All categories

3 years ago

Which of these changes do not involve forming or breaking chemical bonds?

2 answers:

5 0

Hi
let me help you you out

the answer is boiling ans melting

everything else can form or break chemical bonds

hope it helps

kumpel [21]3 years ago

3 0

When bonds form or break, it is called a chemical change. Which changes the substance completely and it cannot go back to the original substance.
Therefore, to answer this question correctly, we must find a physical property. Which can be a change in state and doesn't change the substance by breaking bonds or forming new bonds.
D. Boiling and melting
Explanation:
Because when you melt, you change the physical state. Also when you boil something, you are not changing the bonds. That is because you can change it back to its original substance. It is a temperature change which makes it melt or boil.
Hope I helped. :)

You might be interested in

Calculate the kinetic energy of a moving 4 kg object traveling at a velocity of 3 m/a

Alina [70]

Answer:

Explanation:KE = 18 J

7 0

3 years ago

A 40-cmcm-long tube has a 40-cmcm-long insert that can be pulled in and out. A vibrating tuning fork is held next to the tube. A

Licemer1 [7]

Answer:

1070 Hz

Explanation:

First, I should point out there might be a typo in the question or the question has inconsistent values. If the tube is 40 cm long, standing waves cannot be produced at 42.5 cm and 58.5 cm lengths. I assume the length is more than the value in the question then. Under this assumption, we proceed as below:

The insert in the tube creates a closed pipe with one end open and the other closed. For a closed pipe, the difference between successive resonances is a half wavelength $\frac{\lambda}{2}$ .

Hence, we have

$\dfrac{\lambda}{2}=58.5-42.5=16 \text{ cm}$

$\lambda=32\text{ cm}=0.32 \text{ m}$ .

The speed of a wave is the product of its wavelength and its frequency.

$v=f\lambda$

$f=\dfrac{v}{\lambda}$

$f=\dfrac{343}{0.32}=1070 \text{ Hz}$

7 0

4 years ago

A 167-? resistor and a 114-? resistor are both connected in parallel across a power supply. If the potential drop across the 167

Troyanec [42]

19-? Is the exact p.d across the 114-?resistor.
Current will different
But p.d will same in parallel circuit .

7 0

3 years ago

Help please ASAP !!!

mezya [45]

What’s the weight and how high is the clif

7 0

4 years ago

what is the acceleration of a 2,000- kilogram truck if a force of 4,200. N is used to make it start moving forward?

cupoosta [38]

Newton's 2nd law of motion: Force = (mass) x (acceleration)

Divide each side by (mass) : Acceleration = (force) / (mass)

Acceleration of the truck = (4,200 N) / (2,000 kg) = 2.1 m/s²

5 0

3 years ago