Using a lattice structure of sodium chloride, explain why sodium chloride:


a) forms crystals that are cubic in shape [2]

b) has a high melting point [2]

c) acts as an insulator when solid, but will conduct electricity when molten. [2]

Answers

Answer 1

Answer:

hope it helps plz mark me brainliest!

Explanation:

a) This pattern is repeated in all directions, giving a giant three-dimensional lattice structure in sodium chloride crystals. Because of the strong electrostatic forces between them, it takes a great deal of energy to separate the positive and negative ions in a crystal lattice.

b) Sodium chloride has a high melting and boiling point. There are strong electrostatic attractions between the positive and negative ions, and it takes a lot of heat energy to overcome them. Ionic substances all have high melting and boiling points.

c) In the solid state, ionic compounds such as sodium chloride have their ions fixed in position and therefore these ions cannot move so solid ionic compounds cannot conduct electricity. However in the molten state, ions in ionic compounds are free to flow and therefore molten sodium chloride can conduct electricity.

Answer 2

Answer:

i am not sure

Explanation:

you are going to go far


Related Questions

Choose all the answers that apply.

Nitrogen has an atomic number of 7. Its atomic mass is 14. Nitrogen has _____.

seven electrons
seven neutrons
seven electron shells
23 neutrons
14 electrons

Please help (:

Answers

Seven electrons. The atomic number of a element is also the amount of protons and electrons it has.
As atomic Number is number of protons Or number of electrons so
N has 7 electrons
Neutrons= Mass no.- Atomic Number
= 14-7
N has 7 neutrons
N doesn’t have 7 electron shells because shell 1 can hold 2 electrons and shell 2 can hold 8 electrons
It doesn’t have 23 neutrons and 14 electrons

So, Seven Electrons and seven neutrons is correct

Elements in the same group have _____.

the same number of electron shells
the same number of protons
similar chemical properties
the same number of isotopes

Answers

Answer:

Element in the same group have similar chemical properties.

the same number of electron shells

Landon's new toy arrived in the mail covered in foam packing peanuts. The foam packing peanuts have a mass of 30 g and a volume of 60 cm3. What is the density?

2 g/cm3
180 g/cm3
0.5 g/cm3
2

Answers

Here’s your answer 0.5 g/cm3
2 g / cm3 18g/cm3 one is 0.5G/ cm3 and the other 2 g / cm 4

What type of energy is associated with this movement of the molecules?

Answers

Answer:

electric

Explanation:

Thermal energy,
or heat energy
( same thing)

is the energy that comes from the movement of atoms and molecules in a substance. Heat increases when these particles move faster.

How is radiant energy from the microwave transformed into heat energy?

Answers

The waves emitted from the microwave sends the molecules within the object into a faster motion. The heat is generated from the faster movement of the molecules in the object. ... It is only transformed into new substances or energies.

Radiant energy comes from gravitational and electromagnetic radiations. This energy from the microwave is transformed into heat energy by the faster-moving molecules.

What is energy conversion?

Energy conversion is the process of transformation of the energy from one form to another that also follows the law of conservation of mass or matter. Radiant energy is the heat or energy that is given out by electromagnetic waves in the form of various waves.

This radiant energy has its own characteristics that differentiate it from other waves. The waves from radiant energy have a molecular speed that gets increased by the temperature and this increases collision and kinetic energy producing new substances and generating heat.

Therefore, the movement of particles in microwave transforms the radiant energy into heat energy.

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What is the difference between data and evidence???
Helpppp! I will give brainliest! PLSSS!

Answers

Data is just data and has no intrinsic meaning on its own. Evidence has to be evidence for or of something; an argument, an opinion, a viewpoint or a hypothesis. The evidence you use depends on your argument.
Data is calculated and evidence is pre existing

Hydrogen peroxide is commonly used to clean cuts and wounds. Its chemical formula is
H2O2. This compound has _____.

two atoms of hydrogen
three atoms of oxygen
three atoms of hydrogen
one atom of oxygen

Please help, take your time!

Answers

Answer:

two atom of hydrogen,two atom of oxygen

two atoms of hydrogen and two atoms of oxygen

Name and Title:

Include your name, instructor's name, date, and name of lab.


Objectives(s):

In your own words, what is the purpose of this lab?


Hypothesis:

In this section, please include the predictions you developed during your lab activity. These statements reflect your predicted outcomes for the experiment.


Procedure:

The materials and procedures are listed in your virtual lab. You do not need to repeat them here. However, you should note if you experienced any errors or other factors that might affect your outcome. Using your summary questions at the end of your virtual lab activity, please clearly define the dependent and independent variables of the experiment.


Data:

Record the elements present in each unknown astronomical object. Be sure to indicate “yes” or “no” for each element.

Hydrogen Helium Lithium Sodium Carbon Nitrogen
Moon One












Moon Two












Planet One












Planet Two













Conclusion:

Your conclusion will include a summary of the lab results and an interpretation of the results. Please answer all questions in complete sentences using your own words.

Using two to three sentences, summarize what you investigated and observed in this lab.
Astronomers use a wide variety of technology to explore space and the electromagnetic spectrum; why do you believe it is essential to use many types of equipment when studying space?
If carbon was the most common element found in the moons and planets, what element is missing that would make them similar to Earth? Explain why. (Hint: Think about the carbon cycle.)
We know that the electromagnetic spectrum uses wavelengths and frequencies to determine a lot about outer space. How does it help us find out the make-up of stars?
Why might it be useful to determine the elements that a planet or moon is made up of?

Answers

this seems like a class project
i support that frfr

what is the magnification equation and how do you use it?

anyone ill give best answer branliest i swear

Answers

you need to work harder next time
hello!
the magnification equation is the eyepiece lens x objective lens.
you would use this equation for calculating the length of a cell and the magnification is used to find the length of an image

Please help with questions 11-13! I’ll give brainliest

Answers

Answer:
11- 3
12- 4
13- 2
Answer:
11- 3
12- 4
13- 2 hope this helps

Why do scientists use models, and why do all models have limitations???
Plsss help! :) I will give brainliest!! :)

Answers

Answer:

Scientists use  models to represent data/evidence. However, all models have limitations. However, models are simplified versions of reality, and can't be totally accurate in representation.

Hope this helps :)

Answer:

Since models are simpler than real objects or systems, they have limitations. ... It may not predict the behavior of the real system very accurately. But the more computing power that goes into the model and the care with which the scientists construct the model can increase the chances that a model will be accurate.

What inert (noble) gas structure do hydrogen and carbon atoms have in sodium chloride?

Answers

The answer above is correct (I took a test on this)

Quartz, or silicon dioxide (SiO2), is one of the most abundant minerals on Earth. The diagram shows the atomic arrangement of quartz.

Based on the diagram, which statement best describes the atomic arrangement of quartz?
Group of answer choices

An extended structure that is made of repeating patterns of atoms.

A repeating pattern of small molecules that can move freely past each other

Many different kinds of molecules tha combine to form an extended structure.

Many different kinds of atoms that can move freely past each other.

Answers

Based on the atomic arrangement of quartz, it is can be concluded that quartz is an extended structure that is made of repeating patterns of atoms.

What is quartz?

Quartz is a hard crystalline mineral found within the Earth's crust and which is composed mainly of the mineral silica. Silica is mostly silicon(iv) oxide.

Quartz is colourless and its crystalline structure is of a hexagonal prism. The atoms are arranged in a regular repeating grid to form the hexagonal crystal.

Therefore, it is can be concluded that quartz is an extended structure that is made of repeating patterns of atoms.

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Methane is a gas at room temperature and pressure. Explain why this is the case.

Answers

Answer:

hope it helps ❤

Explanation:

Methane only has london dispersion forces since it is nonpolar. London dispersion force is the weakest intermolecular force, so the forces between its molecules will be weak. This leads to a low boiling point that is lower than room temperature, which makes it a gas at room temperature.

Methane has london dispersion forces since it is nonpolar. London dispersion force is the weakest intermolecular force, so the forces between its molecules will be weak. This leads to a low boiling point that is lower than room temperature, which makes it a gas at room temperature.

If there is not one scientific method, then what do all scientists have in common???
Plsss I will give brainliest, and 12 points !!

Answers

Answer:

One thing that all scientists have in common is that they find problems in the world, and attempt to seek answers to those problems. Everything that scientists do begins with observations, leading to questions.

Let me know if this helps!

While no single scientific method is uniformly followed by all scientists, there are certain common aspects and concepts that scientists share in their search of knowledge and understanding.

These are some examples:

Scientists rely on empirical evidence gathered via observation, experimentation, and measurement.

Systematic and Objective Investigation: Scientists explore and analyse events using systematic and objective approaches.

Scientific discoveries should be repeatable, which means that other researchers should be able to replicate the tests and achieve identical results.

Thus, although scientists' methodologies and approaches differ between fields, these basic principles drive their research and contribute to the collective growth of scientific knowledge.

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Explain the law of conservation of energy.

Answers

Energy is conserved. It never appears or disappears. It just changes from one kind of type to another. The Universe contains the same amount of energy it started with. This amount can never change.

Answer:

Energy cannot be destroyed or created but can be transformed from one form to another

Organisms can either be made of one cell or made of more than one cell

Answers

Answer:

The statement is true.

Explanation:

Organisms can be unicellular (made up of one cell) or multicellular (consisting of more than one cell).

I hope this helps in any way :)

Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function. Unicellular organisms include bacteria, protists, and yeast.

Suppose you spill a chemical on yourself:

a. What information can your teacher provide for you concerning that chemical?

b. Where is the information located?

Answers

They can tell you what will stop that chemical from doing damage and it should be located in the front of the class where you can see it
a. how a chemical can affect you. say it can give you a rash. they should tell you how to help it. how to properly get the chemical off without mixing any chemicals that can make it worse.

b. in the front of the class. or the back

What makes a good scientific question???
Plsss help! I will give brainliest! :)

Answers

Answer:

A good question is testable,  detailed, measured, and controlled.

Just let me know if you have any other questions.

Details, control and measurements.

What internal physical structure protects the organs and supports the body of the animal? Fur Feathers Skeleton Skin

Answers

Answer:

Skeleton

Explanation:

Answer:

skeleton

Explanation:

Each element has a different:

number of protons and electrons
atomic mass and weight
Properties and characteristics
number of neutrons

Please take your time if needed!

Answers

Properties and characteristics

Answer:

(C.  Properties and characteristics.

Hope this helpos!

Explanation:

Select all that apply.

Which items are properties of bases?

soapy
sour
bitter
slick
skin damage

Please

Answers

Answer:

soapy and bitter

Explanation:

This answer: Bitter and soapy

What physical structure of a plant is similar in function to these two objects? a long, narrow garden hose and a group of long plastic drinking straws Bark Pistil Stamen Stem

Answers

The answer is Stem

In the flower the stem is the one that helps transport the nutrients to every cell in the plant.

PLZ HELP I WILL GIVE BRAINLY AND POINTS
Put the steps of the scientific method into the correct order.

Devise an experiment to prove or disprove.
State conclusions.
Conduct a literature search.
Define the problem.
Propose a hypothesis.

Answers

Answer:

1. Define the problem

2. Conduct a literature search

3. Propose a hypothesis

4. Devise an experiment to prove or disprove

5. State conclusions

Explanation: In order to begin an experiment, you must first define a problem or question that you will be answering. Then you must research the problem in order to form a hypothesis, or an educated guess. Then you should devise and execute an experiment to answer your question. The conclusions that you draw will either prove or disprove your hypothesis. Hope this helps!

1. Define problem
2. Hypothesis
3. Search
4. Experiment
5. Conclusion

Sodium chloride (NaCl) is made from ___ of sodium (Na) and ___ of chlorine (Cl).

Blanks: One Atom and Two Atom

Answers

Answer:

one atom, one atom.

Explanation:

Sodium chloride is made from one sodium atom and one chlorine atom.

Sodium has a charge of +1,  Chlorine has a charge of -1. These cancel each other out leaving only one atom for both sodium and chlorine.

The correct answer is one atom for each space

Describe how the Rube Goldberg device design that you created follows the law of conservation of energy. Be sure to include both parts of the law of conservation of energy in your description.

Answers

Rube Goldberg machines follows law of conservation of energy. In this machine when marble rolls down from top it has kinetic energy.
In this machine, a various instant kinetic energy is transferred into potential energy and vice-versa , so the total energy remain conserved. Thus Rube Goldberg machines follows law of conservation of energy. In this machine when marble rolls down from top it has kinetic energy.

What determines the amount of chemical energy a substance has? (Try not to make it long)

Answers

Answer: The bonds that hold molecules together contain the chemical energy available in a substance.

Explanation:

The amount of chemical energy is dependent on the kinds of arrangements of atoms.

Why do scientists need to be able to use math?

Answers

Many answers. For example because for science experiment researcher they use math to calculate an amount of effected, people and therefore analyze it by those numbers
To make sure that the amount of whatever they’re using is correct

what is the goal of science??

Answers

There are three goals in science:1. Investigate and understand the natural world.2. Explain events in the natural world.3. Use those explanations to make predictions.Science seeks to increase man's knowledge and to use that knoledge to directly or indirectly benefit man.

The main goal of science has been building knowledge and understanding, regardless of its potential applications.

What is Science ?

The intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.

For example, investigating the chemical reactions that an organic compound undergoes in order to learn about its structure.

Therefore, The main goal of science has been building knowledge and understanding, regardless of its potential applications.

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what are the function of a objective lens and the ocular lenses

Answers

Answer:

Explanation:

The objective lens gather light from the specimen, magnifies the image of the specimen and projects the magnified image into the body tube. The ocular lens magnifies the image. It contains a measuring scale called a ocular micrometer.

the ocular lends magnifies so you can better see the specimen
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