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alex41 [277]
4 years ago
6

Which of these is a characteristic of science?

Chemistry
2 answers:
jenyasd209 [6]4 years ago
5 0

The correct answer is D. It gives the same result when experiments are repeated.

Explanation:

Science refers to a system or discipline that aims at understanding phenomena that is testable mainly through multiple observations, hypotheses, and testing. Because of this, characteristics of science include that it is based on facts or ideas that have been proved, it is useful for answering testable questions and also the findings are replicable which means if tested multiple times same results would be obtained which proves phenomenons and events are facts and do not depend on opinions or personal views. Considering this, the one that is a characteristic of science is that "It gives the same result when experiments are repeated".

Ivahew [28]4 years ago
3 0

D. It gives the same results when experiments are repeated

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Describe what happens to the mass number and the atomic number of a nuclide during alpha decay.
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Answer:

The answer to your question is: The mass number will be 4 units lower.

Explanation:

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When an alpha particle is released, the original atom loses 2 protons and and 2 neutrons an we can see in the example.

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Answer:

1255.4L

Explanation:

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V₁  = 569L

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T₂  = 32°C

Unknown:

V₂  = ?

Solution:

The combined gas law application to this problem can help us solve it. It is mathematically expressed as;

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where 1 and 2 are initial and final states.

Now,

 take the units to the appropriate ones;

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P₂ = 319kpa in atm gives 3.15atm

P₁  = 928kpa gives 9.16atm

T₂  = 32°C gives 273 + 32  = 305K

T₁  = 129°C gives 129 + 273  = 402K

Input the values in the equation and solve for V₂;

        \frac{9.16  x 569}{402}   = \frac{3.15 x V_{2} }{305}

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