Example A:
Julio was given the task to produce 59 grams of iron(III) oxide, . They had one tank of oxygen gas, and 54 grams of solid iron, . They knew that if he heated the iron in the presence of the oxygen gas, they could produce the iron(III) oxide. Since they had such little amount of iron, they decided to use as little of the iron as they could to produce the 59 grams of iron(III) oxide. Julio measured out 41 grams of iron and heated it with excess oxygen. Assume Julio's reaction went 100%. Julio was very happy that their reaction produced the 59 grams.
Example B:
Gretchen was given the task to produce 19 grams of aluminum fluoride, . They had a tank of fluorine gas, , and 7 grams of solid aluminum, . They knew that if they heated the aluminum in the presence of excess fluorine gas, they could produce the aluminum fluoride. Since Gretchen had such little amount of aluminum, they decided to use as little of aluminum as they could to produce the 19 grams of aluminum fluoride. Gretchen measured out 5 grams of aluminum and heated it with excess fluorine gas. Assume Gretchen's reaction went 100%. Gretchen was very happy their reaction produced the 19 grams.
Question #1: Which scientist did the experiment incorrectly? (1 pt)
Question #2: Explain what the scientist did incorrectly. Be sure to include the balanced equation for each scientist. Show the stoichiometry and explain in complete sentences why one experiment is wrong and the other is not. (4 pts)
Question #3: Explain specifically what the scientist should do to make the experiment correct (use numbers to support your answer). Also, include the stoichiometry to show how the scientist can make the experiment correct. (3 pts)
Answers
As Scientist B did the experiment incorrectly tht is Gretchen measured out 5 grams of aluminum and heated it with excess fluorine gas.
What is the stoichiometry in chemistry?Chemical Stoichiometry refers back to the quantitative look at of the reactants and merchandise concerned in a chemical reaction. The word “ stoichiometry” is derived from the Greek word “stoikhein” which means detail and “metron” which means measure.
As scientists used the insufficient amount of Al due to which weight of Al2O3 is not found ane caused the high error.It includes stoichiometry to show how the scientist can make the experiment correct by the production of 19 g of ALF3 which is 26.98 x 19 / 83.98 g of Al.so the mass is 610 g of Al that would be the correct amount.Read more about stoichiometry :
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Related Questions
ohesion between water molecules contributes to __________ which allows the molecules to stick together and resist outside forces.
Answers
Answer: I believe the answer is surface tension :)
What is percent composition by mass?
Answers
Percent composition indicates the relative amounts of each element in a compound. For each element, the mass percent formula is: % mass = (mass of element in 1 mole of the compound) / (molar mass of the compound) x 100% or. mass percent = (mass of solute / mass of solution) x 100%.
when a carrier has become saturated with a molecule and cannot carry any more, it has reached its
Answers
When a carrier has become saturated with a molecule and cannot carry anymore, it has reached its maximum capacity or saturation point. In many biological, chemical, and physical processes, carriers are essential for moving molecules or ions across a medium or across membranes.
Usually, proteins or other sorts of molecules that aid the transport of particular molecules serve as these carriers. When a carrier contains binding sites that can identify and attach to the molecules of interest, it is able to transport molecules.
The carrier and molecule often bond in a particular, reversible manner. The quantity of the molecules to be carried, their affinity for the carrier, and the number of accessible binding sites on the carrier are some of the variables that affect a carrier's saturation point.
Depending on the individual carrier and the technology it uses to function, these elements can change.
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A donut has a density of 0.75 g/cm cubed and a mass of 100.0g. What is the volume of the donut?
Answers
Answer:
133.333333333 cm^3
Explanation:
Volume = Mass/Density
Water and Air Masses
Air mass classification involves three letters. The first letter describes its moisture properties: continental air masses (c) and maritime air masses (m). The second letter is its source region: tropical (T), polar (P), arctic or Antarctic (A), monsoon (M), Equatorial (E), and superior (S) air. For instance, an air mass originating over the desert southwest of the United States in summer may be designated "cT"and an air mass originating over northern Siberia in winter may be indicated as "cA." The stability of an air mass may be shown using a third letter, either "k" (air mass colder than the surface below it) or "w" (air mass warmer than the surface below it).
PART A:In meteorology, an air mass is a volume of air defined by its temperature and water vapor content. Air masses cover many hundreds or thousands of miles, and adapt to the characteristics of the surface below them. Which statement INCORRECTLY describes air masses?
Responses
A Tropical air masses form near the equator and the air is warm.Tropical air masses form near the equator and the air is warm.
B Maritime air masses form over water and become dry as they lose water vapor to the water below it.Maritime air masses form over water and become dry as they lose water vapor to the water below it.
C Polar air masses form far from the equator where air becomes cool as it loses energy to the cold land or water.Polar air masses form far from the equator where air becomes cool as it loses energy to the cold land or water.
D Continental air masses form over land and are dry as it loses its moisture to the dry land below it.
PART B:When an air mass moves to a new region, it carries along its characteristic moisture and temperature. As the air moves over Earth’s surface, the characteristics of the surface begin to change the air mass. When a new air mass moves over an area, you can expect the weather to change. A front is a boundary between air masses. How would the weather change if a cold front moves into your area? All BUT ONE may apply.
Responses
A Weather changes rapidly.Weather changes rapidly.
B Temperatures drop.Temperatures drop.
C Rain is unlikely.Rain is unlikely.
D Wind becomes gusty.
Answers
In part A, the statement that incorrectly describes air masses is option C, Polar air masses form far from the equator where air becomes cool as it loses energy to the cold land or water.
Part B, the option that does not apply to the weather change if a cold front moves into an area at a front is option C, Rain is unlikely.
What happens when cold fronts move to a new region?When boundaries between air masses or cold fronts moves they cause changes to the weather, wind becomes gusty, heavy rain that sometimes come with hails and thunder as well as drop in temperature occurs.
Polar air masses are known to form only in areas with high latitudes and near the equator.
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help question 9 is due today also :)
Answers
Answer:
Car 3 with a net force of 12N
Explanation:
The formula is F=MA
Hope this helps friend
Which best explains why aluminum is a nonrenewable resource?
A)It cannot be quickly replaced.
B)It is expensive to process.
C)It conducts electricity.
D)It is useful to humans.
Answers
Answer:
A.) It cannot be quickly replaced.
Explanation:
Aluminum is extremely useful to humans but is semi-difficult to produce. Because of this, your answer will be numero uno. (Or A.)
CAN SOMEONE HELP ME PLEASE Evaluate, using the measurements and observations in Figure 8, whether ethanol or butanol is the
better fuel for heating the water.
Include calculations in your answer.
Answers
Answer:
ethanol
Explanation:
The better fuel for heating the water is ethanol as it burned with a clean blue flame.
What are the different colors of flame?The color of a flame can be red, orange, blue, yellow, or white. When extra chemicals are added to the fuel burning, it affects the frequencies of visible light radiation emitted.
The temperature of a flame is shown by its color and bright blue and has a temperature of about 1670 K. The temperature will drop as the color changes from yellow to orange. The cooler flame is often red and also forms smoke. The color of the flame also depends upon the supply of oxygen gas that is required to burn.
As mentioned in the observations of the ethanol and butanol. The ethanol burns the clean blue flame while butanol burns with a yellow sooty flame.
Therefore, ethanol is a better fuel for heating water than butanol.
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what is the temperature (degree fahrenheit) at the tip of a cigarette when a smoker inhales?
Answers
When a smoker inhales from a cigarette, the temperature at the tip can reach approximately 600-900 degrees Fahrenheit (315-480 degrees Celsius).
This high temperature is a result of the combustion process that occurs as the tobacco is burned. As the smoker draws in air, oxygen reacts with the burning tobacco, causing it to reach such extreme temperatures. The heat generated at the tip of the cigarette is a reflection of the intense chemical reactions taking place during smoking. It is important to note that these high temperatures contribute to the release of harmful substances, including carcinogens and toxic chemicals, which are then inhaled into the smoker's lungs.
The adverse health effects associated with smoking are well-documented, making it crucial for individuals to quit smoking or avoid tobacco use altogether to safeguard their well-being.
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What do you think or know about atoms?
Answers
Answer:
atoms I personally think and somewhat know that they are what mostly makes up everything and everyone but an interesting fact scientists say atoms can not touch
What is true about an atom when it is neutral? There may be more than one answer.
Group of answer choices
It has the same number of protons and electrons
It has no protons or electrons
It has no charge
It has more neutrons
Answers
Answer:
It has the same number of protons and electrons
Explanation:
Gina summarizes the ideas that led to the current atomic model.
1. Dalton developed the theory that all matter is made of atoms.
2. Thomson discovered that atoms contain electrons.
3. Rutherford discovered that atoms have a nucleus.
4. Schrödinger developed the electron cloud model.
5. Bohr developed the model in which electrons orbit the nucleus.
Which change should Gina apply to correct the summary?
Switch 1 and 5.
Switch 2 and 3.
Switch 4 and 5.
Switch 3 and 1.
Answers
Answer:
C. Switch 4 and 5
Explanation:
edge2021
The atomic model gives a detailed understanding of the atoms and the sub-atomic particles. The models were given in order by Dalton, Thomson, Rutherford, Bohr, and Schrödinger. Thus, option C is correct.
What is the atomic model?
The atomic model is the representation of the atom of the element along with the sub-atomic particles. The first model was given by Dalton, which stated that matter is composed of atoms.
Later Thomson discovered the presence of the electron present in the sea of the positive charges. In addition, Rutherford gave the presence of the positive nucleus in the middle of the atom.
Bohr's model gave the presence of the electron in the orbit of the atom around the nucleus. At last, the current atomic model was given by Schrödinger and is known as the electron cloud model.
Therefore, option C. Gina should Switch 4 (Schrödinger' model) with model 5 ( Bohr 's model).
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how many peaks would be expected in your aldol product molecule if a 13 c nmr spectrum were taken? (2 pt
Answers
The number of peaks that would be expected in your aldol product molecule if a 13 c nmr spectrum were taken is 8.
What is Dibenzyl acetone?Dibenzyl acetone is an organic compound with the chemical formula C₂0H₂O. It is also known as 4,4'-dibenzylideneacetone or DBA. It is a yellow to brown colored solid and is insoluble in water but soluble in organic solvents such as ethanol and acetone.
Dibenzyl acetone is widely used in organic synthesis as a building block for the preparation of various organic compounds. It is used as a starting material in the synthesis of chiral ligands, pharmaceuticals, and agrochemicals. It is also used as a flavor and fragrance ingredient in the production of perfumes and cosmetics.
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How many peaks would be expected in your aldol product molecule if a 13C NMR spectrum were taken?
aldol product is dibenzyl acetone
Match the appropriate benefit of dietary fiber intake to its associated disease. (Use each choice only once). Cardiovascular Disease A. Lowers Blood Cholesterol Hypertension B. Lowers Blood Pressure Type 2 Diabetes c. Decreases intestinal transit time and exposure to potential toxins Constipation D. Slows absorption of glucose Obesity E Slows rate of digestion, promotes satiety Colon Cancer F. Increases fecal bulk & promotes regularity
Answers
Cardiovascular diseases (CVDs) are the most common cause of death worldwide, claiming the lives of an estimated 17.9 million persons each year. CVDs are a group of heart and blood disorders.
How is blood made in the human body?The bone marrow produces stem cells, the building blocks that the body uses to make the different blood cells – red cells, white cells and platelets. The erythropoietin sends a message to the stem cells telling more of them to develop into red blood cells, rather than white cells or platelets.
What is in human blood?Whole blood is made up of red blood cells, white blood cells and platelets, all of which are suspended in a liquid called plasma. Whole blood and each of it's four components are all valuable tools in modern medicine.
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Answer please
.............................................................
Answers
This is not exactly a answer you can use but this is some information that you can use to find out the answer.
You can usually confirm the charge associate degree particle unremarkably has by the element's position on the periodic table: The alkali metals (the IA elements) lose one negatron to create a ion with a 1+ charge. The alkaline-earth metal metals (IIA elements) lose 2 electrons to create a 2+ ion.
Nonmetals type negative ions (anions). A range 7|chemical element|element|gas} atom should gain 3 electrons to possess an equivalent number of electrons as AN atom of the subsequent gas, neon. Thus, a gas atom can type AN ion with 3 additional electrons than protons and a charge of 3−.
DNA can be found on long strands of?
Answers
Answer:
DNA bases pair up with each other, A with T and C with G, to form units called base pairs. Each base is also attached to a sugar molecule and a phosphate molecule. Together, a base, sugar, and phosphate are called a nucleotide. Nucleotides are arranged in two long strands that form a spiral called a double helix.
The trait for rabbit fur follows an inheritance pattern of incomplete dominance. If a rabbit with short fur and a rabbit with long fur mate, what length fur will the offspring have?
Answers
Answer:
medium length fur
Explanation:
incomplete dominance is when the two traits kind of combine. u would have to make a punnet square, but in short, 100% of the offspring would have medium length fur
How many grams of NH3
form when 22.3 L
of H2(g)
(measured at STP) reacts with N2
to form NH3
according to this reaction?
N2(g)+3H2(g)→2NH3(g)
Answers
Answer:
11.2823 grams of NH3 are produced
Explanation:
No. of moles for H2 = 22.3/22.4 = 0.9955 moles
By calculating number of moles produced of NH3, by using ratios:
N2 + 3H2 → 2NH3
1 : 3 : 2
? : 0.9955: ?
part value = 0.9955/3 = 0.33183
No. of moles for NH3 = 2 * 0.33183 = 0.6637 moles
mass of produced NH3 (Molar mass = 17 g/mol) = 0.6637*17 = 11.2823 grams
Water and salt are compounds made of the combination of more than one type of atom. Which statement is false?
Answers
Answer:
This statement is correct
Explanation:
Water is made up of 2 hydrogen atoms and 1 oxygen atom while salt is made up of 1 atom of sodium and 1 atom of chloride
:)
A gas occupies 7.5 liters at a pressure of 25.0 mm Hg. What is the volume
when the pressure is increased to 75.0 mm Hg?
Answers
Answer:
2.5 litresExplanation:
The volume can be found by using the formula for Boyle's law which is
\(P_1V_1 = P_2V_2\)
where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
Since we're finding the final volume
\(V_2 = \frac{P_1V_1}{P_2} \\\)
We have
\(V_2 = \frac{7.5 \times 25}{75} = \frac{187.5}{75} \\ = 2.5\)
We have the final answer as
2.5 litresHope this helps you
A spherical balloon is inflating with helium at a rate of 48π ft3 min. How fast is the balloon's radius increasing at the instant the radius is 2 ft?
Answers
Answer:
Explanation:.
How do amphetamines work? (select all that apply)
A. bind to and block dopamine transporters; allow dopamine to remain in the synaptic cleft longer
B. cause the dopamine transporter to run in reverse; increase the dopamine concentration in the synaptic cleft
C. bind to and block serotonin transporters; allow serotonin to remain in the synaptic cleft longer
D. increase norepinephrine concentrations in the synaptic cleft
Answers
Amphetamines work by primarily binding to and blocking dopamine and norepinephrine transporters, thereby increasing the concentration of these neurotransmitters in the synaptic cleft. They can also have effects on serotonin transporters, but to a lesser extent. This prolonged presence of dopamine and norepinephrine in the synaptic cleft leads to increased neurotransmission and stimulation of the central nervous system.
Amphetamines, such as Adderall or methamphetamine, exert their effects by targeting neurotransmitter transporters. The most significant impact is on dopamine transporters (option A). Amphetamines bind to dopamine transporters and block their activity, preventing the reuptake of dopamine into presynaptic neurons. As a result, dopamine remains in the synaptic cleft for a longer time, increasing its concentration and enhancing dopamine signaling.
In addition to affecting dopamine, amphetamines also influence norepinephrine (noradrenaline) levels in the synaptic cleft (option D). They bind to norepinephrine transporters and inhibit their function, leading to increased norepinephrine concentration in the synapse.
While amphetamines can have some impact on serotonin transporters (option C), their effects on serotonin are relatively weaker compared to dopamine and norepinephrine. The precise mechanism of how amphetamines affect serotonin transporters is still not fully understood.
Overall, the primary mechanism of action of amphetamines involves increased dopamine and norepinephrine concentrations in the synaptic cleft, resulting in enhanced neurotransmission and stimulation of the central nervous system.
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PLEASE HELP ME
Which statement best explains the path light takes as it travels?
Light takes a curved path through matter and takes a straight path through space.
Light moves in a straight line except at surfaces between different transparent materials, where its path bends.
Light curves to spread out through openings and move around barriers.
P.S. If you put a link instead of just putting down the answer, I will report you -.-
Answers
Answer: B:Light moves in a straight line except at surfaces between different transparent materials, where its path bends.
Explanation:
Which of these would be called results
Counting fruit flies
Number of fruit flies
Seeing fruit flies on an apple
Wondering why fruit flies are on Apple
Answers
what is the function of the lungs
Answers
Answer:
the lungs are part of the respiratory system
Explanation:
Allows you to talk and to smell
Oxygen to the cells in your body
and helps you breathe
Answer:
Your lungs are part of the respiratory system, a group of organs and tissues that work together to help you breathe. The respiratory system's main job is to move fresh air into your body while removing waste gases.
Explanation:
Main functions of the lungs : -
Inhalation and Exhalation Are Pulmonary Ventilation - That’s Breathing External Respiration Exchanges Gases Between the Lungs and the Bloodstream.Internal Respiration Exchanges Gases Between the Bloodstream and Body TissuesAir Vibrating the Vocal Cords Creates SoundOlfaction, or Smelling, Is a Chemical SensationExplain the ""Phosphate trap"" in the estuary of Chesapeake Bay. Why was a local ban o phosphorus in detergents not particularly helpful in mitigating eutrophication in the estuary?
Answers
The “Phosphate trap” in the estuary of Chesapeake Bay is a phenomenon that causes a low oxygen condition in the bottom waters of the Bay. The local ban on phosphorus in detergents was not particularly helpful in mitigating eutrophication in the estuary of Chesapeake Bay.
The “Phosphate trap” is a process whereby, under certain conditions, phosphate in the sediments is released and becomes available for growth in the overlying water column.
This is due to the fact that detergents account for only a minor part of the phosphorus inputs into the Chesapeake Bay. The major sources of phosphorus are agricultural run-off, wastewater treatment plants, and air deposition. Therefore, reducing the phosphorus input from these major sources will be more effective in mitigating eutrophication in the Chesapeake Bay.
Overall, the local ban on phosphorus in detergents had a limited effect on mitigating eutrophication in the estuary of Chesapeake Bay.
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The largest element with electrons in two energy levels?
Answers
Answer:
alkaline earth metals
Explanation:
group 2A elements are the alkaline earth metals they have two electrons in the outermost energy level because their electron consideration ends in s2. you can add me and I'll help more please give me Brandy is I'm trying to move up I need two more to move up and I'll help you anytime I can
Evaluate the volume of the object as
determined by water displacement.
Measurement 1 (water only) = 9.15 mL
Measurement 2 (water + object) = 19.20 mL
Volume = [?] mL
Answers
Answer:
Explanation: 10.05 mL
To determine the volume of the object using water displacement, we subtract the initial volume (measurement 1) from the final volume (measurement 2).
Volume = Measurement 2 - Measurement 1
Volume = 19.20 mL - 9.15 mL
Volume = 10.05 mL
Therefore, the volume of the object, as determined by water displacement, is 10.05 mL.
Choose the mole ratio below that is INCORRECT based on the given balanced equation:
2 C2H5OH + 7 O2 --> 4 CO2 + 6 H2O
O 2 moles C2H5OH = 4 moles CO2
O 7 moles O2 = 2 moles C2H5OH
O 4 moles CO2 = 4 moles O2
O 6 moles H2O = 7 moles O2
Answers
Answer:
4 moles CO₂ = 4 moles O₂
Explanation:
The reaction equation is given as;
2C₂H₅OH + 7O₂ → 4CO₂ + 6H₂O
The incorrect mole ratio from the relationships shown is;
4 moles CO₂ = 4 moles O₂
Number of moles of CO₂ = 4
Number of moles of O₂ = 7
So, the right expression is;
4 moles CO₂ = 7 moles O₂
How fast is the object traveling from 4 to 6 seconds
Answers
The speed the object is traveling at, given the time from 4 to 6 seconds as shown in the graph is 2 m/s
How do i determine the speed of the object at the given time?From the question given above, the following data were obtained:
Initial distance = 2 mFinal distance = 6 mChange in distance = 6 - 2 = 4 mInitial time = 4 secondsFinal time = 6 secondsChange in time = 6 - 4 = 2 secondsSpeed of object =?The speed of the object at the given time can be obtain as follow:
Speed = change in distance / change in time
Inputting the various parameters, we have:
Speed of object = 4 / 2
Speed of object = 2 m/s
Thus, we can conclude that the speed of the object is at 2 m/s at the given time.
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