Describe the relationship between clarie and marsha change in the story. use evidence from the text to support your answer.
Answers
The relationship between Claire and Marsha changes from being close and supportive to distant and strained.
In the story, the relationship between Claire and Marsha begins as a positive and friendly one, but it changes over time. Initially, they share a close bond and are always seen together. For instance, in the text, it is mentioned that they were inseparable and "spent all their time together" (para. 1).
However, as the story progresses, their relationship becomes strained due to a lack of communication and misunderstandings. For example, when Marsha begins dating a new boy, Claire feels left out and becomes jealous. This leads to an argument between the two, and they begin to drift apart. As the author notes, "They stopped speaking. They passed each other in the hallways like strangers" (para. 4).
Overall, the relationship between Claire and Marsha changes from being close and supportive to distant and strained. This change is due to the lack of communication and understanding between the two, which causes a breakdown in their friendship.
Learn more about Claire and Marsha at: https://brainly.com/question/29064751
#SPJ11
Related Questions
The Liquified Petroleum Gas (LPG) has the composition of 60% Propane (C 3
H 8
) and 40% Butane (C 4
H 10
) by volume: (a) Find the wet volumetric and gravimetric analysis of the products of combustion when the equivalence ratio (Φ)=1.0. (b) What is the stoichiometric air to fuel ratio for the LPG.
Answers
The balanced combustion reaction for propane can be represented as:
C₃H₈ + (5/2)O₂ → 3CO₂ + 4H₂O
And the balanced combustion reaction for butane can be represented as:
C₄H₁₀ + (6.5)O₂ → 4CO₂ + 5H₂O
Since LPG is composed of 60% propane and 40% butane by volume, we can calculate the wet volumetric and gravimetric analysis based on these proportions.
Wet volumetric analysis:
For the wet volumetric analysis, we consider the volume of the products of combustion relative to the volume of the LPG consumed.
Propane (C₃H₈):
The stoichiometric coefficient of propane in the combustion reaction is 3. Therefore, for every mole of propane burned, we will have 3 moles of CO₂ and 4 moles of H₂O formed.
Butane (C₄H₁₀):
The stoichiometric coefficient of butane in the combustion reaction is 4. Therefore, for every mole of butane burned, we will have 4 moles of CO₂ and 5 moles of H₂O formed.
Considering the initial composition of 60% propane and 40% butane by volume, we can calculate the volumetric composition of the products of combustion:
Volumetric composition of CO₂:
(0.6 * 3) + (0.4 * 4) = 3.6
Volumetric composition of H₂O:
(0.6 * 4) + (0.4 * 5) = 4.6
Therefore, the wet volumetric analysis of the products of combustion is 3.6 parts CO₂ to 4.6 parts H₂O.
Wet gravimetric analysis:
For the wet gravimetric analysis, we consider the mass of the products of combustion relative to the mass of the LPG consumed.
Using the molar masses of the compounds involved in the combustion reaction:
Molar mass of CO₂ = 44 g/mol
Molar mass of H₂O = 18 g/mol
Gravimetric composition of CO₂:
(0.6 * 3 * 44 g/mol) + (0.4 * 4 * 44 g/mol) = 158.4 g
Gravimetric composition of H₂O:
(0.6 * 4 * 18 g/mol) + (0.4 * 5 * 18 g/mol) = 74.4 g
Therefore, the wet gravimetric analysis of the products of combustion is 158.4 grams CO₂ to 74.4 grams H₂O.
(b) The stoichiometric air to fuel ratio for LPG can be determined based on the balanced combustion equations for propane and butane.
For propane (C₃H₈):
C₃H₈ + (5/2)O₂ → 3CO₂ + 4H₂O
The stoichiometric coefficient for propane is 1, which means we need 5/2 moles of O₂ for every mole of propane.
For butane (C₄H₁₀):
C₄H₁₀ + (6.5)O₂ → 4CO₂ + 5H₂O
The number of molecules in 1 mole of NaCl?
Answers
Answer:
6.022 x 10^23 molecules
Explanation:
write 3-4 sentences to describe the bonding involved in ionic solids. explain the movement of electrons and the strength of the bond. jiskha, question cove
Answers
Ionic solids are composed of positively and negatively charged ions held together by electrostatic forces of attraction.
In these solids, electrons are transferred from one atom to another, resulting in the formation of ions with opposite charges. The movement of electrons is restricted, as they are localized within their respective ions. The strength of the bond in ionic solids is primarily determined by the magnitude of the charges on the ions and the distance between them. The greater the charge and the smaller the distance, the stronger the electrostatic attraction and the more stable the ionic solid.
You can learn more about Ionic solids at
https://brainly.com/question/2773282
#SPJ11
pls help me on this I have 5 minutes left to submit
Answers
#1
Heterogenous mixture mean unsimilar substances .
Chicken noodle soyp.salt waterpropane.#2
An element is a substance made of only one type of atoms
Example-Al,SIf there are 2 grams of product produced by the chemical reaction, how many grams of reactant were consumed?.
Answers
The Law of Conservation of Mass given by Antoine Lavoisier states that mass is neither created nor destroyed. So, if 2 gm of product are produced, then mass of reactants consumed is also 2 grams.
What is law of conservation of mass ?
According to the rule of conservation of mass, mass is neither generated nor destroyed during a chemical process. For instance, when coal is burned, the carbon atom in it transforms into carbon dioxide. The carbon atom transforms from a solid to a gas, yet its mass remains constant.
Law of Conservation of Mass: Its Importance in Chemistry. Understanding and producing different chemical reactions depend heavily on this law. Researchers might anticipate how much the result would be if they knew the identities and quantities of the reactants for each reaction.
To know about law of conservation of mass from the link
https://brainly.com/question/15289631
#SPJ4
The chemical reaction: 8 Fe + Sa - 8 FeS is a:
T synthesis reaction
O single displacement reaction
combustion reaction
O decomposition reaction
Answers
The chemical reaction 8 Fe + Sa - 8 FeS is a single displacement reaction. In this type of reaction, an element or ion replaces another element in a compound.
In this case, the Fe (iron) is replacing the Sa (sulfur) in the compound, resulting in the formation of FeS (iron sulfide). The other options listed, synthesis reaction, combustion reaction, and decomposition reaction, do not apply to this particular chemical reaction. A synthesis reaction involves the combination of two or more elements or compounds to form a more complex compound.
A combustion reaction involves the reaction of a fuel with oxygen to produce carbon dioxide and water. A decomposition reaction involves the breakdown of a compound into simpler components. Therefore, the correct answer is single displacement reaction.
Since the reactants are combining to form a single product, this reaction is considered a synthesis reaction.
To know more about displacement reaction visit:-
https://brainly.com/question/29307794
#SPJ11
A student carefully placed 18.1 g of sodium in a reactor supplied with an excess quantity of chlorine gas. When the reaction was complete, the student obtained 39.6 g of sodium chloride. How many grams of chlorine gas reacted?
Answers
Answer:
The mass of chlorine gas that reacted ≅ 24.03 g
Explanation:
From the given information:
The number of moles of NaCl formed = mass of NaCl/molar mass
mass of NaCl = 39.6 g
molar mass = (23 + 35.5) g/mol = 58.5 g/mol
∴
The number of moles of NaCl formed = 39.6 g / 58.5 g/mol
The number of moles of NaCl formed = 0.6769 g/mol
Thus, the mass of chlorine gad that reacted = 0.6769 × 35.5
The mass of chlorine gas that reacted = 24.02995 g
The mass of chlorine gas that reacted ≅ 24.03 g
Understanding Claims vs. Scientific Claims
Which statements about claims are true? Check all that apply.
A.Sometimes people claim things that are not true
B.If a scientist claims that something is true, is it true?
C.scientific claim is supported by evidence that demonstrates it is true
D.Scientific claims are the result of controlled experiments.
E.Scientific claims should never be questioned.
Answers
Answer:
IT IS A C D I GOT IT WRONG FROM THE ANSWER ON TOP OF ME
Explanation:
burning sugar is a chemical change give reason?
Answers
Burning a sugar cube is a chemical change. Fire activates a chemical reaction between sugar and oxygen. The oxygen in the air reacts with the sugar and the chemical bonds are broken. Burning sugar leads to reaction of sugar with oxygen in air and leads to formation of carbon dioxide and water. The change is irreversible and is thus a chemical change
The volume of gas changes from 5L to 3L, what will be the new pressure? What law did you use and why? HELP PLSSS <3!
Answers
Answer:
The new pressure will be (P/3) units.
Explanation:
The law that describes the relationship between the pressure and volume of a gas is Boyle’s law. It states that the pressure and volume of a gas have an inverse relationship when the temperature is held constant. Therefore, when the volume of a gas decreases, the pressure increases and vice versa .
Using Boyle’s law, we can calculate the new pressure of the gas. If the initial volume of the gas is 5L and it changes to 3L, then we can say that the volume has decreased by 5/3 times. Therefore, using Boyle’s law, we can say that the pressure has increased by 3/5 times.
The formula for Boyle’s law is P1V1 = P2V2 where P1 and V1 are the initial pressure and volume respectively and P2 and V2 are the final pressure and volume respectively. We can rearrange this formula to find P2 which is what we are looking for.
P2 = (P1V1)/V2
Substituting P1 = initial pressure = P (say), V1 = initial volume = 5L, V2 = final volume = 3L
P2 = (PV)/3
Therefore, the new pressure will be (P/3) units.what is the molarity of calcium hydroxide if 15 ml of the solution is neutralized by 15.8 ml of. 90M phosphoric acid
Answers
The molarity of calcium hydroxide if 15 ml of the solution is neutralized by 15.8 ml of. 90M phosphoric acid is 0.22 M.
How to calculate molarity?The balanced chemical equation for the reaction between calcium hydroxide and phosphoric acid is:
Ca(OH)₂ + H₃PO₄ → Ca₃(PO₄)₂ + 2H₂O
The molar ratio of calcium hydroxide to phosphoric acid is 1:3.
The volume of the phosphoric acid solution is 15.8 mL and the molarity of the phosphoric acid solution is 0.90 M.
Use the following equation to calculate the moles of phosphoric acid:
moles of H₃PO₄ = molarity × volume
moles of H₃PO₄ = 0.90 M × 15.8 mL
moles of H₃PO₄ = 14.22 mmol
Since the molar ratio of calcium hydroxide to phosphoric acid is 1:3, the moles of calcium hydroxide is 1/3 of the moles of phosphoric acid.
moles of Ca(OH)₂ = moles of H₃PO₄ / 3
moles of Ca(OH)₂ = 14.22 mmol / 3
moles of Ca(OH)₂ = 4.74 mmol
Use the following equation to calculate the molarity of calcium hydroxide:
molarity of Ca(OH)₂ = moles of Ca(OH)₂ / volume
molarity of Ca(OH)₂ = 4.74 mmol / 15 mL
molarity of Ca(OH)₂ = 0.28 M
Therefore, the molarity of calcium hydroxide is 0.22 M.
Find out more on molarity here: https://brainly.com/question/30404105
#SPJ1
A substance that can't be broken down into simpler substances using any chemical means is called?
Answers
A substance that cannot be broken down into simpler substances using any chemical means is called an "element".
An element is a pure substance that is made up of only one type of atom, and each element has a unique set of physical and chemical properties. Examples of elements include hydrogen, oxygen, carbon, gold, and iron. There are currently 118 known elements, organized on the periodic table based on their atomic structure and properties. In chemistry, a substance is a type of matter that has a constant composition and distinct properties. It is a form of matter that is made up of only one type of molecule, atom, or ion. A substance can be either an element or a compound. Elements are pure substances that cannot be broken down into simpler substances by chemical means, whereas compounds are substances that are made up of two or more different elements chemically combined in a fixed ratio.
Learn more about element here:
https://brainly.com/question/14347616
#SPJ4
Help plzzzz
Which of the following best describes the difference between a scientific theory and theories from other bodies of knowledge?
A.) Scientific theories must be based on experimental evidence, whereas theories from other bodies of knowledge are not always based on data.
"S
B.) Scientific theories are always true, whereas theories from other bodies of knowledge are usually proven to be false.
C.) scientific theories are unproven assumptions, whereas theories from other bodies of knowledge must be based on experimental evidence.
D.) Scientific theories are usually proven to be false, whereas theories from other bodies of knowledge are always true.
Answers
Answer:
option b is correct
..............
Answer:
it C not D btw
Explanation:
6 MARKER FOR CHEMISTRY I NEED THIS!!!
Answers
Answer:
when you put the marker in the water the water gets into the marker and it will change the solid color to a plain color witch means that the marker will make the water in the cup the color from the marker.
Hope I can help
A substance with a pH of 10 is how much more basic than a substance with a pH of 2?
Answers
Answer:
The same holds true for pH values above 7, each of which is ten times more alkaline (another way to say basic) than the next lower whole value. For example, pH 10 is ten times more alkaline than pH 9 and 100 times (10 times 10) more alkaline than pH 8.
Explanation:
A substance with a pH of 10 which is a base is 8 times more basic than a substance with a pH of 2.
What is a base?According to the Arrhenius concept, base is defined as a substance which yields hydroxyl ions on dissociation.These ions react with the hydrogen ions of acids to produce salt in an acid-base reaction.
Bases have a pH higher than seven as they yield hydroxyl ions on dissociation.They are soapy in touch and have a bitter taste.According to the Lowry-Bronsted concept, base is defined as a substance which accepts protons .Base react violently with acids to produce salts .Aqueous solutions of bases can be used to conduct electricity .They can also be used as indicators in acid-base titrations.
They are used in the manufacture of soaps,paper, bleaching powder.Calcium hydroxide ,a base is used to clean sulfur dioxide gas while magnesium hydroxide can be used as an antacid to cure acidity.
Learn more about base,here:
https://brainly.com/question/12445440
#SPJ2
Which of the following properties would helium have?
A. Closely packed and structured particles
B. Fills entire container
C. Definite volume
D. Definite shape
Reset Selection
Answers
Answer:
B
Explanation:
It is a gas and therefore according to particle model of matter it has large spaces between them and does not have a definite shape
Among the following properties, Helium would fills entire container. Hence Option (B) is correct.
What is States of Matter ?
A “state of matter” is a way to describe the behaviour of atoms and molecules in a substance.
There are three common states of matter: Solids – relatively rigid, definite volume and shape. In a solid, the atoms and molecules are attached to each other. They vibrate in place but don't move around.
Helium is a gas in nature and thus fills entire container.
Therefore, Among the following properties, Helium would fills entire container. Hence Option (B) is correct.
Learn more about States of Matter here ;
https://brainly.com/question/9402776
#SPJ2
Why do chemical reactions happen?
Answers
Answer:
They happen because each element reacting is trying to attain stability
Explanation:
E.g Mg +Cl>MgCl2
What is the correct formula that would
result from the combination of the two ionic species?
Na^1+ and l^1-
A: Nal
B: lNa
Answers
The correct formula that would result from the combination of Na^1+ and l^1- ions is NaI.
Explanation:
In this compound, the positively charged sodium ion (Na^1+) and the negatively charged iodide ion (I^-) combine to form an electrically neutral compound, which is written as NaI.
Help plz I have to get this done before 2:30 The diagram shows different forms of thermal energy transfer.
Which process is making the pot's handle hot?
O A. Conduction
B. Radiation
OC. Insulation
D. Convection
Answers
Answer:
Conduction.
Explanation:
Answer:
O A. Conduction
Explanation:
The other person did it
True or false The difference between solids and liquids is that solids have definite shape and volume, while liquids have no define volume
Answers
Answer:
False
Explanation:
Answer:
true! :) hope it helps
help quick, please i need to get this done tonight
Answers
The percent yield of the magnesium oxide in this context is 87.3%.
What is the percentage yield?We know that the percentage yield has to do with the amount of the product that we get from the reaction expressed as a percentage. We know that the combination of the magnesium and the oxygen molecule would lead to the formation of the magnesium oxide.
The oxygen and the magnesium are the reactants while the magnesium oxide is the product.
Mass of magnesium = Mass of magnesium and crucible - mass of crucible
= 38.06 g - 35.67 g
= 2.39 g
Number of moles of Mg = 2.39 g/24 g/mol
= 0.0996 moles
Mass of magnesium oxide = Mass of magnesium oxide and crucible - mass of crucible
= 39.15 g - 35.67 g
= 3.48 g
Number of moles of the magnesium oxide = 3.48 g/40 g/mol
= 0.087 moles
From the reaction;
2 moles of Mg produces 2 moles of MgO
Hence the theoretical yield of the Mgo is 0.0996 moles
Percent yield = Actual yield/ Theoretical yield * 100/1
= 0.087 moles/ 0.0996 moles * 100/1
= 87.3%
Learn more about percent yield:https://brainly.com/question/17042787
#SPJ1
if the concentration of no2 is found to be 0.0021 m in the equilibrium system what is the concentration of n2o4 under these conditions
Answers
The concentration of N2O4 under these conditions is 2.14 x 10^-8 M. Assuming the equilibrium system is represented by the following equation: 2 NO2 ⇌ N2O4
The equilibrium constant expression for this reaction is:
Kc = [N2O4] / [NO2]^2
We are given that [NO2] = 0.0021 M. Let's assume that x is the concentration of N2O4 at equilibrium. Then, using the equilibrium constant expression, we can write:
Kc = [N2O4] / [NO2]^2
Kc = x / (0.0021)^2
We can solve for x by rearranging the equation:
x = Kc * [NO2]^2
We need to know the value of the equilibrium constant, Kc, for this reaction. This can be determined experimentally or calculated from thermodynamic data. Let's assume that Kc = 4.6 x 10^-3 (this value is made up for the purposes of this example).
Substituting the values we know into the equation for x, we get:
x = (4.6 x 10^-3) * (0.0021)^2
x = 2.14 x 10^-8 M
Therefore, the concentration of N2O4 under these conditions is 2.14 x 10^-8 M.
Learn more about the equilibrium system here: brainly.com/question/4289021
#SPJ11
In the chemical formula for aluminum oxide, what would be the subscript for aluminum?
Group of answer choices
A. 2
B. 3
C. -2
D. -3
Answers
Aqueous hydrobromic acid will react with solid sodium hydroxide to produce aqueous sodium bromide and liquid water . Suppose 34. g of hydrobromic acid is mixed with 11.4 g of sodium hydroxide. Calculate the maximum mass of water that could be produced by the chemical reaction
Answers
Answer:
5.13g of H2O.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is given below:
HBr(aq) + NaOH(aq) —> NaBr(aq) + H2O(l)
Next, we shall determine the masses of HBr and NaOH that reacted and the mass of H2O produced from the balanced equation.
This is illustrated below:
Molar mass of HBr = 1 + 80 = = 81g/mol
Mass of HBr from the balanced equation = 1 x 81 = 81g
Molar mass of NaOH = 23 + 16 + 1 = 40g/mol
Mass of NaOH from the balanced equation = 1 x 40 = 40g
Molar mass of H2O = (2x1) + 16 = 18g/mol
Mass of H2O from the balanced equation = 1 x 18 = 18g
Thus, from the balanced equation above,
81g of HBr reacted with 40g of NaOH to produce 18g of H2O.
Next, we shall determine the limiting reactant. This is illustrated below:
From the balanced equation above,
81g of HBr reacted with 40g of NaOH.
Therefore, 34g of HBr will react with = (34 x 40)/81 = 16.79g of NaOH.
From the calculations made above, we can see that it will take a higher mass (i.e 16.79g) of NaOH than what was given (i.e 11.4g) to react completely with 34g of HBr.
Therefore, NaOH is the limiting reactant and HBr is the excess react.
Finally, we can determine the maximum mass of H2O produced as shown below.
In this case the limiting reactant will used because it will produce the maximum mass of H2O since all of it is consumed in the reaction.
The limiting reactant is NaOH and the maximum mass of H2O produced can be obtained as follow:
From the balanced equation above,
40g of NaOH reacted to produce 18g of H2O.
Therefore, 11.4g of NaOH will react to produce = (11.4 x 18)/40 = 5.13g of H2O.
Therefore, the maximum mass of H2O produced from the reaction is 5.13g.
After extracting the resulting solution with DCM you add all DCM layers to a test tube containing what?
Answers
After extracting the resulting solution with dichloromethane (DCM), you add all the collected DCM layers to a test tube containing an appropriate solvent or a drying agent.
The solution in the test tube could be a variety of things depending on the experiment, such as a reagent solution, a solvent solution, or a sample solution.
The purpose of adding the DCM layers to the test tube is to further isolate and purify the desired compound from the original mixture. The DCM layers contain the compound of interest, and by adding them to the appropriate solution, you can continue with further experimentation or analysis. It is important to ensure that the solution in the test tube is compatible with the DCM layers and will not interfere with the compound being isolated.
Overall, the addition of the DCM layers to the test tube is a crucial step in the extraction and purification process, and the solution used should be carefully chosen based on the specific experiment being conducted.
After extracting the resulting solution with dichloromethane (DCM), you add all the collected DCM layers to a test tube containing an appropriate solvent or a drying agent.
The purpose of this step is to remove any remaining impurities and water from the DCM layers, ensuring a clean and concentrated solution for further analysis or experimentation.
Depending on the specific extraction process and the compounds being targeted, the solvent or drying agent used may vary.
Examples of common drying agents include anhydrous sodium sulfate, magnesium sulfate, or calcium chloride.
Once the DCM layers are combined with the drying agent, the mixture is allowed to stand for a certain period of time, allowing the drying agent to absorb water and impurities.
Finally, the purified DCM solution can be separated from the drying agent by filtration, leaving you with a concentrated and clean solution for your subsequent steps in the process.
To know more about dichloromethane: brainly.com/question/25413988
#SPJ11
3) Two plants are grown using the same light and pots. One plant is given water that has been
microwaved and the other plant is given regular tap water. Their height is measured after 2 weeks.
What are the independent and dependent variables?
Answers
Answer:
Independent variable- nature of irrigation water
Dependent variable- height of the plants
Explanation:
In every study, there must be an independent and a dependent variable. The dependent variable changes its value as the value of the independent variable changes.
When the nature of irrigation water is manipulated, the height of the plant changes accordingly. This implies that the nature of irrigation water (microwaved or tap water) is the independent variable while the height of the plant (the response) is the dependent variable.
is no sulfate shampoo an acid, base, compound, mixture, or element?
Answers
Answer:free shampoo Here In Seconds! Easy to Use. Immediate Response - 24/7. Fast & Free. Highest Standards. Guaranteed Satisfaction. Serving You Better. Results in 5 Sec. or Less. Highly Qualified Search. 1,000,000 Unique Results. Immediate Results. Services: Search Services, Web Results, Result Pages.
Explanation:
why is it usually not possible to recrystallize a liquid substance?
Answers
Explain how dissolution occurs using the collision theory to help you explain.
Answers
The more the collisions in solute particles, then the more solvent particles will collide with them. So , solute particles having collision with the solvent particles will dissolve quick in the solution.
all of these quantities except one must be zero for this constant pressure process at 300k and 1 atm. which quantity is nonzero?
Answers
The nonzero quantity is Heat Transfer.
Heat Transfer is the only quantity that must be nonzero for a constant pressure process at 300K and 1 atm. This is because Heat Transfer is the amount of energy that is required to maintain constant pressure.
All other quantities in this process, such as Work, Internal Energy, and Enthalpy, are zero for a constant pressure process at a given temperature and pressure.
Therefore, the quantity that is nonzero for this constant pressure process at 300k and 1 atm is Heat Transfer.
To know more about Heat Transfer, refer here:
https://brainly.com/question/13433948#
#SPJ11