As the volume of the sound is seen to increase, the sound that we hear is louder as the amplitude of the sound increases.
What is sound?Sound is a kind of wave that moves through a medium. We know that sound has to move via several compressions and rare factions. This implies that sound is as well propagated through air. The movement of the sound waves through air is because the air is set into vibration by the sound. Thus, the air is very imprtant in the movement of the sound waves.
With this much said, we can see that if there is more air, there would more molecules that can be set into vibration and the sound wave would tend to increase and that is the deal that we are trying to communicate here.
Thus, the amplitude of air increases as the volume of the sound gets higher and the sound that we hear is much louder.
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How many moles is 1.2
×
1023 atoms of Ne?
Answer:
the answer would be 7.584*10^23
Which describes the MOST LIKELY effect of the mismatch on future birds?
A. There could be a shift to earlier reproduction in
the birds.
B. The next generations of birds may choose to not
reproduce.
C. There could be a shift to later reproduction in the
birds.
D. The next generations of birds may choose to
reproduce more often.
The statement which best describes the most likely effect of the mismatch on future birds is that there could be a shift to later reproduction in the birds and is therefore denoted as option C.
What is Reproduction?
This is referred to as the process in which an offspring is produced from their parent or cells and involves the fusion of gametes.
In the effect of mismatch on future birds, there will be a reduction in the birds getting a mate which therefore shift to later reproduction and is therefore the reason why option C was chosen as the correct choice.
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The statement that describes the most likely effect of the mismatch on future birds is that there could be a shift to later reproduction in the
birds.
So option C is correct.
What is reproduction?Reproduction is described as the biological process by which new individual organisms offspring are produced from their "parent" or parents.
If there is mismatch on future birds, one of the many effects is that there could be a shift to later reproduction in the birds which the consequences of such mistiming in reproduction are reduced reproductive output.
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A student performed the following steps in an investigation:
1. Add a few drops of red food coloring to 50 mL of water in a beaker.
2. Stir the contents of the beaker using a glass stir rod.
3. Add 20 mL of yellow vegetable oil.
4. Stir the contents of the beaker using a glass stir rod.
5. Leave the beaker undisturbed for 24 hours.
Which of the following statements about the investigation is most accurate?
A The student made a compound out of pure substances and then made a homogeneous mixture.The student made a compound out of pure substances and then made a homogeneous mixture.
B The student made a solution and then a heterogeneous mixture.The student made a solution and then a heterogeneous mixture.
C The student made a homogeneous mixture and then made a pure substance through a chemical reaction.The student made a homogeneous mixture and then made a pure substance through a chemical reaction.
D The student made a heterogenous mixture and then stirred it until it was a homogeneous mixture.The student made a heterogenous mixture and then stirred it until it was a homogeneous mixture.
The statement that is true is that; the student made a solution and then a het---erogeneous mixture.
What is true about the set up?We know that a solution is composed of a substance that dissolves in a solvent. The solution is made when the red coloring is dissolved in the water and then when we add the oil, there is now a layer that is not in phase with the rest of the solution.
The vegetable oil would then tend to separate out of the rest of the solution and then form a het--erogenous mixture. We can be able to have the two of them come together by stirring the mixture for some time.
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Explain how to
count the
number of atoms
in a molecule
that has
parentheses ()
around it?
The subscript outside of the parentheses in such a formula indicates that you must multiply it by the number of atoms within to calculate the number of atoms.
How do atoms work?One or more electrons with negative charges surround the core nucleus of an atom, which is made up of all of them. One or more protons and neutrons, which are comparatively heavy particles, can be found in the positively charged nucleus. The fundamental units of matter are called atoms.
How are atoms created?It is made up of neutrons, which have no charge, and protons, with a positive charge. All regular, naturally occurring atoms contain protons, neutrons, and the electrons that orbit them. These particles have a lengthy lifetime. Along with these three categories of particles, more subatomic particles might be present.
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which confirmatory test will be used for iron (iii) , and which one for nickel (ii)? why was this reagent chosen? should the solution be acidic or basic for this test?
A confirmatory test for iron(iii) is Potassium Ferrocyanide.
The addition of potassium thiocyanate to Fe3+ produces a reddish-brown color due to the formation of this complex. The formation of the reddish-brown color confirms the presence of Fe3+.
The solution should be acidic for this test
A confirmatory test for nickel(ii) is dimethylglyoxime reagent (DMG).
Adding 2 or 3 drops of dimethylglyoxime reagent (DMG) to nickel(ii) will produce a rose-red precipitate of Ni(DMG)2 should form.
The solution should be basic for this test.
What is the confirmatory test for Fe3+?
Fe3+ forms a complex with thiocyanate, SCN−. The addition of potassium thiocyanate to Fe3+ produces a reddish-brown color due to the formation of this complex. The formation of the reddish-brown color confirms the presence of Fe3+.
What is the confirmatory test for Ni2+?
Add dimethylglyoxime(DMG) to the nickel ion solution. Next, add a little bit of ammonia to make the solution basic. It will give a red precipitate. This confirms the presence of Ni2+.
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if x x represents the molar solubility of b a 3 ( p o 4 ) 2 bax3(pox4)x2 , what is the correct equation for the k s p ksp ?
If x represent the molar solubility of Ba₃(PO₄)₂ Bax₃(POx₄)x₂ the correct equation for Ksp is (3x)³(2x)².
The equation is given as :
Ba₃(PO₄)₂ ⇄ 3Ba²⁺ + 2PO₄³⁻
if x represent molar solubility then , we get :
Ba₃(PO₄)₂ ⇄ 3Ba²⁺ + 2PO₄³⁻
3x 2x
therefore , the solubility product constant is given as :
Ksp = (3x)³(2x)²
The solubility product constant is the equilibrium constant which used for the dissolving of solid substances into the aqueous solution. The solubility product constant is denoted as Ksp. The value of solubility constant depends on temperature.
Thus, If x represent the molar solubility of Ba₃(PO₄)₂ Bax₃(POx₄)x₂ the correct equation for Ksp is (3x)³(2x)².
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in the lichen experiment, the metal cations bound to the the lichen disk surface, and the methylene blue dye was leached into the solution question 7 options: true false
False; after coming into contact with metal cations, methylene blue solution leaches out of the lichens. Because they can accept electrons, metal cations are very electronegative.
Methylene, often known as carbene, is an organic molecule having the chemical formula CH 2 that is also formally known as methylidene and hydrocarbon (also written [CH 2]). It is a colourless gas that only persists in diluted form or as an adduct, fluorescing in the mid-infrared range. The most fundamental carbene is methylene.
A lichen is a symbiotic association between many organisms, such as a cyanobacterium or an algae. In addition to being unique from algae, cyanobacteria are also known as blue-green lichen.
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The idea that younger rock layers are deposited on top of older rock layers in an undisturbed section of sedimentary rock can best be explained by which of Steno's principles?
A. principle of superposition
B. principle of original horizontality
C. principle of original lateral continuity
The idea that younger rock layers are deposited on top of older rock layers in an undisturbed section of sedimentary rock can best be explained by the principle of superposition.
Principle of superposition is the major principle of geography. The oldest layer of the rock is consider as a base rock. after the oldest layer the layered formed are in ascending order of younger layer. so, from this principle we can younger and older one.
Thus, The idea that younger rock layers are deposited on top of older rock layers in an undisturbed section of sedimentary rock can best be explained by the principle of superposition.
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The table below shows the boiling points of
some halogens.
Explain the trend in the boiling points of the
halogens.
Answer:
Boiling point decrease from left to right of the periodic table
according to dalton, if 6g of carbon react with 17 g of hydrogen, how many grams of carbon combine with 85 g of hydrogen?
Considering Dalton's theory 30 grams of Carbon combines with 85 grams of hydrogen.
Daltons theory is based on the law of conservation of mass and also the law of constant composition. The first part of his theory states that all matter is made up of atoms, and these atoms are indivisible. The second part of this theory says that atoms of a given element are identical in mass and also in properties. But it will be different only in case of different types of molecules present together.
According to Daltons theory if 6 grams of Carbon is reacting with 17 grams of Hydrogen then for 85 grams of Hydrogen the amount of carbon required will be
⇒ 6 × 85 = 30
17
Therefore 30 grams of Carbon is required to combine with 85 grams of Hydrogen.
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From each of the following ion concentrations in a solution, predict whether a precipitate will form in the solution. (Hint: Calculate Q and compare Q to Ksp)
a) [Ba2+] = 0.020 M, [F-] = 0.015 M Ksp= 1.0x10-6
BaF2(s) Ba2+(aq) + 2F-(aq)
b) [Pb2+] = 0.035 M, [Cl-] = 0.15M Ksp= 1.6x10-5
PbCl2(s) Pb2+(aq) + 2Cl-(aq)
If the ionic constant Q is greater than Ksp the solution forms precipitate if it is lower than the solubility constant Ksp then there will be no precipitate. Both of the given solutions forms precipitate.
What is ionic constant?The ionic constant Q of a solution is the product of molar concentrations of reactants. Solubility constant Ksp is the product of solubilities of the reactant ions when the reaction is in equilibrium.
For the first solution Q = 0.020 M × 0.015M = 0.003.
Ksp = 0.000001. Hence, Q is greater than Ksp which means the solution forms precipitate of BaF₂.
For the second solution Q = 0.035 M × 0.15 M =0.0025.
This is greater than Ksp = 1.6 × 10⁻⁵. Hence, this solution forms a precipitate of PbCl₂.
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A chemist burns isopropyl alcohol (C3H8O) according to the following equation: C3H8O + 3 O2 → 3 CO + 4 H2O If he burns 275 grams of C3H8O in excess oxygen, how many grams of water will be made?
Answer:
329.8g of H2O are produced
Explanation:
You have to do stoichiometry to convert grams of isopropyl alcohol to grams of water.
Convert grams of isopropyl alcohol to moles of isopropyl alcohol (use molar mass of isopropyl alcohol) Convert this to moles of water using molar coefficients Convert moles of water to grams (use molar mass of water)Explain why onions make you cry
Name the following bonds:
1. calcium
2. rubidium iodide
3. nickel (IV) selenide
Answer:
Ionic bondIonic bondIonic bondExplanation:
1) Calcium = ?
→ Ca will constitute to form ionic bond.
2) Rubidium iodide = ?
→ Rubidium iodide will form ionic bond.
3) Nickel (IV) selenide = ?
→ Nickel (IV) selenide forms ionic bond.
Which type of fire can help prevent larger fires in the
future?
ACrown
B Surface
C Ground
Future greater fires can be avoided by putting out ground fires, which are those that burn beneath the surface.
The correct answer is C
Describe ground fire.A ground fire is a particular kind of wildfire that starts underground when fuels like peat, coal, tree roots, or other buried organic debris catch fire and burn. Ground fires may end up burning through the ground's surface and turn into surface fires, depending on the circumstances of the fire.
Why do ground fires start?Plant roots as well as other organic material ignited beneath the soil surface cause ground fires. Surface fires, which burn old or dried vegetation that is laying or growing slightly above the ground, might develop from these fires. On the contrary hand, crown fires consume the tree canopy.
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What is the mass in gram of carbon atoms in 4.4g of C3H8 ?
Help ASAP
I'LL MARK BRAINLIEST
which one of the following best describes the difference between molar mass and formula weight? a) formula weights are measured in grams per mole, while molar masses are measured in atomic mass units. b) a formula weight is the mass of one molecule or formula unit while a molar mass is the mass of one mole of molecules or formula units. c) molar masses only describe the mass of ionic compounds, while formula weights can describe any compound. d) there is no difference between molar masses and formula weights.
The following best describes the difference between molar mass and formula weight is a formula weight is the mass of one molecule or formula unit while molar mass is the mass of one mole of molecules or formula units.
A formula mass is the sum of all masses of atom present in empirical formula. molecular mass is the mass of one mole of molecule. formula weight base on empirical formula while molecular mass is depend on molecule.
Thus, The following best describes the difference between molar mass and formula weight is a formula weight is the mass of one molecule or formula unit while molar mass is the mass of one mole of molecules or formula units.
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the electron configuration filling patterns of some elements in group 6b(6) and group 1b(11) reflect the of half-filled and completely filled sublevels. multiple choice question. decreased stability penetration scarcity increased stability
The electronic configuration packing patterns of some elements in group 6b(6) and group 1b(11) reflect the enhanced stability of half-filled and fully-filled sublevels. So option (c) is correct.
What is electronic configuration?The electronic configuration of an element describes how the electrons are distributed in its atomic orbitals. For example, the electron configuration of sodium is 1s²2s²2p⁶3s¹
The three rules that direct the manner in which electrons are to be filled in atomic orbitals are:
Aufbau principle: Electrons must completely fill the atomic orbitals of a given energy level before occupying an orbital of a higher energy level. Electrons fill orbitals in the increasing order of orbital energy level.
Pauli’s exclusion principle: It states that two electrons can never have equal values for all four quantum numbers. Also each subshell of an orbital can have a maximum of 2 electrons and both these electrons must have opposite spins.
Hund’s rule of maximum multiplicity: The subshells in an orbital must be singly occupied before it is doubly occupied. Furthermore, the spin of all the electrons in singly occupied subshells should be the same (to maximize the overall spin).
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sodium atoms contain 11 protons and 11 electrons with a mass of approximately 23. the atomic number of sodium is therefore:
the 2s and 2p sublevels are very close in energy, as are the 3s and 3p sublevels. explain how the orbital diagram for sodium confirms that the 3s sublevel is lower in energy than the 3p sublevel
The 2s and 2p sublevels are very close in energy, as are the 3s and 3p sublevels. The s sublevel is located lower on the page than the p sublevel.
Chemical bonds within substances contain energy. Exothermic reactions are those that release heat as well as chemical energy during the course of a reaction. The quantum theory defines a sublevel as an energy level. Sublevels in chemistry describe electron-related energies. Sublevels in physics can also refer to nuclear energy levels. A single orbital that can accommodate up to two electrons makes up the s-sublevel. Spherical best describes it. Since it is smaller than the 2s, which is smaller than the 3s, and so on, the 1s is the particle closest to the nucleus. 3 identical orbitals that resemble make up the p-sublevel.
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A car travels 45 km at a speed of 60 km/h. How long does it take the car
to reach its destination?
Answer:
45 mins
Explanation:
it takes 45 minutes long
270g of glucose no.of molecules
Next question: 40g of ammonium nitrate
Question 1. There are [tex]9.025*10^{23}[/tex] molecules in 270g of glucose.
Question 2. There are [tex]3.009*10^{23}[/tex] molecules in 40g of glucose.
Explanation:Question 1. 270g of glucose, no. of molecules.1. Find the chemical formula of glucose.Formula: [tex]C_{6} H_{12} O_{6}[/tex]
2. Find the molar mass of this compound.Using the molar mass of each element, which can be found in the periodic table, we make the following calculations:
Molar mass of C: 12.011 u
Total mass of C in compound: (12.011 * 6)= 72.066
Molar mass of H: 1.008 u
Total mass of H in compound: (1.008 * 12)= 12.096
Molar mass of O: 15.999 u
Total mass of O in compound: (15.999 * 6)= 95.994
Why did we multiply the molar mass of C, H and O by 6, 12, and 6? This is because the formula contains 6, 12, and 6 atoms of each element, respectively.
Add up all masses:
72.066 + 12.096 + 95.994= 180.156 g/mole
This result means that 1 mole of glucose has a mass of 180.156 grams.
3. Calculate the number of molecules.Furthermore, 1 mole of any compound has a total of [tex]6.022*10^{23}[/tex] molecules. To find the amount of molecules, find the amount of moles and then the amount of molecules. Do it in the following fashion:
180.156g -----> 1 mole
270g -----------> x
[tex]\frac{270*1}{180.156} =1.499[/tex]
270 grams of glucose is the equivalent of 1.499 moles of said compound.
Now, find the number of molecules using the amount of moles calculated previously.
180.156g ----> [tex]6.022*10^{23}[/tex]
270g ---------> x
[tex]\frac{(270*6.022*10^{23} )}{180.156} =9.025*10^{23}[/tex]
4. Conclusion.There are [tex]9.025*10^{23}[/tex] molecules in 270g of glucose.
Question 2. 40g of ammonium nitrate, no. of molecules.Repeat the same process explained previously:[tex]NH_{4} NO_{3}[/tex]
N: 14.007 u
N: 14.007 u
O: (15.999 * 3)= 47.997 u
14.007 + 4.032 + 14.007 + 47.997= 80.043 g/mole
80.043g ----> [tex]6.022*10^{23}[/tex]
40g -----------> x
[tex]x=\frac{(40*6.022*10^{23}) }{80.043} =3.009*10^{23}[/tex]
There are [tex]3.009*10^{23}[/tex] molecules in 40g of glucose.
hydrocarbons are compounds that contain only carbon and hydrogen. combustion of a sample of a particular hydrocarbon gave 5.86 g of co2 and 1.37 g of h2o. what is the empirical formula of the hydrocarbon?
the emperical formula of the hydrocarbons was CH
what is emperical formula?
The simplest whole number ratio of atoms contained in a substance is its empirical formula in chemistry. The empirical formula of sulphur monoxide, abbreviated SO, and disulfur dioxide, abbreviated S2O2, are two straightforward examples of this idea. As a result, the empirical formula for sulphur monoxide and disulfur dioxide, two compounds made of sulphur and oxygen, is the same. Their molecular formulae, which represent how many atoms are present in each molecule of a chemical compound, are different.
It's important to remember that you're dealing with a hydrocarbon in this situation, which is a chemical made up solely of carbon and hydrogen.
As you can see, the byproducts of this combustion reaction are carbon dioxide, CO2, and water, H2O.
As a result, all the carbon that was formerly a component of the hydrocarbon will now be a component of the carbon dioxide. Similar to how all of the hydrogen that originally made up the hydrocarbon is now a component of the water.
This means that you can calculate the initial amounts of carbon and hydrogen in the hydrocarbon by counting the moles of water and carbon dioxide, respectively.
So, for water you have
1.37g x 1mole H2o/18.015 =0.076moles H2o
and for carbon dioxide
5.86g x 1 mole CO2/44.01g=0.133 moles CO2
Now, you know that every mole of water contains 2 moles of hydrogen and 1 mole of oxygen, which means that the reaction produced
0.076moles H2O x 2 moles H1/mole H2O=0.152 moles H
SInce every mole of carbon dioxide contains 1 mole of carbon and 2 moles of oxygen, it follows that the reaction also produced
0.133moles CO2 x 1 mole C/1mole CO2=0.133 moles C
Finally, to find the mole ratio that exists between carbon and hydrogen in the hydrocarbon, divide these values by the smallest one
For C: 0.133moles/0.133moles=1
For H: 0.152moles0.133moles=1.14≈1
The empirical formula of the hydrocarbon will thus be
C1H1⇒CH
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what organic analytical technique is paired with the visible spectrum and cannot confirm a substances identity
The organic analytical technique that is paired with the visible spectrum and cannot confirm a substances identity is Spectrophotometry.
What is Spectrophotometry?
By measuring the intensity of light as a beam of light travels through a sample solution, a technique called spectrophotometry can determine how much light a chemical component absorbs. Every substance either absorbs or transmits light across a specific spectrum of wavelengths, according to the fundamental tenet. A known chemical substance's concentration can also be determined using this method. In several disciplines, including chemistry, physics, biochemistry, material and chemical engineering, and therapeutic applications, spectrophotometry is one of the most beneficial quantitative analysis techniques.For more informations on spectrophotometry follow
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Listed in the Item Bank are some important labels for sections of the image below. Match each label to the corresponding area it identifies in the image.
Silicon, Arsenic and Antimony
Can exchange electrons with each other to form ionic compounds
May have no luster
Tin, Calcium and Potassium
Hydrogen, Oxygen and Chlorine
Can be electrical conductors
Comprised of atoms
The corresponding match for each element is as follows:
Silicon, Arsenic, and Antimony - Metalloids
Can exchange electrons with each other to form ionic compounds _ Metals and non-metals
May have no luster - Metalloids and Non-metals
Tin, Calcium, and Potassium - Metals
Hydrogen, Oxygen, and Chlorine - Non-meatals
Can be electrical conductors - Metals and metalloids
Comprised of atoms - all
What are the properties of metals, metalloids and non-metals?The elements can be classified into three;
metalsmetalloids, andnon-metalsEach of these classes of elements has its own unique properties. The properties of the three classes of elements include the following:
Metals - metals are hard and mostly solid substances with luster. They are good conductors of heat and electricity. Metals form ionic compounds with non-metals by exchanging their electrons. Examples are calcium, sodium, copper
Metalloids - they are mostly solid substances that are intermediate conductors of heat and electricity. They may have no luster. Examples are Silicon, Arsenic, and Antimony.
Non-metals - non-metals are soft and mostly gaseous substances with no luster. They are poor conductors of heat and electricity. Non-metals form ionic compounds with metals by exchanging their electrons.
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Which statement describes a causal relationship between two variables?
The statement that describes a casual relationship between two variables would be a correlation.
What is correlation?Correlation is a statistical term used to describe the relationship between two variables. The strength of the correlation between two variables is measured by a factor known as the correlation coefficient. The correlation coefficient is represented by r.
The value of r ranges from -1 to +1.
A positive r means that the two variables have the tendency to increase together. That is a direct relationship.A negative correlation means the two variables have an inverse relationship. As one is increasing, the other is decreasing, and vice versa.A correlation of 0 means that the two variables have no linear correlation with each otherA correlation of 1 means the two variables are perfectly correlated.Thus, the casual realtionship between two variables is best described as correlation.
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How are biofuel prepared?
Answer:
fermentation of crops that are high in sugar (starch) or fat into ethanol,
Explanation:
W hitch role of water is significant for most living things in a biological system
Answer:
to drink
Explanation:
we all need water to drink without it we'll all be dead
Physical change involves a change in composition.
True
False
A physical change does indeed involve a change in composition. Hence,t the given statement is true.
A physical change is one in which the form of the matter is altered but this does not mean it transforms into another. By composition, we refer to the size and the shape of the matter which is altered after a physical change occurs.
A physical change is reversible. This means that even though the shape and size of the matter change completely, it can always be reverted back to how it was by applying all the conditions that were present there before.
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a bag containing 0 oc ice is much more effective in absorbing energy than one containing the same amount of 0 oc water. (a) how much heat transfer is necessary to raise the temperature of 0.800 kg of water from 0 oc to 30.0 oc? (b) how much heat transfer is required to first melt 0.800 kg of 0 oc ice and then raise its temperature?
a)100464 J is the heat necessary to raise the temperature of 0.800kg of water from 0°C to 30°C .
b)125847.2x10³ J is the heat required to first melt and then raise the temperature of ice from 0°C to 30°C .
a)The concept of heat transfer which is a part of thermal properties of fluids that deals with melting, evaporation and sublimation is a prominent topic of discussion for physicists and chemists across the world. This particular concept is thus applied to solve the given question by the formula
Q=ms(ΔT)
m=mass of water
s=specific heat of water=4186 J/kg or 4.186 cal/g
Specific heat of water is the heat required to raise the temperature of 1kg water by 1°C.
T=change in temperature
=0.800 x 4186 J/kg x (30°C-0°C)
=100464 J
b) For melting and raising temperature;
Q=mLf + ms(Δ)T
Here,Lf is latent heat of fusion which is the heat required to convert solid into liquid i.e. 334 kJ/kg .
=0.800kg x 334 kJ/kg x (30°C-0°C)
=125847.2 x 10³ J
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