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Alisiya [41]
2 years ago
6

1.Which Statement best describes the use of a catalyst in a fuel cell?

Chemistry
2 answers:
Bingel [31]2 years ago
6 0

Answer:

D. It Increases reaction rates.

Explanation:

mixer [17]2 years ago
4 0

Answer: D. It Increases reaction rates.

Explanation:

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An electron moved from a higher energy level to a lower energy level. What most likely happened during the transition? (4 points
Alex787 [66]

Answer: The anwser is A a photon was realeased please mark brainliest

Explanation:

6 0
2 years ago
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Consider the reaction of A(g) + B(g) + C(g) => D(g) for whichthe following data were obtained:
AveGali [126]

Answer:

rate= k[A]²[B]²[C]

Explanation:

When concentration of A is increased two times ,keeping other's concentration constant , rate of reaction becomes 4 times .

So rate is proportional to [A]²

When concentration of B is increased two times , keeping other's concentration constant,rate of reaction becomes 4 times.

So rate is proportional to [B]²

When concentration of C is increased two times , keeping other's concentration constant, rate of reaction becomes 2 times.

So rate is proportional to [C]

So rate= k[A]²[B]²[C]

5 0
3 years ago
How many numbers does positive atoms have
anastassius [24]
I'm not sure I'm sorry for that but I found this http://www.chem4kids.com/files/atom_ions.html
7 0
3 years ago
Please help me please
Ludmilka [50]

Answer:

b

Explanation:

i read this once and remember,trust me!

7 0
3 years ago
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3. Given the following equation:
miskamm [114]

Answer:

4.767 grams of KCl are produced from 2.50 g of K and excess Cl2

Explanation:

The balanced equation is

2 K+ Cl2 --->2 KCI

Here the limiting agent is K. Hence, the amount of KCl will be calculated as per the mass of 2.50 gram of K

Mass of one atom/mole of potassium is 39.098 grams

Number of moles is 2.5 grams = \frac{2.5}{39.098} = 0.064

So, 2 moles of K produces 2 moles of KCL

0.064 moles of K will produces 0.064 moles of KCl

Mass of one molecule of KCl is 74.5513 g/mol

Mass of 0.064 moles of KCl is 4.767 grams

4 0
2 years ago
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