The grams of NaCl that needed to make 1L of a 0.1 M solution is
5.845 g (answer C)
calculation
Step 1: find the moles of NaCl
moles = molarity x volume in liters
molarity = 0.1 M =0.1 mol/l
= 1 L x 0.1 Mol/L = 0.1 moles
Step 2: find the mass NaCl
mass = moles x molar mass
From periodic table the molar mass of NaCl = 23 +35.45 =58.45 g/mol
mass= 0.1 moles x 58.45 g/mol =5.845 g appropriate ( answer C)
To calculate the number of grams of NaCl that would be needed to make 0.1 M of solution we have to calculate;
The molecular weight of sodium chloride (NaCl) which is 58.44 g, so one gram molecular weight will be= 1 mole which is 58.44 g.By dissolving 58.44 g of NaCl upto the final volume of 1 litre, one can get 1 M NaCl solution.So, to make 0.1 M NaCl solution we have to dilute the mass of salt to 1000 ml of solution as follows;0.1 M NaCl solution will require 0.1 x 58.44 g of NaCl = 5.844 g. of NaCl.A substance in the solid phase (state) of matter has
A.a definite shape and a definite volume
B.a definite shape,but no definite volume
C.No definite shape,but a definite volume
D.no definite shape and no definite volume
A substance in the solid phase (state) of matter has a definite shape and a definite volume.
What is volume?Volume is the amount of space taken up by an object, while capacity is the measure of an object's ability to hold a substance, like a solid, a liquid or a gas. Volume is measured in cubic units, while capacity can be measured in almost every other unit, including litres, gallons, pounds, etc.
Matter in the solid-state maintains a fixed volume and shape, with component particles (atoms, molecules or ions) close together and fixed into place.
Hence, option A is correct.
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Ascorbic acid, or vitamin C (C6H8O6, molar mass = 176 g/mol), is a naturally occurring organic compound with antioxidant properties. A healthy adult’s daily requirement of vitamin C is 70-90 mg. A sweet lime contains 2.88×10−4 mol of ascorbic acid. To determine whether the ascorbic acid in a sweet lime meets the daily requirement, calculate the mass of ascorbic acid in 2.88×10−4 mol of ascorbic acid.
Answer:
5.07×10^-2
Explanation:
in case they want it to be written out instead of the plain answer
How many milliliters of C5H8 can be made from 366 mL C5H12 ?
density of C5H12 = 0.620 g/mL
density of C5H8 = 0.681 g/mL
density of H2= 0.0899g/L
Please explain
The number of Ml of C₅H₈ that can be made from 366 ml C₅H₁₂ is 314.7 ml of C₅H₈
calculation
step 1: write the equation for formation of C₅H₈
C₅H₁₂ → C₅H₈ + 2 H₂
Step 2: find the mass of C₅H₁₂
mass = density × volume
= 0.620 g/ml × 366 ml =226.92 g
Step 3: find moles Of C₅H₁₂
moles = mass÷ molar mass
from periodic table the molar mass of C₅H₁₂ = (12 x5) +( 1 x12) = 72 g/mol
moles = 226.92 g÷ 72 g/mol =3.152 moles
Step 4: use the mole ratio to determine the moles of C₅H₈
C₅H₁₂:C₅H₈ is 1:1 from equation above
Therefore the moles of C₅H₈ is also = 3.152 moles
Step 5: find the mass of C₅H₈
mass = moles x molar mass
from periodic table the molar mass of C₅H₈ = (12 x5) +( 1 x8) = 68 g/mol
= 3.152 moles x 68 g/mol = 214.34 g
Step 6: find Ml of C₅H₈
=mass / density
= 214.34 g/0.681 g/ml = 314.7 ml
You can produce approximately 2.144 mL of C₅H₈ from 366 mL of C₅H₁₂.
This is calculated through conversion of mass using densities of the two substances.
The assumption is a 1:1 molar conversion for simplicity.To find out how many milliliters of C₅H₈ can be made from 366 mL of C₅H₁₂, you need to follow these steps:
First, determine the mass of C₅H₁₂ using its volume and density. Mass (C₅H₁₂) = Volume × Density Mass = 366 mL × 0.620 g/mL = 226.92 gAssume a 1:1 molar conversion between C₅H₁₂ and C₅H₈, given that they have similar formulas, C₅H₁₂ → C₅H₈ + H₂ The density of C₅H₈ is given, so you use it to convert the mass back to volume. Volume (C₅H₈) = [tex]\frac{mass}{density}[/tex]Volume = [tex]\frac{226.92 g}{0.681 ml}[/tex] = 2.144 mLTherefore, you can produce approximately 2.144 mL of C₅H₈ from 366 mL of C₅H₁₂.
Correct question is: How many milliliters of C₅H₈ can be made from 366 mL C₅H₁₂ ?
density of C₅H₁₂ = 0.620 g/mL
density of C₅H₈ = 0.681 g/mL
density of H₂ = 0.0899g/L
What is the relationship between diatomic molecules and diatomic elements? Name One example of a diatomic element.
Answer:
Diatomic molecules are molecules made of two atoms. The atoms can be of the same element (diatomic elements) like in H2, N2, and O2, or of different elements (diatomic compounds) like in HCl, NaCl, and KBr.
In contrast, monatomic elements consist of single atoms, like Ar, He and Ne.
how does the structure of covalent bond affect the structure of covalent compounds
A covalent bond holds two atoms close together because electrons in their outermost orbitals are shared by both atoms.
There are two types of chemical compound one is covalent compound and another is ionic compound in chemistry. Therefore, a covalent bond holds two atoms close together because electrons in their outermost orbitals are shared by both atoms.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
Covalent compounds are formed by covalent bond and ionic compounds are formed by ionic bond. Covalent bond is formed by sharing of electron and ionic bond are formed by complete transfer of electron. Ionic bonds are stronger than covalent bonds.
The melting and boiling points are higher in ionic compounds. A covalent bond holds two atoms close together because electrons in their outermost orbitals are shared by both atoms.
Therefore, a covalent bond holds two atoms close together because electrons in their outermost orbitals are shared by both atoms.
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I NEED HELP ASAP PLEASE
Which of the following represents the average kinetic energy of an object’s particles?
Potential energy
Thermal energy
Type of atoms in matter
Type of molecules in matter
I belive it is thermal energy...
Answer:
The Correct Answer is B
Thermal energy
Explanation:
2 H2 + O2 → 2 H2O What is the product of this chemical reaction
The product of the chemical reaction 2 H₂ + O₂ → 2 H₂O is water (H₂O), which is a result of two moles of hydrogen reacting with one mole of oxygen.
Explanation:The product of the chemical reaction 2 H₂ + O₂ → 2 H₂O is water (H₂O). This represents a composition reaction where two molecules of hydrogen gas (H₂) react with one molecule of oxygen gas (O₂) to produce two molecules of water (H₂O). A key point to remember is that balanced chemical equations reflect not only the molecular count but also the molar amounts of the substances involved. Hence, we can say that two moles of hydrogen react with one mole of oxygen to yield two moles of water.
Differentiate crystalline and amorphous solid
Crystalline solids have a highly ordered, regular structure and distinct melting points. Amorphous solids have randomly arranged particles and melt over a range of temperatures. They're both used extensively in technology.
Explanation:The primary difference between crystalline and amorphous solids lies in their internal atomic structure. Crystalline solids have their atoms, ions, or molecules arranged in a regular, repeating pattern, forming a lattice. They also have distinct melting temperatures due to the identical attractions their particles experience. Examples of crystalline solids include ionic solids, metallic solids, covalent network solids, and molecular solids.
On the other hand, amorphous solids do not have a well-ordered internal structure. Their particles are arranged randomly, and they soften and melt over a range of temperatures due to the range of interactions their particles experience. Examples of amorphous solids include glasses and certain plastics.
Both types of solids are used extensively in technology, like the silicon crystals in computer chips (a crystalline solid) or the glass in a smartphone screen (an amorphous solid).
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0.820 L has a mass of 2.56kg what is the density of this liquid in kg/L
Density ρ=[tex]\frac{m}{v}[/tex]
=[tex]\frac{2.56 kg}{0.820 L} \\=3.121kg/L[/tex]
At catalyst is ______.
A. The product of a combustion reaction
B. Not used up in a reaction
C. One of the reactants in single-replacement reactions
D. A solid product of a reaction
Answer:
The answer A.The product of a combustion reaction
Explanation:
A catalyst is the substance which helps in increasing the rate of a reaction without itself getting consumed in the reaction.
A catalyst changes the path of reaction so that molecules with lower energy can easily participate in the reaction. As a result, formation of products increases.
Thus, we can conclude that out of the given options, a catalyst is not used up in a reaction.
PLS HELP
what is the charge of the nucleus? AND HOW DO YOU KNOW?
it’s all the same color with no labels so how do you know if it’s neutrons or protons
The compound 1-butene is modeled here. What would need to happen for molecules of this compound to transform into polybutene? A. Covalent bonds would need to form between the molecules. B. Each molecule would need to gain at least one oxygen atom. C. More double bonds would need to form in each molecule. D. Hydrogen atoms would need to be transferred between molecules.
Answer:
A.
Covalent bonds would need to form between the molecules.
Explanation:
From edmentum
According to the polymerization reactions ,1-butene is transformed to polybutene by formation of more covalent bonds between the molecules.
What are polymerization reactions?The reactions in which large number of monomer molecules react to form polymer are called polymerization reactions.The large molecules which are produced from polymerization may have linear or branched structure.
They can also form a complex three dimensional structure . There are different polymerization reactions like step-growth polymerization, chain -growth polymerization and condensation polymerization.
Polymers containing same kind of monomer are homopolymer and which contain different monomers are heteropolymers. Mechanisms which describe formation of polymers are of different types such as free radical mechanism and chain growth mechanisms.
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An atom has atomic number 11 and mass number 23. How many electrons does the atom have?
Answer:
11
Explanation:
the atomic number is the same as the number of electrons
how are cells, tissues, and organs related?
Cells are considered the fundamental units of life. The cells in complex multicellular organisms like people are organized into tissues, groups of similar cells that work together on a specific task. ... At each level of organization—cells, tissues, organs, and organ systems—structure is closely related to function.
Cells are the basic units of life that join together to form tissues, which in turn combine to form organs. These organs, working together, form organ systems and eventually, an organism. Understanding the relationships between cells, tissues, and organs is fundamental in studying biological structures.
Explanation:Cells, tissues, and organs are closely related, as they form the building blocks of all organisms. Cells are the smallest unit of life, and in multicellular organisms, these cells of a similar kind interconnect with each other and perform shared functions to form tissues (for example, muscle tissue, connective tissue, and nervous tissue). Then, several tissues combine together to form an organ (like the heart, brain, or stomach) that carries out a specific function.
Organ systems, such as the circulatory or digestive system, are made up of several organs working in unison. These organ systems functioning together form an organism, like a human or an elephant. Understanding the structure and function of cells helps in the study of tissues, and similarly, understanding tissues aids in comprehending how organs function.
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Investigating a fire scene, you determine several places where fires started. What might you guess about the cause of the fire?
A. It was an electrical fire
B.It was deliberately set
C. An accelerant was used
D. It was an accident
Answer:
B. It was deliberately set!
Explanation:
Just took the test and it was right!
What was Johann Dobereiner’s contribution to the development of the periodic table?
He arranged the elements according to increasing atomic mass.
He arranged the elements according to increasing atomic number.
He identified triads of elements that had similar properties.
He organized elements into four groups based on their properties.
He discovered what became known as Dobereiner's triads. For example he noticed that the average of the atomic mass of lithium and potassium was close to the atomic mass of sodium and they had similar properties.
The third choice is the correct one.
Answer:
He identified triads of elements that had similar properties.
Explanation:
He identified a group of there elements that have relatable physical properties such their atomic weight and density. For example in alkali metals such as lithium, sodium and potassium, the atomic weight of sodium is the arithmetic mean of the first and the third element. The same trend was observed with alkaline earth metals (calcium, strontium and barium), halogen (chlorine, bromine and iodine) and chalcogens (sulphur, selenium and tellurium).
Calculate the energy of a photon of blue light with a wavelength of 4.75 x 10 ^-7 m
480 nm
Explanation:
The key to any frequency and wavelength problem is the fact that frequency and wavelength have an inverse relationship described by the equation
What is the molar mass of 3.45 moles of NO2
I Believe it would be 46.005500
hoped this helped let me know if I'm wrong
Answer: The mass of nitrogen dioxide for given number of moles are 158.7 grams.
Explanation:
To calculate the mass for given number of moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]
We are given:
Moles of nitrogen dioxide = 3.45 moles
Molar mass of nitrogen dioxide = [tex][14+(2\times 16)]=46g/mol[/tex]
Putting values in above equation, we get:
[tex]3.45mol=\frac{\text{Mass of }NO_2}{46g/mol}\\\\\text{Mass of }NO_2=(3.45mol\times 46g/mol)=158.7g[/tex]
Hence, the mass of nitrogen dioxide for given number of moles are 158.7 grams.
They lymphatic system’s function is to --------.
A) Transport fluid
B) Breathe
C) Digest food
D) Remove waste.
The correct answer is option A, that is, transport fluid.
The lymphatic system refers to a network of organs and tissues, which helps in getting rid of the body wastes, toxins, and other undesired elements. However, the main activity of the lymphatic system is to transport lymph, that is, a fluid comprising infection-fighting white blood cells, all through the body.
The lymphatic system mainly comprises of lymphatic vessels that are identical to the circulatory system's capillaries and veins. The vessels are associated with lymph nodes, where the filtration of lymph is done. The adenoids, tonsils, thymus, and spleen are all the components of the lymphatic system.
determine the iupac name
Answer:
1-chloro-3-ethyl-2,2-dimethylheptane
Step-by-step explanation:
Here are the rules for naming alkyl halides.
1. Find the longest continuous chain of carbon atoms (see image below).
There are two different seven-carbon chains.
2. If two or more chains are competing for selection as the main chain, select the one that has more substituents.
We choose the chain marked by the blue line .
3. Name the main chain.
The chain has seven C atoms, so its base name is heptane.
4. Identify and name all the substituents.
There are one Cl atom (chloro), two 1C groups (methyl), and one 2C group(ethyl)
5. Number the main chain from the end closest to a substituent.
The C bearing the Cl atom becomes C-1.
5. Identify the substituents by the number of the C atom on the main chain (the locant). Use hyphens between letters and numbers (1-chloro, 2-methyl, 3-ethyl).
6. If there are two or more identical substituents, give the locant for each and use a multiplying prefix. Use commas between two numbers (2,2-dimethyl).
7. Put the names of the substituents with their locants in alphabetical order in front of the base name with no spaces.
The IUPAC name is 1-chloro-3-ethyl-2,2-dimethylheptane.
If a cube is split in half, the surface area of the pieces will be ___ that of the cube.
A. greater than
B. less than
C. the same as
D. none of these
If we are talking about BOTH the pieces surface areas the answer would be A. Greater than. This is because a split cube has an extra side on each piece that the original cube didn't have.
I hope that helps!!
If a cube is split in half, the surface area of the pieces will be greater than that of the cube.
If a cube is split in half, the surface area of the pieces will be greater than that of the cube. This is because when you cut the cube, you are adding two more faces (the cut faces), which increases the total surface area. Let's explore an example using a cube of side length 2 units:
Original cube surface area = 6 faces imes (2 units imes 2 units) = 24 square units.
When split, each half has 5 faces of 4 square units (original cube's faces) and 1 new face of 4 square units (from the cut), totaling 6 faces.
So, each half has a surface area of 6 faces imes 4 square units = 24 square units.
For both halves combined: 24 square units + 24 square units = 48 square units.
Comparing the original cube's surface area (24 square units) with the combined surface area of the two halves (48 square units), we can conclude that the surface area is increased after cutting the cube.
in which group of the periodic table do you find alkali metals?
A. 8A
B.2A
C.1A
D.7A
c, 1A hope this helps
Answer:C
Explanation:
Alkali metals are those elements found in group 1A. They are the very first elements one encounters at the extreme left hand side of the periodic tab!e. They are extremely reactive and are the most electro positive of all the metals. They include; Li, Na, K Rb, Cs, Fr.
Write formulas for the binary ionic compounds formed between the following elements: a. Potassium and iodine b. Magnesium and chlorine c. Sodium and sulfur d. Aluminum and sulfur e. Aluminum and nitrogen
The ions are made up of atoms with an overall positive or negative charge as a result of electron gain or loss.
The formulas for various binary ionic compounds are what we wish to write down. To do this, we must take into account the octet's rule.
According to the octet's rule, atoms will either gain, lose, or share electrons to have the electron configuration of the nearby noble gas (8 valence electrons except for He with 2).
Potassium and iodine - KIK will lose 1 electron to create K+ since it possesses 1 valence electron. I will gain 1 electron to produce I because it already has 7 valence electrons. KI is the neutral chemical that exists between K+ and I.
Magnesium and chlorine - [tex]MgCL_{2}[/tex]As Mg has two valence electrons, it must lose two of them to become [tex]Mg^{+2}[/tex] Cl and will gain 1 electron to produce Cl because it already has 7 valence electrons. [tex]MgCl_{2}[/tex] is the neutral molecule between [tex]Mg^{+2}[/tex] and [tex]Cl^{-}[/tex].
Sodium and sulfur - [tex]NA_{2}S[/tex]Na will lose 1 electron to produce [tex]Na^{+}[/tex] since it possesses 1 valence electron. S will gain 2 electrons to create [tex]S^{-2}[/tex]because it has 6 valence electrons. [tex]Na^{2}S[/tex] is the neutral molecule that exists between [tex]Na^{+}[/tex]+ and [tex]S^{-2}[/tex].
Aluminum and sulfur - [tex]Al^{2}S^{3}[/tex]Al will lose 3 electrons to create [tex]Al^{3+}[/tex] since it possesses 3 valence electrons. S will gain 2 electrons to create [tex]S^{-2}[/tex] because it has 6 valence electrons. [tex]Al^{2}S^{3}[/tex] is the neutral molecule that exists between [tex]Al^{3+}[/tex]and [tex]S^{-2}[/tex].
Aluminum and nitrogen - [tex]AlN[/tex]Al will lose 3 electrons to create[tex]Al^{3+}[/tex] since it possesses 3 valence electrons. N will gain 3 electrons to become [tex]N^{3-}[/tex] because it has 5 valence electrons. [tex]AlN[/tex] is the neutral intermediate between [tex]Al^{3+}[/tex] and [tex]N^{3-}[/tex].
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The formulas for the binary ionic compounds are as follows: Potassium and iodine - KI, Magnesium and chlorine - MgCl2, Sodium and sulfur - Na2S, Aluminum and sulfur - Al2S3, Aluminum and nitrogen - AlN.
Explanation:The formulas for binary ionic compounds formed between the given elements are as follows:
Potassium and iodine: When these two elements form a binary ionic compound, the outcome is Potassium iodide. The formula for this is KI. Magnesium and chlorine: The binary ionic compound resulting from Magnesium and Chlorine interaction is Magnesium chloride, represented as MgCl2. Sodium and sulfur: The combination of Sodium and Sulfur results in Sodium sulfide. This is abbreviated as Na2S. Aluminum and sulfur: When Aluminum and sulfur join to form a binary ionic compound, the result is Aluminum sulfide, written as Al2S3. Aluminum and nitrogen: The binary ionic compound formed by Aluminum and Nitrogen is Aluminum Nitride. Its formula is AlN.
Remember that in these compounds, the metal (on the left in the periodic table) loses electrons to become a positive ion, and the non-metal (on the right in the periodic table) gains these electrons to form a negative ion. The compounds are therefore electrically neutral as a whole.
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How many molecules of isopently acetate C7H1402 are released (1x10^ -6g) in a typical bee sting
The number of molecules of isopently acetate is 4.63 x 10¹⁵ molecules
calculation
Step 1: find the moles of isopently acetate( C₇H₁₄O₂)
moles = mass÷ molar mass
From periodic table the molar mass of C₇H₁₄O₂
= (12 x7 ) + (1 x14) +(16 x2) =130 g/mol
moles = 1 x10⁻⁶ g÷ 130 g/mol = 7 x 10⁻⁹ moles
step 2 ; use the Avogadro's law constant to calculate the number of molecules
That is according to Avogadro's law 1 mole = 6.02 x 10²³ molecules
7 x 10⁻⁹ moles = ? molecules
by cross multiplication
= { (7 x 10⁻⁹ moles x 6.02 x10²³ molecules) / 1 mole} = 4.63 x 10¹⁵ molecules
To determine the number of molecules of isoamyl acetate in a 1x10⁻⁶g bee sting, calculate the molar mass, convert mass to moles, and multiply by Avogadro's number to find approximately 4.625x10¹⁵ molecules.
To determine how many molecules of isoamyl acetate (isopentyl acetate) C₇H₁₄O₂ are released in 1x10⁻⁶g during a typical bee sting, we first need to calculate the molar mass of C₇H₁₄O₂. The molar mass is given by the sum of the atomic masses of all the atoms in one molecule of the substance. This is calculated as:
7 carbons (C) times 12.01 g/mol = 84.07 g/mol
14 hydrogens (H) times 1.008 g/mol = 14.112 g/mol
2 oxygens (O) times 16.00 g/mol = 32.00 g/mol
Adding these together gives a molar mass of 130.182 g/mol for isoamyl acetate.
Next, we use the following formula to convert the mass of the substance to moles:
moles = mass (g) / molar mass (g/mol)
= 1x10⁻⁶g / 130.182 g/mol
moles = 7.68x10⁻⁹ moles of C₇H₁₄O₂.
Finally, to find the number of molecules, we multiply the moles of the substance by Avogadro's number (6.022x10²³ molecules/mol):
number of molecules = 7.68x10⁻⁹ moles x 6.022x10²³ molecules/mol
number of molecules = 4.625x10¹⁵ molecules of C₇H₁₄O₂.
The number of molecules of isoamyl acetate released in 1x10⁻⁶g during a typical bee sting is approximately 4.625x10¹⁵.
Which type of electromagnetic radiation has a lower frequency than infared radiation
Identify the reactant and product in tge following chemical reaction: CH4 + 2O2 ➡ CO2 + 2H2O
In the reaction CH₄ + 2O₂ → CO₂ + 2H₂O, methane (CH₄) and oxygen (O₂) are the reactants, and carbon dioxide (CO₂) and water (H₂O) are the products. The number of molecules involved is indicated by the numbers in front of the chemical symbols.
In the chemical reaction CH₄ + 2O₂ ightarrow CO₂ + 2H₂O, the reactants are methane (CH₄) and oxygen (O₂), and the products are carbon dioxide (CO₂) and water (H₂O). The arrow signifies the direction in which the reaction proceeds, with the substances on the left side of the arrow being the reactants and the ones on the right side being the products. No reverse arrow is used, indicating the reaction is shown as proceeding in only one direction. The number '2' in front of O₂ and H₂O tells us that there are two molecules of oxygen and two molecules of water involved in the reaction, whereas no number in front of CH₄ and CO₂ indicates only one molecule of each is involved.
It is important to confirm new scientific findings through _______ that produce _______. This is how scientists know that new findings are reliable and can be accepted.
The confirmation of new scientific findings is achieved through repeated experiments that yield consistent results. This process is central to the scientific method and ensures the reliability of scientific discoveries.
Explanation:It is important to confirm new scientific findings through repeated experiments that produce consistent results. This concept is at the heart of scientific method, a systematic approach to inquiry that aims to minimize of bias and maximize the reliability of findings. Repeating experiments helps to ensure that findings are not due to random chance, experimental errors, or biases. By producing consistent results, we increase the confidence that the findings accurately represent what they are intended to measure, making them more reliable. Thus, replication and reliability are crucial for scientific progress.
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Answer:
Explanation:
multiple investigations; consistent results
What kind of bond is present in HCl
Answer:
ionic
Explanation:
which one of these reactions is energy released? A all reactions B no reactions C endothermic reactions D exothermic reactions
The reaction that is energy released is exothermic reactions (answer D)
Explanation
Exothermic reaction is a chemical reaction that releases energy through heat or light.
Example of exothermic reaction is combustion reaction such as lighting a candle which produces carbon dioxide, water and heat.
Endothermic reaction in other hand it is a chemical reaction that absorb energy from the surrounding.
Compare photons and electrons. Which of the following statements is true?
Photons are units or packets of electromagnetic energy. They carry no charge or mass.
While, electrons are constituents of an atom that are negatively charged and associated with a certain mass. In fact, electrons in an atom can get excited when they absorb photons of characteristic energy from electromagnetic radiation.
The similarity between photons and electrons is that both can behave as particles as well as waves.
Ans B