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Alina [70]
3 years ago
15

What is the process by which sand dunes occur?

Chemistry
1 answer:
Arte-miy333 [17]3 years ago
3 0
B............................................................................
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Rank the following elements by electron affinity, from most positive to most negative EA value. Rank from most positive to most
Svetlanka [38]

Answer:

Most positive = rubidium

Most negative = fluorine

Explanation:

Electron affinity of an element is the energy released when an electron is attached to a neural atom to form an ion in its gaseous state.

X + e⁻ → X⁻

Electron affinity is similar to electronegativity which is the tendency at which an atom accepts an ion towards itself.

Electron affinity increases across the period and decreases down the group in the periodic table.

In the above option,

Fluorine has the highest electron affinity

Rubidium has the lowest electron affinity

Tellurium and then finally Phosphorus

Helium in this case would have the lowest electron affinity because it has filled orbital and does not require any electron to attain stability. Technically, Helium has the lowest or is expected to have the lowest electron affinity which is close to zero according to quantum mechanics.

Most positive = rubidium

Most negative = fluorine.

You can check periodic table for their exact values

6 0
3 years ago
How many cobalt atoms are in 2 moles of cobalt?
Hunter-Best [27]

That means that one mole of cobalt weighs 58.9332 grams (58.9332 g/mol). Based on that information, to convert 2 moles of cobalt to grams, we multiply 2 moles of cobalt by 58.9332.

4 0
2 years ago
Fuels cell automobiles use__ gas as a fuel
Ray Of Light [21]

Answer:

hydrogen gas

Explanation:

Fuel cell vehicles use hydrogen gas to power an electric motor. Unlike conventional vehicles which run on gasoline or diesel, fuel cell cars and trucks combine hydrogen and oxygen to produce electricity, which runs a motor.

3 0
3 years ago
Read 2 more answers
Which of the following statements describes
kozerog [31]

Answer:

Energy is released as heat during the reaction.

5 0
3 years ago
En que epoca aprendieron a trabaja el cobre y otros metales?
g100num [7]
Maybe if you put it in english i’ll answer.. nahh jp i’m fluent
6 0
2 years ago
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