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3 years ago

When scientists create a representation of a complex process, they are

Chemistry

1 answer:

Burka [1]3 years ago

5 0

Answer:

d making models.

Explanation:

When scientists create a representation of a complex process, they are inferring that they are making models.

A model is an abstraction of the real world or a complex process. Models are very useful in developing solutions to processes that are not easily simplified.

The models allow a part of a body to be simply studied.
Through this simple abstraction, extrapolations to other parts of the system can be deduced.
This can give very useful insights into the other parts of the system.
The heterogeneity of complex processes is a huge limitation to understanding them.
A homogenous part can be modelled and used to understand the system.

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Ranjit titrates a sample 10.00 mL of Ba(OH)2 solution to the endpoint using 12.58 mL of 0.1023 M H2SO4.

julia-pushkina [17]

Answer: The concentration of $Ba(OH)_2$ comes out to be 0.129 M.

Explanation:

To calculate the concentration of base, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of acid which is $H_2SO_4$

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is $Ba(OH)_2$

We are given:

$n_1=2\\M_1=0.1023M\\V_1=12.58mL\\n_2=2\\M_2=?M\\V_2=10.00mL$

Putting values in above equation, we get:

$2\times 0.1023\times 12.58=2\times M_2\times 10.00\\\\M_2=0.129M$

Hence, the concentration of $Ba(OH)_2$ comes out to be 0.129 M.

5 0

3 years ago

Does the result of the calculation in question 3 justify your original assumption that all of the SCN^- is in the form of FeNCS^

Naddik [55]

Fe 3+ + SCN- --> FeSCN 2+

.......Fe 3+ .......SCN-.........FeSCN 2+ 
I.......0.04..........0.001.............. 
C........-x...............-x............. 
E.....0.04-x.....0.001-x...........x 

Keq = 203.4 = x / (0.04-x)(0.001-x) 
203.4 = x / (x^2 - 0.041x + 4x10^-5) 
203.4x^2 - 8.34x + 0.00094 = x 
203.4x^2 - 9.34x + 0.00094 = 0 
x = -0.0001M or 0.0458M 
so, using your Keq, there would be no SCN- or Fe 3+ left.....all would be in the form of FeSCN 2+

5 0

3 years ago

If a 10.0ml sample of unknown liquid has a mass of 7.553g what is the density of the unknown liquid

Burka [1]

The density of the unknown liquid has a mass of 7.553g is 0.7553 g/ml

<h3>What is density?</h3>

Density is the measurement of how tightly a material is packed together.

Given data:

Weight =7.553g

Volume = 10.0ml

Density = $\frac{mass}{volume}$

Density = $\frac{7.553g}{10.0ml}$

Density = 0.7553 g/ml

Hence, the density of the unknown liquid has a mass of 7.553g is 0.7553 g/ml.

Learn more about density here:

brainly.com/question/15164682

#SPJ1

6 0

2 years ago

Question 2 (2 points)

inysia [295]

Answer:

v = 46.5 m/s

Explanation:

Given data:

Mass of car = 1210 kg

Momentum of car = 56250 kg m/s

Velocity of car = ?

Solution:

Formula:

p = mv

p = momentum

m = mass

v = velocity

Now we will put values in formula:

56250 kg m/s = 1210 kg × v

v = 56250 kg m/s / 1210 kg

v = 46.5 m/s

So a car having mass of 1210 kg with momentum 56250 kg m/s having 46.5 m/s velocity.

5 0

3 years ago

<img src="https://tex.z-dn.net/?f=heya%20%5C%3A%20guys" id="TexFormula1" title="heya \: guys" alt="heya \: guys" align="absmiddl

exis [7]

The water cycle shows the continuous movement of water within the Earth and atmosphere. It is a complex system that includes many different processes. Liquid water evaporates into water vapor, condenses to form clouds, and precipitates back to earth in the form of rain and snow.

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6 0

3 years ago