The answer is (d) cannot solve using 5% approximation rule.
The balanced equation for the reaction is:
C(g) + e(g) ⇌ 2W(g)
The equilibrium constant expression is given by:
Kc = [W]^2 / [C][e]
At equilibrium, let's assume that x moles of C react with x moles of e to produce 2x moles of W. Therefore, the equilibrium concentrations are:
[C] = (3.5 - x) mol/L
[e] = (x) mol/L
[W] = (2x) mol/L
Substituting these values :
Kc = [(2x)^2] / [(3.5 - x)(x)]
Simplifying this expression:
4x^2 + 2.34x - 8.19 = 0
Solving this quadratic equation :
x = (-2.34 ± sqrt(2.34^2 - 4(4)(-8.19))) / (2(4))
x = (-2.34 ± 3.64) / 8
We can ignore the negative root as it does not make physical sense. Therefore:
x = 0.4575 mol/L
Thus, the concentration of e at equilibrium is:
[e] = 0.4575 mol/L
Therefore, the answer is (d) cannot solve using 5% approximation rule.
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Determine the number of moles of c2o4 in a sample with 0.48 moles of mno4 at endpoint
There are 2.4 moles of C2O4^2- in the given sample
To determine the number of moles of C2O4 in the given sample, we need to use the balanced chemical equation of the reaction between MnO4 and C2O4. The equation is:
MnO4- + 5C2O4^2- + 8H+ → Mn2+ + 10CO2 + 4H2O
From the equation, we can see that 1 mole of MnO4- reacts with 5 moles of C2O4^2-. Therefore, if we have 0.48 moles of MnO4- at the endpoint, we can calculate the number of moles of C2O4^2- as follows:
0.48 moles MnO4- x (5 moles C2O4^2-/1 mole MnO4-) = 2.4 moles C2O4^2-
Therefore, there are 2.4 moles of C2O4^2- in the given sample.
It is important to note that moles are a unit of measurement used in chemistry to represent the amount of a substance, and it is equal to the mass of a substance in grams divided by its molar mass. In this case, we were able to determine the number of moles of C2O4^2- in the sample by using the stoichiometry of the balanced chemical equation.
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What is the volume of 0.78 mol of CO₂ gas at STP?
Answer: 17.49L
Explanation:
STP is 1atm and 273.15K
V=nRT/
V=(0.78)(0.0821)(273.15)/1
V= 17.49L
13. Lab Analysis: You forgot to label your chemicals and do not know whether your unknown solution is strontium nitrate or magnesium nitrate. You use the solutions potassium carbonate and potassium sulfate in order to determine your mistake. unknown + potassium carbonate & unknown + potassium sulfate . What do you observe when the unknown solution is mixed with potassium sulfate? (Can you see the shape underneath?)
if the unknown solution is mixed with potassium carbonate, the reaction will proceed differently depending on whether the unknown solution is strontium nitrate or magnesium nitrate.
Mixing the unknown solution with potassium sulfate will not provide any useful information to identify whether the unknown solution is strontium nitrate or magnesium nitrate. This is because neither strontium nor magnesium sulfate has distinctive properties that allow them to be easily distinguished from one another.
However, When mixed with strontium nitrate, potassium carbonate will form a white precipitate of strontium carbonate, while no reaction will occur when mixed with magnesium nitrate. Therefore, the presence of a white precipitate after mixing with potassium carbonate indicates that the unknown solution is strontium nitrate.
In summary, to identify whether the unknown solution is strontium nitrate or magnesium nitrate, the solution should be mixed with potassium carbonate. If a white precipitate forms, the solution is strontium nitrate. If no reaction occurs, the solution is magnesium nitrate. Mixing the unknown solution with potassium sulfate will not provide any useful information.
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What is mean by region of postive slope on the heating curve of water
When we talk about a heating curve of water, we are referring to a graph that shows the temperature of water as it is heated.
The x-axis of the graph represents the amount of heat energy being added to the water, while the y-axis represents the temperature of the water.
The region of positive slope on the heating curve of water refers to the portion of the graph where the temperature of the water is increasing as more heat energy is added. This region starts at the melting point of ice (0°C) and extends all the way to the boiling point of water (100°C) at standard atmospheric pressure.
During this region, the heat energy being added to the water is being used to break the intermolecular bonds between the water molecules and increase their kinetic energy, resulting in an increase in temperature. As the temperature increases, the water transitions from a solid (ice) to a liquid, and finally to a gas (steam).
It is important to note that the slope of the heating curve during the region of positive slope is positive, which means that the temperature is increasing at a steady rate. This region is significant because it represents the phase changes of water, which have important implications for a variety of fields, including chemistry, physics, and engineering.
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A sample of 0. 0400 mol potassium hydroxide, KOH was dissolved in water to yield 20. 0 mL of solution. What is the molarity of the solution?
0. 4M
250M
2. 0M
2. 00x 10-3M
The molarity of the potassium hydroxide solution is 2.0 M.
We know that, Molarity (M) = moles of solute (mol) / volume of solution (L)
We have 0.0400 mol of KOH dissolved in 20.0 mL of water.
Volume of the solution= 20.0 mL = 20.0 / 1000 = 0.0200 L
Therefore, molarity = (0.0400 mol) / (0.0200 L) = 2.0 M
So, the molarity of the potassium hydroxide solution is 2.0 M.
Thus, option 3 is the correct answer.
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Differentiate between tagatose and leloir pathways
Tagatose and Leloir pathways are two different metabolic pathways involved in the breakdown and utilization of dietary sugars, such as galactose.
The Tagatose pathway is a bacterial pathway that allows for the utilization of galactose, a monosaccharide similar to glucose, as an energy source.
In this pathway, galactose is converted into tagatose, another monosaccharide, by the enzyme galactose isomerase.
The tagatose is then broken down into dihydroxyacetone phosphate (DHAP) and glyceraldehyde-3-phosphate (G3P) through a series of reactions, which can enter the glycolysis pathway for further energy production.
The Leloir pathway, on the other hand, is a pathway found in animals and some microorganisms that also converts galactose into glucose-6-phosphate (G6P), a molecule that can enter the glycolysis pathway.
In the Leloir pathway, galactose is converted into galactose-1-phosphate by the enzyme galactokinase, and then into UDP-galactose by the enzyme galactose-1-phosphate uridylyltransferase. UDP-galactose is then converted into UDP-glucose by the enzyme UDP-galactose 4-epimerase.
Finally, UDP-glucose is converted into G6P by the enzyme phosphoglucomutase.
In summary, while both pathways involve the conversion of galactose into glucose derivatives, the Tagatose pathway involves the conversion of galactose into tagatose and then into DHAP and G3P, while the Leloir pathway involves the conversion of galactose into G6P through a series of intermediate steps.
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A 22 -ml sample of 12m h2so4 is diluted to a volume of 1200.0 ml. what is the molarity of the diluted solution?
The molarity of the solution diluted to the 1200.0 ml volume is found to be 0.220M.
The number of moles of H₂SO₄ in the original 22 mL solution can be calculated using the following formula,
moles of H₂SO₄ = Molarity × Volume (in liters)
22 mL = 22/1000 L
= 0.022 L
Substituting the given values, we get,
moles of H₂SO₄ = 12 M × 0.022 L
= 0.264 moles
The number of moles of H₂SO₄ will not change once the solution is diluted to a volume of 1200.0 mL since no H₂SO₄ is added or taken away. Consequently, the following formula can be used to determine the molarity of the diluted solution:
Molarity = moles of H₂SO₄ / Volume (in liters)
Again, we need to convert the volume to liters,
1200.0 mL = 1200.0/1000 L
= 1.200 L
Substituting the values, we get,
Molarity = 0.264 moles / 1.200 L
= 0.220 M
Therefore, the molarity of the diluted solution is 0.220 M.
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Naturally occurring potassium consists of potassium-39 and potassium-41. calculate the percentage of each isotope present if theaverage is 39.1.
When the average is 39.1, naturally occurring potassium consists of 50% potassium-39 and 50% potassium-41.
An isotope is a variant of an element that has the same number of protons but a different number of neutrons in its nucleus. Potassium has two naturally occurring isotopes: potassium-39 and potassium-41. To calculate the percentage of each isotope present when the average is 39.1, we can use the following formula:
% of potassium-39 = (39.1 - 41) / (39 - 41) x 100%
% of potassium-41 = 100% - % of potassium-39
Using this formula, we can first calculate the percentage of potassium-39:
% of potassium-39 = (39.1 - 41) / (39 - 41) x 100%
% of potassium-39 = -1 / (-2) x 100%
% of potassium-39 = 50%
This means that potassium-39 makes up 50% of the naturally occurring potassium. To calculate the percentage of potassium-41, we simply subtract the percentage of potassium-39 from 100%:
% of potassium-41 = 100% - 50%
% of potassium-41 = 50%
Therefore, potassium-41 also makes up 50% of the naturally occurring potassium. In summary, when the average is 39.1, naturally occurring potassium consists of 50% potassium-39 and 50% potassium-41.
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Review this reaction:
H2SO4+NaOH->?.
What are the products?
the process in which an atom or ion experiences a decrease in its oxidation state is _____________.
Answer:
Reduction
Explanation:
when an atom or ion decreases in oxidation state
The process in which an atom or ion experiences a decrease in its oxidation state is called reduction.
Reduction is the opposite of oxidation, which is the process in which an atom or ion experiences an increase in its oxidation state. In a redox (reduction-oxidation) reaction, one species undergoes reduction while the other undergoes oxidation.
In the process of reduction, the species gains electrons, resulting in a decrease in its oxidation state. The reducing agent is the species that donates electrons, while the oxidizing agent is the species that accepts electrons.
Reduction reactions are important in many chemical and biological processes, including metabolism, photosynthesis, and corrosion. The study of redox reactions is important in understanding the behavior of chemicals in natural and industrial processes.
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For #12 - #14, write the balanced chemical equation and identify each by type of reaction.
12. copper + chlorine → copper(II) chloride
13. calcium chlorate → calcium chloride + oxygen
14. lithium + water → lithium hydroxide + hydrogen
Answer:
12. Balanced chemical equation: Cu + Cl2 → CuCl2
Type of reaction: Combination or synthesis reaction
13. Balanced chemical equation: 2Ca(ClO3)2 → 2CaCl2 + 3O2
Type of reaction: Decomposition reaction
14. Balanced chemical equation: 2Li + 2H2O → 2LiOH + H2
Type of reaction: Single displacement or substitution reaction
Explanation:
Hope it helps^^
Three ions that contain the element phosphorus are phosphate (PO43–), hydrogen phosphate (HPO42–), and dihydrogen phosphate (H2PO4–). Compare the formulas of these three ions. Also notice any other instances in which hydrogen is added to a polyatomic ion from the table. Then complete the description of the pattern you see. Select the correct answer from each drop-down menu
The three ions containing phosphorus are phosphate (PO₄³⁻), hydrogen phosphate (HPO₄²⁻), and dihydrogen phosphate (H₂PO₄⁻).
The pattern observed is that adding hydrogen atoms successively reduces the negative charge of the ion by one unit.
1. Observe the formulas of the three ions: PO₄³⁻, HPO₄²⁻, and H₂PO₄⁻.
2. Notice that hydrogen atoms are added successively: 0, 1, and 2.
3. Observe the charges of the ions: -3, -2, and -1.
4. Recognize the pattern: adding hydrogen atoms reduces the negative charge by one unit.
In other instances where hydrogen is added to polyatomic ions, a similar pattern occurs. The negative charge decreases as more hydrogen atoms are added. This pattern is consistent across various polyatomic ions containing hydrogen.
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Which of the following is NOT a function of the skeletal system?
moving blood through your body
protecting soft body parts
supporting your body
providing a place for muscles to attach
Answer:
Moving blood through your body
Explanation:
Thats the job of vascular system IE heart arteries and veins.
How many joules are required to raise the temperature of 100.0 grams of water from -269 degrees celsius to 1500 degrees celsius
About 739,982.4 Joules energy is required to raise the temperature of 100.0 grams of water from -269 degrees Celsius to 1500 degrees Celsius.
The formula for the change in heat is,
Q = mcΔT, the amount of energy required is Q, m is the mass of water, specific heat capacity of water is c, the change in temperature is ΔT,
ΔT = 1500°C - (-269°C)
ΔT = 1769°C
Next, we can look up the specific heat capacity of water, which is 4.184 J/g°C. Then, we can substitute the values into the formula,
Q = 100.0 g * 4.184 J/g°C * 1769°C
Q = 739,982.4 J
Therefore, it would require 739,982.4 Joules of energy to raise the temperature of 100.0 grams of water from -269 degrees Celsius to 1500 degrees Celsius.
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NEED HELP FAST!!!! Please answer both questions
There is a 0.37 M molarity.
1.71 m molality is present.
Molarity: What is it?The quantity of a solute in a solution is measured in terms of molarity, a unit of concentration. It is described as the quantity of solutes that dissolve in one liter of solution, or mol/L. Molarity, in other words, reveals how many moles of solute there are in a liter of solution.
To determine molarity, use the following formula:
Molarity (M) is calculated as moles of solute divided by the liters of solution.
100g/180 g/mol * 1/1.5 L is the molarity.
= 0.37 M,
Molality = 200g/58.5g/mol * 1/2 Kg
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use a sheet of paper to answer the following question. take a picture of your answers and attach to this assignment. treatment of pentanedioic (glutaric) anhydride with ammonia at elevated temperature leads to a compound of molecular formula c5h7no2. what is the structure of this product? [hint: you need to think about the reactivity not only of acid anhydrides but also of amides and carboxylic acids]
The structure of product is shown.
When pentanedioic (glutaric) anhydride reacts with ammonia at high temperature, it undergoes an amide formation reaction to produce a compound with the molecular formula C₅H₇NO₂. The amide formation reaction involves the nucleophilic attack of the ammonia molecule on one of the carbonyl carbon atoms of the anhydride, leading to the formation of an intermediate product called an amide.
This amide then undergoes further reactions to form the final product with the given molecular formula. The presence of both carboxylic acid and amide functional groups in the molecule indicates that it contains both the original anhydride and the product of its reaction with ammonia.
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How many ions would form from the dissociation of ammonium dichromate (nh4)2cr2o7?
One formula unit of ammonium dichromate, three ions would form upon dissociation in water.
When ammonium dichromate (NH₄)₂Cr₂O₇ dissociates in water, it breaks down into two ammonium ions (NH₄⁺) and one dichromate ion (Cr₂O₇²⁻). The dissociation is represented by the following chemical equation:
(NH₄)2Cr₂O₇ → 2NH₄⁺ + Cr₂O₇²⁻
Therefore, a total of three ions would be formed from the dissociation of ammonium dichromate in water. The two ammonium ions would have a positive charge, while the dichromate ion would have a negative charge.
These ions can interact with other ions in the solution and participate in various chemical reactions. The dissociation of ammonium dichromate is important in various industrial processes, as well as in chemical education for demonstrating chemical reactions and properties of ions.
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2. write out the balanced chemical equation for the reaction of 2 moles of naoh with 1 mole of h3po4
2NaOH + H₃PO₄ → Na₂HPO₄ + 2H2O is the balanced chemical equation for the reaction between 2 moles of NaOH and 1 mole of H3PO4.
It is clear from the balanced chemical equation that the reaction between 2 moles of NaOH and 1 mole of H₃PO₄ is an acid-base reaction, commonly referred to as a neutralization reaction.
In this reaction, phosphoric acid (H₃PO₄) acts as the acid and sodium hydroxide (NaOH) as the base. Na₂HPO₄ and H2O are created when the base (NaOH) and acid (H₃PO₄) react. Since all the reactants are completely consumed in the reaction and no excess of either reactant is left over, the stoichiometric balance of the number of moles of the acid and base is demonstrated by the balanced chemical equation.
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I NEED HELP ON THIS ASAP!!!
Answer: I believe it's A
Source: Trust me bro
How many atoms are in 8.02 grams of sulfur?
Answer:
1.503 x 10^23
Explanation:
your question was how many atoms, so you have to multiply that number which is how many molecules by 8 atoms per molecule of sulphur. So you get 1.503 x 10^23 atoms in 8 grams of sulfur.
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Silo measure d 640 grams of sulphur which occupies 540ml of container at 47 degree celsius.find the pressure of the gas.
The pressure of the gas is 76.8 atm.
The pressure of the gas can be calculated using the ideal gas law formula:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.
First, we need to calculate the number of moles of sulfur:
molar mass of sulfur = 32 g/mol
number of moles = mass/molar mass
= 640 g/32 g/mol
= 20 mol
Next, we need to convert the volume from milliliters to liters and the temperature from Celsius to Kelvin:
V = 540 ml = 0.54 L
T = 47°C + 273.15 = 320.15 K
Finally, we can plug in the values and solve for pressure
P = nRT/V
= 20 mol x 0.08206 L atm mol⁻¹ K⁻¹ x 320.15 K / 0.54 L
= 76.8 atm
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A 54.2 g sample of Magnesium has an initial temperature of 55°C and a final temperature of 78°C, and the specific heat of Magnesium is 1.023 J/g°C. If the sample absorbs 1300 J of heat energy, what is the change in temperature?
Change in temperature of the Magnesium sample is calculated as 23.7°C.
What is meant by heat energy?Heat energy is a form of energy that is transferred between objects or systems due to temperature difference. It flows from hotter to cooler objects, and its amount is measured in joules.
As we know; Q = m c ΔT
Q is the amount of heat absorbed, m is mass of the object, c is specific heat, and ΔT is change in temperature.
ΔT = Q / (m * c)
ΔT = 1300 J / (54.2 * 1.023 )
ΔT = 23.7°C
Therefore, the change in temperature of the Magnesium sample is 23.7°C.
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A solution of lithium carbonate reacts with a solution of potassium iodide to produce solid potassium carbonate and aqueous lithium iodide. You measure 3. 9 moles of potassium carbonate produced by the reaction. How much lithium iodide was produced?
The quantity of lithium iodide produced in the reaction was determined to be 7.8 moles.
The balanced chemical equation for the reaction between lithium carbonate (Li₂CO₃) and potassium iodide (KI) is:
2 Li₂CO₃ + 2 KI → 2 K₂CO₃ + 4 LiI
From the balanced equation, we can see that for every 2 moles of Li₂CO₃ reacted, 4 moles of LiI are produced.
Therefore, if we have 3.9 moles of K₂CO₃, we can calculate the moles of LiI produced as:
3.9 moles K₂CO₃ × (4 moles LiI / 2 moles Li₂CO₃) = 7.8 moles LiI
Therefore, 7.8 moles of lithium iodide were produced in the reaction.
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What mass of solid CH2Cl2 can be melted by applying 7. 80 kJ of energy at the melting point?
grams (3 sig figs)
The mass of CH2Cl2 that can be melted by applying 7.80 kJ of energy at the melting point can be calculated using the equation of q = m * c * ΔT, where q is the energy applied, m is the mass, c is the heat capacity, and ΔT is the difference between the final and initial temperatures. In this case, the mass can be calculated as m = q / (c * ΔT). Plugging in the given values yields a mass of 0.126 g, rounded to three significant figures.
Therefore, 7.80 kJ of energy can melt 0.126 g of solid CH2Cl2 at the melting point. The equation used for this calculation assumes that the heat capacity and melting point of CH2Cl2 remain constant throughout the process, and thus the calculated value is only an estimate.
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which nutrients are most responsible for eutrophication?
a. carbon and oxygen
b. carbon and phosphorus
c. nitrogen and oxygen
d. nitrogen and phosphorus
Answer:
C. Nitrogen and Phosphorous.
Explanation:
Use the drop-down menus to rank the boiling points of the following hydrocarbons. Use a "1" to indicate the compound with the lowest boiling point.
The boiling points of the hydrocarbons can be ranked as follows;
1. 4
2. 2
3. 3
4. 1
What controls the boiling points of the hydrocarbons?The size of the molecules and the nature of the intermolecular interactions between the molecules essentially determine the boiling points of hydrocarbons.
Because they have more electrons and a larger surface area available for intermolecular interactions like Van der Waals forces, larger hydrocarbon molecules typically have higher boiling points.
Additionally, polar hydrocarbons and those that can form hydrogen bonds have higher boiling points than non-polar hydrocarbons because of stronger intermolecular forces.
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Is the hypothesis that a particular trait evolved by natural selection falsifiable? That is, if you thought a particular trait didn't evolve by natural selection, could you test that our for yourself, given sufficient time, resources, an an organism that isn't too difficult to study?
Group of answer choices
Yes, the hypothesis that a particular trait evolves by natural selection is falsifiable
No, the hypothesis that a particular trait evolved by natural selection is intrinsic to a modern understanding of biology and the *theory* of evolution by Natural Selection. Therefore in order to disprove that a particular trait evolved by natural selection, you would need to accumulate so much evidence that you could overturn that entire theory,.
It's impossible to tell - unlike other scientific theories, the idea that a trait evolved by natural selection is more of a philosophical position - you can't really test it
Yes, but to do that you would be required to show that the trait isn't heritable, and that it doesn't provide a fitness advantage, and that it doesn't vary in your population.
The hypothesis that a particular trait evolved by natural selection is indeed falsifiable. In fact, this is one of the foundational principles of the scientific method.
researchers must also consider alternative hypotheses and rule out alternative explanations before concluding that a trait evolved by natural selection.
The hypothesis that a particular trait evolved by natural selection is indeed falsifiable. In fact, this is one of the foundational principles of the scientific method.
To test whether a particular trait evolved by natural selection, researchers can design experiments or observational studies to investigate the trait's function and potential selective pressures. For example, they could manipulate the trait in question to see how it affects the organism's fitness, or compare the trait's frequency or variation across populations with different environmental conditions.
However, it's important to note that demonstrating that a trait evolved by natural selection does not necessarily mean that it is the only possible explanation for the trait's existence. Other evolutionary mechanisms such as genetic drift, gene flow, or mutation could also play a role in shaping the trait. Therefore, researchers must also consider alternative hypotheses and rule out alternative explanations before concluding that a trait evolved by natural selection.
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Which words would be under the subheading "Ingredients"?
(Heading) Old Hunting Recipe for Rhinoceros Stew
(Subheading) Ingredients:
hair
broth
pepper
rhinoceros
hare
salt
water
onions
The words listed under the subheading "Ingredients" for the recipe "Old Hunting Recipe for Rhinoceros Stew" would be: Rhinoceros, Hare, Onions, Water, Broth, Salt, Pepper, and Hair.
What word would be listed?Under the subheading "Ingredients" for the recipe "Old Hunting Recipe for Rhinoceros Stew," the following words would be listed:
RhinocerosHareOnionsWaterBrothSaltPepperHair (Note: this is an unusual ingredient and may be questioned as to its necessity in the recipe)
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Choosy moms choose JIF! Your mom is making PB & J sandwiches for you and her. When she looks in the cupboard, she realizes she has 3 slices of bread, 1 jar of peanut butter, and 1/2 jar of jelly. What is the limiting reactant?
In this scenario, the limiting reactant is the ingredient that will run out first and limit the number of sandwiches that can be made.
Assuming that each sandwich requires two slices of bread, one serving of peanut butter, and one serving of jelly, we can see that we have enough bread and jelly to make a maximum of 1.5 sandwiches. However, since we only have one serving of peanut butter, we can only make one sandwich.
Therefore, the peanut butter is the limiting reactant. It is important to identify the limiting reactant in chemical reactions to determine the maximum amount of product that can be formed and to avoid wasting resources.
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What does the NaCl + Br₂ represent in the reaction?
NaBr + Cl₂ → NaCl + Br₂
A. Reactants
B. Products
C. Yields Br
D. States of Matter
