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myrzilka [38]
3 years ago
13

Why is 1g of cobalt oxide nanoparticles a better catalyst than 1g of cobalt oxide powder?

Chemistry
1 answer:
jeka943 years ago
3 0

Answer;

It is because nano particles have a large surface area compared to the powder.

Explanation;

-The rate of a chemical reaction can be raised by increasing the surface area of a solid reactant. This is done by cutting the substance into small pieces, or by grinding it into a powder.

-If the surface area of a reactant is increased, it means more particles are exposed to the other reactant.

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Which of the following 0.820 M solutions would have the greatest colligative effect?
eimsori [14]

Answer:

K3PO4

Explanation:

Recall that colligative properties depends on the number of particles present. The greater the number of particles present, the greater the degree of colligative properties of the solution. Let us look at each option individually;

SrCr2O7-------> Sr^2+ + Cr2O7^2- ( 2 particles)

C4H11N (not ionic in nature hence it can not dissociate into ions)

K3PO4-------> 3K^+ + PO4^3- (4 particles)

Rb2CO3-------> 2Rb^+ + CO3^2- (3 particles)

Hence K3PO4 has the greatest number of particles and will display the greatest colligative effect.

8 0
2 years ago
How many moles of h2o are produced when using 7 moles of h2
Olenka [21]
1) Write the balaced chemical equation:

H2 + 2O2 → 2H2O

2) Infere the molar ratios:

1 mol H2 : 2 mol of water

3) Make the calculus as the direct proportion relation:

[2 mol H2O] / [1 mol H2] * 7 mol H2 = 14 mol H2

As you see you produce the double number of moles of H2O than number of moles of H2 used.

Answer: 14 moles 

6 0
3 years ago
Which type of drug commonly marketed to consumers does not require a prescription?
Nimfa-mama [501]
C. pain reliever
ex. tylenol, aleve, etc.
7 0
2 years ago
Place each phases of the moon in the correct order, starting with the new moon
9966 [12]
New moon, crescent moon, first quarter moon, gibbous moon, full moon.
Hope this Helps! :)
8 0
2 years ago
which of the following halides reacts more slowly in an SN1 reaction: 5-chloro-1,3-cyclopentadiene or 7-chloro-1,3,5-cycloheptat
Rudiy27

Answer:

5-chloro-1,3-cyclopentadiene

Explanation:

5-chloro-1,3-cyclopentadiene will react more slowly in an SN1 reaction. ( i.e. No reaction as the product is unstable ) attached is the representation of the rate of reaction of both Halides which shows that 5-chloro-1,3-cyclopentadiene reacts the slowest .

Also During SN1 reaction Carbocation is formed .

Attached below is the solution explanation

8 0
2 years ago
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