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nlexa [21]
3 years ago
6

According to the periodic table, which statement correctly describes the change from a neutral atom of an element to its ion?

Chemistry
2 answers:
Inessa [10]3 years ago
7 0
A sodium atom forms NA+1 ion by losing two electrons 
Nitella [24]3 years ago
6 0
A sodium atom forms Na1+ ion by losing two electrons
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What is an indication that a lake is healthy?
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Answer:

D

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As bioindicators are the organism that indicate or monitor the health of the environment

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A researcher wants to determine if a unicellular organism he discovered is an autotroph or a heterotroph. He radioactively label
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A

Explanation:

Autotrophs utilize the energy from  sunlight to reduce carbon dioxide to carbohydrates (glucose). The energy from the sunlight is used to split water into H+ and O2- and the H+ used in the reduction process. The labeled carbon in the carbon dioxide will, therefore, be incorporated by the autotrophs in the carbohydrates made in photosynthesis.  

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3 years ago
A compound is found to contain 38.65 % carbon, 16.25 % hydrogen, and 45.09 % nitrogen by mass. what is the empirical formula for
iren [92.7K]

The molar mass of carbon is 12, hydrogen is 1, and nitrogen is 14, hence the ratio are:

 

C = 38.65 / 12 = 3.22

H = 16.25 / 1 = 16.25

N = 45.09 / 14 = 3.22

 

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C = 3.22 / 3.22 = 1

H = 16.25 / 3.22 = 5

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So the empirical formula is:

CHN

5 0
3 years ago
Escribe aquí algo que consideres que requiere un balance para que se lleve a cabo correctamente:
Galina-37 [17]

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Direct weighing means that an object is placed directly on a balance and the mass read. Weighing directly requires that the balance be carefully zeroed (reads zero with nothing on the balance pan) in order to obtain accurate results.

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3 years ago
Scientist can use trees to look at climates of the past. How? What information can they gather and how do they gather it? Explai
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Scientist use trees a whole lot to look at climate of the past by examining tree rings.

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Climate change brainly.com/question/7824762

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