The curves represent two possible reaction paths for the decomposition of ammonia, NH3- one can conclude correctly from the graph that the heat of the reaction corresponds to which labeled interval (A,B,C,D,E)
how many moles are in 1.5 x 10^20 molecules of NH3?
.249 moles are in 1.5 x 10^20 molecules of [tex]NH_3[/tex].
What is a mole?A mole is a very important unit of measurement that chemists use. A mole of something means you have 602,214,076,000,000,000,000,000 of that thing, like how having a dozen eggs means you have twelve eggs.
To solve this equation, you will use Avogadro's constant (6.02 x 10^23) to convert the number of molecules to moles. we need to divide the molecules given by this constant:
[tex]\frac{1.50 X 10^2^3}{6.02 X 10^2^3}[/tex] = .249
So, the answer is .249 moles.
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What type of energy transformation takes place during cellular respiration? Use complete sentences to explain how energy is conserved during cellular respiration.
In this exercise we will have to explain the transformation of energy in cellular respiration, as:
The type of energy transformation takes is chemical energy and the energy is conserved because The ATP molecule stores energy from cellular respiration and photosynthesis for immediate consumption.
Recalling how cellular respiration works we have:
Cellular respiration is a process by which organisms obtain energy to perform the most diverse activities. Cellular respiration occurs in mitochondria, in the presence of oxygen, and is divided into three steps: glycolysis, the citric acid cycle (or Krebs cycle) and oxidative phosphorylation.How is energy stored in ATP?Energy is stored in the bonds between phosphates. The molecule acts as a cellular currency, that is, it is a convenient form of energy transformation. The ATP molecule stores energy from cellular respiration and photosynthesis for immediate consumption.
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During cellular respiration, chemical energy in glucose is converted to ATP, conserving energy efficiently across glycolysis, the Krebs cycle, and the electron transport chain. Energy conservation ensures no net loss of matter or energy, illustrating a fundamental principle of biology where substances can change form but are never lost.
Explanation:Energy Transformation in Cellular RespirationDuring cellular respiration, the type of energy transformation that takes place involves converting the chemical energy stored in glucose into a form that cells can use, primarily adenosine triphosphate (ATP). This process begins with glucose and oxygen being transformed into carbon dioxide, water, and energy. The conservation of energy during cellular respiration occurs through a series of biochemical reactions that extract energy from glucose and transfer it to ATP, which cells utilize for various functions. The overall process encompasses three main stages: glycolysis, the Krebs cycle (or citric acid cycle), and the electron transport chain.
Conservation of Energy in Cellular RespirationIn cellular respiration, there is no net loss of matter or energy as they are both conserved. Glucose, upon oxidation, releases its energy in a controlled manner through several steps. This released energy is captured in the form of high-energy phosphate bonds in ATP. ATP then serves as a versatile energy currency for the cell, enabling it to perform various tasks such as muscular contractions, nerve impulses, and biosynthesis. The efficiency of this process means energy is conserved within biological systems, maintaining life processes without waste.
Phases of Cellular RespirationThe four phases of cellular respiration are:
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Which statement best describes the role of the sun in creating wind? Question 2 options: The rays of the sun push the air in all directions, creating wind The radiation of the sun reacts with water over the ocean The energy of the sun heats the land and water surfaces unevenly, creating wind The energy of the sun directly heats the gases in Earth's atmosphere, creating wind
The statement best describes the role of the sun in creating wind is "The energy of the sun heats the land and water surfaces unevenly, creating wind".
What is wind?Wind is the movement of air. Sometimes it is fast and sometimes it is slow.
It happens because of pressure differences and it is caused by temperature differences. It is caused by uneven heating of air due to earth's own rotation.
Given options for the role of sun in creating wind are-
The rays of the sun push the air in all directions, creating wind.
The radiation of the sun reacts with water over the ocean.
The energy of the sun heats the land and water surfaces unevenly, creating wind.
The energy of the sun directly heats the gases in Earth's atmosphere, creating wind.
Therefore, The statement best describes the role of the sun in creating wind is "The energy of the sun heats the land and water surfaces unevenly, creating wind".
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The automatic switch found in a electric kettle is consideres an energy saving device. Jow does the automatic switch saves energy?
The automatic switch in an electric kettle saves energy by cutting off power when the water inside boils. By reducing the time over which power is consumed, the automatic switch prevents the kettle from wasting energy.
Explanation:The automatic switch in an electric kettle saves energy by shutting off power to the kettle once the water inside reaches its boiling point. This prevents the kettle from consuming unnecessary power and thereby wastefully heating water that's already boiling. Without the automatic switch, the kettle would continue to draw electricity, converting it to heat, even after the water is boiling. This automation reduces the time over which power is consumed, leading to fewer units of energy used.
An example of this can be likened to a light bulb that is turned off when not in use. Even if it consumes high power, the light bulb does not waste energy because it is only in operation for the necessary period, wherein the automatic switch in the kettle plays the role of a person switching off the light bulb.
So, it is through this method of selectively controlling the 'on' state of the electrical device, the electric kettle in this case, significant energy savings can be realized over time.
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What role do triglycerides serve in the human body?
A. Long term storage of energy
B. Enzymes that catalyze reactions
C. Protective coating for outer tissues
D. Information storage
Answer: Long term storage of energy
Explanation: Triglycerides are the fats or basically lipids which are found in the blood.
They are the source of the long term storage of energy.
They are primarily used as storage of the energy because the its oxidation will produce twice as much energy than the oxidation of the carbohydrates.
Thus it is better to store the energy which we take from the food to store as triglyceride.
Which term names the underground region between where water saturates pores and where it does not? A. water zone B. water table C. aqua zone D. porous zone
Water table is the underground region between where water saturates pores and where it does not.
Answer: B
Explanation
It is known that water is present below the ground. The rocky terrain inside the ground contains water and the water will be filled in the pores between the rocks.
The water filled in the saturated region below the ground is separated from the unsaturated region which is the region above the ground by a surface termed as water table.
The unsaturated region is the soil above the ground and the plants get water from this region.
The water is present in unsaturated region occupy between the pores of rocks and soils but they are loosely filled so that plants can extract water from them.
Then below the ground water table region will be present and below the water table the saturated water region is present.
So water table is the region dividing the saturated and unsaturated water pore regions.
write a sentence to explain mitosis using a skin cell as an example
Final answer:
Mitosis is the process by which skin cells divide to repair damages such as scratches, producing two genetically identical daughter cells, ensuring the integrity and functionality of the skin.
Explanation:
Mitosis is a fundamental process that occurs in somatic cells, such as skin cells, to facilitate growth and repair through the production of identical daughter cells. For example, when you incur a scratch, your body initiates mitosis to produce new skin cells to heal the wound. During mitosis, a skin cell will duplicate its DNA and divide into two new cells, each with the same number of chromosomes as the original cell, ensuring that the repaired skin is genetically identical to the surrounding area. This process is crucial for maintaining the integrity and functionality of our skin, as well as other bodily tissues.
Mitosis is the process of somatic cell division that results in two identical daughter cells. In the case of a skin cell, mitosis is responsible for regenerating new skin cells when you get a cut or scratch.
The collision between reactants is most likely to produce a reaction at point: C or B
True or False every tiny molecule of a sugar cube has the property of a sugar
What kind of energy is required for photosynthesis to occur?
A. Solar energy
B. Energy from nutrients in the ground
C. Energy stored in chemical bonds
D. Thermal energy
A, Solar energy
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C6h12(l)+9O2(g)->6CO2(g)+6h2O(g)
Yes, the reaction is balanced as shown
Since the same number of each type of atom occurs on both sides of the arrow, the reaction in the above chemical equation is balanced. Ensuring that the total mass of reactants and products is equal, the law of conservation of mass is respected.
One molecule of [tex]C_6H_{12[/tex] and nine molecules of oxygen (O₂) can be converted into six molecules of carbon dioxide (CO₂) and six molecules of water (H₂O) by varying the coefficients, resulting in a balanced chemical equation.
Missing parts;
Is the reaction; [tex]C_6H_{12}(l)+9O_2(g)- > 6CO_2(g)+6H_2O(g)[/tex] balanced
(need 12) project due monday!
what are things we use in everyday life that contain minerals (please list the minerals) <3
What characteristic of rivers at their source gives them so much power to shape the land
The power of rivers at their source to shape the land comes from the narrowness of their channels, which results in faster currents and strong hydraulic action.
The characteristic of rivers at their source that gives them so much power to shape the land is primarily due to the narrowness of the channel, resulting in a faster current compared to other parts of the river or stream. This faster current is capable of exerting a strong force, or hydraulic action, on the land, which can lead to significant erosion and geomorphological changes. Hydraulic action occurs when the moving water strikes against the bed and banks of the river channel, compressing water and air into cracks and crevices, exerting enormous pressures, and causing material to break away.
Rivers and streams, from their source to their mouth, continually erode the geosphere, transport sediments, and eventually deposit them, significantly altering the landscapes through which they flow. At the source, rivers are typically colder, clearer, and carry less nutrients, featuring swift currents that can inhibit silt accumulation and support unique ecosystems adapted to these conditions.
Please help me on #7,9,10
In addition to resembling One another, what other criteria of organisms to be grouped in the same species
Answer:
The answer is they reproduce with only one another.
Explanation:
In biology, species is a term that can be defined as a group of organisms that can reproduce with one another and give birth to fertile offspring. In other words, the organisms in one species cannot reproduce with organisms in another species. So, to be considered as part of the species, this criteria is very important.
If Kp = 0.15, which statement is true of the reaction mixture before any reaction occurs?
REDOX WS1
Identify the species being oxidized and reduced in each of the following reactions
a. Cr+1 + Sn+4 Cr+3 + Sn+2
b. 3Hg+2 + 2Fe 3Hg + 2Fe+3
c. 2As + 3Cl2 AsCl3
d. NaBr + Cl2 NaCl + Br2
e. Fe2O3 + 3CO 2Fe + 3CO2
When limestone (calcium carbonate) is strongly heated, it breaks down into calcium oxide and carbon dioxide. If 88 grams of carbon dioxide is released when 200 grams of limestone is heated, how much calcium oxide is produced in this reaction? A. 56 grams B. 88 grams C. 112 grams D. 200 grams
Answer: The correct answer is Option C.
Explanation:
Law of conservation of mass states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form.
This also means that total mass on the reactant side must be equal to the total mass on the product side.
The chemical equation for the decomposition of limestone follows:
[tex]CaCO_3\rightarrow CaO+CO_2[/tex]
Let the mass of calcium oxide be 'x' grams
We are given:
Mass of carbon dioxide = 88 grams
Mass of calcium carbonate = 200 grams
Total mass on reactant side = 200 g
Total mass on product side = 88 + x
So, by applying law of conservation of mass, we get:
[tex]200=88+x\\\\x=112g[/tex]
The mass of calcium oxide that would be produced is 112 grams.
Hence, the correct answer is Option C.
3NO2− + 8H+ + Cr2O72− → 3NO3− +2Cr3+ + 4H2O
Classify each reactant as the reducing agent, oxidizing agent, or neither.
In the given chemical equation, NO2- is the reducing agent and Cr2O72- is the oxidizing agent.
Explanation:In this chemical equation, we can determine the reducing agent and oxidizing agent by examining the changes in oxidation numbers. The reducing agent is the reactant that causes another substance to be reduced, and the oxidizing agent is the reactant that causes another substance to be oxidized.
In this equation, NO2- is the reducing agent because it causes the chromium (Cr) in Cr2O72- to be reduced from a +6 oxidation state to a +3 oxidation state.
On the other hand, Cr2O72- is the oxidizing agent because it causes the nitrogen (N) in NO2- to be oxidized from a +4 oxidation state to a +5 oxidation state.
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NO₂⁻ is the reducing agent, H⁺ is neither, and Cr₂O₇²⁻ is the oxidizing agent in the given redox reaction.
Here's the classification of each reactant:
NO₂⁻ (Nitrite ion): Reducing Agent - This reactant loses electrons (is oxidized) and reduces another substance. Specifically, it changes from NO₂⁻ to NO₃⁻.
H⁺ (Hydrogen ion): Neither - This reactant merely provides the acidic environment necessary for the reaction but does not undergo a redox change itself.
Cr₂O₇²⁻ (Dichromate ion): Oxidizing Agent - This reactant gains electrons (is reduced) and oxidizes another substance. Specifically, it changes from Cr₂O₇²⁻ to Cr³⁺.
Thus, in the reaction, NO₂⁻ serves as the reducing agent, H⁺ does not alter its oxidation state and is neither, and Cr₂O₇²⁻ serves as the oxidizing agent.
Complete question:-
Here is a more complex redox reaction involving the dichromate ion in acidic solution: 3no2− + 8h+ + cr2o72− → 3no3− +2cr3+ + 4h2o classify each reactant as the reducing agent, oxidizing agent, or neither.
What pressure will be exerted by 0.650 mol of a gas at 30.0°C if it is contained in a 0.700L vessel? A) 2340kPa B) 2340atm C) 231kPa D) 231atm
Where in the water column would you expect to find the following conditions the highest pressure readings the densest waters the warmest temperature
Answer: The highest pressure is at the bottom
Explanation:
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A county creates an park to protect a forest.
Which formulas shows the relationship between momentum, mass and velocity
Answer:
P=m*s
Explanation:
The linear momentum of a particle of mass m or body m moving with a speed v is defined as the product of the mass times the speed:
P = m * v
Where, as previously stated, P = moment, m is the mass of the body, v is the speed.
The standard units for moment are [tex]kg*\frac{m}{s}[/tex], and moment is always a vector quantity. Its direction and direction coincide with those of the velocity vector.
Which of the following is not a organic compound, a -corn oil b -b r o m i n e c -m e t h a n e d- protein
According to the picture trout are a major source of food for bears. What would happen to the bear population if the trout population became significantly larger? A) The bear population would grow. B) The bear population would decrease. C) The bear population would stay the same. D) The change in the bear population can not be predicted.
Answer:
The an swer is A) on usa testprep
Explanation:
The bear population would grow. If there are more trout, there will be more food for the bears.
1. TNT, (C7H5N3O6) reacts explosively with oxygen gas (O2) to produce CO2 gas, water vapor, and N2 gas. If James weighs out 0.853 g of TNT, answer the following question: How many mg of O2 will react with the TNT?
Answer:
631.3 milligrams of oxygen gas will react with the TNT.
Explanation:
[tex]4C_7H_5N_3O_6+21O_2\rightarrow 28CO_2+10H_2O+6N_2[/tex]
Moles of TNT = [tex]\frac{0.853 g}{227 g/mol}=0.003758 mol[/tex]
According to reaction , 4 moles of tNT react with 21 moles of oxygen gas.
Then 0.003758 moles of TNT will react with:
[tex]\frac{21}{4}\times 0.003758 mol=0.01973 mol[/tex]
Mass of 0.01973 moles of oxygen ;
[tex]0.01973 mol\times 32 g/mol=0.6313 g=631.3 mg[/tex]
( 1 g = 1000 mg)
631.3 milligrams of oxygen gas will react with the TNT.
Because of hydrogen bonding,
Select one:
a. lakes freeze from the bottom up
b. ice is less dense than liquid water
c. ice sinks to the bottom of water
d. liquid water is less dense than ice
Because of hydrogen bond, ice is less denser than liquid water.
What is hydrogen bond?The force of attraction existing between hydrogen atom which is attached to highly electronegative atom in a covalent molecule and more electronegative atom of another covalent molecule is called hydrogen bond. Hydrogen bond is possible mostly in polar covalent molecules where partial charge separation is there.Hydrogen bond is possible mostly in polar covalent molecules where partial charge separation is there. They specifically occur between compounds that contain hydrogen and one or more of the electronegative atoms: oxygen, fluorine, or nitrogen. As this bond existed between partial charges, it is considered to be weak bond than ionic and covalent bonds.When water freezes, the water molecules form a crystalline structure by hydrogen bonds. An ice is less denser than liquid water, because the orientation of hydrogen bonds causes molecules to push farther apart, which lowers the density.
Hence, option b is the answer.
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What is the molarity of a solution that contains 2 moles of solute in 4 liters of solution?
A balloon with a volume of 0.851 L holds 0.783 mol He gas at a temperature of 150.0 K. The temperature then increases to 305 K, and the pressure is changed to 0.800 atm. The original pressure of the gas was ______ atm. The final volume of the balloon is _____ L.
Answer:
Original pressure = P1 = 11.3 atm
Final volume = V2 = 24.5 L
Explanation:
Given data:
Initial conditions:
Volume V1 = 0.851 L
Temperature T1 = 150.0 K
Moles of He n1 = 0.783
From ideal gas equation:
[tex]PV = nRT\\\\P = \frac{nRT}{V}[/tex]
Substituting the initial V, T and n using R = 0.0821 L.atm/mol-K we get:
[tex]P1 = \frac{0.783*0.0821*150.0}{0.851} = 11.33 atm[/tex]
Final conditions:
T2 = 305 K
P2 = 0.800 atm
Since the number of moles of He will remain constant we can write:
[tex]\frac{P1V1}{T1} = \frac{P2V2}{T2} \\\\V2 = \frac{P1*V1*T2}{T1*P2} = \frac{11.33*0.851*305}{150*0.800} =24.50 L[/tex]