Answer: Option (B) is the correct answer.
Explanation:
In a solid object, molecules are closely packed together due to strong intermolecular forces between them. So, when heat is provided to the object then forces between the atoms decreases and as a result, atoms start to move from their initial place.
Hence, atoms gain kinetic energy due to increase in their motion.
For example, when ice is heated it changes into liquid state of water.
Also, K.E = [tex]\frac{3}{2}kT[/tex]
where k = Boltzmann constant
T = temperature
Hence, kinetic energy is directly proportional to temperature.
Thus, we can conclude that the temperature of an object is directly related to the motion of its particles.
A molecule contains 24.36g of N and 62.64 g of Ag. What is its empirical formula
Answer:
AgN3
Explanation:
What device used to measure the heat transferred from one substance to another?
PLEASE HELP ME!?!?! What technology did scientists use in the mid-1900s to map the mid-ocean ridge
Which of the following elements is the most reactive?
Chlorine
Bromine
Fluorine
Helium
Answer:
Fluorine is the most reactive element in this list
Explanation:
The air in a cylinder of a diesel engine occupies 945 mL at 29oC and 1.00 atm. What is the pressure in the cylinder when the air is compressed to 67.5 mL and heats to 2000oC for an instant when the fuel explodes. What is the pressure of the gases in the cylinder at this instant before expansion occurs?
Classify these elements by whether they get oxidized or reduced in the reactions shown here: 2Ca(s)+ O 2 (g) F 2 (g)+2Li(s) → → 2CaO(s) 2LiF(s
Calcium and lithium are oxidized and Florine and oxygen are reduced.
What are oxidizing agent?Oxidizing agent are defined as a substance or component that participates in an oxidation-reduction reaction and receives electrons from a separate species. The oxidizing agent, often referred to as the electron acceptor, is typically in one of its higher oxidation states since it will receive electrons and be reduced.
Reducing agent are defined as a reactant in an oxidation-reduction reaction that decreases another reactant by discharging electrons to that reactant. Reducing one's consumption of energy-dense foods and canceling undesired magazine subscriptions are two examples. Another example of reduction is to turn off the water when brushing your teeth rather than letting it run the full two minutes.
Thus, calcium and lithium are oxidized and Florine and oxygen are reduced.
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How many grams of He are present in 8.0 L of gas at STP
What are ways that we can respond to eliminate an invasive species? Choose all that apply.
biological control by using other living organisms to rid of invasive species
chemical control by use of chemicals
sun control
physical control by physically removing the speicies
The ways by which we can respond to eliminate an invasive species can be of a biological control, or by any physical hindrance or chemical control.
What are invasive species?The organisms which are migrating to an area which is not its habitat but becoming threat to the organisms which are inhabitants there. These kind of organisms might destroy other small organisms or their resources of shelter and food.
The invasive species can be controlled by physical means such as putting some barriers or making some cages or related strategies to trap them. Other ways is that allotting other living organisms to get rid of the invasive species.
We can use some chemical controls as well, where the chemical used must be non-toxic and cause no more threat to nature. Therefore, except sun control, all other methods can be used.
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the gas left in an used aerosol can is at a pressure of 103 kPa at 25 degrees celsius if this can be thrown into fire what is the pressure of gas when it's temperature reaches 928 degrees Celsius
Answer:
415.11 kPa
Explanation:
The gas law to be applied here is Gay-Lussac's law. Gay-Lussac's law states that the pressure of a given mass of gas is directly proportional to it's temperature (in kelvin) provided volume remains constant.
The formula for the law is
P₁/T₁ = P₂/T₂
where P₁ is initial pressure (103 kPa)
P₂ is final pressure (unknown)
T₁ is initial temperature (25°C + 273 = 298K)
T₂ is final temperature (928°C + 273 = 1201K)
From the formula,
103/298 = P₂/1201
P₂ = [tex]\frac{103 * 1201}{298}[/tex]
P₂ = 415.11 kPa
415.11 kPa is the pressure of the gas when it temperature reaches 928°C.
Can you please answer number 8 thanks
Which is most likely to dissolve fastest in water? A. sugar cube B. powdered sugar
The powered sugar will easily dissolve in water than the sugar cube. Because, as the surface area of the substance increases, the more they can interact with water and dissolve easily.
What is solubility ?Solubility of a substance is the fraction of its concentration that can be dissolved in a particular solvent at a specified temperature. Solubility of a substance depends on the bond type, molecular mass, temperature, pressure etc.
As the surface area of the solute increases, its solubility in a solvent also increases. Its because, as the surface area increases, the substance is more exposed to the solvent.
The powdered sugar have the higher surface area and it easily interact with water , which can be fastly dissolved in water than a sugar cube do. The inner part of the cube is not get wet and it takes time to dissolve.
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6.24 x 10^24 atoms Na to moles Na
How many moles of Ca(OH)2 are in 3.5kg of Ca(OH)2? Answer in units of mole
Answer:
47.3 moles of [tex]Ca(OH)_2[/tex] are in 3.5 kilograms of [tex]Ca(OH)_2[/tex].
Explanation:
[tex]n=\frac{m}{M}[/tex]
Where:
n = Moles of the compound
m= Given mass of the compound
M = Molar mass of the compound
Mass of the calcium hydroxide, m = 3.5 kg = 3500 g (1kg = 1000 g)
Molar mass of the calcium hydroxide = M = 74 g/mol
Moles of calcium hydroxide = n
[tex]n=\frac{3500 g}{74 g/mol}=47.297 mol\approx 47.3 mol[/tex]
47.3 moles of [tex]Ca(OH)_2[/tex] are in 3.5 kilograms of [tex]Ca(OH)_2[/tex].
Which is the largest atom? A. Bromine (Br) B. Chlorine (Cl) C. Iodine (I) D. Fluorine (F)
which of these are the largest? asteroids, comets, meteors, or are they all the same size?
Answer:
most likly comets but could be asteroids
Explanation:
hope it helps sorry the there wrong depeest apologise thanks
Solar Nebula definition
The solar nebula is the original rotating cloud of gas and dust that formed the solar system, which under its gravity collapsed to form the Sun at its center, with the remaining materials eventually forming the planets and other celestial bodies.
Explanation:Definition of Solar Nebula
The term solar nebula refers to the vast, rotating cloud of gas and dust from which the solar system was formed about 4.5 billion years ago. This flattened cloud of cosmic raw material is the precursor to the sun and the planets in our solar system. As gravity caused the solar nebula to collapse, it became hotter and denser at its center, forming the Sun. The remaining material then coalesced into the planets, moons, and other bodies that orbit the Sun. Similarly, the Orion Nebula is a current example of a stellar nursery, where new stars and planets are being formed, likened to a contemporary analog of our own early solar nebula. Unlike the solar nebula which has completed its lifecycle, many young stellar nebulas or circumstellar disks can be observed today, reflecting various stages in the planetary formation process.
which organelle converts the chemical energy stored in food into compounds that are more convenient for the cell to use?
Answer:
Mithocondria
Explanation:
Mitochondrias are cellular organelles responsible for supplying most of the energy necessary for cellular activity. They synthesize ATP from nutrients such as glucose, fatty acids and amino acids.
ATP (adenosine triphosphate) is the main source of energy for most cellular functions. It is composed of a nitrogenous base attached a pentose type sugar and three phosphate groups.
Explain why the following statements are true:
1) All matter is made up of atoms.
2) An electron with a proton equals a neutral charge.
3) All atoms are in constant motion.
please explain using complete sentences and will give brainliest to the best answer
PLEASE EXPLAIN ALL OF THE CHOICES!!!!! THX
Explain why the following statements are true:
1) All matter is made up of atoms.
2) An electron with a proton equals a neutral charge.
3) All atoms are in constant motion.
please explain using complete sentences
A What does the data tell us? Using the storm data and the computer model, check all statements that are true.
B The majority of hurricanes originate around the equator.
C A valid hypothesis for the research would be: As sea surface temperatures increase hurricane intensity.
D Although the number of hurricanes in the West Pacific Ocean has declined over the years, the intensity of the hurricanes has increased.
E According to the scientists' future projections, the frequency of hurricanes will increase throughout the world.
It has to be more than 1 i thank it has to be 2 or 3 please help me someone thank you:)
It's A, B, and D. This question was also in my homework.
Planetesimal definition
If 1.98 moles of C are reacted with an excess of Cu2O how many moles of CO would be produced? moles
Using the balanced chemical equation 2C + Cu2O → 2CO + 2Cu, it can be determined that 1.98 moles of carbon will produce 1.98 moles of carbon monoxide (CO) when reacting with an excess of copper(I) oxide.
Explanation:The subject of this question is Chemistry, specifically dealing with stoichiometry which involves the calculation of the amounts of reactants and products in chemical reactions. Given that 1.98 moles of carbon (C) react with an excess of copper(I) oxide (Cu2O), we need to know the balanced chemical equation to find the amount of carbon monoxide (CO) produced.
The chemical equation for the reaction between carbon and copper(I) oxide to produce carbon monoxide and copper would be:
2C + Cu2O → 2CO + 2Cu
From this balanced equation, we can see that 2 moles of carbon react with 1 mole of copper(I) oxide to produce 2 moles of carbon monoxide. Therefore, if we start with 1.98 moles of carbon, we will also produce 1.98 moles of CO, since the ratio of carbon to carbon monoxide is 1:1.
When 1.98 moles of C are reacted with an excess of Cu2O, it would produce 1.98 moles of CO assuming the reaction follows the stoichiometry of 2 moles of C producing 2 moles of CO.
Explanation:If 1.98 moles of C are reacted with an excess of Cu2O, the number of moles of CO produced can be determined by using stoichiometry and the balanced chemical equation for the reaction. Unfortunately, the actual balanced chemical equation is not provided in the question. However, a typical reaction between carbon and copper (I) oxide might look like this:
2C(s) + Cu2O(s) → 2CO(g) + Cu(s)
According to this balanced equation, 2 moles of carbon react with 1 mole of copper(I) oxide to produce 2 moles of carbon monoxide. Therefore, if we have 1.98 moles of carbon, it would produce 1.98 moles of CO, assuming carbon is the limiting reactant and since there's an excess of Cu2O.
How many atoms are in 5.03 moles of silicon dioxide
How many atoms are In B2H4
Which statement describes the valence electrons in metallic bonds?
Answer:
They are shared among many atoms.
Explanation:
In metallic bonds, the valence electrons of interacting metal atoms from s and p orbitals are delocalized. Therefore, instead of revolving their respective metal atoms they form a sea of electrons.
Therefore, the positively charged atomic nuclei of the interacting metal ions gets surrounded by this sea of electrons.
Hence, we can conclude that the valence electrons in metallic bonds are shared among many atoms.
Final answer:
Valence electrons in metallic bonds are delocalized, allowing them to move freely and contribute to properties like conductivity and malleability. The metallic bond consists of the attraction between cations and a 'sea of electrons,' resulting in varying strengths and melting points for different metals.
Explanation:
The valence electrons in metallic bonds are delocalized, which means that they do not belong to any one atom but are free to move about the entire metal structure. The metallic bond is characterized by an electrostatic attraction between the positively charged nuclei, known as cations, and these free-moving, or delocalized, valence electrons. This forms a 'sea of electrons' that is responsible for many properties of metals such as conductivity, malleability, and ductility.
In solid metals, these valence electrons can move relatively easily throughout the crystalline lattice, forming an attraction with positive ions. The strength of these bonds varies, but typically metallic bonds are weaker than ionic or covalent bonds, with dissociation energies ranging from 1 to 3 eV. Some metals have very high melting points and are hard, while others are softer and have lower melting points, primarily depending on the number of delocalized electrons.
A 1.0 mole sample of HNO3 is added to water. The final volume of the solution is 1.5 L. Calculate the pH of the Solution
The pH of the solution is 1.12.
HNO₃ is a strong acid, which means it completely dissociates in water to form H⁺ and NO₃- ions.
The number of moles of HNO₃ added is 1.0 mole.
The final volume of the solution is 1.5 L, so the concentration of HNO₃ can be calculated as:
[HNO₃] = number of moles / volume (in liters) = 1.0 mole / 1.5 L = 0.67 M
Since HNO₃ is a strong acid, it completely dissociates to form H+ ions. Therefore, the concentration of H⁺ ions is equal to the concentration of HNO₃:
[H⁺] = [HNO₃] = 0.67 M
Now, we can calculate the pH using the following equation:
pH = -log[H⁺] = -log(0.67) = 1.12
Therefore, the pH of the solution is 1.12.
1.the water on the surface of the earth
2. a solution that will conduct an electric current
3. process used by plants to make simple sugars and starches
4. process used to produce fresh water from saline
photosynthesis
desalination
hydropshere
electrolyte
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Why is it not a good idea to use a stopper when combining two unknown substances in test?
How does the potential energy of an object change as its distance from the ground changes?
The force that slows down and eventually stops a ball you roll across the pavement is called A) kinetic force. B) friction force. C) the slow force. D) potential force.
The ball stops moving because of friction force. Friction is the force that opposes all motion. Therefore, the answer is friction force...
Answer:
friction
Explanation:
took test