0
The answer is C. They lower the activation energy of an elementary step of a reaction
This makes the reaction rate to increase since less energy is required to make a reaction occur.
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Why are most anions basic in H2O? Give formulas of four anions that are not basic.
AVprozaik [17]

Answer:

The anions that can act as bases (conjugate bases of weak acids) have the capability to hydrolyse water and produce OH− ions. Cl−, Br−NO−3, SO2−4 are all conjugate bases of strong acids that don't have the capability to hydrolyse water and so they aren't basic.

Explanation:

5 0
3 years ago
For the following reaction, 35.4 grams of zinc oxide are allowed to react with 6.96 grams of water . zinc oxide(s) + water(l) --
IRISSAK [1]

Answer:

m_{Zn(OH)_2}=38.4g

Explanation:

Hello!

In this case, for the undergoing chemical reaction:

ZnO(s)+H_2O(l)\rightarrow Zn(OH)_2

We evaluate the yielded moles of zinc hydroxide by each reactant as shown below:

n_{Zn(OH)_2}^{by ZnO}=35.4gZnO*\frac{1molZnO}{81.38gZnO}*\frac{1molZn(OH)_2}{1molZnO}  =0.435molZn(OH)_2\\\\n_{Zn(OH)_2}^{by H_2O}=6.96gH_2O*\frac{1molH_2O}{18.02gH_2O}*\frac{1molZn(OH)_2}{1molH_2O}  =0.386molZn(OH)_2

In such a way, since the water yields a smaller amount of zinc hydroxide we conclude it is the limiting reactant so the maximum mass is computed below:

m_{Zn(OH)_2}=0.386molZn(OH)_2*\frac{99.424 gZn(OH)_2}{1molZn(OH)_2} \\\\m_{Zn(OH)_2}=38.4g

Because the water limits the yielded amount of zinc hydroxide.

Best regards!

5 0
3 years ago
Which Domains would you find single cell organisms
kogti [31]
Archaea and Bacteria
8 0
3 years ago
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suter [353]
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4 0
3 years ago
Read 2 more answers
What kind of melocule is water?A:nonpolarB:ionicC:polarD:charged
hram777 [196]
The correct answer is:  [C]:  "polar" .
_____________________________________________________  
   " Water " ; which is:  " H₂O " ; 
_____________________________________________________
is a:
_____________________________________________________

  — polar;  → {eliminate:  "Choice  [A]:  "non-polar"} ;

                  → {and consider:  "Choice: [C]:  "polar" } ; 

  — covalent; → {not "ionic";  eliminate:  "Choice:  [B]:  "ionic"} ;

  — uncharged;  → {neutral compound; not "charged" —but "balanced"} ; 
 
                           →  {Note:   " H ⁺ ,  O ²⁻  ;   →   " H₂O " } ;

                           →  The "charges" balance/ cancel out. 

                           →  {eliminate:  "Choice:  [D]:  "charged" .}.
_______________________________________________________
    — 
compound.
_______________________________________________________       

The correct answer is:  [C]:
 "polar" .
_______________________________________________________
6 0
4 years ago
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