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DedPeter [7]
3 years ago
8

Identify which of the bonds in calcium hydroxide, Ca(OH)2, are ionic and which are covalent.

Chemistry
2 answers:
Mandarinka [93]3 years ago
5 0

Answer:

The compound contains an Ca²⁺ ion and 2 OH⁻ ions ( this last ion is a polyatomic anion) These ions are held together by ionic bonds.  OH- consists of oxygen and hydrogen ions bonded by a covalent bond

Explanation:

The covalent bond is the chemical bond between atoms where electrons are shared, forming a molecule. Covalent bonds are established between non-metallic elements, such as hydrogen H, oxygen O and chlorine Cl. These elements have many electrons in their outermost level (valence electrons) and have a tendency to gain electrons to acquire the stability of the electronic structure of noble gas and complete their valence layer.

An ionic bond is produced between metallic and non-metallic atoms, where electrons are completely transferred from one atom to another. During this process, one atom loses electrons and another one gains them, forming ions. Usually, the metal gives up its electrons forming a cation to the nonmetal element, which forms an anion. In this way, the octet rule is fulfilled, which establishes that the atoms of the elements bind each other in the attempt to complete their valence layer, leaving the atom stable with 8 electrons in its last layer.

Finally, a polyatomic anion is a group of two or more atoms that are chemically bonded and have a negative charge. They are considered as a unit in chemical reactions.  Generalemte in this type of anions the electrons are shared by all the atoms of the polyatomic ion.  Then a covalent bond is established. One of the most common polycation anions is the hydroxyl ion (OH-).

So, in this case,  <u><em>the compound contains an Ca²⁺ ion and 2 OH⁻ ions ( this last ion is a polyatomic anion) These ions are held together by ionic bonds.  OH- consists of oxygen and hydrogen ions bonded by a covalent bond because it is a polyatomic where electrons are shared. And as previously mentioned, its negative charge means that the group of atoms has gained electrons.</em></u>

ira [324]3 years ago
4 0
<span>The bonds in calcium hydroxide, Ca(OH)2, </span> calcium hydroxide, is formed by ionic bonds between Ca2 and OHA. Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.
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A rectangular block has the following dimensions: 3.21 dm, 5.83 cm, and 1.84 in. The block has a mass of 1.94 kg. What is the de
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The density of the rectangular block in g/mL is 7.0.

<u>Given the following data:</u>

  • Mass of block = 22.8 gra1.94 kg
  • Length of block = 3.21 cm
  • Width of block = 5.83 cm
  • Height of block = 1.84 in.

To find the density of the block in g/mL:

First of all, we would determine the volume of the rectangular block by using the following formula:

Volume = length × width × height

<u>Conversion:</u>

1 in = 2.54 cm​

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Cross-multiplying, we have:

X = 2.54(5.83)\\\\X = 14.81 \; cm

Volume = 3.21 × 5.83 × 14.81

Volume = 277.16 cubic centimeters.

<u>Note</u>: Milliliter (mL) is the same as cubic centimeters.

1000 grams = 1 kg

Y grams = 1.94 kg

Cross-multiplying, we have:

Y = 1940 grams

Now, we can find the density:

Density = \frac{Mass}{Volume}\\\\Density = \frac{1940}{277.16}

<em>Density </em><em>= 7</em><em>.0 g/mL</em>

Therefore, the density of the rectangular block in g/mL is 7.0.

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