Answer:
HCL being a strong electrolyte dissociates in water to give H+ and Cl- ions. KMnO4 being a strong oxidising agent oxidises Chloride ion(Cl-) to Cl2. ... Hence more amount of KMnO4 is usedup which results in error in reading. The situation is completely the opposite with K2Cr2O7.
hope this helps
If temperature is held constant for an ideal gas, as P and V change for a given gas sample, the PV of products will_____. increase decrease be constant change
Answer:
The PV of products will be constant.
Explanation:
Ideal gas equation- PV = nRT
where P is pressure of gas, V is volume of gas, n is number of moles of gas, R is gas constant and T is temperature (in Kelvin) of gas.
Now, number of moles of a gas remain constant with change in state variables.
So, if T is constant then the term "nRT" remins constant.
As PV is equal to nRT therefore PV will be constant if temperature is held constant.
In another way we can say if P is increased then V will decrease or vice versa.
Answer:
Be Constant
Explanation:
The SI unit for energy is the Joule (J). Sam wants to convert 338.25 J into kJ.
Which operation should he choose?
He should multiply 338.25 by 10.
He should multiply 338.25 by 100.
He should divide 338.25 by 100.
He should divide 338.25 by 1000.
Answer:
The answer id D. on EDGEN.
Explanation:
D. He should divide 338.25 by 1000.
He should divide 338.25 by 1000. Hence, option D is correct.
What is energy?Energy is the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other forms.
To convert a joule measurement to a kilojoule measurement, divide the energy by the conversion ratio.
The energy in kilojoules is equal to the joules divided by 1,000.
[tex]\frac{338.25 J}{1000}[/tex]
= . 33825 kJ
Hence, .33825 kJ is the energy when we convert 338.25 J to kJ.
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Which statements best describe gases? Check all that apply.
The atoms in a gas move at high speeds.
The atoms in a gas often get stuck
together.
The atoms in a gas spread in all directions.
Gases have a definite shape.
Gases have a definite volume.
The atoms in a gas move at high speeds.
The atoms in a gas spread in all directions.
What are gases?
A gas is a sample of matter that conforms to the shape of a container in which it is held and acquires a uniform density inside the container, even in the presence of gravity and regardless of the amount of substance in the container.
Gas is one of the three main states of matter.
Gas is made up of atoms, tiny particles that makeup molecules, and molecules that move faster and further away as compared to other states of matter, which enables gas to fill a container evenly.
Hence, the atoms in a gas move at high speeds and the atoms in a gas spread in all directions.
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Final answer:
Gases consist of atoms that move at high speeds and spread in all directions, filling the volume of their container. They have no definite shape or volume and can be easily compressed or expand.
Explanation:
When considering the properties of gases, it's important to recognize several key characteristics that describe their behavior:
The atoms in a gas move at high speeds, traveling in straight lines and only changing direction when they collide with something, such as other gas atoms or the walls of their container.The atoms in a gas spread in all directions because they are in continuous motion and there are no significant forces keeping them together.Gases do not have a definite shape or a definite volume, they expand to fill the container they are in and can easily be compressed or expand based on external factors.Therefore, the statements that best describe gases are:
The atoms in a gas move at high speeds.The atoms in a gas spread in all directions.Gases have no definite shape.Gases have no definite volume.what volume of 0.500 mol/L hydrochloric acid, HCI (aq) is required to react completely with 1.00 g of aluminum hydroxide, AI(OH)3 (s)?
Please help
To find the volume of hydrochloric acid (HCI) required to react completely with aluminum hydroxide (AI(OH)3), use the balanced chemical equation and stoichiometry. The equation is AI(OH)3 (s) + 3HCl (aq) -> AICl3 (aq) + 3H2O (l). Convert the mass of AI(OH)3 to moles, then use the mole ratio to find the volume of HCl.
Explanation:To find the volume of hydrochloric acid (HCI) required to react completely with aluminum hydroxide (AI(OH)3), we need to use the balanced chemical equation for the reaction and the stoichiometry of the reaction.
The balanced chemical equation is: AI(OH)3 (s) + 3HCl (aq) -> AICl3 (aq) + 3H2O (l)
From the equation, we can see that 1 mole of AI(OH)3 reacts with 3 moles of HCl. Given that the concentration of HCl is 0.500 mol/L, we can convert the mass of AI(OH)3 to moles, then use the mole ratio to find the volume of HCl:
Calculate the moles of AI(OH)3: 1.00 g AI(OH)3 * (1 mol AI(OH)3 / molar mass AI(OH)3)Use the mole ratio to find the moles of HCl: moles AI(OH)3 * (3 moles HCl / 1 mole AI(OH)3)Convert moles of HCl to volume using the concentration: moles HCl * (1 L / 0.500 mol)Plug in the values above to calculate the volume of HCl required.
Given the balanced equation representing a reaction:
HSO4- (aq) + H20() → H30+(aq) + SO42-(aq)
According to one acid-base theory, the H2O(2) molecules act as
a base because they accept H+ ions
a base because they donate H+ ions
an acid because they accept H+ ions
an acid because they donate H+ ions
Submit Answer
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Next >
Answer:
it is a base because they accept H+ ions
Explanation:
The correct answer is a base because they accept H+ ions.
According to one acid-base theory, what is the base?The base is a substance that can accept H+ ions. A proton can be donated by a conjugated acid and the base reforms.[tex]OH^{-} + H^{+}[/tex]⇄ [tex]H_{2}O[/tex]
According to one acid-base theory, what is the example of the base?Acetic acid provides a proton and functions as an acid in this process, whereas the water molecule (base) takes a proton.
[tex]CH_{3}CO_{2}H + H_{2}O[/tex] ⇄[tex]CH_{3}CO_{2} ^{-} + H_{3}O^{+}[/tex]
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Which of the following is not matter? a) Blood b) Humidity c) Electron d) Moon rock
Answer:
Humidity is the answer.
Which phrase describes a scientific theory?
Answer:
C
Explanation:
Answer: C. A thoroughly tested and widely accepted explanation. Explanation: A scientific theory is a coherent statement or set of ideas that explains observed facts or phenomenon and are thoroughly tested and widely accepted.
Which metric unit of length or distance is most com-
parable in scale to each of the following English sys-
tem units for making measurements?
a. an inch
b. a yard
c. a mile
Is steel ionic, covalent or metallic
Answer:
Steel is bonded together by a metallic bond.
Explanation:
There is attractions in the bond, Steel has negative electrons and positive ions, which attract each other. They hold the structure together thus forming a metallic bond.
What is the hydrogen ion and hydroxide ion concentration for a pOH of 3.557? Is the solution an acid or a base?
Answer:
Hydrogen ion concentration is 2.773E-4Mole per DM3
Hydroxide ion concentration is 4.093E-11
It is an acid
Explanation:
PH(H3O)=-LogH3O
PH=3.557
H3O=antilog of -3.557
antilog of -3.557=antilog (0.443 -4)
antilog0.443 ×antilog -4=2.773E-4mole per DM3.
(H3O)(OH)=10^-14
H30=2.773×10^-14
OH= 1.00E-14/2.773E-4
=4.093E-11
it is an acid since the concentration of hydrogen ion is more than the hydroxide ion
Answer:
[tex]3.606\times 10^{-11} M[/tex] is the hydrogen ion concentration.
0.0002773 M is the hydroxide ion concentration.
The solution has pH value more than 7 which means that it is base.
Explanation:
The pH of the solution is defined as negative logarithm of hydrogen ions concentration in a solution. Lower the value of pH more acidic will the solution.
Mathematically written as:
[tex]pH=-\log[H^+][/tex]
The pOH of the solution is defined as negative logarithm of hydroxide ions concentration in a solution. Lower the value of pOH more alkaline will the solution.
Mathematically written as:
[tex]pOH=-\log[OH^-][/tex]
The sum of ph and pOH is equal to 14.
pH + pOH = 14
We have:
Solution with pOH = 3.557
The pH of the solution = 14 - pOH = 10.443
[tex]pH=-\log[H^+][/tex]
[tex]10.443=-\log[H^+][/tex]
[tex][H^+]=3.606\times 10^{-11} M[/tex]
[tex]3.606\times 10^{-11} M[/tex] is the hydrogen ion concentration.
[tex]pOH=-\log[OH^-][/tex]
[tex]3.557=-\log[OH^-][/tex]
[tex][OH^-]=0.0002773 M[/tex]
0.0002773 M is the hydroxide ion concentration.
The solution has pH value more than 7 which means that it is base.
Which item is an alloy?
a bowl of salsa
a bottle of salad dressing
a metal cooking pot
a cake made with gelatin
A metal cooking pot is an alloy.
Hence, Option (C) is correct answer.
What is an Alloy ?An alloy is a mixture of metals and other elements. It is a substance which has metallic properties.
Examples: Steel is an alloy of iron and carbon. Bronze is an alloy of copper and tin. Brass is an alloy of copper.
A metal cooking pot are made from stainless steel, cast iron, copper or glass.
Thus, from the above conclusion we can say that A metal cooking pot is an alloy.
Hence, Option (C) is correct answer.
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Which body system is NOT a part of the excretory system?
A.)circulatory system
B.)digestive system
C.)respiratory system
D.)integumentary system
I would go with option D.integumentary system
ANSWER QUICKLY ASAP 10 POINTS
electromagnet can be made by wrapping wire around which object??
a glass bottle
an iron nail
a pencil
a rubber duck
Answer:
IRON NAIL
Explanation:
Answer:
B.) Iron nail
Explanation:
I took this quiz, k12 8th grade
Best of luck deary...<3
Best of luck to all future comers...<3
7. In the cycle, a virus integrates its DNA into the host's DNA, and its DNA is replicated when the host
DNA is replicated.
A. infectious
B. retroviral
C. lysogenic
D.lytic
Answer:
Its lysogenic cycle if a virus integrates its DNA into host cell.
Explanation:
Bacteriophages are the viruses which infect bacteria. Viruses are obligatory parasites which need host for their survival. Viruses which infect bacteria can either take up the lytic cycle or lysogenic cycle. Lytic as the name suggests involves the lysis of host bacterial cell after the replication of virus. Once the bacterial cell is lysed and the virions are released they invade another host bacterial cell. In the other case i.e. lysogenic cycle, the bacteriophage after infecting the host bacterial cell integrates its genome into the host cell genome. At this stage we call it as prophage. The viral genome gets replicated with the host cell machinery but does not produces the viral protein and remains dormant with in the host cell. The integrated genome of virus is passed on to the daughter cells as the cell division occurs. Once the bacterial host cell condition becomes progressively worse, the reproductive cycle of virus begins resulting in the lysis of host cell.
what type of electromagnetic waves does the human eye see as the colors red blue or green
A Visible light waves
B Radio waves
C infrared waves
D microwaves
Answer:
A. Visible light waves.
Answer: A Visible light waves
Explanation:
Electromagnetic wave is defined as the wave which is associated with both electrical and magnetic component associated with them. They can travel in vacuum as well and travel with the speed of light.
The Electromagnetic spectrum involves gamma rays , X rays, ultra violet rays, visible rays, infrared rays, micro waves and radio waves which are arranged in order of increasing wavelength and decreasing frequency.
Visible region consists of violet, indigo, blue, green, yellow, orange and red light and they have wavelengths which are visible to naked eyes.
Which is an example of a free expansion of a gas?
the expansion of a gas due to a chemical reaction among its particles
the uncontrolled expansion of a gas into a vacuum
the expansion of a gas as it performs work on its container
the expansion of a gas as heat is transfered to it at constant pressure
The uncontrolled expansion of a gas into a vacuum is an example of a free expansion of a gas. Therefore, the correct option is option D.
What is free expansion?These really are adiabatic processes where no heat is transferred between both the system and its surrounding environment and therefore no work is performed on or by the system. These adiabatic processes are known as free expansion. A gas expands inside an enclosed evacuated chamber in an irreversible process.
It is also known as Joule expansion. The temperature of an ideal gas does not fluctuate (see Joule's Second Law), whereas actual gases suffer temperature changes during free expansion. Q = W = 0 in free expansion. The uncontrolled expansion of a gas into a vacuum is an example of a free expansion of a gas.
Therefore, the correct option is option D.
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Final answer:
A free expansion of a gas occurs when it expands into a vacuum, such as when gas confined in a flask fills up an adjoining vacuum flask upon opening a valve between them, increasing the entropy of the system without performing any work on its surroundings.
Explanation:
An example of a free expansion of a gas is the uncontrolled expansion of a gas into a vacuum. This process, also referenced as a macroscopic example of a particle-in-a-box model, involves a gas initially confined to one of two flasks. When a valve between the flasks is opened, the gas expands to fill the available volume in both flasks. This spontaneous expansion leads to an increase in the entropy of the system. Unlike scenarios where a gas expands as it heats up or performs work by pushing against the containers' walls, the unique characteristic of a free expansion is that it occurs without the gas performing any work on its surroundings and without a change in energy due to heat transfer.
Ionic solids such as sodium chloride are easily shattered, but metallic solids such as copper can be easily bent and shaped. This difference occurs because _________.
A. ionic solids have low melting points
B. covalent bonding between sodium and chlorine keeps the solid rigid
C. mobile electrons in the copper can shift without disrupting the solid
Answer:
C. mobile electrons in the copper can shift without disrupting the solid
Explanation:
Most of the properties of metals results from the metallic bonds between atoms of the metals. The bond forms from the attraction between the positive nuclei of all the closely packed atoms in the lattice and the electron cloud jointly formed by the atoms losing their outermost shell electrons due to their low ionizatin energy.
This is not so in ionic solids.
a white coloured salt silver chloride is placed in sunlight in a watch glass. state your observation. write a balanced chemical equation for this reaction. identify and define this type of reaction.
Answer:
2AgCl == 2Ag + Cl2
Explanation:
when a white colour salt silver chloride is placed in a sunlight in a watch glass decomposition by sunlight takes place and this type of reaction is takes place when a single compound breaks down into two or more reactants name the energy is supplied in the form of Sunlight the following is the chemical equation for for this reaction
2AgCl == 2Ag + Cl2
Answer:
When white silver chloride is exposed to sunlight, thermal energy excites the silver atoms which appears in flakes and it is black in colour which overtime spreads over to the silver chloride which is white in colour and turns it grey.
This reactions with sunlight dissociate the silver atoms into silver metals and chlorine molecule and it's called PHOTOCHEMICAL REACTION, since its requires energy in form of light to be initiated. Silver chloride are kept in amber bottles away from sunlight so as to prevent this decomposition.
Sunlight
2AgCl —————》 2Ag + Cl2
The trend for ionization energy is a general increase from left to right across a period. However, magnesium (Mg) is found to have a higher first ionization energy value than aluminum (Al). Explain this exception to the general trend in terms of electron arrangements and attraction/repulsion
Answer:
Explanation:
The noticeable exception in the trends of ionization energy of Mg and Al can best be explained using the arrangements of the electrons in the sub-levels.
Mg with 12 electrons has an electronic configuration of 2,8,2 = 1S²2S²2P⁶3S²
Al with 13 electrons has an electronic configuration of 2,8,3 = 1S²2S²2P⁶3S²3P¹
Lets take a little peep into what ionization energy is.
Ionization energy is a measure of the readiness of an atom to lose electron. The amount of energy needed to remove an electron is called the ionization energy. In this regard, the first ionization energy is the energy need to remove the valence or the most loosely held electron in an atom.
The magnitude of the ionization energy depends on a number of factors. The most important to our discuss here are:
Nuclear chargeAtomic radiusSublevel accomodating the electron to be removedSpecial stability of filled or half-filled sublevels.The arrangement of electrons in Mg confers a special stability on it because of the filled sublevel.
The maximum number of electrons in each sub-levels are:
s-orbital = 2 electrons
p- orbital = 6 electrons
d - orbital = 10 electrons
f - orbital = 14 electrons
In Mg, 1S²2S²2P⁶3S² , the outermost s-sublevel have 2 electrons and s-orbital can accomodate a maximum of 2 electrons in this subshell. This makes the arrangement stable.
For Al, 1S²2S²2P⁶3S²3P¹, the outermost p-subshell houses just one electron but it can accommodate a maximum of 6 electrons. This arrangement is unstable.
Due to this electron arrangements, Mg would have a very stable configuration and a greater first ionization energy compared to Al.
The complete combustion of 1 mole of glucose in a living cell releases _____ the complete combustion of 1 mole of glucose by fire.
Answer:
The same amount of energy as
Explanation:
The complete combustion of 1 mole of glucose in a living cell releases the same amount of energy as the complete combustion of 1 mole of glucose by fire.
The same amount of glucose contains a fixed amount of energy
Answer: The same amount of energy
Explanation: Glucose the primary source of energy for all the living organism. In order to sustain a life, organisms need to use energy for all the vital processes of the body.
Combustion of glucose inside the body or combustion of glucose outside in the environment with the help of fire will generate the same amount of energy.
24g of magnesium reacts with 38 g of fluoride o produce __ g magnesium fluoride
Answer: 62g
Explanation: You add 24g and 38 grams because when a substance reacts with another substance there is the same amount of grams in the product, so there would be 62 grams in the product because that is the amount of grams there is in the reactants.
In a chemical reaction, 24g of magnesium reacts with 38g of fluoride to yield 62g of magnesium fluoride according to stoichiometry principles.
Explanation:The question refers to a stoichiometry problem in chemistry related to the reaction of magnesium and fluoride to produce magnesium fluoride. Stoichiometry is the calculation of relative quantities of reactants and products in chemical reactions. Using the balanced equation for the reaction of magnesium and fluoride:
Mg + F2 → MgF2
In this reaction, one mole of magnesium reacts with one mole of fluorine to produce one mole of magnesium fluoride. Given the atomic masses (Mg = 24 g/mol, F =19 g/mol, MgF2 = 62 g/mol), this reaction signifies that 24g of Magnesium will react with 38g of Fluoride to produce 62g of Magnesium Fluoride. Therefore, the question's accurate answer is: 24g of magnesium reacts with 38g of fluoride to produce 62g of magnesium fluoride.
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The percent yield of a chemical reaction is
valuable to many industries. Low percent yields
can result in the loss of large amounts of money..
Which of the following would likely increase the
percent yield of a reaction?
Check all that apply.
using accurate measurements
using pure chemicals
performing the reaction under the most ideal
conditions
adding water to the experiment
DONE
o
Photo by Luigi Chiesa
Answer:
The correct choices are:
using accurate measurementsusing pure chemicalsperforming the reaction under the most ideal conditionsExplanation:
The theoretical yield is the maximum amount of product that could be obtained by the chemical reaction, from a given amount of reactants. You calculate the theoretical yield using the stoichiometry coefficients of the balanced chemical equation.
The percent yield is the ratio of the actual yield (the actual amount obtained) of a product to the theoretical yield for the same product, expressed as a percentage (i.e. multiplied by 100).
percent yield = actual yield × 100 / theoretical yieldAs the actual yield decrease (the numerator of the ratio), the percent yield decrease.
To increase the percent yield it is important:
using accurate measurementsusing pure chemicalsperforming the reaction under the most ideal conditionsUsing accurate measurements: if you do not add the correct amounts of each reactant, then the product obtained will not be what you can predict from the theoretical calculations and you will be wasteing one or other reactant, without reaching the maximum yield possible.
Using pure chemicals: if the chemicals are not pure, the amount of actual reactants will be lower than they should be, leading to a lower actual yield.
Performing the reaction under the most ideal conditions: the actual rate of reactions depend on the conditions: temperature and pressure are the most commons. Since, temperature and pressure may change that rate of reactions, you should find and use the most ideal conditions to get the greatest actual yield.
Adding water, can just dilute the reactants and would decrease the rate of reaction, which would not be helpful to increase the yield.
Answer is using accurate measurements
using pure chemicals
performing the reaction under the most ideal conditions
Which is the most likely reason why an aerosol can explodes when it is thrown into a fire?
Heated air particles flow from the atmosphere into the can.
The metal in the can expands due to the heat of the fire.
The particles in the can move more slowly until they join together.
Heat causes the gas particles in the can to move faster and farther apart.
Hello There!
Your Answer is that “heat causes the gas particles in the can to move faster and farther apart.”
An aerosol is a tiny liquid or solid particle that is suspended in the atmosphere.
How is temperature related to the physical change of a substance?
Answer:
Temperature is a measure of the kinetic energy of particles in a substance. As temperature increases, the atoms or molecules in a substance gain energy. As temperature decreases, the particles lose energy. A change in the energy of particles causes a change in their arrangement. A change in the arrangement of particles can lead to a physical change.
Explanation:
edge 2023
How do you calculate percentage yield? What is the definition of percentage yield?
Answer:
It's the percent ratio of actual yield to the theoretical yield.
Explanation:
Theoretical yield is the calculated yield using the balanced chemical reaction. Actual yield is what is actually obtained in a chemical reaction. Percent yield is a comparison of the actual yield with the theoretical yield.
Explanation:To compute the percent yield, it is first necessary to determine the theoretical yield, which is the maximum amount of product that could be formed from the given amounts of reactants. The theoretical yield is calculated based on the stoichiometry of the chemical equation. The actual yield, on the other hand, is what is actually obtained in a chemical reaction when it is carried out in the laboratory. The percent yield is then determined by calculating the ratio of the actual yield to the theoretical yield, multiplied by 100 to give a percentage.
Choose all that apply. When creating a graph, you should:
determine the x- and y- variables
label the scale on the x- and y- axes
plot the data points
draw a line of best fit to represent the data trend
Answer:All of them
Explanation:
Answer: The correct answer is all of them!
Explanation:
Looked at my lesson after seeing mixed answers and the correct answer is all of them!
A piece of copper has a temperature of 75.6 0C. When the metal is placed in 100.0 grams of water at 19.1 0C, the temperature rises by 5.5 0C. What is the mass of the metal?
The mass of the copper is approximately 1085.55 g.
To solve this problem, we can use the principle of heat transfer, which states that the heat lost by the metal (copper) is equal to the heat gained by the water.
The heat gained or lost by a substance can be calculated using the formula:
[tex]\[ Q = mc\Delta T \][/tex]
Where:
- Q is the heat gained or lost (in joules)
- m is the mass of the substance (in grams)
- c is the specific heat capacity of the substance (in J/g°C)
- [tex]\( \Delta T \)[/tex] is the change in temperature (in °C)
For copper, the specific heat capacity is approximately [tex]\( 0.385 \, J/g ^\circ C} \)[/tex], and for water, it's 4.18 J/g°C.
Let's denote:
- [tex]\( m_c \)[/tex] as the mass of the copper
- [tex]\( m_w \)[/tex] as the mass of the water
- [tex]\( \Delta T_c \)[/tex] as the change in temperature of the copper
- [tex]\( \Delta T_w \)[/tex] as the change in temperature of the water
Given:
- [tex]\( \Delta T_c = \Delta T_w = 5.5 \, ^\circ C} \)[/tex]
- [tex]\( c_c = 0.385 \, J/g^\circ C} \)[/tex] (specific heat capacity of copper)
- [tex]\( c_w = 4.18 \, J/g^\circ C} \)[/tex] (specific heat capacity of water)
- [tex]\( T_{c,i} = 75.6 \, ^\circ C} \)[/tex] (initial temperature of copper)
- [tex]\( T_{w,i} = 19.1 \, ^\circ C} \)[/tex] (initial temperature of water)
We can set up the equation:
[tex]\[ m_c \cdot c_c \cdot \Delta T_c = m_w \cdot c_w \cdot \Delta T_w \][/tex]
Solving for [tex]\( m_c \)[/tex]:
[tex]\[ m_c = \frac{m_w \cdot c_w \cdot \Delta T_w}{c_c \cdot \Delta T_c} \][/tex]
Substituting the given values:
[tex]\[ m_c = \frac{100.0 \, \text{g} \cdot 4.18 \, {J/g ^\circ C} \cdot 5.5 \, {^\circ C}}{0.385 \, {J/g^\circ C} \cdot 5.5 \, {^\circ C}} \][/tex]
[tex]\[ m_c = \frac{2299 \, \text{J}}{2.1175 \, \text{J}} \][/tex]
[tex]\[ m_c \approx 1085.55 \, \text{g} \][/tex]
So, the mass of the copper is approximately 1085.55 g.
Which headings best complete the chart?
O X: Transparent Objects
Y: Opaque Objects
O X: Opaque Objects
| Y: Transparent Objects
O X: High Frequency Waves
Y: Low Frequency Waves
O X: Low Frequency Waves
Y: High Frequency Waves
Answer:B
Explanation:
Which of the following statements is true in all cases?
A. Chemical bonds are broken in an exothermic reaction.
B. Chemical bonds are formed in an endothermic reaction
C. Energy is released in an endothermic reaction.
D. Energy is absorbed in an endothermic reaction.
Answer:
D. Energy is absorbed in an endothermic reaction
Explanation:
In all cases, an endothermic reaction is one in which is absorbed from the surroundings for the reaction to take place. After the reaction, the surrounding becomes colder as heat is drawn from it to furnish the reaction.
It is in an exothermic reaction that heat is liberated to the surroundings and this makes the surrounding hotter at the end of the reaction.
In some reactions, when bonds are broken, they can release energy and they can also absorb energy.
Answer:
D
Explanation:
Energy is absorbed in the form of heat
Edge2021
An object weighing 89.7g is placed in graduated cylinder displacing the volume from 50.0mL to 60.5 mL
Answer:The density of an object is 8.54 g/mL
Explanation: