PLEASE HELP 50 POINTS!!!!!
Instructions: Follow the directions below to complete part one and part two of this activity. You will submit both parts once completed.
Note: You are not performing the experiment—only designing it.
________________________________________
Introduction
The purpose of this assignment is to design an experiment that another student could follow and use to test whether land or water heats faster.
You will complete the following:
• Part One: Experimental Design. Plan out an experiment by answering the guiding questions below.
• Part Two: Design a Lab Report. Write the outline of a lab report so that another student could complete the experiment by using the materials listed below:



THE QUESTION: What would an effective conclusion need to include?

Answer: B disposed of according to your instructor's

directions. :)

Answer:

B. disposed of according to your instructor's  directions.

Explanation:

After completing an experiment all chemical waste should be disposed of according to your instructor's directions.

Chemical wastes should be carefully handled in the laboratory so as not to carelessly release them into the environment. If not properly treated and they are discharged into the environment, they can lead to serious hazards and even pollution. Contamination is another very serious problem attributed to disposing chemical waste carelessly.

Instructor's guides should be followed to dispose chemical wastes.

Answer:

The answer is valance shell.

Valance shell is the outermost shell of an atom which contains valance electrons on it of an atom of an elements.

Hope it helps....

False. The densest water is produced at high latitudes where the water is cold and has a high concentration of dissolved salts, causing it to be more dense. This dense water sinks to the ocean floor and spreads to lower latitudes, where it has a significant impact on global ocean circulation.

The densest water is known as North Atlantic Deep Water, which is the densest and coldest water in the ocean. It is formed in the North Atlantic Ocean near the Labrador Sea and Greenland, where the water is cooled by the atmosphere and becomes denser due to the high concentration of dissolved salts.

Dense water then sinks to the ocean floor and spreads to other parts of the world ocean playing a crucial role in the global ocean circulation system.

North Atlantic Deep Water is one of the most important and well-studied water masses in the ocean, as it has a significant impact on the Earth's climate and weather patterns.

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Answer:

The Rio Grande drainage basin (watershed) has an area of 182,200 square miles (472,000 km2)

The gas phase decomposition of ethyl chloroformate (ClCOOC2H5C2H5Cl) produces carbon dioxide (CO2). The given information states that the rate constant at k is /s and the rate constant at k is /s. Additionally, the activation energy for the gas phase decomposition of ethyl chloroformate is given as kj/mol.

To further explain, the rate constant (k) is a measure of how quickly a reaction occurs. It represents the proportionality constant between the concentration of the reactants and the rate of the reaction.

In this case, the decomposition of ethyl chloroformate is a chemical reaction in which it breaks down into carbon dioxide. The rate constant (k) provides information about the speed at which this decomposition occurs.

The rate constant at k is /s indicates the rate of the decomposition reaction when the reactants are at a certain temperature and pressure. Similarly, the rate constant at k is /s represents the rate of the reaction at a different temperature and pressure.

The activation energy (Ea) is the minimum energy required for a reaction to occur. In the given information, it is specified as kj/mol. This means that in order for the decomposition of ethyl chloroformate to take place, a minimum energy of kj/mol must be provided.

It is important to note that the activation energy affects the rate constant. As the activation energy increases, the rate constant decreases, resulting in a slower reaction. Conversely, when the activation energy decreases, the rate constant increases, leading to a faster reaction.

In summary, the given information provides the rate constants (k) for the decomposition of ethyl chloroformate at different conditions, as well as the activation energy (Ea) required for the reaction to occur. The rate constant reflects the speed of the reaction, while the activation energy represents the minimum energy needed for the reaction to take place.

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1) The activation energy is 80 kJ

2) I represents the activation energy

3) The change in energy is 20 kJ

4) The reaction is endothermic

5) After the catalyst was added the activation energy decreased to 50 kJ

6) The activation energy after the catalyst was added is II

The very minimum of energy needed for a chemical reaction to take place is called activation energy. In order for reactant molecules to transform into products, the energy barrier must be broken.

Chemistry places a lot of emphasis on the idea of activation energy since it affects how quickly a reaction proceeds. The reaction moves more slowly the larger the activation energy.

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Answer: Unused glucose is stored mainly in the liver as glycogen.

Explanation: The body breaks down most carbohydrates from the foods we eat and converts them to a type of sugar called glucose. Glucose is the main source of fuel for our cells. When the body doesn't need to use glucose for energy, it stores it in the liver and muscles. This stored form of glucose is made up of many connected glucose molecules and is called glycogen. When the body needs a quick boost of energy or when the body isn't getting glucose from food, glycogen is broken down to release glucose into the bloodstream to be used as fuel for the cells.

When the body doesn't need to use glucose for energy, it stores it in the liver and muscles.

Answer: pretty sure its 0.214 moles * 40.3g/mole = 8.6g (2 sig figs) of MgO, and

0.035 moles * 40.3g/mole = 1.4g of MgO

Explanation:

The molecular formula of the base peak fragment is C4H7O.

The base peak of the mass spectrum corresponds to the most stable fragment ion, which is typically the result of the most favorable cleavage of a bond in the molecular ion.

To determine the molecular formula of the base peak fragment, we need to identify the possible fragmentation pathways for 3-pentanone. One common fragmentation is the loss of a methyl group (15 amu) from the molecular ion (m/z = 86), which gives a fragment ion with m/z = 71.

Another common fragmentation is the loss of a carbonyl group (43 amu) from the molecular ion, which gives a fragment ion with m/z = 43.Since the base peak has m/z = 57, it cannot be the result of either of these fragmentations. Instead, it is likely the result of a more complex fragmentation pathway, such as a McLafferty rearrangement.

In a McLafferty rearrangement, the molecular ion undergoes a bond cleavage that leads to the formation of a carbonyl group on one fragment and a double bond on the other. This can occur if the molecular ion has a specific combination of functional groups and carbon-carbon bonds.

In the case of 3-pentanone, a possible McLafferty rearrangement involves the cleavage of the bond between the α-carbon and the carbonyl carbon, followed by the rearrangement of the resulting fragments to form a new carbonyl group on the α-carbon.

The resulting fragment ion has the formula C4H7O, which corresponds to an alkene with a carbonyl group on the second carbon. This is consistent with a McLafferty rearrangement of 3-pentanone, and explains why the base peak has m/z = 57.

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The last third-party candidate to win one or more states was George Wallace of the American Independent Party in 1968.

Who was George Wallace?

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The intermolecular forces present between two molecules of HI (hydrogen iodide) are dispersion forces (also known as London dispersion forces). Therefore, the correct answer is A) dispersion only.

Dispersion forces are the weakest type of intermolecular forces and occur between all molecules, regardless of their polarity. These forces result from temporary fluctuations in electron distribution, leading to the formation of temporary dipoles. In the case of HI, both hydrogen and iodine atoms have electrons that are constantly in motion, causing temporary imbalances in electron distribution and resulting in the formation of temporary dipoles.

The hydrogen iodide (HI) molecule consists of a hydrogen atom bonded to an iodine atom. Hydrogen has a relatively positive charge due to its low electronegativity, while iodine has a relatively negative charge due to its high electronegativity. This polarity within the molecule gives rise to a dipole-dipole interaction between HI molecules. However, in this case, the dipole-dipole interaction is not strong enough to be considered a significant intermolecular force.

Instead, the dominant intermolecular force between HI molecules is dispersion forces. Dispersion forces occur due to temporary fluctuations in electron distribution. In the case of HI, the movement of electrons creates temporary dipoles, resulting in attractive forces between neighboring molecules. Since dispersion forces are present between all molecules, regardless of their polarity, they are the primary intermolecular force in HI. Other intermolecular forces such as hydrogen bonding or dipole-dipole interactions are not significant in HI molecules.

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Answer:

They use the pH scale

Explanation:

The strong acid and strong base has high rate constant of dissociation. Weak acid and base are the one whose rate constant for the dissociation is low, they do not dissociate readily in water. Scientist use pH scale to classify substances that are either an acid or a base.

Acid is a solution which releases H⁺ hydrogen ion when dissolved in water. Base are the solution which releases hydroxide ion OH⁻ ion when dissolved in water. . At room temperature pH scale is between 0 to 14. pH of neutral solution is 7.

The pH of acid is between 0-7 on pH scale. acid turns blue litmus paper to red. Acids have sour taste and corrosive nature. Mathematically the concentration of hydrogen ion can be calculated using this formula

Mathematically,

pH=-log[H⁺]

Therefore, scientist use pH scale to classify substances that are either an acid or a base.

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If the heat capacity of the bomb calorimeter is 9.96 kj/°c, then the amount of heat released from combustion of 2 g of wood is 39.84 kJ.

To determine the amount of heat released from combustion of 2 g of wood, you need to use the formula

Q = C × ΔT Where:Q is the heat released or absorbed in joules (J)C is the heat capacity of the bomb calorimeter (given as 9.96 kJ/°C)ΔT is the change in temperature in degrees Celsius (°C)We can assume that all the heat released from the combustion of the wood is absorbed by the calorimeter, so we can use the heat capacity of the calorimeter to calculate the heat released. Since the calorimeter absorbs the heat, the value of Q will be negative (i.e. the heat is released).

Given: Mass of wood = 2 g Heat capacity of the bomb calorimeter = 9.96 kJ/°C First, we need to calculate the change in temperature. This can be done by measuring the temperature of the calorimeter before and after combustion. Let's assume that the temperature increases by 4.0 °C.ΔT = 4.0 °C Now, we can calculate the heat released: Q = C × ΔTQ = (9.96 kJ/°C) × (4.0 °C)Q = 39.84 kJ

Therefore, the amount of heat released from combustion of 2 g of wood is 39.84 kJ.

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Answer:

\(\Large \boxed{\mathrm{A}}\)

Explanation:

Rust formed from iron and oxygen combining is a chemical change, because in a chemical change, the resulting substance(s) will have different properties from the substance(s) before the chemical change.

I cant comment... So is it Right?

From the calculation, the binding energy of the oxygen atom is 1.98 * 10^11 J

The term binding energy has to do with the energy that must be supplied to the nucleus of an atom for the nucleus of the atoms to be bonded together.

We must note that;

E = mc^2

E =  2.20 × 10 -28 kg * ( 3 * 10^8m/s)^2 = 1.98 * 10^11 J

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Answer:

1.98 × 10 -11 J

Explanation:

edg

1a)  The net ionic equation for the reaction between aqueous sodium acetate and hydroiodic acid is:$\text{H}^+(\text{aq}) + \text{C}_2\text{H$\text{H}^+(\text{aq}) + \text{C}_2\text{H}_3\text{O}_2^-(\text{aq}) + \text{I}^-(\text{aq}) \rightarrow \text{HC}_2\text{H}_3\text{O}_2(\text{aq})$}_3\text{O}_2^-(\text{aq}) + \text{I}^-(\text{aq}) \rightarrow \text{HC}_2\text{H}_3\text{O}_2(\text{aq}) + \text{Na}^+(\text{aq})$. 1b) Therefore, the net ionic equation for the reaction between aqueous silver(I) nitrate and sodium phosphate is: $\text{Ag}^+(\text{aq}) + \text{PO}_4^{3-}(\text{aq}) \rightarrow \text{Ag}_3\text{PO}_4(\text{s})$.

Aqueous solutions are solutions where the solvent is water. In chemistry, ionic reactions involve the transfer of electrons between ions to form new compounds. The net ionic equation only shows the species that are involved in the reaction and excludes spectator ions, which do not participate in the reaction. To write the net ionic equation, we need to identify the ions that are involved in the reaction. The dissociation of the ionic compounds is as follows:
$\text{NaC}_2\text{H}_3\text{O}_2(\text{aq}) \rightarrow \text{Na}^+(\text{aq}) + \text{C}_2\text{H}_3\text{O}_2^-(\text{aq})$

$\text{HI}(\text{aq}) \rightarrow \text{H}^+(\text{aq}) + \text{I}^-(\text{aq})$

The balanced equation for the reaction between aqueous sodium acetate and hydroiodic acid is:
$ \text{NaC}_2\text{H}_3\text{O}_2(\text{aq}) + \text{HI}(\text{aq}) \rightarrow \text{NaI}(\text{aq}) + \text{HC}_2\text{H}_3\text{O}_2(\text{aq})$

The balanced equation for the reaction between aqueous silver(I) nitrate and sodium phosphate is:
\ce{AgNO3(aq) + Na3PO4(aq) -> Ag3PO4(s) + 3NaNO3(aq)}. To write the net ionic equation, we need to identify the ions that are involved in the reaction. The dissociation of the ionic compounds is as follows:
\ce{AgNO3(aq) -> Ag+(aq) + NO3-(aq)}
\ce{Na3PO4(aq) -> 3Na+(aq) + PO4^3-(aq)}

The net ionic equation is obtained by canceling out the spectator ions, which are the sodium ion (Na+) and the nitrate ion (NO3-): $\text{Ag}^+(\text{aq}) + \text{PO}_4^{3-}(\text{aq}) \rightarrow \text{Ag}_3\text{PO}_4(\text{s})$

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When deionized water was added to the blue solution, the equilibrium shifted, as evidenced by the color change. The value of the equilibrium constant, k was changed by the addition of more reactants.

When a strong acid is added to a prepared buffer solution, the pH change is minimal due to the presence of a weak acid and its conjugate base in the buffer. These components work together to neutralize the added acid, maintaining the pH within a certain range. In contrast, when the strong acid is mixed with deionized water, the pH change is more significant because there are no buffering agents to neutralize the acid.

Based on the results obtained, the prepared buffer solution effectively resisted pH changes when minimal amounts of acid or base were mixed into the solution. A buffer solution is a solution that is capable of resisting changes in pH when small amounts of acid or base are added to it. A buffer solution typically consists of a weak acid and its conjugate base or a weak base and its conjugate acid.

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Answer:

drops a glass cup of water outcome mad parents

Explanation:

Mad pagents mean death no surviva.

The half-life of iron-59 if 109 days are required for the activity of a sample of iron-59 to fall to 18.4 percent of its original value is 44.8 days.

The half-life of iron-59 can be determined using the formula:

Final activity = Initial activity * (1/2)^(time elapsed / half-life)

In this case, the final activity is 18.4% (0.184) of the initial activity. The time elapsed is 109 days. We need to find the half-life (T).

0.184 = 1 * (1/2)^(109 / T)

To solve for T, first take the logarithm base 2 of both sides:

log2(0.184) = 109 / T

Then, solve for T:

T = 109 / log2(0.184)

T ≈ 44.8 days

The half-life of iron-59 is approximately 44.8 days.

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The experimental approach used to analyze the metal content in the precipitate of soap produced by reaction 1 was 0.1 M HCl(aq), then titrated with standard 0.1 M NaOH(aq) using an indicator.

Soap precipitate is a salt of a weak base. The addition of HCl produces free fatty acids, which can then be neutralized with NaOH. The difference between the number of moles of HCl and NaOH required to reach the endpoint gives the number of moles of RCO₂, which can then be used to calculate the mass and percent of the metal in the solid.

Complete questions:

Which experimental approach can be used to analyze the metal content of the soapy precipitate produced by Reaction 1?

M₂+(aq) + 2NaC₁₇H₃₂CO₂(aq) → 2Na+(aq) + M(C₁₇H₃₂CO₂)₂(s)

Dissolve the solid in a known volume of:

The true choice is D

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Answer:

kinetic theory

Explanation:

The concept that all matter is made of tiny particles in constant motion is called the Kinetic Theory

Answer:

The rest of the energy is passed on as food to the next level of the food chain. The figure at the left shows energy flow in a simple food chain. Notice that at each level of the food chain, about 90% of the energy is lost in the form of heat.

Answer:

A chemical bond is formed and energy is absorbed I do believe

Explanation:

Carol Dweck contends that adopting a growth mindset can help people increase intellectual achievement, promote conflict resolution, reduce aggression, improve willpower, and nurture race relations. According to Dweck, a growth mindset is the belief that one's abilities and intelligence can be developed through dedication and hard work.

This belief can lead to a desire to learn and improve, as well as a willingness to take on challenges and persevere through obstacles. In the context of intellectual achievement, a growth mindset can lead individuals to embrace challenges, learn from criticism, and persist through difficulties. This can lead to greater success in academic and professional pursuits. In terms of conflict resolution, a growth mindset can foster a willingness to listen to and understand different perspectives, leading to more constructive and productive conversations.

Reducing aggression can also be a result of adopting a growth mindset, as individuals with this mindset tend to focus on self-improvement rather than comparing themselves to others or seeking external validation. This can lead to a greater sense of self-worth and less aggression towards others. Improving willpower is another potential benefit of a growth mindset, as individuals with this mindset tend to view setbacks and challenges as opportunities for growth rather than failures. This can lead to greater resilience and the ability to persevere through difficult situations. Finally, a growth mindset can also nurture race relations by promoting a belief in the potential for change and improvement, both individually and collectively. This can lead to a greater willingness to listen to and understand different perspectives, as well as a greater sense of empathy and compassion towards others.

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Answer:

45

Explanation:

135 divided by 3 is 45

I hope it's right! Don't get discouraged if you can't find an answer!

The phenomenon known as "positive selection" occurs under conditions where a strong selection pressure acts on a particular change in an amino acid.

Positive selection is a process that leads to the fixation of a beneficial mutation in a population, and it is often associated with adaptations to new environmental conditions or host-pathogen interactions.

Positive selection can be detected by comparing the rates of non-synonymous (amino acid-changing) and synonymous (silent) substitutions in protein-coding genes, and it has important implications for understanding the evolution of molecular pathways and the emergence of novel functions.

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