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3 years ago

ILL GIVE BRAINLIST!!!!!!

Chemistry

2 answers:

attashe74 [19]3 years ago

7 0

Answer:

the investigation and results are more reliable if the results can be reproduced.

Explanation:

As you may already know, a scientific experiment is a set of procedures performed by a scientist who seeks to find answers to a particular phenomenon or situation. Every experiment, therefore, generates a result that seeks to explain a certain thing.

It is common and even recommended that scientists reproduce each other's experiments. This is because if, for example, an experiment done by me results in the same conclusions as an experiment done by you a few years ago, it means that the results of our experiments are credible and that they can be considered as correct and true.

fomenos3 years ago

3 0

hope this helpssss :)

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3. At a pressure of 405 kPa, the volume of a gas is 6.00 cm

monitta

The pressure gets increased to 486 kPa from 405 kPa, when the volume is decreased from 6 cm³ to 4 cm³.

Explanation:

In the present problem, the temperature is said to remain at constant and there is change in the pressure. So according to Boyle's law, the relationship between pressure and volume of any gaseous objects are inversely related to each other. In other words, the pressure attained by gas molecules in a container will be inversely proportional to the volume of the gas molecules occupied in the container, at constant temperature.

$V=\frac{1}{P}$

So, if two volumes V₁ and V₂ are considered, then their respective pressure will be represented as P₁ and P₂. Then, as per Boyle's law,

$V_{1}P_{1}=V_{2}P_{2}$

So let us consider, V₁ = 6 cm³ and V₂ = 4 cm³ and pressure P₁ = 405 kPa and we have to determine P₂.

Then, $6*405=5*P_{2}\\ \\P_{2}=\frac{2430}{5} =486 kPa$

So, the pressure at new volume of 4 cm³ is 486 kPa. It can be seen that as there is decrease in the volume, there is an increase in the pressure. So it satisfied the Boyle's law.

Thus, the pressure gets increased to 486 kPa from 405 kPa, when the volume is decreased from 6 cm³ to 4 cm³.

6 0

2 years ago

Devise a way to separate a mixture of sand, salt, and iron filings. Write the procedure using a step-by-step method and explain

aev [14]

1. Iron fillings are magnetic, so use a magnet to pull the iron fillings out of the mix.
2. Then you can put the salt and sand mixture into water, since salt is soluble, and the salt will dissolve, leaving you with sand.

3 0

2 years ago

We get 1700 Tonnes of Ammonia every day. How many tonnes of 63% Nitric acid we can get?

jeyben [28]

There are 3 equations involved in manufacturing Nitric Acid from Ammonia.

First the ammonia is oxidized:
4NH3 + 5O2 = 4NO + 6H2O

Then for the absorption of the nitrogen oxides.
2NO + O2 = N2O4

Lastly, the N2O4 is further oxidized into Nitric acid.
3N2O4 + 2H2O = 4HNO3 + 2NO

Then run stoichiometry through these equations.
The first equation produces roughly 271,722,938 grams of NO
The second equation produces roughly 416,606,944 grams of N2O4
The last equation produces roughly 380,412,294 grams of HNO3 (nitric acid)

Convert the exact number back into tons, and your answer is: <span>419.332775 tons.
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Rounded, I'm going to say that's 419.33 tons.
Hope this helps! :)

Also, it seems that commercially, Nitric Acid is commonly made by bubbling NO2 into water, rather than using ammonia.

8 0

3 years ago

When balancing a chemical equation, the number of h atoms in 2 ch4 is eight?

Viktor [21]

Yes... that is correct.

CH4 is methane so the coefficent in front of it would double the number of atoms of each element

6 0

3 years ago

Read the scientific question below.

svetlana [45]

If we fertilize a plant, then its height increases fast. Always use if then format

8 0

2 years ago