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Bond [772]
3 years ago
8

Endothermic/exothermic

Chemistry
1 answer:
Yuki888 [10]3 years ago
6 0
Endothermic is when the compound absorbs energy in the reaction. Exothermic is the opposite: the compound releases energy in the reaction.
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How many electrons are transferred between the cation and anion to form the ionic bond in one formula unit of each compound? (1
rosijanka [135]
Here are the solutions:
For NaCl, there would be one electron transferred from the sodium atom, now producing a cation to the chlorine atom resulting in a chlorine anion. Forming ionic bond.
For CaS, there would be 2 electrons transferred from an atom of Ca to S, this can be obtained by simply looking at the ionic charges and or combining capacities of Ca.
For BaO, likewise, 2 electrons that are valence electrons are transferred from Ba to Oxygen.
In the ionic compound of KBr, the atom of K, potassium donated its one valence electron to Br, in need of it to achieve a stable octet, and produce the chemical bond.
Finally, LiF, a single valence electron is transferred from a metal atom of Li to F, for both of the atoms that would form the ionic bond to achieve a stable octet, and or full electron shell.
3 0
3 years ago
What is an effect of gravity on objects on the surface of Earth? Check all that apply.
Flauer [41]

Answer: The correct statements are:

  • Objects “fall” toward the center of Earth.
  • Objects accelerate at a rate of 9.8 m/s each second.
  • Objects are pulled by Earth more strongly than they pull on Earth.

Explanation:

The gravity of the earth is the force which attracts the object to the center of the earth. When the any object with mass falls under the action of the gravity attains the acceleration of 9.8 m/s^2.

  • Objects “fall” toward the center of Earth.
  • Objects accelerate at a rate of 9.8 m/s each second.
  • Objects are pulled by Earth more strongly than they pull on Earth.
9 0
3 years ago
Read 2 more answers
El plomo y el yodo forman dos compuestos. En uno, el porcentaje de en masa de plomo es del 44,94% y en el otro es de 62,02%. Cal
nikdorinn [45]

Answer:

0.8162 gramos de plomo por gramo de yodo

1.633 gramos de plomo por gramo de yodo

Explanation:

Asumiendo una base de 100 gramos para cada compuesto:

Primer compuesto:

Gramos plomo: 44.94g

Gramos de yodo: 100-44.94g = 55.06g

Así, la masa de plomo por gramos de yodo para el primer compuesto es:

44.94g plomo / 55.06g Yodo =

<em>0.8162 gramos de plomo por gramo de yodo</em>

<em></em>

Segundo compuesto:

Gramos plomo: 62.02g

Gramos de yodo: 100-62.02g = 37.98g

La masa de plomo por gramos de yodo para el segundo compuesto es:

62.02g plomo / 37.98g Yodo =

<em>1.633 gramos de plomo por gramo de yodo</em>

8 0
3 years ago
Which gas variable has to do with the amount of collisions of gas particles has?
Firlakuza [10]
The answer is temperature
3 0
3 years ago
A part of the periodic table is shown below:
mylen [45]
I think is oxygen that what i think
8 0
3 years ago
Read 2 more answers
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