Chemistry Questions ................?

I'm looking over a study guide for a chemistry test tomorrow and I don't understand these questions....please help me?

1. Which of the following does Coulomb's law state?

A. An ionic bond will halve in strength if the charge of one of the ions doubles.

B. An ionic bond will double in strength if the charge of one of the ions doubles.

C. There will be no change in ionic bond strength as the charges of the ions are changed.

D. Ionic compounds tend to be crystalline.

2. What is the difference between a crystalline solid and an amorphous solid?

A. An amorphous solid has a high degree of order at the atomic level, whereas a crystalline solid does not.

B. In a crystalline solid, like-charged atoms touch one another, but in an amorphous solid they do not.

C. A crystalline solid has a high degree of order at the atomic level, whereas an amorphous solid does not.

D. An amorphous solid can undergo cleavage, whereas a crystalline solid cannot.

3. Which statement(s) is/are true regarding chemical (ionic and covalent) bonds?

Check all that apply.

A. It always takes energy to break a chemical bond.

B. Energy is absorbed when a chemical bond is formed.

C. Energy is always released when a chemical bond forms.

D. Energy is always released when a chemical bond is broken.

4. Which statement is correct regarding helium?

A. It forms covalent bonds with itself to satisfy the octet rule.

B. It refuses to form covalent bonds with itself because its duet is already satisfied.

C. It is monoatomic because it has no valence electrons.

D. It exists as diatomic molecules, just like and .

5. Under what conditions should it be expected that a multiple bond between atoms in a molecule will form?

A. A nonmetal atom is involved.

B. All of the valence electrons have been used in drawing a dot diagram, and one or more of the atoms still has less than an octet.

C. A group IVA element is involved.

D. A molecule needs bonds that are stronger than single bonds.

2 Answers

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  • Rais
    Lv 6
    7 years ago
    Favorite Answer

    1. Which of the following does Coulomb's law state?

    B. An ionic bond will double in strength if the charge of one of the ions doubles.

    2. What is the difference between a crystalline solid and an amorphous solid?

    C. A crystalline solid has a high degree of order at the atomic level, whereas an amorphous solid does not.

    3. Which statement(s) is/are true regarding chemical (ionic and covalent) bonds?

    Check all that apply.

    A. It always takes energy to break a chemical bond.

    C. Energy is always released when a chemical bond forms.

    4. Which statement is correct regarding helium?

    B. It refuses to form covalent bonds with itself because its duet is already satisfied.

    5. Under what conditions should it be expected that a multiple bond between atoms in a molecule will form?

    B. All of the valence electrons have been used in drawing a dot diagram, and one or more of the atoms still has less than an octet.

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  • 3 years ago

    sturdy question! I see your confusion right here. somewhat, once you upload hearth to wax then it relatively is slightly bit the two. Wax will soften devoid of hearth inspite of the undeniable fact that so only melting wax is a actual exchange whilst hearth isn't in contact. enable me attempt to describe. a million. hearth is a chemical reaction. It desires oxygen and yet another flamable fabric with a view to ensue. Oxygen is an extremely reactive element and whilst it reacts with yet another element or compound to create new compounds it supplies off warmth (noted as an exothermic reaction). 2. Candle wax isn't an element yet a mix of compounds. the climate that make up candle wax are not all bonded chemically on the effortless point. an excellent variety of it somewhat is purely stirred in authentic nicely so as which you will no longer see it. it somewhat is no longer related to something, only being held there via different compounds that variety in shape. it somewhat is noted as a homogeneous answer. in case you combine oil and water at the same time and shake very okay, you're able to get a number of the oil to no longer flow on the instant to the coolest. a number of the oil gets suspended interior the water. inspite of the undeniable fact that, the two do no longer chemically combine, they only mixture. the appropriate thank you to illustrate this could be to mixture oil and water at the same time relatively nicely, then freeze it quickly previously the oil can completely become self sustaining from the water. as quickly as you have performed this, you effectively have a candle. The oil interior the frozen water will burn as quickly as uncovered to the air, melting the ice inflicting greater oil to be uncovered. It won't burn all that quickly (only like a candle) because of the fact all of the oil interior the water would not get uncovered at as quickly as. it somewhat is because of the time it takes the hearth from the little drops of oil to soften the encompassing ice. So, the respond to your question is it somewhat is the two! it relatively is a actual exchange because of the fact the warmth from the hearth melts something of the candle it somewhat is far less flammable. the hearth is a chemical reaction to compounds interior the wax that are greater flamable than something of the wax. Sorry for the size yet who could have theory that only letting a candle burn is somewhat a complicated chain of activities.

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