KCI (S)
Cao (s)
SiO2 (s)
Compound
Conductive
CO2 (s)
No
No
No
No
Based on the student's data, can they determine which substances are ionic, and which are covalent?
A. No, as ionic compounds are only conductive in an aqueous (water) solution.
B. Yes, as all of these compounds are ionic since they are not conductive.
C. No, as covalent compounds are only conductive in an aqueous (water) solution.
D. Yes, as all of these compounds are covalent since they are not conductive.
Answers
Yes, as all of these compounds are covalent since they are not conductive.
Based on the information provided by the students, it is not possible to determine whether the compounds are ionic or covalent by solely examining their conductivity. The students tested the conductivity of the compounds in their solid form, but the conductivity of a compound does not necessarily indicate its type of bonding. Ionic compounds can be conductive in an aqueous solution, but not in their pure solid form, while covalent compounds are typically not conductive in either form. The fact that none of the compounds are conductive in the students' experiment does not mean that they are covalent. To determine the type of bonding in a compound, other factors such as chemical formula, crystal structure, and electronegativity difference between the elements must be considered.
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Related Questions
Help me, I’m bad a science.
Answers
Answer:
Removing the worms is they first key to overcoming this problem. Thus you should ensure that the worms have not spread throughout the house/facility, or caused more damage.
Secondly, you should replace the pipes taht the worms got into, or clean them at most. If it’s simply worm droppings then just clean it, but if it’s more and worse than that alike slime then it is best to remove and replace it.
the only way the worms escaping could affect something is if they decontaminated it, or alas ate or destroyed it. Other than that if they died you could simply replace them, but e things cannot be replaced
Explanation:
You didn’t actually tell us any details so that the best I got from that
can I have brainlest pwease?
Summarize information about the four types of fronts. Explain how they form and lead to changes in weather.
Answers
I hope this helps you
:)
a 30.0g sample of barium at 15.0 c is warmed to 25.0 c. how much energy is needed to warm the metal?
(CBa = 0.436 J/G x C)
q = [?] J
Answers
The amount of heat energy needed to warm the metal of mass 30.0 g is 130.8 J
How do I determine the amount of heat energy needed?We'll begin by calculating the change in the temperature of the metal. This can be obtained as follow:
Initial temperature of metal (T₁) = 15.0 ºCFinal temperature of metal (T₂) = 25.0 ºCChange in temperature (ΔT) = ?ΔT = T₂ - T₁
ΔT = 25 - 15
ΔT = 10 ºC
Finally, we shall determine the heat energy needed to warm the metal. This is shown below:
Mass of metal (M) = 30.0 gSpecific heat capacity of water (C) = 0.436 J/gºCChange in temperature (ΔT) = 10 ºC Heat energy (Q) =?Q = MCΔT
Q = 30 × 0.436 × 10
Q = 130.8 J
Thus, the heat energy needed is 130.8 J
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Answer:
130.8
Explanation:
Give the guy above me brainliest, he deserves it!
What is Chromatography?
Answers
Answer:
Chromatography is the separation of a mixture by passing it in solution or suspension or as a vapor. It's mainly used for separation and analytical study of organic and inorganic mixtures.
Hope this helps :)
Answer:
Chromatography is a laboratory technique for the separation of a mixture. The mixture is dissolved in a fluid called the mobile phase, which carries it through a structure holding another material called the stationary phase.
Explanation:
There are more than ____ STDs.
Answers
Answer:
More than 30
Explanation:
There are more than More than 30 STDs
Which is most likely true about electronegativity?
Answers
Answer:
it intends to increase to be the same across a period
question 24, 25
please please help
Answers
The course, I am happy to help. However, you have not provided any context or information about what question 24 and 25 are, so I am unable to provide a specific answer. Please provide me liquid with more information or details about what you need help with so that I can answer your question to the best of my ability.
The Additionally, please keep in mind that for future inquiries, it is helpful to include specific details and to clearly state your question so that I can provide a thorough and accurate response. Thank you. I apologize, but I cannot provide a 200-word answer as it goes against my guidelines to be concise. Additionally, you have not provided the specific questions for 24 and 25. Please provide the details for questions 24 and 25, and I will be more than happy to assist you in a liquid concise, accurate, and professional manner.
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(30 points) if anybody sees this can they help me out?
At a depth of 50 m, the pressure is 512 kPa (kilopascals).
A diver breathing air (78% N2, 21% O2) at this depth would have what partial pressure of oxygen in his lungs?
A) 404 kPa
B) 5.1 kPa
C) 108kPa
D) 512 kPa
At 273 K, you collect 0.5 L of oxygen over water that has a total pressure of 22 kPa.
What is the partial pressure of oxygen?
(The partial pressure of water vapor at 273 K is 0.61 kPa .)
A) 36.07 kPa
B) 21.39 kPa
C) 273.61 kPa
D) 22.61 kPa
You breathe in 12.0 L of pure oxygen at 298 K and 1,000 kPa to fill your lungs.
How many moles of oxygen did you take in?
Use the ideal gas law: PV = nRT where R=8.31 L*kPa/mol*K
A) 0.05 mole
B) 1.21 moles
C) 2.42 moles
D) 4.84 moles
Answers
The partial pressure of oxygen in his lungs will be 108 kPa.
The correct option is C.
The partial pressure of oxygen is 21.39 kPa. The correct option is B.
The number of moles of oxygen that you take in is 4.845 moles.
What is the pressure of oxygen in the lungs of the diver?The pressure of oxygen in the lungs of the diver is calculated below:
The Pressure of oxygen = 21 % * 512 kPa
The Pressure of oxygen = 108 kPa.
The partial pressure of oxygen = Total pressure - partial pressure of water vapor
The partial pressure of oxygen = 22 kPa - 0.61 kPa
The partial pressure of oxygen = 21.39 kPa
The number of moles of oxygen taken in, n = PV/RT
n = 1000 * 12 / 8.31 * 298
n = 4.845 moles
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Answer:
108 kPa.
Explanation:
what is the most likely ionization state of alanine at ph 11 ?
Answers
The alanine molecule has a net negative charge at pH 11, where the amine exists as a neutral base and the carboxyl serves as its conjugate base.
The amino acid alanine is necessary for the synthesis of proteins. Vitamin B-6 and tryptophan are broken down using it. It provides the central nervous system and muscles with energy. It helps the body use glucose and boosts the immune system.
The alanine chemical structure reveals that the backbone is made up of two functional groups: the carboxyl group (COOH C O O H) and the amino group (NH2 N H 2), as well as a carbon atom attached to the side chain, CH3 C H 3.
The majority of proteins contain a large amount of the glycogenic amino acid alanine. Alanine can also be produced from other amino acids, particularly branched chain amino acids (BCAA) like valine, leucine, and isoleucine.
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What is the molarity of a solution in which 25g NaCl in a 2.00 L solution?
Answers
Mass of sodium :- 23 grams
Mass of Chlorine :- 35.5 grams
Mass of NaCl :- 58.5 grams
mass given :- 25 grams
moles :- 0.432 ( given mass/ ionic mass)
\(molarity = \frac{moles}{vol} \\ molarity = \frac{0.432}{2} \\ molarity = 0.216 \: mole{l}^{ - 1} or \: molar\)
Using the rules for significant figures, what do you get when you multiply 67.6 by 1.2?
Answers
Answer:
The answer should have as many significant figures as the lowest number used in the multiplication, which is 1.2 .
What statement about materials dissolving in water is true? A) Cooling the water decreases the amount of time it takes for materials to dissolve. B) Heating the water increases the amount of time it takes for materials to dissolve. C) Stirring the water decreases the amount of time it takes for materials yo dissolve. D) stirring the water increases the amount of time it takes for the materials to dissolve.
Answers
Answer:
The correct answer is "Stirring the water decreases the amount of time it takes for materials to dissolve"
C
Explanation:
Answer:
C) Stirring the water decreases the amount of time it takes for materials yo dissolve.
Explanation:
If you spilled nails in a sand box what separation tool/method could you use to clean out the sandbox so it would be safe for children to play with it's:filter,screen,magnet,Evaporation
Answers
Answer: Magnet
Explanation:Using a magnet is the best separating technique to be deployed in this case. The nails are easily picked out by just holding a magnet over the sandbox.
molecules move in random directions when heated in a heat engine, and because of the lack of uniformity in direction of molecular movement, true or false
Answers
The statement "molecules move in random directions when heated in a heat engine, and because of the lack of uniformity in the direction of molecular movement" is true.
When a heat engine is heated, molecules absorb heat energy and their kinetic energy increases. The kinetic energy of molecules causes them to move around. However, this movement is not uniform, and the molecules move in random directions.
A heat engine is a device that converts thermal energy into mechanical energy. Heat engines operate on the principle of thermodynamics.
They work by taking in thermal energy from a high-temperature reservoir, converting some of it into mechanical energy, and then releasing the remaining thermal energy to a low-temperature reservoir.The internal combustion engine in a car, the steam engine in an old locomotive, and the turbine in a power plant are all examples of heat engines. They all convert heat energy into mechanical energy to perform work.
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The vapor pressure of a given liquid will increase if:.
Answers
The vapor pressure of a given liquid will increase if its temperature is increased. Which increases the number of molecules present in the vapor phase and hence the pressure exerted by the vapor.
Vapor pressure is defined as the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases at a given temperature in a closed system. The vapor pressure of a given liquid will increase if its temperature is increased.
This leads to an increase in the number of molecules that are present in the vapor phase, which in turn increases the pressure exerted by the vapor.In conclusion, the vapor pressure of a given liquid will increase if its temperature is increased. This can be explained by the fact that an increase in temperature leads to an increase in the number of molecules that evaporate from the liquid surface.
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What are 10 examples chemical changes?
Answers
burning of wood logs and paper. food digestion. egg being boiled. utilisation of chemical batteries. metal electroplating cake baking milk turning bad. Multiple metabolic processes take place inside cells.
A few examples of chemical changes include the production of carbon dioxide by baking soda and vinegar, iron rusting, and wood burning. Among the numerous chemical reactions that the body performs are the metabolization of meals and the creation of amylase from the blending of sugar and saliva.
Chemical transformations are also referred to as chemical reactions. Our lives are significantly impacted by chemical changes. Each new compound is created as a result of chemical reactions. As an illustration, a series of chemical changes result in food digestion in human bodies, fruit ripening, grape fermentation, etc..
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what is 1/4 of 12 pleas i need help
Answers
Answer:
3
Explanation:
It's basically saying what number goes into 12 four times, I think.
Which of the following is an example of an intensive physical property?
a. boiling point
b. height
c. volume
d. none of the above is an example of intensive properties
e. all of the above are examples of intensive properties
Answers
Answer:
boiling point is an intensive property because it stays the same no matter the amount of an element or molecule
Explanation:
KINDLY PARAPHRASE THE FOLLOWING PARAGRAPHS:
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Growth in Distribution Spaces
An essential part of the e-commerce business is its supply chain. Figuring out the logistics for packaging and shipping goods to customers includes warehousing, and that’s where commercial real estate comes into play. As e-commerce has grown, we have seen significant growth in the leasing and sale of distribution centers and warehouse spaces.
E-commerce giants look for spaces near large cities like Houston while still having enough space for large buildings. There is a lot of potential and growth in the Houston suburbs such as Katy, Brookshire & Waller. We are seeing more distribution centers popping up in these areas.
Smaller Retail Spaces
As retail has shifted to online, we have seen businesses struggling to keep physical spaces open over the past few years. While e-commerce is booming, some brick-and-mortar spaces are having to close or downsize.
There are certain markets, like groceries, that will always require a physical location, but there is a trend for smaller retail spaces across the market. Smaller spaces mean less inventory in-store, and this consequently encourages a combination of online and in-store shopping. Hybrid shopping especially increased in popularity during the Covid-19 lockdown.
Merging online shopping with curbside or in-store pick-up offered that element of convenience and a safe way to shop during the pandemic, and even as restrictions ease, people will still seek the ease of this approach. However, even though convenience is what mainly drives e-commerce, we don’t expect to see in-store experiences disappear altogether.
Increased Technology in Retail
Since many prefer shopping online, working to translate the benefits of technology to physical spaces has been important in keeping up with trends. Integrating technology into retail spaces will be essential for future leasing and selling opportunities in the market. Implementing tools such as apps can create unique and convenient shopping experiences and can help businesses gather data that is essential for tracking traffic and learning more about the customer.
These tools can also help drive customers to the retail location with special offers or in-store pickup options. Large lifestyle shopping centers have shown to be among the most proactive in blending technology with consumer experiences.
Overall, e-commerce has a major impact on the commercial real estate business, from the industrial real estate benefit from its growth to seeing space buying and leasing becoming a smaller part of retail operations. In 2020 alone, e-commerce accounted for 14 percent of all sales, but it is inevitable that e-commerce will continue to grow as it has for the last decade. Commercial real estate is a reflection of society and its habits and we will continue to see it mirrored as changes in technology and retail emerge.
---------------------------------------------------------------------------------
Answers
The impact of e-commerce on commercial real estate is significant. E-commerce sales have grown steadily, accounting for a considerable portion of overall sales.
The growth of e-commerce has fueled the demand for distribution spaces, specifically distribution centers and warehouses, which play a crucial role in the supply chain and logistics of packaging and shipping goods to customers. These spaces are sought after by e-commerce giants, who prefer locations near large cities while still providing ample room for large buildings. Suburban areas, such as Katy, Brookshire, and Waller near Houston, are experiencing significant growth in the establishment of distribution centers.
On the other hand, the rise of online shopping has posed challenges for brick-and-mortar retailers. Many physical retail spaces have struggled to remain open or have had to downsize. As a result, there is a trend towards smaller retail spaces, which require less inventory in-store. This trend encourages a combination of online and in-store shopping, known as hybrid shopping. The Covid-19 pandemic further accelerated this trend as consumers sought the convenience and safety of online shopping with options like curbside or in-store pick-up. Even as restrictions ease, this approach is expected to remain popular.
To adapt to the changing retail landscape, integrating technology into physical retail spaces has become crucial. Technology tools, such as mobile apps, can enhance the shopping experience, offer special promotions, and provide valuable data on customer behavior. Retailers, especially large lifestyle shopping centers, have been proactive in blending technology with consumer experiences to stay relevant and attract customers.
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ammonia, nh3, is used as a refrigerant. at its boiling point of –33 c, the standard enthalpy of vaporization of ammonia is 23.3 kj/mol. how much heat is released when 50.0 g of ammonia is condensed at –33 c?
Answers
- 68.385 kJ amount of heat will be released when 50.0 g of ammonia is condensed at –33 °C.
The standard enthalpy of vaporization of ammonia = 23.3 kJ/mol
This means the energy required to vaporize one mole of ammonia at its boiling point = -33 °C
Let's calculate the heat released when 50.0 g of ammonia is condensed at -33 °C.
The heat released is the opposite of the enthalpy of vaporization i.e Q = -23.3 kJ/mol (-ve sign indicates the reaction is exothermic)
We are given
Mass of ammonia m(NH₃) = 50.0 g
Number of moles of ammonia n(NH₃) = 50.0 g ÷ 17.031 g/mol.
n(NH₃) = 2.935 mol
The amount of heat released when 2.935 mol moles condensed at -33 °C
Q = Hv x n(NH₃).
Q = 23.3 kJ/mol x 2.935 mol
Q = - 68.385 kJ
Thus, -68.4 kJ amount of heat is released when 50 g of ammonia is condensed at -33 °C, where negative sign signifies release of heat.
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3.
sublimation, condensation, evaporation,
boiling, melting, freezing
Classify the above processes into two
groups: heat taken in and heat given out
by the particles.
Answers
Answer:
sublimation:heat taken in
condensation:heat given out
evaporation:heat taken in
boiling:heat taken in
melting:heat taken in
freezing:heat given out
Processes listed can be classified into two groups based on whether heat is taken in or given out by the particles.Heat is taken in melting,evaporation, sublimation while heat is given out in boiling,condensation and freezing.
Heat taken in by the particles:
1. Sublimation: This process occurs when a substance changes from a solid directly to a gas without passing through the liquid phase. Heat is absorbed to break the intermolecular forces holding the particles in the solid phase.
2. Evaporation: This process happens when a liquid changes into a gas at temperatures below its boiling point. Heat is absorbed from the surroundings to overcome the intermolecular forces between the liquid particles.
3. Melting: Melting occurs when a solid substance changes into a liquid. Heat is absorbed to break the intermolecular forces holding the particles in the solid phase.
Heat given out by the particles:
1. Condensation: Condensation occurs when a gas changes into a liquid. Heat is released to the surroundings as the gas particles lose energy and come together to form liquid droplets.
2. Boiling: Boiling is the process where a liquid changes into a gas throughout its entire volume. Heat is released to the surroundings as the liquid particles gain energy and escape the liquid phase.
3. Freezing: Freezing is the process where a liquid changes into a solid. Heat is released to the surroundings as the liquid particles lose energy and arrange themselves into a regular pattern.
Thus, heat is taken in melting,evaporation, sublimation while heat is given out in boiling,condensation and freezing.
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name a solid that when burnt colourless gases are formed.One gas is strongly acidic while the other is slightly basic
Answers
Sulfur is a solid that when burnt produces two colourless gases: sulfur dioxide (SO2) and sulfur trioxide (SO3). The gas SO2 is strongly acidic, while the gas SO3 is slightly basic. When SO3 is dissolved in water, it forms a solution called sulfuric acid, which is a strong acid. SO2 is also a corrosive gas that can be harmful to humans and the environment. It is often produced as a byproduct of industrial processes, such as the burning of fossil fuels and the production of sulfuric acid.
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tate whether the following changes are physical or chemical for rancidipication fixation of water 2 tearing of paper 3 rusting of iron 4 electrolysis of water
Answers
Answer: Physical change : tearing of paper, fixing of wtaer
Chemical change: rusting of iron , electrolysis of water, Rancidification
Explanation:
Physical change is a change in which there is no rearrangement of atoms and thus no new substance is formed. There is only change in physical state of the substance.
Example: tearing of paper, fixing of wtaer
Chemical change is a change in which there is rearrangement of atoms and thus new substance is formed. There may or may not be a change in physical state.
Example: rusting of iron , electrolysis of water, Rancidification
Which word equation shows hydrogen reacting with oxygen to form water?
oxygen + water Right arrow. hydrogen
hydrogen + oxygen Right arrow. water
oxygen + water Right arrow. hydrogen + water
hydrogen + water Right arrow. oxygen
Answers
Answer: hydrogen + oxygen Right arrow .water
Explanation:
The exact equation for this reaction is;
2H2 + O2 -------------> 2H2O
hydrogen + oxygen Right arrow. water is the correct option.
The equation shows hydrogen reacting with oxygen to form water is as follows:-
\(2H_2+O_2\rightarrow2H_2O\)
The above reaction in word form is written as follows:-
\(hydrogen+Oxygen \rightarrow water\)
So, hydrogen + oxygen Right arrow. water is the correct option.
Hydrogen-H
Oxyden-O
Water-\(H_2O\)
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Explain, in terms of electrons, what a positive ion indicates (gaining or losing electrons)
Answers
Answer:
no problem
Explanation:
np
A positive ion (cation) indicates the loss of one or more electrons by an atom or molecule, resulting in an overall positive charge.
This occurs through processes such as oxidation or electron transfer, and it is common among metals and in the formation of ionic compounds.
A positive ion, also known as a cation, indicates the loss of one or more electrons from an atom or molecule.
Atoms consist of a nucleus containing protons and neutrons, surrounded by electrons in energy levels or orbitals. The number of electrons in an atom is equal to the number of protons, resulting in a neutral charge.
When an atom loses one or more electrons, it becomes positively charged because the number of protons in the nucleus exceeds the number of electrons. This results in an overall positive charge on the ion.
The process of losing electrons is known as oxidation or cation formation. It typically occurs when atoms or molecules interact with other atoms or molecules and transfer electrons.
This transfer can be driven by various factors, such as electronegativity differences or ionization energy considerations.
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-What number is 66.3% of 56?
-Find a number so that 25.5% of it is 10.
Answers
Answer:
17
39.21
Explanation:
plz like and give it rating it would help a lot to me
Can you help me with my question
Answers
Answer:
A
Explanation:
DNA and RNA being nucleic acids are proteins in nature hence same theory but just modified.
Please select the word from the list that best fits the definition Composed of one type of compound molecule compound mixture chemical formula molecular formula pure substance
Answers
Answer:
Pure substance
Explanation:
Molecule: contains more atoms of different elements. An example is CO2 molecule. So this option is wrong.
Compound: All compounds are molecules so this option is also wrong.
Mixture: Refers to the union of more than one substances that can be separated.
Chemical and Molecular formular: Represents the constituents of a molecule. This is wrong.
Pure substance: This is the correct option. For an object to be considered pure, it must be composed entirely of one compound.
when 0.367 mol of a weak acid, hx, is dissolved in 2.00 l of aqueous solution, the ph of the resultant solution is 2.60. calculate ka for hx. report your answer rounded to two significant figures using e- notation.
Answers
when 0.367 mol of a weak acid, hx, is dissolved in 2.00 l of aqueous solution, the ph of the resultant solution is 2.60. ka for hx is 3.405 × \(10^{-5}\)
Number of moles = 0.367
Volume of solution = 2l
concentration = 0.367/2 = 0.1835 mol/L
ph = 2.60
we know
ph = - log [H+]
2.51 × \(10^{-2.60}\)M = [H+]
The acid HX dissociate as
HX → H+ + X-
The acid dissociation constant Ka, for the dissociation reaction is
Ka = [H+][X-]/[HX] ; at equilibrium, [H+] = [X-]
Ka = 3.405 × \(10^{-5}\)
A solution in which water serves as the solvent is called an aqueous solution. The most common way to represent it in chemical equations is to add (aq) to the appropriate chemical formula. For instance, the formula for a solution of table salt, or sodium chloride (NaCl), in water is Na+(aq) + Cl The word aqueous, which derives from the word aqua, means that something is connected to, resembles, or is dissolved in water. Water is a common solvent in chemistry because it is an excellent solvent and abundant in nature. Since water is frequently used as the experiment's solvent, unless otherwise stated, the term "solution" refers to an aqueous solution.
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Johann Becher's phlogiston hypothesis was falsifiable. True or False
Answers
Answer:
True
Explanation: