Which example is not a structural adaptation of animals?

NEED HELP ASAP

A. a tortoise shell to protect from predators

B. wings on a bird to get food and escape predators

C. a seal's thick fat to keep it from freezing

D. gosling following their mother to stay protected​

No, the enthalpy of neutralization for weak acid-strong base reactions will not be the same as for strong acid-strong base reactions.

This is because weak acids do not react as readily and completely with strong bases as strong acids do, resulting in a lower enthalpy of neutralization. Additionally, the extent of the reaction between a weak acid and a strong base will depend on the relative strengths of the two reactants, as well as the concentrations of the reactants.

Therefore, the enthalpy of neutralization for a weak acid-strong base reaction can vary depending on the specific reaction and the concentrations of the reactants.

Any neutralization reaction between a strong acid and strong alkali actually comes down to the same thing i.e.

H⁺ + OH⁻-------> H₂O,

as all the other ions present are spectator ions and so don't play an active part in the reaction. As the overall reaction is always the same irrespective of the acid or alkali the enthalpy change will also be the same.

If a weak acid is used the enthalpy change will be less exothermic as some of the energy evolved will be canceled out by the energy needed to complete the dissociation of the incompletely dissociated acid during the reaction

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An indicator of a chemical change which is shown in the image (see attachment) is: A.) formation of a gas.

A chemical change can be defined as a type of reaction that is typically characterized by a change in chemical composition and this leads to the formation of a new chemical substance.

This ultimately implies that, a chemical change would give rise to the chemical properties of matter by causing the transformation of one chemical substance into one or more different chemical substances.

In this context, we can infer and logically deduce that the formation of a gas is an indicator of a chemical change in the image (see attachment) shown below because the liquid turned to a gas when heat was applied.

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Complete Question:

Which indicator of a chemical change is shown?

A.) formation of a gas

B.) formation of a precipitate

C.) change in color

D.) change in energy

It is important to use series of boilers in the extraction of sucrose from sugarcane because it saves excess fuel costs and helps in the generation of electricity.

This is referred to as a separation technique which involves the removal of a substance from another such as stone from a solution etc.

In the case of the  extraction of sucrose from sugarcane, series of boilers are used and has its advantages such as saving excess fuel costs. It also helps in the generation of electricity which is therefore the reason why it was chosen as the correct choice.

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Answer: A. 27.43 kPa

Explanation:

Use the formula: PV/T = PV/T →

P(.776) / (298) = (32.6)(.664) / (303) →

.0026P = .07144 →

P = 27.43 kPa :)

None

Explanation:

methylene is an organic compound comprising and of One carbon and two hydrogens

Melting and freezing refer to the changes in state which occur when the solid and liquid states interchange. Melting occurs when a solid is heated and turns to a liquid and freezing occurs when a liquid is cooled and turns to a solid.

Answer:

Melting and freezing both require energy, however melting involves the speeding up of molecules, and freezing involves slowing them down

Explanation:

Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl

To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7.  Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.

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Solid lead nitrate is heated and forms solid lead oxide, gaseous nitrogen dioxide, and oxygen then it form of decomposition reaction

Lead nitrate is a white color inorganic powder with the chemical formula Pb ( NO₃)₂ when Lead nitrate decomposes it produces Lead oxide a yellow colored oxide of  brown colored Nitrogen dioxide gas, and colorless Oxygen gas and also it gives yellow colors

When lead nitrate is heated it decomposes to form lead oxide, nitrogen dioxide and oxygen from the reaction, we can see that lead nitrate decomposes on heating and forms lead oxide, nitrogen dioxide and oxygen thus, lead nitrate on decomposition gives lead oxide, nitrogen dioxide and oxygen and the lead nitrate and when solid lead nitrate heated it decomposes to produce light yellow solid lead monoxide, reddish-brown nitrogen dioxide gas and colourless oxygen gas

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The third law of thermodynamics describes the entropy of a: solid.

The third law of thermodynamics states that the entropy of a pure crystalline substance approaches zero as the temperature approaches absolute zero (0 Kelvin or -273.15 degrees Celsius). This law implies that at absolute zero, a perfectly ordered and pure crystalline solid will have zero entropy.

The third law of thermodynamics is not specific to liquids or gases but applies to solids. In a solid, the molecules are highly ordered and have fixed positions in a regular lattice structure. As the temperature decreases towards absolute zero, the thermal motion of the molecules reduces, and the system becomes more ordered, resulting in a decrease in entropy.

In contrast, liquids and gases have higher entropy compared to solids at absolute zero because their molecules have more freedom of movement and are not as tightly arranged. Therefore, the third law of thermodynamics specifically addresses the entropy of solids and does not apply to liquids or gases.

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Answer:

the most common oxidation no.of manganese is + 2 + 3 + 4 + 6 + 7

Explanation:

Answer:

neutrino is the radiation which have no effect 3 no

Answer: I'm not sure but i think its neutrino :)

FOR QUESTION 2

Explanation: The mass of an electron is so small compared to the mass of a proton and a neutron, that it is generally neglected when calculating the atomic mass of an element. A proton has a mass of about 1800 times that of an electron.

Answer:

add a substace devider

Explanation:

i forgot what it was called but there is a chemical that allows the substances to seperste and than you can test the substaces ph and what it is

Answer:

3.46

Explanation:

-log(3.50*10^-4) = 3.46

Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

Answer:

Its A

Explanation:

Answer:

a. 3.00 mol Al = 3.00 x 27.0 g/mol = 81.0 g

b. 2.56 × 10^24 atoms Li = 2.56 × 10^24 x 6.939 g/mol = 17.75 g

c. 1.38 mol N = 1.38 x 28.0 g/mol = 38.64 g

d. 4.86 × 10^24 atoms Au = 4.86 × 10^24 x 197.0 g/mol = 961.3 g

e. 6.50 mol Cu = 6.50 x 63.5 g/mol = 410.75 g

f. 2.57 × 10^8 mol S = 2.57 × 10^8 x 32.1 g/mol = 82,567,600 g

g. 1.05 × 10^18 atoms Hg = 1.05 × 10^18 x 200.6 g/mol = 210,000 g

To begin with, sucrose is C12H22O11. Additionally, we must determine how many moles of sucrose there are in a pound of sucrose:

The moles of sucrose are 454g, 342.30g, mol1, and 1.33mol.

Is sucrose a good sugar to use?

Brief Summary According to a University of California, Davis study that was published in the Journal of Clinical Endocrinology and Metabolism, sucrose, the more "natural form of sugar," may be just as harmful to your health as HFCS.

Is sugar a healthy food?

Your body only receives sugar when you consume sucrose like soda or candy, and typically too much of it. The threat is present here. You run the risk of major health problems if you consume too much added sugar (fructose or sucrose) in your diet.

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Answer:

\(m_{solvente}=2400mg\)

Explanation:

¡Hola!

En este caso, con la información dada, es posible inferir que este problema es acerca del porcentaje en masa del soluto y que se calcula de la siguiente manera, en términos de la masa de soluto y solución:

\(\% m=\frac{m_{soluto}}{m_{solucion}} *100\%\)

De este modo, como conocemos el porcentage y la masa del soluto, podemos calcular la masa de la solución primero:

\(m_{solucion}=\frac{m_{soluto}}{\% m} *100\%\\\\m_{solucion}=\frac{600mg}{20\%} *100\%\\\\m_{solucion}=3000mg\)

Esto quiere decir que la masa del solvente es:

\(m_{solvente}=m_{solucion}-m_{soluto}\\\\m_{solvente}=3000mg-600mg\\\\m_{solvente}=2400mg\)

¡Saludos!

The molarity of a solution is given by the following formula:

Replace for the given values in the equation and find the molarity:

It means that the molarity of the solution is 2.25M.

While both the South African plain and marine ecosystems have biotic and abiotic factors that support life, the specific organisms and environmental conditions are very different due to the unique characteristics of each ecosystem.

What is Biotic factors?

Biotic factors are living organisms that shape an ecosystem. These include all living things, such as plants, animals, fungi, and bacteria, and their interactions with each other and with their environment. Biotic factors can influence the physical environment, such as by altering the availability of nutrients, or they can directly affect other living organisms through predation, parasitism, or competition.

Biotic factors:

The South African plain ecosystem is home to a variety of large herbivores, such as elephants, zebras, and antelopes, as well as predators like lions and hyenas. The marine ecosystem, on the other hand, is dominated by aquatic animals like fish, whales, dolphins, and sharks, as well as smaller organisms like plankton and algae.

Both ecosystems support a variety of bird species, although the types of birds may differ.

Abiotic factors:

The South African plain ecosystem is characterized by a hot, dry climate with seasonal rainfall. The soil is often sandy and nutrient-poor. In contrast, the marine ecosystem is characterized by a high salinity and a consistent temperature and pressure.

Both ecosystems may experience periodic droughts, although the effects on the organisms living in each ecosystem may differ.

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Answer:

Removing heat causes water (a liquid) to freeze to form ice (a solid). When water changes to a solid or a gas, we say it changes to a different state of matter. ... This causes the hydrogen atoms in one water molecule to be attracted to the oxygen atom in another water molecule.

Explanation:

Answer:

The charge carried by each ion (oxidation state of each atom)

Explanation:

If we have an ionic compound and we want to write its formula, we must first know the magnitude of charge on each ion (shown as oxidation state of the atoms involved) because the magnitude of charge on each ion is eventually crisscrossed and gives the subscript (number of atoms) for each atom in the formula.

For instance, let us write the formula of calcium bromide. Ca has a charge of +2 while Br has a charge of -1. If we exchange the charges and ignore the signs such that the crisscrossed charges form subscripts we can now write; \(CaBr_{2}\).

From the calculations, the amount of product formed is 3 moles of AlCl3

A chemical reaction is said to take place when two or more substances are combined to yield products.

The equation of the reaction is;

Al(NO3)3 + 3NaCl ------> 3NaNO3 + AlCl3

Given that 1 mole of Al(NO3)3 reacts with 3 moles of NaCl

x moles of Al(NO3)3 reacts with 9 mols of NaCl

x = 3 moles

This implies that NaCl is the limiting reactant.

If 3 moles of NaCl gives 1 moles of AlCl3

9 moles of NaCl gives 9 moles * 1 mole / 3 moles

= 3 moles of AlCl3

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Answer:

hi

Explanation:

Light is the result of electrons moving between defined energy levels in an atom, called shells.

The formula for the compound depicted in the image above is Al₂O₃ (option D).

Chemical or molecular formula is a notation indicating the number of atoms of each element present in a compound.

The chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus and minus signs.

According to this question, two atoms of aluminium and three atoms of oxygen were given. This means that when they chemically combine, the chemical formula of the resulting molecule will be Al₂O₃.

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Step 1: Identify new concepts in the course.

Step 2: Describe five new concepts - linear equations, quadratic equations, functions, exponents/logarithms, probability/statistics.

Step 3: Explain how these concepts relate to everyday activities, including budgeting, modeling, data analysis, finance, and decision-making.

Step 1: New concepts learned in the course so far.

1. Linear equations: Understanding how to solve and graph linear equations.

2. Quadratic equations: Learning how to solve and graph quadratic equations.

3. Functions: Understanding the concept of functions, including domain, range, and transformations.

4. Exponents and logarithms: Exploring the properties and applications of exponents and logarithms.

5. Probability and statistics: Learning about probability, data analysis, and statistical measures.

Step 2: Description of five new concepts.

1. Linear equations: These are equations that represent a straight line when graphed. They involve variables with a power of 1 and have a constant rate of change.

2. Quadratic equations: These are equations that involve a variable raised to the power of 2. They can be graphed as parabolas and have various applications in physics, engineering, and optimization problems.

3. Functions: A function is a relation between a set of inputs (domain) and a set of outputs (range). It represents a specific relationship between variables and is used to model real-world phenomena.

4. Exponents and logarithms: Exponents are a shorthand way of representing repeated multiplication, while logarithms are the inverse operation of exponents. They are used in various fields, including finance, population growth, and signal processing.

5. Probability and statistics: Probability deals with the likelihood of events occurring, while statistics involves collecting, analyzing, and interpreting data. These concepts are crucial for decision-making, risk assessment, and understanding trends in data.

Step 3: Importance of these concepts in everyday activities.

These concepts have significant applications in everyday activities. For instance:

- Linear equations help in managing personal finances, such as budgeting and tracking expenses.

- Quadratic equations are used in fields like engineering, physics, and computer science to model and optimize real-world systems.

- Functions are present in various aspects of daily life, from calculating distances traveled to predicting future trends based on historical data.

- Exponents and logarithms are used in finance for compound interest calculations, in scientific research for exponential growth or decay phenomena, and in analyzing signal strength in telecommunications.

- Probability and statistics help in making informed decisions based on data, such as determining the likelihood of an event occurring or analyzing trends in market research.

Overall, these concepts provide a foundation for understanding and solving problems in different areas of life, from personal finance to scientific research, and enhance critical thinking and problem-solving skills.

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The most likely answer is d. exogenous. Pigment refers to any substance that imparts color to a tissue or organism.

In this context, pigment lying on top of the tissue suggests that it has been introduced from an external source rather than being produced within the tissue itself. Endogenous pigments, such as melanin or hemoglobin, are produced by the body and are not typically found lying on top of tissues. Anthracotic pigments are a type of endogenous pigment that result from the accumulation of carbon particles, usually from environmental pollution. Artifacts are objects or substances that are introduced during tissue preparation or analysis, and are not typically found on the tissue itself.

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The dating technique described in your question, which involves counting the frequency of fission tracks in a sample and comparing it to the known rate of fission, is called fission track dating.

This method relies on the decay of uranium-238, which has a half-life of 8.2 x 10¹⁵ years.

When uranium-238 undergoes fission, the resulting fragments are violently repelled from each other, leaving behind track-like scars in materials such as crystalline substances and obsidian.

By measuring the number of fission tracks in a sample and knowing the rate of fission, archaeologists can estimate the age of the sample.

Fission track dating has been used to determine the ages of various geological and archaeological materials.

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