All categories

4 years ago

During a chemical reaction, energy

Chemistry

2 answers:

Hunter-Best [27]4 years ago

8 0

Energy is converted from one format to another, usually released in the form of heat energy.

Luden [163]4 years ago

8 0

Is used up as bonds are broken and formed .

You might be interested in

Do you think it is important for archaeological sites to be protected from development once they are discovered? What are the pr

Oxana [17]

Answer: lessons and benefits can seem removed from everyday life. ... If they determine a site is significant, it is ... CRM exists because legislators and their con- ... romance of excavation and discovery of the past for ... Archaeology permits intensive study of a single culture over time, removing the myth

7 0

3 years ago

How can atoms be neutral if they contain charged particles?

rewona [7]

Stability of atoms is determined by neutron:proton ratio. This n/p ratio is 1:1 for elements below atomic number 20. Hope this helps.

4 0

3 years ago

How does a buffer resist change in ph upon addition of a strong acid?

lora16 [44]

Any buffer exists in this equilibrium

HA <=> $H^+ + A^-$
In a buffer, there is a large reservoir of both the undissociated acid (HA) and its conjugate base ( $A^-$ )

When a strong acid is added, it reacts with the large reservoir of the conjugate base ( $A^-$ ) forming a salt and water. Since this large reservoir of the conjugate base is used, the ph does not alter drastically, but instead resist the pH change.

8 0

4 years ago

How much energy does an X-ray with an 8 nm (8 x 10-9 m) wavelength have?

Vlada [557]

Answer: 2.48×10^-17 J

Explanation:

Given the following :

Wavelength = 8nm (8 x 10^-9 m)

Energy(e) of X-ray =?

Energy=[speed of light(c) × planck's constant (h)] ÷ wavelength

Speed of light = 3×10^8m/s

Planck's constant = 6.626×10^-34 Js

Wavelength = 8 x 10^-9 m

Energy = [(3×10^8) * (6.626×10^-34)] / 8 x 10^-9

Energy = [19.878×10^(8-34)] / 8 x 10^-9

Energy = 2.48475 × 10^(-26+9)

Energy = 2.48×10^-17 J

8 0

3 years ago

What is the frequency of the sinusoidal graph?

Arisa [49]

Answer:

For finding frequency, we need to first find the period of the graph.

The period of a sinusoidal graph is the time interval in which it repeats its pattern.

In the graph, we can see, after $1/period$ time, it repeats its pattern.

Hence the period of the graph is $\pi /2$ .

Now we need to find its frequency $1/\pi /2$

The formula for frequency is $2/\pi$

This is the answer

i hope you pass the assignment

try your best!

8 0

3 years ago