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Readme [11.4K]
3 years ago
8

Which statement concerning spontaneous chemical reactions is true?

Chemistry
1 answer:
Marina CMI [18]3 years ago
7 0
I believe the correct answer is b since a spontaneous reaction is self sufficient and should not need an ongoing out side source in order to proceed once it is started.  

a is false since some reactions that occur are relatively slow such as iron reacting with oxygen to make rust.

c is false since most reactions involve an energy change of some sort which is why we classify them as endothermic or exothermic.

d is false since catalysts help speed up reactions but do not really affect a the Gibbs free energy value which determines the spontaneity of the reaction.
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13. What is the frequency of a wave that has a wavelength of 2.73 x 10-7m?​
ella [17]

Answer:

f = 1.09 × 10¹⁵ Hz

Explanation:

Given data:

Frequency of wave = ?

Wavelength of wave = 2.73 ×10⁻⁷ m

Solution:

Formula:

Speed of light = frequency × wavelength

speed of light = 3× 10⁸ m/s

by putting values,

3× 10⁸ m/s = f × 2.73 ×10⁻⁷ m

f = 3× 10⁸ m/s  / 2.73 ×10⁻⁷ m

f = 1.09 × 10¹⁵s⁻¹

s⁻¹ = Hz

f = 1.09 × 10¹⁵ Hz

4 0
3 years ago
Reactivity occurs when a substance reacts with another substance, changing it into a ____?
MakcuM [25]

Answer:b

Explanation:

6 0
3 years ago
Write the formula unit and the net-ionic equations to describe the reaction between potassium hydrogen phthalate (khp) and cesiu
dybincka [34]
C₆H₄(COOH)(COOK) + CsOH = C₆H₄(COOCs)(COOK) + H₂O

C₆H₄(COOH)(COO)⁻ + K⁺ + Cs⁺ + OH⁻ = C₆H₄(COO)₂²⁻ + K⁺ + Cs⁺ + H₂O

C₆H₄(COOH)(COO)⁻ + OH⁻ = C₆H₄(COO)₂²⁻ + H₂O

8 0
3 years ago
Read 2 more answers
Which of the newman structures below represents this conformation of 2-methyl-3-pentanol, as viewed along the c2-c3 bond?
castortr0y [4]

Answer:

(4) option is correct

Explanation:

Given that,

The conformation of 2-methyl-3-pentanol, as viewed along the C₂-C₃ bond.

We need to find the Newman structures

Using given structures

The structure of 2- methyl-3- pentanol is shown in figure.

Through C₂-C₃ carbon shown the structure of Newman projection in figure.

Here, carbon 2 is in front side and carbon 3 is in back side in the figure.

Hence, (4) option is correct.

5 0
3 years ago
What would be the formula for diphosphorus pentoxide ?
aleksley [76]
PbCr04 + P4O10

Hope this helps!
3 0
3 years ago
Read 2 more answers
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