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3 years ago

How could a chemical change create sound

Chemistry

1 answer:

NeX [460]3 years ago

5 0

Release of heat, color change, or produce of bubbles create are chemical changes that create sound.

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Simulated Vinegar One way to make vinegar (not the preferred way) is to prepare a solution of acetic acid, the sole acid compone

forsale [732]

Answer:

Explanation:

Well, to make it simple, you want to make a solution of acetic acid with pH of 3 using pure acetic acid. We have the dissociation K which makes the life easier:

CH3COOH <--> CH3COO- + H+

k= [CH3COO-]*[H+]/[CH3COOH]

In the target solution [H+]=[CH3COO-]=10^-3. (Based upon pH=-log[H+])

So, all we have to know is how many starting mols of acetic acid (x) can end up with this concentration of H+.

At equilibrium and using the K you've mentioned we can write:

(10^-3)*(10^-3)/(X-10^-3)=1.74*10^-5

(Remeber that if we have a 10^-3 mol concentration of [H+], it means that 10^-3 mol of our starting acid has already dissociated to make it, hence that X-10^-3 instead of a sole X)

If we solve the above equation, we will see that X (the strarting concentration of acetic acid) is about 0.058 mol/lit. Now life gets even easier:

If a mol of acid acetic weights 60 gr, then 0.058 mols should weight... let me see... yes, 3.48 gr... And now, we have the weight, and all we need to calculate the volume, is the density (density=weight/volume), and fortunately, we have that piece of information as well... With a density of 1.049 g/ml, to have 3.49 gr of acid at hand we need to take 3.317 ml of acetic acid which can be rounded to 3.32 ml which you mentioned as the answer!

All that is left to find is that "appropriate flavouring agent" which in my opinion will eventually pose the main problem! (An ester will probably do it...)

6 0

4 years ago

Helpppp plese need to be done

zalisa [80]

Work as the rest are forms of electricity

3 0

3 years ago

To lift a load of 100 N a distance of 1 m an effort of 25 N must be applied over an inclined plane of length 4 m. What must be d

Rama09 [41]

Answer: The correct answer is A) Use an inclined plane of 8 m

Work :

Work is defined as force applied to an object to move it to some distance . It is calculated as product of force and displacement .

W = F* d

Where : W =work (N-m) F = force (N) d = displacement (m)

When a body is lifted , work can be expressed as :

W = m*g*h ( h = height )

Also force due to gravitation can be given as

F = m* g

where :

g = gravitational acceleration ( $9.8 \frac{m}{s^2}$

Hence Work can be written as : W = F * h

Given :

Force on load due to gravitation = 100 N Height = 2 m

Force applied = 25 N displacement = ?

Work done to lift the load to 2 m = F * h

= 100 N * 2 m = 200 N-m

Plugging W = 200 N-m in work formula

W = F* d

200 N-m = 25 N * d

Dividing both side by 25 N

$\frac{200N-m}{25 N} = \frac{25 N * d}{25 N}$

d = 8 m

Hence, to lift the load using 25 N , the inclined plane of 8 m can be used .

5 0

4 years ago

Read 2 more answers

How Difficult or easy to obtain geothermal

Alenkasestr [34]

It is more difficult over easy. Since you haven't figured it out and came here to ask.

6 0

3 years ago

1-Witch compound is composed of the most atoms?

PilotLPTM [1.2K]

Answer:

good luck with these problems I've never seen anything like it

6 0

3 years ago