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Leona [35]
3 years ago
8

En que año fue creado la probeta​

Chemistry
1 answer:
Artemon [7]3 years ago
3 0
Wrong subject sorry can’t help
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Which of the following sequences of elements would all have four valence electrons?
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Terry heats two different masses of substance A to different temperatures, and measures the amounts of both carbon dioxide and w
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This experiment is uncontrolled because two different masses of substance A are used.

Explanation:

A controlled experiment is a structured experiment aimed at testing a particular observation or observations. The setup of a controlled experiment helps to determine the reason why a particular observation occurs and what must have led to it.

In the experiment highlighted above, different masses of a substance were used, they were heated to different temperatures. The set up does not show any correlation between the masses of substances heated and the temperatures. It is even difficult to try to predict the hypothesis for this kind of experimental set up. All the variables in play can best be assumed to be independent of one another.

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#1.Which of the following best identifies base 1? A) purine. B) pyrimidine. C) cytosine. D) nucleotide. #2. Which of the followi
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Here are the list of nucleo bases : adenine , Thymine, Guanine , Cytosine

Adenine pairs with Thymine, and Guanine pairs with Cytosine

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So the answer for number 1 will be : Purine, since Adenine is not the choice

And the answer for number 2 is Guanine

hope this helps

 


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3 years ago
How many moles of tungsten (W,183.85 g/mol) are in 415 grams of tungsten?
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