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Natalka [10]
3 years ago
13

Melvin is exploring the different kinds of changes that can happen to substances. After reading about the kinds of changes that

occur, he saw some rust on a pipe that was going into his house. What kind of change is the formation of rust?
A.reactant
B.physical
C.chemical
Chemistry
2 answers:
Vlada [557]3 years ago
6 0
I think it’s c because when ever it rains it make medal rust
Alexxandr [17]3 years ago
4 0

Answer:

It is B. physical.

Explanation:

The rust on the pipe is something causes by something, which mean it is physical. Hope this helped you out!!

Have a wonderful day! :D

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The. bond dissociation enthalpies of the H-H bond and the H-Cl bond are 435 kJ mol^-1 and 431 kJ mol^-1, respectively. The ΔHfO
Novay_Z [31]

The bond dissociation energy of the Cl - Cl bond is -958 kJ mol^-1.

<h3>What is the dissociation enthalpy?</h3>

Given that;

H-H bond energy =  435 kJ mol^-1

H-Cl bond energy = 431 kJ mol^-1

ΔHfO of HCL(g) = -92kJ mol^-1

Bond dissociation enthalpy of the Cl-Cl bond = x

-92 = 435  +  431 + x

x = -92 - (435  +  431)

x = -958 kJ mol^-1

Learn More about dissociation enthalpy:brainly.com/question/9998007?

#SPJ1

6 0
2 years ago
The iupac name of this ??
Licemer1 [7]
Methylhexanamine<span> and its formula is C7H17N</span>
that thing is a drug
3 0
3 years ago
A chemistry student’s height is measured at 68.5 inches. How tall is the student in cm?
pantera1 [17]
173.99cm multiply 68.5 x 2.54 always use that number when converting inches to cm
4 0
3 years ago
1. a.) Calculate the wavelength of light which has a frequency of 5.25 x 10 14 Hz.
Scilla [17]
<h3>Answer:</h3>

5.71 × 10² nm

<h3>Explanation:</h3>

The product of wavelength and frequency of a wave gives the speed of the wave.

Therefore;

Velocity of wave = Wavelength × Frequency

c = f ×λ

In our case;

Frequency = 5.25 × 10^14 Hz

Speed of light = 2.998 × 10^8m/s

But;

λ = c ÷ f

  = 2.998 × 10^8m/s ÷  5.25 × 10^14 Hz

  = 5.71 × 10^-7 m

But; 1 M = 10^9 nm

Therefore;

wavelength = 5.71 × 10^-7 × 10^9

                  = 5.71 × 10² nm

The wavelength of light wave 5.71 × 10² nm

3 0
3 years ago
How many moles are in 525 g of ammonia, NH3?<br> 8940.75 M<br> 0.03 M<br> 30.83 M
victus00 [196]

Answer:

30.83 M

Explanation:

17.03052 re in one mole. So, if you multiply it by 30.83, you will get 535 g of ammonia.

In fact, the detailed answer is 30.827009392549122.

3 0
2 years ago
Read 2 more answers
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