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Ganezh [65]
3 years ago
14

Help!!!!! Which of the following is a characteristic of reliable scientific study

Chemistry
2 answers:
Angelina_Jolie [31]3 years ago
8 0
?? There no picture given.
dybincka [34]3 years ago
7 0

Answer:

A reliable scientific study<u><em> is supported by empirical evidence.</em></u>

Explanation:

Science is the set of knowledge that is organized systematically obtained from observation, experimentation and reasoning within specific areas. In other words, science is empirical knowledge of the universe that is established according to the principles of the scientific method. The scientific method will vary according to the type of field of study, but you can define how the process by which a theory can be demonstrated or refuted. The scientific method is then defined as a set of ordered steps that are used to acquire new knowledge. In order to be qualified as a scientist, it must be based on empiricism, on measurement and, in addition, must be subject to reason. It is characterized by reproducibility, that is, the ability to repeat a given experiment, anywhere and by anyone. Another characteristic of the scientific method is refutability, that is, that every scientific proposition has to be susceptible to being falsified or refuted. This implies that experiments could be designed, which, in the case of giving different results to those predicted, would deny the hypothesis tested.

Then, as a reliable scientific study and science is based on the scientific method, which in turn is supported by experimental evidence, it is possible to say that<u><em> a reliable scientific study is supported by empirical evidence.</em></u>

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A combustion analysis of 5.214 g of a compound yields 5.34 g co 2 ​ , 1.09 g h 2 ​ o, and 1.70 g n 2 ​ . if the molar mass of th
nekit [7.7K]
Answer is: C₃H₃N₃O₃.
Chemical reaction: CₓHₓNₓOₓ + O₂ → aCO₂ + x/2H₂ + x/2N₂.
m(CₐHₓNₓ) = 5,214 g.
m(CO₂) = 5,34 g.
m(H₂) = 1,09 g.
m(N₂) = 1,70 g.
n(CO₂) = n(C) =  5,34 g ÷ 44 g/mol = 0,121 mol.
n(H₂O) = 1,09 g ÷18 g/mol = 0,06 mol.
n(H) = 2 · 0,0605 mol = 0,121 mol.
n(N₂) = 1,7 g ÷ 28 g/mol = 0,0607 mol.
n(N) = 0,0607 mol · 2 = 0,121 mol.
n(C) : n(H) : n(N) = 0,121 mol : 0,121 mol : 0,121 mol /: 0,121
n(C) : n(H) : n(N) = 1 : 1 : 1.
M(CHN) = 27 g/mol.
m(O₂) = 8,13 g - 5,214 g = 2,914 g.
n(O₂) = 2,914 g ÷ 32 g/mol = 0,09 mol.
n(CₓHₓNₓOₓ) = 5,214 g ÷ 129,1 g/mol = 0,0404 mol.
n(CₓHₓNₓOₓ) : n(CO₂) = 1 : 3.


3 0
3 years ago
Read 2 more answers
If some of the gas bubbles from the reaction had escaped out the bottom of the tube, how would this have affected your value for
Andrej [43]

The composition would be more "diluted" in a sense.

7 0
3 years ago
A protein is a polymer that is made of a. simple sugars. c. amino acids. b. nitrogen and carbon dioxide. d. DNA.
MA_775_DIABLO [31]
Hello Lilsavage717, I believe the answer you are looking for is C. or Amino Acids. They are mainly located in living things like plants or bugs. 
7 0
3 years ago
Read 2 more answers
How many moles of xenon gas, Xe, would occopy 37.8L at stp
Charra [1.4K]

Answer:

The number of moles of  xenon are 1.69 mol.

Explanation:

Given data:

Number of moles of xenon = ?

Volume of gas = 37.8 L

Temperature = 273 K

Pressure = 1 atm

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

Now we will put the values in formula.

1 atm × 37.8 L = n ×  0.0821 atm.L/ mol.K   ×273 K

37.8 atm.L =  n × 22.413 atm.L/ mol.

n = 37.8 atm.L /  22.413 atm.L/ mol.

n = 1.69 mol

The number of moles of  xenon are 1.69.

8 0
3 years ago
What does changing densities cause to occur
Dafna1 [17]

Answer:

Explanation:

Please Elaborate

8 0
3 years ago
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