What is the disadvantage of using models to study the food web?

Classify the solid state of the following substances as ionic crystals, covalent crystals, molecular crystals, or metallic cryst

Mice21 [21]

Explanation:

There are four type of crystals possible in solids state , given as follows -

1. Ionic crystals -

In this type of crystals ionic bond is involved for the bonding between two atoms , which connects two oppositely charged atoms , i.e. , cation and anion together .

The ionic crystal from the given options are -

(d) KBr and (g) LiCl .

2. Covalent crystals -

The bond formed in these type of crystals are from share the electrons , i.e. making a covalent bond .

Hence ,

From the given options , the covalent crystals are -

(b) B₁₂ and (f) SiO₂ .

3. Molecular crystals -

weak intermolecular forces , like the dispersion forces , holds the atoms together , generating a molecular crystal .

Hence ,

From the given options , the molecular crystals are -

(a) CO₂ and (c) S₈

4. Metallic crystal -

The type of bond , which make up a metallic crystal is , the metal cation with the delocalized electrons .

Hence ,

From the given options , the metallic crystals are -

(e) Mg and (h) Cr

8 0

3 years ago

Which of the following atoms contains the same number of neutrons as an atom of Fluorine-19?

Pani-rosa [81]

In Flourine-19, you can determine that the number of Neutrons is 10.

Now, if you look at Neon-20, you subtract its mass by the number of protons, leaving you with 10.

Therefore, Neon-20 has the same number of neutrons as Flourine-19.

8 0

4 years ago

Read 2 more answers

Neutrons have neither charge nor mass.<br> TRUE<br> FALSE

iren2701 [21]

Answer:

FALSE

nuetrons do indeed have no charge, however they are nearly 2000 more times massive than electrons.

7 0

3 years ago

Pleasee help me answer this question

sukhopar [10]

Answer:

B. pollution

Explanation:

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3 years ago

A lab director asks two students, Lydia and Damien, to each select a bottle of a concentrated weak base. When they reach the cab

algol13

Lydia and Damien should select the bottle of weak base with high molarity(M)

<h3>Further explanation</h3>

According to Arrhenius, Base is a compound which in water releases OH- ions

Electrolytes (acids or bases) with a small degree of ionization are classified as weak electrolytes

If two students, Lydia and Damien, select each bottle of a concentrated weak base, then a guide can be chosen to choose some of the solutions available in the lab :

Base compounds are usually known from their names ending in hydroxide suffixes such as NaOH, sodium hydroxide

The weak base will be partially ionized in water because the ionization degree is close to 0 or less than 1

If there is a Kb value (base ionization constant), then this shows the strength of the base. The greater the value of Kb, the greater the base strength

If there are some weak bases, then Lydia and Damien choose the highest concentration, usually indicated by the value of Molarity (M)

Because no choice solution is included, the weak base example is:

Ammonia (NH₃)

Aluminum hydroxide (Al (OH)₃)

Copper (II) hydroxide Cu (OH)₂

Mercury (II) hydroxide Hg (OH)₂

<h3>Learn more</h3>

the Brønsted theory

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base would not effectively deprotonate acetylene

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Keywords : weak base, select a bottle, chemical solutions

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8 0

3 years ago