Answers
Answer:
there are three different subatomic particles inside them: the protons, neutrons, and electrons
Related Questions
An emission spectrum has a line in the blue region. How does this occur in the atom?
A. An electron ABSORBS a photon as it goes from a HIGHER TO LOWER energy level.
B. An electron EMITS a photon as it goes from a HIGHER TO LOWER energy level.
C. An electron EMITS a photon as it goes from a LOWER TO HIGHER energy level.
D. An electron ABSORBS a photon as it goes from a LOWER TO HIGHER energy level.
Answers
The correct response is B. An electron EMITS a photon as it goes from a HIGHER TO LOWER energy level.
What is electron?A subatomic particle with a negative electric charge is called an electron. Together with protons and neutrons, it is one of the fundamental particles that make up an atom.
When an atom is excited, its electrons have the ability to transition from one energy level to another. These stimulated electrons will eventually revert to their initial lower energy levels since they are unstable. They do this by releasing energy in the form of particular wavelength photons. Each element has a distinct set of energy levels, which leads to the emission of photons at a certain wavelength and the formation of a distinct emission spectrum.
In this instance, the existence of a line in the emission spectrum's blue section shows that an electron has released a photon with a certain wavelength that corresponds to the region's blue color. A photon with an energy equal to the difference between the two levels is released when an excited electron returns from a higher energy level to a lower energy level.
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A helium-filled balloon spontaneously deflates overnight as He atoms diffuse through the wall of the balloon. Describe the redistribution of matter and/or energy that accompanies this process.
Answers
When the helium atoms diffuse,, the atoms of the gaseous matter redistribute and energy is released in the process.
What is an atom?An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
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Choose which of the following are organic. (check all that apply) *
Carbohydrates
Lipids
COH
NaOH
O
Proteins
Answers
Answer:
The answer is A, B and E
Explanation:
A - carbohydrates
B - Lipids
C- COH
E - Proteins
all except O and NaOH
I need help pls this is very important
Answers
What would this mechanism look like?
Answers
Answer:
Not sure sorry :(
Explanation:
Alkenes undergo an addition reaction with borane in tetrahydrofuran (THF).
For the reaction below:
((image))
Draw the structure of the major organic product.
Use the wedge/hash bond tools to indicate stereochemistry.
Use wedge and hash bonds ONLY when needed to show reaction stereochemistry.
If the reaction produces a racemic mixture, just draw one stereoisomer.
Answers
Alkyne chemistry refers to the branch of chemistry that deals with triple bonds between carbon atoms. Due to the presence of pi-electrons that are not tightly bound, alkynes undergo addition reactions.
Alkynes have a triple bond, which makes it possible to add halogens, water, and other substances to them through an addition reaction. A series of steps are used to create addition goods. The development of addition products is caused by the stability of vinylic cations. Asymmetric alkynes must adhere to Markovnikov's rule in order to conduct addition reaction. Below are a few addition reactions of alkynes that are explained: Alkenes are created when alkynes react with dihydrogen in the presence of catalysts like Pt/Pd/Ni. Alkanes are created when the produced alkenes further react with dihydrogen.
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The density of an object is 5g/cm^3 and the volume of the object is 10 cm^3. What is the mass of the object
Answers
The mass of the object of density 5g/cm³ and volume 10 cm³ is 50kg.
What does physics mean when it refers to density?Defining density How tightly a material is packed together is determined by its density. Its definition is "mass per unit volume". D or, the symbol for density
Density Formula: = m/V,
where is the density, m is the object's mass, and V is its volume.
The units used change depending on the calculation's use of mass and volume units. Density would be expressed in kg/cm³ if the mass is expressed in kg and the volume in cm³.
Density = mass / volume
Mass = density × volume
Mass = 5×10
Mass = 50 kg.
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Which of the following is a characteristic of all chemical changes?A. A different state of matter is produced. B. Some mass is converted to energy. C.Some form of light is given off. D. A new material is formed
Answers
The history of atomic theory
Answers
Answer:
Atomic theory originated as a philosophical concept in ancient India and Greece. ... In the fifth century BCE, Democritus proposed that matter consists of indestructible, indivisible units called atoms. The Roman poet Lucretius recorded the idea, so it survived through the Dark Ages for later consideration.
Hope this is fine for youcan iodine dissolve in acetone
Answers
Answer:
no it wont dissolves
Explanation:
iodine will only dissolve in solvents that lack of polarity. acetone is a strongly polar solvent. therefore iodine would not disslove in acetone.
hope this helps!
A female spinach plant with flat (Ff) leaves is crossed with (pollination and fertilization occur) a male spinach plant with crinkly (ff) leaves. Explain what genes and traits the offspring will inherit. (Use the punnett square from your previous questions)
Your explanation should:
Identify the type of reproduction.
Compare the genetic variation among offspring (cause and effect)
Include a model to support your written response.
PLEASE HELP 100PTS
Answers
Answer:
the genes and traits of the offspring is a 50/50 chance.
Explanation:
The type of reproduction has 2 parents involved
Which of the following solutions would have the highest pH? Assume that they are all 0.10 M in acid at 25°C. The acid is followed by its Ka value.
a. HCHO2, 1.8 x 10-4
b. HF, 3.5 x 10-4
c. HClO2, 1.1 x 10-2
d. HCN, 4.9 x 10-10
e. HNO2, 4.6 x 10-4
Answers
Answer:
\(HCN~~Ka=4.9x10^-^1^0\)
Explanation:
In this case, we have to remember the relationship between the Ka value and the pH. We can use the general reaction for any acid with his Ka value expression:
\(HA~->~H^+~+~A^-\) \(Ka=\frac{[H^+][A^-]}{[HA]}\)
In the Ka expression, we have a proportional relationship between Ka and the concentration of \(H^+\). Therefore, if we have a higher Ka value we will have a smaller pH (lets keep in mind that with a higher
So, if we have to find the higher pH value we need to search the smaller Ka value in this case \(HCN~~Ka=4.9x10^-^1^0\).
I hope helps!
HCN has the highest pH among all the acids listed in the question.
The Ka is called the acid dissociation constant. It shows the extent to which an acid is ionized in water. The pH shows the hydrogen ion concentration of water. The higher the Ka, the higher the hydrogen ion concentration and the lower the pH.
Hence, HCN has the lowest Ka and the lowest hydrogen ion concentration. Therefore, HCN has the highest pH among all the acids listed in the question.
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A mixture of gases for the synthesis of ammonia with a mass of 1000.0 g at a temperature of 0 0C and pressure 2 atm occupies a volume of 1000.0 L.
1. Determine the volume fraction of gases in the mixture (in percent).
2. Write the equations for ammonia synthesis reactions in laboratories (3 methods).
3. Give the equation for the reaction of ammonia: a) with metal; b) with a non-metal; c) with metal oxide; d) with acid; e) with salt.
Answers
Answer:
1. or A. : .209%
B. : 1000.0 x .20
Explanation:
GIVING OUT BRAINLIEST
Which statement describes the energy that a longitudinal wave carries as its amplitude decreases?
It increases and is perpendicular to the motion of the wave.
It decreases and is perpendicular to the motion of the wave.
It increases and is parallel to the motion of the wave.
It decreases and is parallel to the motion of the wave.
Answers
Answer:
it increases and is perpendicular to the motion of the wave.
Therefore, the answer is:
It decreases and is parallel to the motion of the wave.
How many liters of water would you need to add to 4.36 moles of NaCl to create a 9.4 M solution?
Answers
Answer:
0.46 L
Explanation:
In order to solve this problem we need to keep in mind the following definition of molarity:
Molarity = Number of moles / litersWe now input the given number of moles and molarity:
9.4 M = 4.36 mol / litersAnd calculate how many liters are required:
liters = 4.36 mol / 9.4 Mliters = 0.46 Lwhat metals can be extracted from bauxite and haematite?
Answers
The haematite is a common iron oxide compound, so from it is extracted the Iron.
Bauxite contains Aluminum in its composition, so the Aluminum is extracted from it.
Strontium hydroxide reacts with hydrobromic acid to produce Strontium bromide and
water.
Write and balance the chemical reaction above, use it for problems 1-4 below:
1. If 5.50 moles of strontium hydroxide were consumed, how much moles of water are
produced?
2. Find the mass of hydrobromic acid used to produce 7.50 moles water.
3. If 10.8 g of strontium hydroxide were used, how much moles of strontium bromide are
produced?
4. If 13.3 g of hydrobromic acid were consumed, find the mass of the water produced.
Answers
Sr(OH)2 + 2 HCl --> SrCl2 + 2 H2O
To find the moles of water produced when 5.50 moles of strontium hydroxide are consumed, we need to apply the law of conservation of mass. The mass of water produced is equal to the mass of strontium hydroxide consumed. Since strontium hydroxide has a molar mass of 142 g/mol and water has a molar mass of 18 g/mol, 1 mol of strontium hydroxide can produce 9 mol of water. Therefore, 5.50 moles of strontium hydroxide can produce 49.5 mol of water.
Similarly, 7.50 moles of water can be produced by reacting 18 moles of hydrobromic acid with strontium hydroxide. Hydrobromic acid has a molar mass of 79.9 g/mol, so 18 moles of hydrobromic acid would have a mass of 79.9 * 18 = 1435.2 g.
To find the moles of strontium bromide produced when 10.8 g of strontium hydroxide is used, we need to apply the law of conservation of mass again. The mass of the strontium bromide produced is equal to the mass of strontium hydroxide consumed. Since strontium bromide has a molar mass of 410 g/mol and strontium hydroxide has a molar mass of 142 g/mol, 1 mol of strontium bromide can consume 3.23 moles of strontium hydroxide. Therefore, 10.8 g of strontium hydroxide can produce 10.8 / 3.23 = 3.34 moles of strontium bromide.
Finally, to find the mass of water produced when 13.3 g of hydrobromic acid is consumed, we need to apply the law of conservation of mass yet again. The mass of the water produced is equal to the mass of hydrobromic acid consumed. Since hydrobromic acid has a molar mass of 79.9 g/mol, 13.3 g of hydrobromic acid would produce 13.3 / 79.9 = 0.166 moles of water.
For the reaction: N₂(g) + 3H₂(g) + 2NH3(g) AH = -76.4 KJ/mol. Determine the heat energy when 5.0g of hydrogen burns.
Answers
Answer:
-191 kJ
Explanation:
The given reaction is:
N₂(g) + 3H₂(g) → 2NH₃(g) ΔH = -76.4 kJ/mol
From the balanced equation, we can see that the stoichiometric ratio between hydrogen (H₂) and ammonia (NH₃) is 3:2. This means that 3 moles of hydrogen react to produce 2 moles of ammonia.
To determine the heat energy when 5.0 g of hydrogen (H₂) burns, we need to follow these steps:
Step 1: Calculate the moles of hydrogen (H₂)
Using the molar mass of hydrogen (H₂), which is 2 g/mol, we can calculate the moles of hydrogen (H₂) in 5.0 g of hydrogen:
Moles of H₂ = Mass of H₂ / Molar mass of H₂
Moles of H₂ = 5.0 g / 2 g/mol
Moles of H₂ = 2.5 mol
Step 2: Use the stoichiometry of the reaction
Based on the stoichiometry of the reaction, we know that 3 moles of hydrogen (H₂) react to produce 2 moles of ammonia (NH₃), and the enthalpy change (ΔH) is -76.4 kJ/mol.
Step 3: Calculate the heat energy
The heat energy for 2.5 moles of hydrogen (H₂) can be calculated using the given enthalpy change (ΔH) and the stoichiometry of the reaction:
Heat energy = Moles of H₂ x ΔH
Heat energy = 2.5 mol x -76.4 kJ/mol
Heat energy = -191 kJ (rounded to three significant figures)
So, the heat energy when 5.0 g of hydrogen (H₂) burns is -191 kJ (rounded to three significant figures), and the negative sign indicates that the reaction is exothermic, releasing heat.
hybridization and it's effects
Answers
Explanation:
hybridization refers to the process of mixing atomic orbitals in a way that creates new hybrid orbitals. This is commonly observed in organic chemistry, where hybridization is used to explain the shapes and bonding properties of molecules.
The hybridization of atomic orbitals occurs when atoms bond to form molecules. In the hybridization process, the valence electrons of an atom are rearranged and redistributed in order to form new orbitals with different shapes and energies. This can result in stronger and more stable bonding between atoms.
The most common types of hybridization are sp, sp2, and sp3, which involve the mixing of s and p orbitals. For example, in the sp3 hybridization of carbon, the 2s orbital and three 2p orbitals are combined to form four sp3 hybrid orbitals, which are arranged in a tetrahedral shape.
The effects of hybridization in chemistry include changes in the bond angles, bond lengths, and overall shape of molecules. This can affect the reactivity and chemical properties of the molecule, such as its acidity or basicity.
CuI2 (light brown solid) name copper compounds
Answers
CuI2 is not a known compound. Copper compounds typically have different oxidation states for copper, resulting in various compound names.
Copper(II) oxide (CuO): It is a black solid compound where copper is in the +2 oxidation state. It is commonly used as a pigment and in catalytic reactions.
Copper(II) sulfate (CuSO4): It is a blue crystalline compound in which copper is in the +2 oxidation state. It is used in various applications such as agriculture, electroplating, and as a laboratory reagent.
Copper(I) oxide (Cu2O): It is a red crystalline compound in which copper is in the +1 oxidation state. It is used as a pigment, in solar cells, and as a catalyst.
Copper(II) chloride (CuCl2): It is a greenish-brown solid compound in which copper is in the +2 oxidation state. It is utilized in various chemical processes, including etching and catalyst synthesis.
Copper(II) nitrate (Cu(NO3)2): It is a blue crystalline compound where copper is in the +2 oxidation state. It is commonly used in the production of catalysts, as a coloring agent, and in electroplating.
These are just a few examples of copper compounds with different oxidation states and properties. It's important to note that the compound CuI2 mentioned in the question, if it exists, would be an exception to the typical nomenclature for copper compounds.
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Question 1
What is thermal energy
Answers
The term "thermal energy" refers to an object's internal energy that results from the movement of its constituent particles. The temperature of the item increases with the amount of kinetic energy these particles possess.
Heat is the thermal energy that is transferred between things when their temperatures differ. Temperature is a measurement of the average kinetic energy of the particles in a substance, and it is connected to the idea of thermal energy.
When two items with different temperatures come in touch with one another, thermal energy will go from the hotter to the cooler object until they achieve thermal equilibrium, when both objects are at the same temperature. Numerous branches of research and technology, such as thermodynamics, energy transmission, and materials science, all heavily rely on thermal energy.
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What is a sign that a chemical change has happened?
O A. A substance dissolves.
O B. Sound and heat are produced.
OC. A substance changes temperature.
O D. A change of state happens.
Answers
Some plants have fleshy stems and leaves that can store water. In which type of habitat would these adaptations be important
1- grassland
2- rainforest
3- mountain
4- desert
Answers
CAN SOMEONE HELP WITH THIS QUESTION?✨
IF A MIXTURE WEIGHTS 10.618 g and the mass of ammonium chloride in the mixture is found to be 0.942 g, WHAT IS THE PERCENT ammonium CHLORIDE IN THE MIXTURE?
Answers
The mixture contains 8.89% ammonium chloride.
Percent ammonium chloride = (mass of ammonium chloride / total weight of mixture) x 100
Percent ammonium chloride = (0.942 g / 10.618 g) x 100
Percent ammonium chloride = 8.89%
So, the mixture contains 8.89% ammonium chloride.
What is the amount?
The amount of substance (n) means the number of particles or elementary entities in a sample. It is also called the chemical amount. The unit for the amount of substance is the mole. An elementary entity is the smallest amount of a substance that can exist.
How do you find the percentage of a mixture in chemistry?
Find the molar mass of all the elements in the compound in grams per mole.Find the molecular mass of the entire compound.Divide the component's molar mass by the entire molecular mass.You will now have a number between 0 and 1. Multiply it by 100 to get the percent composition!To know more about percentage composition:
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In asexually reproducing organisms the DNA in the offspring and the parent is similar?
Answers
Answer:
asexual reproduction produces offspring with the same Gene's
Answer:
They are not just similar, they are identical.
Explanation:
Since there is only one parent, the parent copies ALL of its DNA and makes their offspring. So, the offspring and the parent have the same DNA
What are the purpose of a chemical equation check all that apply
Answers
Answer: (A,B,D) [1, 2, 4]
Explanation:
A 300.0 mL quantity of hydrogen is collected over water at 19.5 C and a total atmospheric pressure of 750. mm Hg. The partial pressure of water at this temperature is 17.0 mm Hg
Answers
The partial pressure of hydrogen in the collected gas sample is 733.0 mm Hg (calculated by subtracting the partial pressure of water, 17.0 mm Hg, from the total atmospheric pressure, 750.0 mm Hg).
When a gas is collected over water, the presence of water vapor affects the total pressure observed. In this case, the total atmospheric pressure is given as 750.0 mm Hg, and the partial pressure of water vapor at 19.5°C is 17.0 mm Hg.
To determine the partial pressure of hydrogen, we need to subtract the partial pressure of water vapor from the total atmospheric pressure. Partial pressure refers to the pressure exerted by an individual gas component in a mixture. In this scenario, the collected gas is primarily hydrogen, with water vapor being the other component.
By subtracting the partial pressure of water vapor (17.0 mm Hg) from the total atmospheric pressure (750.0 mm Hg), we can find the partial pressure of hydrogen:
Partial pressure of hydrogen = Total atmospheric pressure - Partial pressure of water vapor
Partial pressure of hydrogen = 750.0 mm Hg - 17.0 mm Hg
Partial pressure of hydrogen = 733.0 mm Hg
Therefore, the partial pressure of hydrogen in the collected gas sample is 733.0 mm Hg.
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The diagram below shows the branching tree diagram for humans. The text box below it shows the set of derived shared characteristics for the branching tree. A slanting, horizontal line is shown. On the extreme left, there is a label that says Common Ancestor. Along the slanting, horizontal line there are five dots labeled from left to right as 1, 2, 3, 4, and 5. There is one vertical line between each of the consecutive five dots. The lines are labeled from left to right as Perch, Frog, Pigeon, Rats, and Human. A text box below the branching tree diagram is labeled Derived Shared Characteristics. In the box it says from left to right, Terrestrial during all stages, Jaws, Walking on two legs, Mammary glands and hair, and Four limbs. Look at the possible derived shared characteristics, shown in the text box. Think about where these should be placed along the branching tree diagram. From the text box, select a shared derived characteristic that frogs and pigeons have. Explain why you think frogs and pigeons share this characteristic.
Answers
Based on the information provided, the shared derived characteristic that frogs and pigeons have is "Jaws."
Frogs and pigeons both belong to the vertebrate group and possess jaws. Jaws are bony structures that are essential for feeding and play a crucial role in the process of digestion. Frogs have well-developed jaws that allow them to catch and consume prey, while pigeons have a beak that serves as their modified jaw structure.
The branching tree diagram indicates that frogs and pigeons branch off at different points, suggesting that they have evolved independently from a common ancestor.
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Please help ASAP. Thanks so much!!!
Answers
The Keq for the reaction will be 0.89.
The concentration of CO2 Will be 1.67M.
How to calculate the valueThe equilibrium constant (Keq) for the reaction formulated as Keq = [H2O]^2 / ([H2]^2 [O2]), can be evaluated using the given concentrations of hydrogen and oxygen.
After applying both their respective quantities, we arrive at a calculated value of 0.89 for Keq. Moving on, to calculate the concentration of CO2 in the equation H2O (1) + CO2 (g) → H2CO3 (aq), where Keq = [H2CO3] / ([H2O] [CO₂]), having been supplied with a value of Keq equal to 0.15 and H2CO3 being at 0.25M, the rearranged expression reveals that [CO2] equals 1.67 M following basic algebraic substitution.
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How many molecules are in 38.4 moles of NF3?
Answers
Answer:3
Explanation:
I added and substituted for the garlic