Which of the following is an anion?<br> A. O^2- <br> C. Al^3+ <br> D. H

Explain how the absorption of energy (heating) affects the speed of the particles in a substance

Crazy boy [7]

Answer:

when a substance is cool the particles in the substance contracts, but when heated the particles expand and pressure becomes high that way the particles tend to move faster in the container, in other to escape.

5 0

3 years ago

Based on your understanding of how bond types influence a material’s properties, identify each of the following compounds as bei

siniylev [52]

Answer: The given compounds are identified as being made of ionic, covalent, or metallic bonds:

Steel - Metallic bonds
Propane - Covalent bonds
Calcium chloride - Ionic bonds
Water - Covalent bonds

Explanation:

A bond formed by transfer of electrons from one atom to another is called an ionic bond. An ionic bond is formed between a metal atom and a non-metal atom.

A bond formed by transfer of electrons from one atom to another is called a covalent bond. A covalent bond is formed between two or more non-metal atoms only.

Steel is actually an alloy of carbon and iron where there is less than 2% carbon, 1% manganese and small amounts of silicon, phosphorus, oxygen and sulphur are present.

When atoms of metals are held together then bond formed between these atoms is called metallic bond.

Hence, steel is made of metallic bond.

Chemical formula of propane is $CH_{3}CH_{2}CH_{3}$ as there are only non-metal atoms are present. So, sharing of electrons takes place in such atoms due to which covalent bonding will be there.

Hence, propane is made up of covalent bonds.

Calcium chloride contains a metal and a non-metal atom. This means that electrons are being transferred from calcium atom to the chlorine atom. Hence, bond present in calcium chloride is ionic bond.

Water has chemical formula $H_{2}O$ . Since, non-metal atoms are present there so sharing of electrons takes place between hydrogen and oxygen atoms. Hence, covalent bond is present in water.

Thus, we can conclude that given compounds are identified as being made of ionic, covalent, or metallic bonds:

Steel - Metallic bonds
Propane - Covalent bonds
Calcium chloride - Ionic bonds
Water - Covalent bonds

7 0

3 years ago

The rate law for the rearrangement of ch3nc to ch3cn at 800 k is rate = (1300 s-1)[ch3nc]. what is the half-life for this reacti

Lana71 [14]

The rate of reaction is always expressed in concentration per time like mol/L·s. The equation is:

r [mol/L·s] = kCⁿ, where n is the order of reaction. Since k is 1300/s, that means that Cⁿ = C such that (1/s)*(mol/L) = mol/L·s. Thus, n=1. For a first order reaction, the formula would be:

ln(A/A₀) = -kt
where
A is the amount of material after time t
A₀ is the amount of material at t=0

The half life is when A/A₀ = 1/2÷1 = 1/2. Thus, the half-life t is:

ln(1/2) = (-1300t)
t = 5.33×10⁻⁴ seconds

3 0

3 years ago

SOMEONE PLEASE HELP ME!!!

pantera1 [17]

Go get a science teacher but i think it is because ................

6 0

4 years ago

During which phase of the moon does a lunar eclipse occur?

Lelu [443]

Full moon
A lunar eclipse can occur only at full moon. A total lunar eclipse can happen only when the sun, Earth and moon are perfectly lined up — anything less than perfection creates a partial lunar eclipse or no eclipse at all.

3 0

3 years ago

Which of the following is an anion? A. O^2- C. Al^3+ D. H