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antoniya [11.8K]
3 years ago
11

A student is reading about a scientific claim in a newspaper article. The article include

Chemistry
1 answer:
LekaFEV [45]3 years ago
6 0

Answer:

Who will benefit from the claim?

Where did the data come from?

What is the reputation of the data source?

Was the data obtained through multiple experiments?

Explanation:

In order to validate a scientific claim, it is important to follow several steps:

  • inquire who will benefit from the claim: sometimes specific claims are made in order for third parties to make profits or advertise themselves rather than provide objective research and present it to the public; besides, specific research companies might be financed by the individuals who are interested in specific outcomes of an experiment that would be favorable for them;
  • find out where the data came from: data is the most important material in validating the claim, as it's gathered in an experiment and final conclusions are made of it. It's important to make sure that the data gathered is objective and not fabricated;
  • verify the reputation of the data source: this is extremely relevant as well. Some data sources are simply not approved for scientific research standards (think of, say, the reason why we cannot cite Wikipedia in our papers);
  • make sure that multiple experiments were carried out: significant errors are usually avoided when several experiments are performed. A single experiment leaves a big room for an error.

However, we shouldn't judge the validity of a claim based on our personal bond with it, as it's subjective. Regardless of how we feel about the claim, that doesn't influence its validity.

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Only the number of neutrons change.

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When molecules have the same number of each element but those atoms are arranged differently they are known as____________.
Karo-lina-s [1.5K]

Answer: Structural Isomers

Explanation:

The compounds having similar molecular formula but different arrangement of atoms or groups in space are called isomers and the phenomenon is called as isomerism.  

Isomers are of two types: structural isomers and stereo isomers.

Structural isomers are isomers in which molecules with the same molecular formula have different bonding patterns.

Stereoisomers are isomers in which molecules have the same molecular formula and sequence of bonded atoms but differ in the three-dimensional orientations of their atoms in space.

Thus when molecules have the same number of each element but those atoms are arranged differently they are known as Structural isomers.

5 0
2 years ago
Match the element with number of valence electrons
Alla [95]

Answer:

Oxygen-O = 6

Carbon C = 4

Gallium G = 3

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Arsenic As = 5

Potassium K = 1

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Explanation:

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2 years ago
Which is denser 10g of shampoo or 10kg of the same shampoo? Please explain! Thanks!
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7 0
2 years ago
Read 2 more answers
Britney added 0.05 moles of copper(II) nitrate solution to 0.1 moles of sodium hydroxide solution and
Rama09 [41]

The percent yield of copper hydroxide is 84%

<h3>Stoichiometry</h3>

From the question, we are to determine the percent yield of copper hydroxide

First, we will determine the theoretical mass

From the given balanced chemical equation, we have

Cu(NO₃)₂ + 2NaOH -- Cu(OH)₂ + 2NaNO₃

This means,

1 mole of copper(II) nitrate reacts with 2 moles of sodium hydroxide to produce 1 mole of copper hydroxide

Therefore,
0.05 mole of copper(II) nitrate reacts with 0.1 mole of sodium hydroxide to produce 0.05 mole of copper hydroxide

The theoretical number of moles of copper hydroxide that is produced is 0.05 mole

Now, for the theoretical mass

Using the formula,

Mass = Number of moles × Molar mass

Molar mass of copper hydroxide = 97.56 g/mol

Then,

Theoretical mass = 0.05 × 97.56

Theoretical mass of copper of hydroxide produced is = 4.878 g

Now, for the percent yield of copper hydroxide

Percent yield is given by the formula,

Percent\ yield = \frac{Actual\ yield}{Theoretical\ yield} \times 100\%

Then,

Percent\ yield\ of\ copper\ hydroxide= \frac{4.1}{4.878}\times 100\%

Percent\ yield\ of\ copper\ hydroxide= 84\%

Hence, the percent yield of copper hydroxide is 84%.

Learn more on Stoichiometry here: brainly.com/question/9372758

7 0
2 years ago
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