The total heat that is involved in this change is 23632.5 J.
What is the energy involved?We know that energy is involved as matter is changing from one state to another and in this case what we have is a 75g sample of liquid water at 10°C ends up as ice at -10°C.
There are are about three steps of the change in the energy;
1) Heat required until the water would change to ice
2) Latent heat of fusion of ice
3) Heat required until the temperature drops to -10°C
Thus;
1) H = mcdT
m = mass of the water
c = specific heat capacity of water
dT = temperature change
H = 75 * 4.18 * (0 - 10)
H = -3135 J
2) Heat of fusion =
H = mL
m = mass of ice
L = latent heat of fusion of ice
336 J g^-1 * 75g
= 25200 J
3) Heat required to decrease the temperature futher
H = 75 * 2.09 * (0 - (-10))
H = 1567.5J
Total heat required = 25200 J + 1567.5J -3135 J
= 23632.5 J
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Please and thank you
Answer:
A
Explanation:
.
Complete the equation for cellular respiration:
________ + sugar → ________ + water
oxygen, carbon dioxide
carbon dioxide, oxygen
ATP, light energy
chlorophyll, mitochondria
The equation for cellular respiration is in the given choices is option A. oxygen + sugar → carbon dioxide + water
Cellular respiratory is a chain of chemical reactions that smash down glucose to produce ATP, which may be used as power to energy many reactions throughout the body. There are 3 predominant steps of mobile respiratory: glycolysis, the citric acid cycle, and oxidative phosphorylation.
Cellular respiration is the process by the way which organic fuels are oxidized in the presence of an inorganic electron acceptor along with oxygen to provide massive quantities of power, to power the bulk manufacturing of ATP.
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A 0.0020 M solution of the sodium salt of an unknown monoprotic weak acid has a measured pH
of 7.50. What is the identity of the weak acid?
The weak (monoprotic) acid splits into its conjugate base and a proton; because the protons originated from the weak acid, the conjugate base that forms must be equimolar with the protons released into the solvent.
HA⇌A +H+
How can you tell whether kind of acid is a weak acid?
Based on its molar mass, pKa (determined from points on a titration curve), combined with its approximative melting point, you can determine your weak acid.
How can the concentration of an unidentified weak acid be determined?
Purpose: Titration with a standardized NaOH solution is used to determine the composition and identity of an unknown weak acid. where Mt is the titrant's concentration, Vt is its volume, and added titrant, Mx is the amount of the unidentified weak acid that is titrated, Mx is its concentration, and Vx is its volume.
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Express 0.000 000 000 936 in scientific notation.
[?]×10 [?]
Answer: 9.36 × 10^-10
Explanation:
Answer: 9,36 x 10^-12
Explanation:
the a has to be in the range of 0 - 10
to get to 0.000 000 000 936 you have to divide 9,36 by 10, 12 times. As the expression goes.
Hope this was alright :)
most important for successful supply drop design for futura amplify
Answer:
There are a few key factors to consider when designing a successful supply drop for Futura Amplify:
1. Make sure the drop is easily accessible for the intended recipients. If it is too difficult to reach, they may not be able to get to it in time.
2. Make sure the drop is large enough to accommodate the supplies you are sending. If it is too small, the supplies may not fit and may be lost or damaged.
3. Make sure the drop is well-protected from the elements. If it is exposed to the elements, the supplies may be damaged or lost.
Explanation:
Make sure the recipients of the drop can easily access it.
What is amplifier?Amplifier is defined as a piece of electrical equipment that reacts to a variety of tiny input signals like power, voltage, or current. To raise a signal's amplitude, amplifiers are used in computers, audio equipment, music equipment, and electronic devices like television and radio receivers. Without altering the frequency or wave shape of the waveform, an amplifier is used to boost the amplitude of a signal waveform.
They might not be able to get there in time if it is too challenging to get to. To ensure that the materials you are shipping fit, make sure the drop is big enough. The materials might not fit and could be damaged or lost if it is too tiny. Ensure that the drop is adequately shielded from the elements. The goods could become lost or destroyed if they are exposed to the elements.
Thus, make sure the recipients of the drop can easily access it.
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Molecules can have each of these forms of energy, except:
A. light energy
B. Chemical energy
C. Sound energy
D. Kinetic Energy
Please help me with this question
Molecules can any forms of energy, except light energy.
What is Energy?The ability to do work is called as energy. Work done is product of force and displacement. Energy is of different types as sound energy, kinetic energy, potential energy, electrical energy, light energy etc.
Law of conservation of energy states that energy can neither be created nor destroyed, but it can be transferred from one form to another.
Molecules can move so they show kinetic energy, molecules can be there at many positions so they can show potential energy, molecules can vibrate so they can show sound energy but molecules can only absorb light hence they can't have light energy.
Given options are-
A. light energy
B. Chemical energy
C. Sound energy
D. Kinetic Energy
Therefore, Molecules can any forms of energy, except light energy.
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What is the name of the compound Si5F7?
A. Pentasilicon hexafluoride
B. Sulfur fluoride
C. Pentasilicon heptafluoride
D. Silicon fluoride
Answer:
i think sulfur fluoride
The small, but important, energy differences between 3s, 3p, and 3d orbitals are due mainly to.
The small, but important, energy differences between 3s, 3p, and 3d orbitals are due mainly to Heisenberg uncertainty principle.
A small but important difference between 3s, 3p, and 3d are due mainly to the Heisenberg uncertainty principle. Their principal quantum number ones rule and the number of weapons that can hold the penetration effect.
An electron in the 3s orbital is more likely to be close to the nucleus than is an electron in the 3p orbital; an electron in the 3p orbital, in turn, has a greater probability of being close to the nucleus than does one in the 3d orbital.
Therefore, degenerate orbitals are those orbitals that have the same energy. As given in the above representation, 2s and 2p orbitals are degenerate; 3s, 3p and 3d orbitals are degenerate, and so on. The degeneracy of the orbitals breaks down in the case of multi-electron systems.
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Besides nylon, what other product is formed from the reaction of adipoyl chloride and 1,6-diaminohexane?.
Besides nylon, HCl is formed from the reaction of adipoyl chloride and 1,6- diaminohexane , but HCl is the byproduct molecule.
What is formed when adipoyl chloride and 1,6-diaminohexane reacts with each other and what are the by products?Adipoyl chloride is the monomer and hexamethylinediamine is also the monomer which reacts together to form polymer.
The polymer formed is named nylon6,6 which is a co polymer and nylon 6,6 find its use in various other activities of life.
Nylon6,6 is a copolymer since the participation of two monomers , and not a single monomer undergoing decomposition.
Nylon6,6 is formed with an elimination of small molecule of HCl which is considered to be a by product .
It is formed by a condensation reaction and hence HCl is the product formed from the reaction of adipoyl chloride and 1,6- diaminohexane.
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(DO THIS ONE NOT THE OTHER) The element Chromium has 4 naturally occurring isotopes. Use the relative abundance of each to calculate the average atomic mass of chromium. (Must show work!)
Cr-50 = 4.34%, Cr-52 = 83.79%, Cr-53 = 9.50%, Cr-54 = 2.37%
A student that is sheltering in place during the COVID-19 pandemic, was told to test three
different colors of markers. The student placed three different colors on a sheet of
chromatography paper, as shown in the diagram. The student also tested a different color of
marker, labeled the “unknown” to determine if the color marker was made from other colors.
The student prepares the experimental setup by using chromatography paper (a polar material)
and putting the paper in a nonpolar solvent. The results of the experiment (the “developed
chromatograms” are shown on the right.
(1) Which color of marker is the least polar? Justify your answers in terms of the IMF
interactions between the color dyes and the solvent or between the color dyes and the
paper.
(2) Which dye(s) is/are present in the unknown sample? Justify your answer.
(3) What was the most likely color of marker that the student tested?
The color of marker that is the least polar is the red dye because it shows the least interaction with the polar chromatography paper and the most interaction with the non-polar solvent.
The dyes that are most likely in the unknown sample are the blue and yellow dyes because the two spots produced by the unknown sample traveled almost the same distance as the blue and yellow dyes.
The most likely color of marker that the student tested is yellow.
What is chromatography?Chromatography is a separation technique used to separate colored substances by means of their interactions with mobile solvent phase and a non-mobile solid phase.
The dye that has the most interaction with the solvent phase will travel farther in the chromatographic column whereas the dye that has the least interaction with the solvent will travel the least distance.
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How may grams of oxygen(O2) gas are there in a 50.0 L tank at 21.0c when the oxygen pressure is 15.7 atm?
Explanation:
Using Ideal Gas Equation
PV=nRT
P = 15.7, V = 50L, T = 21 +273= 294K, n=?, R= 0.8206atmK^-1mol^-1
n = PV/RT = (15.7 × 50) / (0.8206 × 294) = 3.25mol
n = m/M, m=?, M= 16(2) = 32, n = 3.25
m = nM = 3.25 × 32 = 104g
104 grams of oxygen (O2) gas are there in a 50.0 L tank at 21.0c when the oxygen pressure is 15.7 atm.
What is an ideal gas equation ?Ideal gas is also called as real gas. The ideal gas equation is PV = nRT. Where, P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature in Kelvin.
Ideal gas molecules do not attract or repel each other. The pressure of a gas times its volume same to the number of moles of the gas times a constant (R) times the temperature of the gas.
By using Ideal Gas Equation
PV = nRT
Pressure = 15.7,
Volume = 50L,
Temperature = 21 +273
= 294K,
n=?,
R= 0.8206atmK^-1mol^-1
n = PV/RT
= (15.7 × 50) / (0.8206 × 294)
= 3.25mol
n = m/M, m=?,
M= 16(2)
= 32, n = 3.25
m = nM
= 3.25 × 32 = 104g
Thus, 104g grams of oxygen (O2) gas are there in a 50.0 L tank at 21.0c when the oxygen pressure is 15.7 atm.
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Calculate the relative molecular mass of CuSo4
Mass of Cu = 63.5
Mass of S = 32
Mass of O = 4
Total molecular mass = 63.5 + 32 + 16 × 4 = 159.5 amu
Wine goes bad soon after opening because the ethanol CH3CH2OH in it reacts with oxygen gas O2 from the air to form water H2O and acetic acid CH3COOH, the main ingredient of vinegar.
What mass of oxygen gas is consumed by the reaction of 5.30g of ethanol?
The mass of oxygen gas consumed if 5.30 g of ethanol is involved in the reaction would be 3.68 grams.
Stoichiometric problemThe souring of wines through the reaction of the ethanol component with oxygen is a chemical reaction that is expressed by the following equation:
[tex]CH_3CH_2OH + O_2 -- > H_2O + CH_3COOH[/tex]
The equation already obeys the law of conservation of mass. Thus, it is a balanced reaction in which the mole ratio of the ethanol that reacts and the oxygen that is consumed is 1:1.
If, mole = mass/molar mass; the mole of 5.30 g of ethanol can be deduced as follows:
Molar mass of ethanol = 46.07 g/mol
Mole of 5.30 g ethanol = 5.3/46.07
= 0.1150 mol
Since the mole ratio of ethanol and oxygen is 1:1, the equivalent mole of oxygen that is consumed in the reaction would also be 0.1150 mol.
If, mass = mole x molar mass; then the mass of 0.1150 mol oxygen can be deduced as follows:
Molar mass of oxygen = 32 g/mol
Mass of 0.1150 mol oxygen = 0.1150 x 32
= 3.68 grams
Thus, the mass of oxygen that will be consumed by the reaction of 5.30 grams of ethanol is 3.68 grams.
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Which physical property allows iron to be easily separated from most other materials
The physical property that allows iron to be easily separated from most other materials is magnetism.
Metals that naturally attract magnets are known as ferromagnetic metals. These magnets tend to firmly stick to these metals. For example when you rub a piece of iron along a magnet the north seeking poles of the atoms get lined up in one direction. This causes a force to build up a force and this force creates a magnetic field. This is how a piece of iron becomes a magnet.
To explain the magnetism of iron we can take example iron present in sand, it was seen that the iron filings are attracted to the magnet and the sand is not. This allowed us to separate the iron filings from the sand.
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A student is investigating thermal energy transfer. The student places two copper blocks, Block 1 at 40°C and the Block 2 at 20°C, next to each other so they make contact. They are allowed to sit in an isolated system until energy transfer has completed. Which picture shows the final temperatures of the blocks?
Answer:
Explanation:
tt
Decide whether each statement is supported by each scientist's atomic model.
Dalton's
atomic
model
Thomson's
atomic
model
Rutherford's
atomic
model
Atoms are the smallest Atoms contain negative An atom contains a
particles.
particles.
nucleus.
Select...
Select...
Select...
>
→
Select...
Select...
Select.
>
Select...
Select...
Select.
Atoms cannot be created or destroyed.
Atoms cannot be broken down into smaller pieces.
All atoms of an element are identical.
Chemical reactions cause atoms to be rearranged.
Electrons have a negative charge. Atoms usually contain an equal number of positively charged protons and negatively charged electrons. Protons and neutrons make up the atomic nucleus or nucleus, and small electrons cloud the nucleus. Protons and neutrons can be further broken down and both are made up of so-called quarks.
Atoms consist of a central nucleus surrounded by one or more negatively charged electrons. The nucleus is positively charged and contains one or more relatively heavy particles known as protons and neutrons. Atoms are the basic building blocks of matter. As far as we know, quarks cannot be broken down into smaller components making them the smallest we know of.
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"What is the hybridization of the central atom in each of the following?
(a) BeH2
(b) SF6
(c) PO43−
(d) PCl5"
Answer:
BeH2=sp
SF6=sp3d2
PO43−=sp3
PCl5=dsp3
Explanation:
The hybridization states of each of the central atoms are;
a) sp
b) [tex]sp^3d^2[/tex]
c)[tex]sp^3[/tex]
d) [tex]sp^3d[/tex]
What is hybridization?When we talk about the idea of hybridization in chemistry what we are talking about is the way that there could be the mixing of the orbitals so that we could obtain the orbitals that have the kind of energy that is required for a reaction to occur.
In this case, we know that the hybridization of the central atom would determines the shape of the molecule and this is a very important thing to know.
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What is the mass of 4.23 × 10^24 molecules of oxygen?
Taking into account the definition of Avogadro's Number and molar mass, the mass of 4.23×10²⁴ molecules of oxygen is 112.37 grams.
Definition of Avogadro's Number
Avogadro's Number is called the number of particles that make up a substance (usually atoms or molecules). This can be found in the amount of one mole of said substance and its value is 6.023×10²³ particles per mole.
Avogadro's number applies to any substance.
Definition of molar massThe molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.
Mass of 4.23×10²⁴ molecules of oxygenYou can apply the following rule of three: if 6.023×10²³ molecules are contained in 1 mole of oxygen, then 4.23×10²⁴ molecules are contained in how many moles of oxygen?
amount of moles of oxygen= (4.23×10²⁴ molecules × 1 mole)÷ 6.023×10²³ atoms
amount of moles of oxygen= 7.023 moles
7.023 moles of oxygen are 4.23×10²⁴ molecules of oxygen.
Being 16 g/mole the molar mass of oxygen, the mass of oxygen in 7.023 moles is calculated as:
mass of oxygen= 7.023 moles×16 g/mole
mass of oxygen= 112.37 grams
Finally, a mass of 112.37 grams are present in 4.23×10²⁴ molecules of oxygen.
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If our eyes could see a slightly wider region of the electromagnetic spectrum, we would see a fifth line in the Balmer series emission spectrum. Calculate the wavelength λ
λ
associated with the fifth line.
Wavelength will be 397 nm.
Balmer series lines are transitions from n > 2 to m = 2
The fifth line is from n = 7 to m = 2
1/λ = R(1/m2 - 1/n2)
= 1.097 x 107 x (1/22 - 1/72)
= 2.519 x 10-6
λ = 1/2.519 x 10-6
= 3.97 x 10-7 m
= 397 nm
The electromagnetic spectrum is the variety of frequencies of electromagnetic radiation and their respective wavelengths and photon energies.
Electromagnetic strength travels in waves and spans a huge spectrum from very long radio waves to very quick gamma rays. The human eye can only detect a small portion of this spectrum and this sprctrum is called visible light. A radio detects a exclusive part of the spectrum, and an x-ray system makes use of but some other portion.
Generally electromagnetic radiation is classed by way of wavelength into:
* Radio wave, * Ultraviolet rays
* Microwave, * X-rays
* Infrared rays * Gamma rays.
* Visible light,
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How many moles of O2 were produced in a decomposition reaction of H2O2 if the pressure was 0.978 atm, the temperature was 27C and the volume of O2 gas collected was 0.082L
The number of mole of O₂ produced from the decomposition of H₂O₂ is 0.0033 mole
How to determine the number of mole of O₂ producedWe'll begin by obtaining the mole of H₂O₂ that decomposed. This is obatined as follow:
Pressure (P) = 0.978 atmTemperature (T) = 27 °C = 27 + 273 = 300 KVolume (V) = 0.082 LGas constant (R) = 0.0821 atm.L/Kmol Mole of H₂O₂ (n) =?PV = nRT
Divide both sides by RT
n = PV / RT
n = (0.978 × 0.082) / (0.0821 × 300)
n = 0.0033 mole
Finally, we shall determine the number of mole of O₂ produced. This is illustrated below
H₂O₂ -> H₂ + O₂
From the balanced equation above,
1 mole of H₂O₂ decomposed to produce 1 moles of O₂
Therefore,
0.0033 mole of H₂O₂ will also decompose to produce = 0.0033 mole of O₂
Thus, number of mole of O₂ produced from the reaction is 0.0033 mole
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Hi can someone please help me on 3 and 4 i need help don’t understand a clue lol! thank youuuuu
3. The set of n=6, l=1, [tex]m_{l}[/tex]= +1, [tex]m_{s}[/tex]= +1/2 is valid.
4. The set of n=1, l=1, [tex]m_{l}[/tex]= 0, [tex]m_{s}[/tex]= -1/2 is invalid. The right set is n=1, l=0, [tex]m_{l}[/tex] = 0, [tex]m_{s}[/tex] = +1/2, -1/2
What is quantum number?To define where an electron is located in an associated atom, we utilize a set of precise integers known as quantum numbers. The characteristics of the atomic orbitals and the electrons within them are described by quantum numbers. Four quantum numbers are used to characterize the state of an electron in an atom or ion. Consider them as significant elements in an equation that explains the three-dimensional location of electrons in a specific atom.
Here,
n is principal quantum number,
l is Angular Momentum Quantum Number,
[tex]m_{l}[/tex] is Magnetic Quantum Number,
[tex]m_{s}[/tex] is Spin Quantum Number
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What is the final volume (in mL) of a solution if you have 17.5 g of NH4NO3 and want a concentration of 1.75 M?
The final volume is 30.62L
Volume is the amount of space occupied by a three-dimensional figure as measured in cubic units
Here given data is
NH₄NO₃ = 17.5 g
Concentration = 1.75 M
We have to calculate final volume solution = ?
So Concentration = mass/volume
Volume = concentration × mass
Volume = 1.75 M × 17.5 g
Volume = 30.62L
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40 POINTS TO FIRST PERSON WITH AN ANSWER! PLEASE HURRY!
PHYSICAL CHANGE:
A change that does not involve the formation of new substances.
-------------------------------------------------------------------------------------------------------------
Physical changes are not represented by equations because they do not involve the rearrangement of atoms. Since no new substances are formed, this means that the atoms of the substance are not broken, changed, or rearranged. Unlike chemical changes, physical changes involve a change in the state of matter. For example, the crushing of a soda can. The physical appearance of the object itself changed, but no new substances were created and there weren't any changes to that object's molecular structure, therefore, those changes cannot be represented by equations.
Hope that helps and good luck!
2. How many hydrogen bonds can form between a single ether molecule and water molecules? Draw the structures to explain.
Ether can only form one hydrogen bond per molecule.
What is hydrogen bonding?We know that the hydrogen bond is the kind of bond that occurs when the dipole of water interacts with the dipole that is on another molecule. We can see this in a lot of hydrides of electronegative elements.
We can see that ether has only one electronegative atom and that is oxygen from the image that is shown in the answer. This oxygen atom can interact with the positive end of the dipole in only one water molecule at a time.
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In the image above you see an 8mL graduated cylinder or
the left and an excerpt of a burette on the right. Each
holds a fixed volume of liquid. What are the volume
readings in each of these pieces of glassware? Give your
readings to 2 decimal places.
The volume in the graduated cylinder is
mL
The volume in the burette is
mL.
Answer: graduated cylinder: 4.25
Explanation:
what is the maximum number of electrons in an atom that can have the follow set of quantum numbers?
n=4
l=3
ml=-2
ms= +1//
1 is the maximum number of electrons in an atom that can have the follow set of quantum numbers.
According to Pauli's Exclusion Principle, no two electrons in the same atom can have the same values for all four of their quantum numbers. In other words, no more than two electrons can occupy the same orbital at the same time, and the spins of two electrons in the same orbital must be opposite. Bosons include photons, gravitons, and gluons.
Quantum numbers are the set of numbers used to describe the position and energy of an electron in an atom. There are four types of quantum numbers: principal, azimuthal, magnetic, and spin. There are four quantum numbers in atoms: the principal quantum number (n), orbital angular momentum quantum number (l), magnetic quantum number (ml), and electron spin quantum number.
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The electron configuration of an element is shown below.
1s22s22p5
Name the group this element belongs to in the periodic table and explain your answer.
Based on the electron configuration, explain how many electrons it is likely to receive from the atom of another element during the formation of a bond.
What’s an equation showing the beta decay of the Hydrogen-3
Answer:
Explanation:
Thus, negative beta decay results in a daughter nucleus, the proton number (atomic number) of which is one more than its parent but the mass number (total number of neutrons and protons) of which is the same. For example, hydrogen-3 (atomic number 1, mass number 3) decays to helium-3 (atomic number 2, mass number 3)
At what temperature (in K) will 6.5 moles of gas occupy 1.7 L at 1.3 atm?
the temperature of gas is [tex]4.14^{o}[/tex]K
The temperature can be calculated as follows:
we using the ideal gas Law where PV = nRT, we just need to subtitute the value
PV = nRT where the universal gas constant is 0.082[tex]L.atm.mol^{-1}.K^{2}[/tex]
1.3 atm x 1.7 L = 6.5 moles x 0.082[tex]L.atm.mol^{-1}.K^{2}[/tex] x T
T= [tex]\frac{1.3 atm X 1.7 L }{6.5 X 0.082 L.atm.mol^{-1}K^{-1} }[/tex]
T= [tex]4.14^{o}[/tex]K
hence the temperature of gas in K is [tex]4.14^{o}[/tex]K
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