Answers
Answer:
the answer is D. Because the 1 atm pressure of water is 40.65 or 40.7.
226 kJ energy does it take to boil 100 mL of water. 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.
226 kJ energy does it take to boil 100 mL of water because 1 atm pressure of water is 40.65 or 40.7.
Hence, option D is correct.
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Related Questions
How many atoms are in 8g of Oxygen (O2)?
Answers
Answer:
There are 3.011 × 10^23 oxygen atoms
Rough ER is connected to the nucleus membrane and to
Answers
Rough ER is connected to the nuclear membrane and is responsible for the synthesis and processing of proteins.
The rough endoplasmic reticulum (ER) is a network of membrane-bound sacs and tubules that is studded with ribosomes on its surface. These ribosomes are responsible for protein synthesis. The rough ER is connected to the nuclear membrane because it receives instructions for protein synthesis from the DNA in the nucleus. This connection allows for the efficient transfer of genetic information from the nucleus to the rough ER.
Once the ribosomes on the rough ER synthesize proteins, the rough ER is also involved in the processing and modification of these proteins. It helps in folding the newly synthesized proteins into their functional three-dimensional shapes and also adds various modifications such as glycosylation (the addition of sugar molecules) or signal sequences that target the proteins to specific locations within or outside the cell.
After processing, the proteins may be transported to other parts of the cell or exported to the cell membrane or extracellular space. The connection between the rough ER and the nuclear membrane ensures a coordinated flow of genetic information and protein synthesis, allowing the cell to efficiently carry out its functions.
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How many protons, neutrons, and electrons are in Phosphorous-33?
Answers
Answer:
It has 17 protons, 17 electrons, and 18 neutrons/ 35 protons, 35 electrons, and 17 neutrons. 21. Phosphorus-33 (atomic number 15) contains 18 neutrons/ 18 protons
Study each picture that depicts the involvement of a particular gland in the endocrine system. Write down the name of the endocrine gland and explain its effect, according to its function.
Answers
The thyroid gland produces and secretes two hormones, thyroxine (T4) and triiodothyronine (T3), which are involved in regulating the body's metabolism.
What is thyroid gland?The thyroid gland is regulated by the pituitary gland, which secretes thyroid-stimulating hormone (TSH). When TSH binds to receptors on the thyroid gland, it stimulates the production and secretion of T4 and T3. These hormones play an important role in the growth and development of the body's tissues and organs, including the brain, heart, and muscles.
What is hyperthyroidism?If there is an overproduction of thyroid hormones, it can lead to hyperthyroidism, which can cause symptoms such as weight loss, nervousness, and rapid heartbeat. On the other hand, an underproduction of thyroid hormones can lead to hypothyroidism, which can cause symptoms such as fatigue, weight gain, and cold intolerance.
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Balance the chemical equations.
1FeCl3 + KOH → Fe(OH)3 + KC1
Answers
Answer:
FeCl3 + 3KOH → Fe(OH)3 + 3KCl
Explanation:
Which refers to the passing of a wave through an object?
sound
O interference
O transmission
O frequency
O sound
Answers
The term that refers to the passing of a wave through an object is "transmission."
Transmission refers to the process by which a wave passes through an object or medium. In the context of sound, transmission occurs when sound waves travel through different substances, such as air, water, or solids.
When a sound wave encounters an object, it can be transmitted through it, reflected off it, or absorbed by it, depending on the properties of the object and the medium through which the sound is traveling.
For example, when you speak into a microphone, the sound waves produced by your voice travel through the air and are transmitted to the microphone's diaphragm. The diaphragm converts the sound waves into electrical signals, which can then be amplified and reproduced as sound through speakers.
In summary, transmission is the term used to describe the passage of a wave, such as a sound wave, through an object or medium. It is an essential concept in understanding how waves interact with their surroundings and how sound propagates through different materials.
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Starting with 0.3500 mol CO(g) and 0.05500 mol COCl2(g) in a 3.050 L flask at 668 K, how many moles of CI2(g) will be present at equilibrium?
CO(g) + Cl2(g)》COCl2(g)
Kc= 1.2 x 10^3 at 668 K
Answers
At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.
1: Write the balanced chemical equation:
\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)
2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.
Initial:
\(C_O\)(g) = 0.3500 mol
\(Cl_2\)(g) = 0.05500 mol
\(C_OCl_2\)(g) = 0 mol
Change:
\(C_O\)(g) = -x
\(Cl_2\)(g) = -x
\(C_OCl_2\)(g) = +x
Equilibrium:
\(C_O\)(g) = 0.3500 - x mol
\(Cl_2\)(g) = 0.05500 - x mol
\(C_OCl_2\)(g) = x mol
3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:
Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]
4: Substitute the given equilibrium constant (Kc) value into the expression:
1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)
5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:
1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x
6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.
7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.
8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):
\(Cl_2\)(g) = 0.05500 - x
9: Calculate the value of \(Cl_2\)(g) at equilibrium:
\(Cl_2\)(g) = 0.05500 - x
\(Cl_2\)(g) = 0.05500 - (positive value of x)
10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.
Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.
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What is the molar mass
MgCrO4
Answers
The molar mass of MgCrO4 is approximately 140.30 g/mol.
To determine the molar mass of MgCrO4 (magnesium chromate), we need to calculate the sum of the atomic masses of each individual element in the compound.
The chemical formula MgCrO4 indicates that the compound consists of one magnesium atom (Mg), one chromium atom (Cr), and four oxygen atoms (O).
The atomic masses of the elements can be found on the periodic table:
Magnesium (Mg) has an atomic mass of approximately 24.31 g/mol.
Chromium (Cr) has an atomic mass of around 51.99 g/mol.
Oxygen (O) has an atomic mass of about 16.00 g/mol.
Now, we can calculate the molar mass of MgCrO4 by summing up the atomic masses of each element, considering the respective subscripts:
Molar mass = (Atomic mass of Mg) + (Atomic mass of Cr) + 4 × (Atomic mass of O)
Molar mass = (24.31 g/mol) + (51.99 g/mol) + 4 × (16.00 g/mol)
Molar mass = 24.31 g/mol + 51.99 g/mol + 64.00 g/mol
Molar mass ≈ 140.30 g/mol
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Dr. Wong's assistant made the observations below while heating a sample of solid hydrogen. Using the data and observations in the table below, create a heating curve for hydrogen that Dr. Wong can reference during his laboratory testing. Be sure to include and label the following items in your heating curve:
Create temperature and time intervals that are appropriate for the data.
Don't start the temperature on the graph at 0 °C because the time intervals will be too large for the hydrogen data.
Label the melting and boiling points on the curve.
Label the three states and the two transition phases on the curve.
Heating data:
Time (Minutes) Observations
0:00–2:43 Hydrogen is a solid at −263 °C. Heat is added to sample.
2:43–6:15 Hydrogen begins to change into a liquid at −259 °C.
6:15–10:36 Temperature of the liquid begins to increase.
10:36–14:01 Hydrogen begins to form a gas at −253 °C.
14:01–18:00 Temperature of the gas begins to increase.
18:00 Final temperature of hydrogen gas is −245 °C.
Answers
Using the given observations the hydrogen heating curve can be constructed as follows:
Temperature (°C) | State of Hydrogen
-263 | Solid-259 | Melting (Solid to Liquid)-253 | Boiling (Liquid to Gas)-245 | GasBy subtracting the start time from the end time for each step, one can calculate the time interval:
Solid: 0:00 – 2:43 (2 minutes 43 seconds)Melting: 2:43 – 6:15 (3 minutes 32 seconds)Liquid heating: 6:15 – 10:36 (4 minutes 21 seconds)Boiling: 10:36 – 14:01 (3 minutes 25 seconds)Gas heating: 14:01 – 18:00 (3 minutes 59 seconds)On the curve, the melting point and boiling point of hydrogen are shown as -259°C and -253°C, respectively. The curve can also be used to represent the three states of matter (solid, liquid, and gas) as well as the two transitional phases (melting and boiling).
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1. As an electron in an atom moves from a higher energy state to a lower energy state, the atom
(A) becomes a negative ion
(C) releases energy
(B) becomes a positive ion
(D) absorbs energy
Answers
Answer:
(C) releases energy
Explanation:
From Bohr's model of the atom, we can understand the energy transitions involved when an electron moves from one energy level to another.
An electron in an energy level has a definite amount of energy associated with it at that level. When electrons change state, they must absorb or emit the exact amount of energy which will bring them from initial to final states. When the electron is excited, it moves from the ground state to an excited state, it must must absorb energy. On returning from an excited state, energy is emitted.(C) releases energy
From Bohr's model of the atom:
We can understand the energy transitions involved when an electron moves from one energy level to another.
An electron in an energy level has a definite amount of energy associated with it at that level. When electrons change state, they must absorb or emit the exact amount of energy which will bring them from initial to final states. When the electron is excited, it moves from the ground state to an excited state, it must must absorb energy. On returning from an excited state, energy is released or emitted.Therefore, option C is correct.
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Hãy tính pH của dung dịch thu được khi trộn 20 mL NaOH 0,1 M và 10 mL
CH3COOH 0,1 M. Biết pKa (CH3COOH) = 4,75.
Answers
Answer:frh
Explanation:
What was the unknown metal?
Answers
Answer:
is there a picture or something?
Explanation:
Explanation:
Your question is incomplete please update it.
The average weather conditions affecting a biome is called ____.
precipitation
tundra
temperate condition
Climate
Answers
If you wanted to make .5 L of a 1 mole/L (M) of MgSO4 solution, how many grams of MgSO4 would you use?
Answers
Answer:
0.5 grams
Explanation:
Your aunt is sipping on iced tea and fanning herself during a hot South Carolina summer day. You tell her that there is enough energy in one drop of her iced tea to run the air conditioner for the rest of her life if the energy could be extracted with 100% efficiency. Your aunt asks you to explain. Use the concepts you learned in this unit to explain the relationship between forces, energy, and matter.
Answers
Answer:
Isn't this like having enough energy to supply the world for centuries with just 1% of the sea's force?
Explanation:
I guess it's because the amount of energy in it can supply energy.
If 27.37ml of 0.2115M NaOH is able to neutralize 37.45 of HCl, what is the concentration of the acid?
Answers
You just gotta match the moles:
moles of NaOH = 0.02737 L * 0.2115 M = 0.005789 mol of NaOH. The amount of moles of HCl it can neutralize should be the same since they are in a 1:1 ratio. Therefore, you can do moles of NaOH divided by 0.003745L to get the answer. It turns out to be 0.1546M.
The compound iron oxide can exist with either iron(II) ions or iron(III) ions. Conduct Internet research to learn about the differences between iron(II) oxide and iron(III) oxide. Give the chemical formula for each compound. Describe their appearance and uses. Based on your findings, are these two forms of the same compound, or are they two completely different compounds?
(What goes in the 6 empty spaces?)
Answers
Based on our finding these two compounds are not same they are completely different from each other as Formula of both compounds are different, their appearance is also different from each other.
What is Iron (II) Oxide ?The formula of the Iron II oxide is FeO. Common name of Iron (II) Oxide is Ferrous Oxide. Iron (II) Oxide is a black colored powder. The mineral form of Iron (II) oxide is known as Wustite. Iron (II) Oxide is used as a pigment. It is also used to make dyes.
What is Iron (III) Oxide ?The formula of the Iron (III) Oxide is Fe₂O₃. Common name of Iron (III) Oxide is Ferric oxide. Iron (III) Oxide appears as Red-Brown solid. It is also known as Hematite. Iron (III) oxide is used as pigments. It is used in dental composites , cosmetics. It is also used to apply the final polish on metallic jewellery.
Thus from the above conclusion we can say that Based on our finding these two compounds are not same they are completely different from each other as Formula of both compounds are different, their appearance is also different from each other.
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Need help on 15,16,17,18, and 19. Only if you know them please.
Answers
Answer:
A, B, C, D, and A
Explanation:
hope this helps
Brainliest will be rewarded!
Answers
Option B, where [OH-] is 1.0 x 10-13 mol dm-³3, is the only one that can be considered basic. Therefore, Option B is the correct answer.
To determine whether a solution is basic or acidic at 25 °C, we can compare the concentration of hydroxide ions ([OH-]) with the concentration of hydronium ions ([\(H_3O\)+]). In a neutral solution, the concentrations of [\(H_3O\)+] and [OH-] are equal, resulting in a pH of 7.
Option A states that the concentration of [\(H_3O\)+] is 1.0 x 10-3 mol dm-3. Since [\(H_3O\)+] represents the concentration of hydronium ions, this solution would be acidic because the concentration of [\(H_3O\)+] is higher than [OH-], indicating an excess of hydronium ions.
Option B states that the concentration of [OH-] is 1.0 x 10-13 mol dm-³3. In this case, [OH-] is higher than [\(H_3O\)+], indicating an excess of hydroxide ions. Therefore, this solution would be considered basic.
Option C states that the solution has a pH of 4.00. A pH of 4.00 is below the neutral pH of 7, indicating an excess of hydronium ions and an acidic solution. Therefore, this option does not represent a basic solution.
Option D states that the concentration of [\(H_3O\)+] is 1.0 x 10-13 mol dm-3. Similar to Option A, this concentration of [\(H_3O\)+] indicates an acidic solution, not a basic one.
Option B
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Answer:
D is the correct answer
Explanation:
In order for a solution to be basic at 25 C, the H+ concentration has to be less than the OH- concentration, and given that H+ times OH- is 10^-14, we deduce that H+ must be less than 10^-7 for the solution to be acidic. Thus, A can be eliminated, and so can C. With B, we calculate an H+ concentration of 0.1M, which also fails to be less than 10^-7
Thus, D is the correct answer and we can verify that as H+ is less than 10^-7.
Note: I do not know why my previous answer was deleted for "being incorrect", and i'm not sure how the incorrect answer was "expert verified", but I am as certain that D is the correct answer as i am sure of 3*(4+5-1) being equal to 24.
how do one get this solution
-log10 (2* 10^-2)
Answers
The result of the computation when you follow the steps is 1.699.
A logarithm is a mathematical function that represents the exponent or power to which a specific base must be raised to obtain a given number. In simpler terms, it answers the question: "To what power must we raise a base number to obtain a certain value?"
What you should do is that on your calculator, you could press the logarithm key and then put in the value that has been shown and then the result would be displayed on your calculator.
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what are the three important properties of acids
Answers
Calculate the number of molecules in 4.99 Mol of Methane .
Answers
Answer:
3.003 × 10²⁴ moleculesExplanation:
The number of molecules can be found by using the formula
N = n × L
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
N = 4.99 × 6.02 × 10²³
We have the final answer as
3.003 × 10²⁴ moleculesHope this helps you
Which of the following represents the electronic structure of three elements in the periodic table
A. 2.8.1 2.8.3 2.8.4 B. 2.8 2.8.1 2.8.2
C. 2.7 2.8 2.8.1 D. 2.1 2.8.1 2.8.8.1
Answers
Answer:
a
Explanation:
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What is the hardest things in the world
Answers
Answer:
Diamond is the hardest things in the world
What is the engine piston displacement in liters of an engine whose displacement is listed as 490 in^3?
Answers
Answer:
490 in^3 = 8.03 L
Explanation:
Given:
The engine displacement = 490 in^3
= 490 in³
To determine the engine piston displacement in liters L;
(NOTE: Both in^3 (in³) and L are units of volume). Hence, to find the engine piston displacement in liters (L), we will convert in^3 to liters (L)
First, we will convert in³ to cm³
Since 1 in = 2.54 cm
∴ 1 in³ = 16.387 cm³
If 1 in³ = 16.387 cm³
Then 490 in³ = (490 in³ × 16.387 cm³) / 1 in³ = 8029.63 cm³
∴ 490 in³ = 8029.63 cm³
Now will convert cm³ to dm³
(NOTE: 1 L = 1 dm³)
1 cm = 1 × 10⁻² m = 1 × 10⁻¹ dm
∴ 1 cm³ = 1 × 10⁻⁶ m³ = 1 × 10⁻³ dm³
If 1 cm³ = 1 × 10⁻³ dm³
Then, 8029.63 cm³ = (8029.63 cm³ × 1 × 10⁻³ dm³) / 1 cm³ = 8.02963 dm³
≅ 8.03 dm³
∴ 8029.63 cm³ = 8.03 dm³
Hence, 490 in³ = 8029.63 cm³ = 8.03 dm³
Since 1L = 1 dm³
∴ 8.03 dm³ = 8.03 L
Hence, 490 in³ = 8.03 L
An engine piston displacement of 490 in³ is equivalent to 8.03 L.
The engine piston displacement is 490 in³ and we want to convert it to liters. Since both of them are units of volume, we will need one or more conversion factors.
What is a conversion factor?A conversion factor is an arithmetical multiplier for converting a quantity expressed in one set of units into an equivalent expressed in another.
Step 1: Convert 490 in³ to cm.We will use the conversion factor 1 in = 2.54 cm.
490 in³ × (2.54 cm/1 in)³ = 8.03 × 10³ cm³
Step 2: Convert 8.03 × 10³ cm³ to L.We will use the conversion factor 1 L = 1000 cm³.
8.03 × 10³ cm³ × (1 L/1000 cm³) = 8.03 L
An engine piston displacement of 490 in³ is equivalent to 8.03 L.
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Selma made an error while creating a chart to describe the technological design process for a new vacuum.
Which best describes how Selma can correct the error in her chart?
Change “Identify a need” to “Identify a problem.”
Switch the descriptions for “Identify a need” and “Evaluate the solution.”
Change “Implement the solution” to “Test the prototype.”
Switch the stages “Evaluate the solution” and “Design a solution.”
Answers
The statement which best describes how Selma can correct the error in her chart is: Switch the stages “Evaluate the solution” and “Design a solution.”
What is a design process?A design process can be defined as the strategic process through which a conceptual solution is generated and developed to solve a complex problem, especially based on a set of requirements.
This ultimately implies that, requirements forms an integral part of a design process and it is important that designers adhere strongly to the requirements when they are designing and developing any system.
In this scenario, the error in Selma's design process is misplacing or interchanging the “Design a solution.” and “Evaluate the solution” because designing a solution must come before an evaluation of the solution.
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An ion of iron has an 26 protons, 30 neutrons, and 23 electrons. What is
its atomic number ?
Answers
Answer:
26
Explanation:
The atomic number of an atom describes the number of protons within its nucleus. Since the ion has 26 protons, the atomic number must be 26.
How many moles of H₂ are required to produce -8301 kJ of heat in the following reaction?N₂ (g) + 3 H₂ (g) → 2 NH₃ (g) ∆H° = -91.8 kJ/mol
Answers
Explanation:
N₂ (g) + 3 H₂ (g) ---> 2 NH₃ (g) ∆H° = - 91.8 kJ/mol
According to the ∆H° of reaction, when 1 mol of NH₃ is produced -91.8 kJ are released. We have to find the moles of H₂ nequired to produce -8301 kJ.
First we have to calculate the number of moles of NH₃ that should be produced in order to release that amount of heat.
moles of NH₃ = -8301 kJ * 1 mol/(-91.8 kJ)
moles of NH₃ = 90.42 mol
According to the coefficients of the reaction's equation 2 moles of NH₃ will be produced by 3 moles of H₂. The molar ratio between H₂ and NH₃ is 3 to 2. We can use that relationship to find the answer to our problem.
3 moles of H₂ = 2 moles of NH₃
moles of H₂ = 90.42 moles of NH₃ * 3 moles of H₂/(2 moles of NH₃)
moles of H₂ = 135.6 moles
Answer: 135.6 moles of H₂ are required.
In science class, the students planned and conducted an investigation to learn about specific heat capacity. They collected data and created the following data table:
Data Table
Material | Specific heat capacity (cal/g/°C)
Dry soil | 0.2
Water | 1
Oil | 0.4
Use these data and the concept of hydrogen bonding to explain why water has such a high specific heat capacity. Then, apply this idea to explain why coastal areas and those near large bodies of water have much more moderate climates than inland areas.
Answers
The presence of large bodies of water helps to stabilize temperature changes in coastal areas.
Water has a high specific heat capacity due to the presence of hydrogen bonding between its molecules. Hydrogen bonding occurs when the positively charged hydrogen atom of one water molecule is attracted to the negatively charged oxygen atom of another water molecule. This bonding is stronger than the typical intermolecular forces found in other substances.
Hydrogen bonding in water requires a significant amount of energy to break, which leads to the high specific heat capacity of water. This means that water can absorb and store a substantial amount of heat energy without a significant increase in temperature. Conversely, when water loses heat, it releases a significant amount of energy before its temperature decreases.
In coastal areas and regions near large bodies of water, the high specific heat capacity of water plays a crucial role in moderating climates. Water acts as a heat sink, absorbing heat during the day and releasing it at night. This leads to milder temperature fluctuations compared to inland areas, which have lower specific heat capacities. As a result, coastal regions experience cooler summers and warmer winters, providing a more moderate climate overall.
The presence of large bodies of water helps to stabilize temperature changes in coastal areas, providing a buffering effect and contributing to the moderation of the climate.
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Does water take up space (have volume)? Yes or no
Answers
Answer:
Yes
Explanation: