Calculate the number of grams Fe2O3 produced from 8.93 g 02.
4 Fe +302 → 2 Fe2O3

Factors that influence general adaptation syndrome include that of a person’s health, nutrition, sex, ages, race, socioeconomic status, and genetics. These are factors that are either can precipitate a different reaction, while others are modifiable and unmodifiable traits.

In biology, adaptation has 3 related meanings. Firstly, it is the dynamic evolutionary process that fits organisms to their environment, enhancing their evolutionary fitness. Secondly, it is a state reached by the population during that process. Thirdly, it is a phenotypic trait or adaptive trait, with a functional role in each organism, that is maintained and has evolved through natural selection.  Historically, adaptation has been described from the time of the ancient Greek philosophers such as Empedocles and Aristotle. In 18th and 19th century natural theology, adaptation was taken as evidence for the existence of a deity. Charles Darwin proposed instead that it was explained by natural selection.  Adaptation is related to biological fitness, which governs the rate of evolution as measured by a change in gene frequencies. Often, two or more species co-adapt and co-evolve as they develop adaptations that interlock with those of the other species, such as with flowering plants and pollinating insects. In mimicry, species evolve to resemble other species; in Müllerian mimicry, this is a mutually beneficial co-evolution as each of a group of strongly defended species (such as wasps able to sting) come to advertise their defenses in the same way. Features evolved for one purpose may be co-opted for a different one, as when the insulating feathers of dinosaurs were co-opted for bird flight.  Adaptation is a major topic in the philosophy of biology, as it concerns function and purpose (teleology). Some biologists try to avoid terms that imply purpose in adaptation, not least because it suggests a deity's intentions, but others note that adaptation is necessarily purposeful.

Answer:

what did i observe?

Explanation:

State​ physical property can be used to distinguish between a 1 cm cube of copper and a 1 cm cube of sugar. Hence, option D is correct.

A property (such as colour, hardness, boiling point) of the matter is not involved in its manifestation of a chemical change.

Physical properties are those general properties you notice most readily about a substance, such as its size, state of matter (solid, liquid, or gas), colour, mass, density and strength.

Values for physical properties can be determined by tests that don't alter the substance being tested.

Hence, state​ physical property can be used to distinguish between a 1 cm cube of copper and a 1 cm cube of sugar.

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Answer:

2450000 gram

Explanation:

v= m × ρ= 1 cubic meter × 2.45 gram/cubic centimeter= 1000000 cubic centimeter × 2.45 gram/cubic centimeter= 2450000 gram

Explanation:

v=m over D

mass=20.oog

Density=2.45g

20.00-2.45

ans is 17.46

Answer:

Atoms,

Molecules

The states of matter of the materials;

1) Dispersion forces - Yes

2) Hydrogen bonding - No

3) Ionic - No

4) Dispersion forces - No

5)  Dispersion forces - Yes

6) Ionic  - No

7) Hydrogen bonding - No

Sublimation is a physical process in which a substance transitions directly from its solid phase to its gaseous phase without passing through the intermediate liquid phase. In sublimation, the solid substance is heated, and the resulting gas molecules escape from the solid lattice structure without the need for melting.

One common example of sublimation is the process of dry ice. Dry ice is solid carbon dioxide (CO2) that sublimes at a temperature of -78.5 degrees Celsius (-109.3 degrees Fahrenheit). When dry ice is exposed to room temperature, it transitions directly from a solid to a gas, producing a fog-like effect.

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The correct matches for changes of state are:

Change of state is the process whereby matter in one physical state is converted to matter in another state by the addition or removal of heat.

The process of change of state are:

Considering the given diagram, the correct matches are:

In conclusion, change of state of matter occurs due to heat changes.

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1. Water flows through the penstock

2. The water then spins the blades in a turbine which, in turn, spins a generator that ultimately produces electrical energy

Hydropower, or hydroelectric power, is one of the oldest and largest sources of renewable energy, which uses the natural flow of moving water to generate electrical energy. The moving water is passed through a pipe also known as penstock, it then turns the blade of the turbine. which then rolls or spin a generator thereby electricity is produced.

The work of the turbine is to convert the kinetic energy of the running water into useable energy.

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This problem is referring to an anhydrous salt that is derive from a hydrated Epson salt (magnesium sulfate hydrate) and the atom economy is required. However, not enough information is provided, yet we can use the attached file as a reference to provide a methodology of calculation.

To begin with, we need to calculate the \(x\) which refers to the degree of hydration of the salt, so that we use the mass before and after heating the sample to figure out the grams and subsequently moles of water that are in there:

\(m_w=3.648g-1.782g=1.866g\\\\n_w=0.103molH_2O\)

Next, since 1.782g corresponds to the anhydrous salt, we calculate the moles in such a amount:

\(1.782gMgSO_4*\frac{1molMgSO_4}{120.4gMgSO_4}=0.0148mol\)

Then, we divide the moles of water by those of the anhydrous salt to calculte \(x\):

\(x=\frac{0.103mol}{0.0148mol} =6.96=7\)

This means the formula of the hydrate is:

\(MgSO_4\ 7H_2O\)

Finally, for the atom economy we just divide the molar mass of the anhydrous salt by that of the hydrate:

\(A.E=\frac{120.4g/mol}{246.47g/mol} *100\%\\\\A.E=48.8\%\)

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Answer:

3.0grams/ml

density is a ratio of mass to volume

that implies 30grams/10ml

you can get a different answer depending on the unit

The feature of object-oriented computing is an encapsulation of states. The correct option is b.

Object-oriented computing, the short form, is OOP. A computer programming paradigm known as object-oriented programming (OOP) arranges the architecture of software around data or objects rather than functions and logic.

An object is a data field with particular characteristics and behavior. It contains data and codes. It is stored in the form of a procedure. Furthermore, it is a programming paradigm.

Thus, the correct option is b. encapsulation of states.

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Answer:The empirical formula for this vitamin : C₃H₄O₃

Further explanation  

The empirical formula is the smallest comparison of atoms of compound =mole ratio of the components

The principle of determining empirical formula

Determine the mass ratio of the constituent elements of the compound.  

Determine the mole ratio by dividing the percentage by the atomic mass

Mass of C in CO₂ :(MW C = 12 g/mol, CO₂=44 g/mol)

Mass of H in H₂O :(MW H = 1 g/mol, H₂O = 18 g/mol)

Mass O = Mass sample - (mass C + mass H) :

mol ratio C : H : O =

Explanation:

Answer: The reaction between benzil and dibenzyl ketone to form 1,2-dibenzylidenecyclohexanone is:

2 C14H12O + NaOEt → C20H18O + H2O + NaOAc

The molar mass of benzil is 210.25 g/mol, and the molar mass of dibenzyl ketone is 234.30 g/mol. Using the given masses of each reactant, we can calculate the number of moles of each:

moles of benzil = 0.3 g / 210.25 g/mol = 0.001426 mol

moles of dibenzyl ketone = 0.5 g / 234.30 g/mol = 0.002133 mol

Based on the balanced equation, the stoichiometric ratio between benzil and dibenzyl ketone is 1:1, meaning they react in a 1:1 ratio. Since the number of moles of benzil is less than the number of moles of dibenzyl ketone, benzil is the limiting reagent.

To find the theoretical yield of the product, we need to determine the amount of the limiting reagent that reacts. Since benzil is the limiting reagent and reacts in a 1:1 ratio with dibenzyl ketone, the moles of product formed will also be equal to 0.001426 mol.

The molar mass of the product is 286.37 g/mol. Using the moles of product, we can calculate the theoretical yield:

theoretical yield = 0.001426 mol x 286.37 g/mol = 0.408 g or 408 mg

Therefore, the theoretical yield for this reaction is 0.408 g or 408 mg.

The statement "the reaction between R and P appeared to stop when no further changes were observed" suggests that the observable changes in the reaction have ceased. However, chemical reactions may not actually "stop" completely even when no further changes are visibly observed.

Chemical reactions occur at the molecular level, where individual molecules collide and undergo chemical transformations. Even if the macroscopic changes or observable properties appear to have reached a steady state, the molecular-level reactions can continue at an equilibrium. In other words, while the overall concentrations or properties of the reactants and products may remain constant, the individual molecules are still undergoing constant microscopic fluctuations and interconversions.

In such cases, the reaction is considered to be in a dynamic equilibrium, where the forward and reverse reactions occur at equal rates, resulting in no net change in the macroscopic observable properties. This state of equilibrium does not imply that the reaction has completely stopped but rather that the rates of the forward and reverse reactions have balanced out.

Therefore, even when no further changes are observed at the macroscopic level, chemical reactions can continue at the molecular level in a dynamic equilibrium state.

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Answer:

changes that dont result in the formation of new substance with new properties.

Answer:

832.5 calories

Explanation:

One ounce bag of Hot Cheetos contains 90 calories from fat and 150 total calories. Also a party size bag of hot Cheetos weigh 18.5 ounces.

Therefore the weight of half of a bag of party-size chips = Size of a party size bag of hot Cheetos / 2 = 18.5 ounces / 2 = 9.25 ounces.

Since one ounce bag of Hot Cheetos contains 90 calories from fat, the amount of fat contained in half a bag of party-size chips (9.25 ounces) is given as:

Calories of fat in half a bag of party-size = 90 calories per ounce × 9.25 ounces = 832.5 calories

Answer:

832.5 calories

Explanation:

The correct abbreviation for each metric unit is:

Kilogram - kg, Milliliter - ml, Kilometer- Km, Meter- m, Millimeter - mm, Centimeter - cm, Gram - g,  Liter - L, and Milligram - mg.

The metric system can be described as a system of measurement that succeeded the decimalized system based on the meter.  Each of the fundamental dimensions can be expressed by a single base unit of measure.

For quantities derived from the base units of the system, units derived from the base units are used such as the square meter being the derived unit for the area, a quantity derived from length.

Metric units can be described as units based on the meter, gram, or second and decimal multiples or sub-multiples of these. The units of the International System of Units (SI). By extension, they involve units of electromagnetism from the CGS units and SI units systems.

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Lowering the pressure in a container will cause the liquid in the container to boil faster because it becomes easier for the molecules to escape.

Boiling happens when the vapor pressure of a liquid equals the atmospheric pressure.

By lowering the atmospheric pressure, the vapor pressure of a liquid takes a lower time to equal the atmospheric pressure.

Thus, it becomes easier for the molecules of the liquid to escape from each other.

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Answer:

Explanation:

This is an aluminum atom with 13 proton because from what henry said in the year 1914 he said that the number of protons of an element is equal to the number of electrons for an neutral atom..an you expect the number of electrons to be the atomic number.( The number that is used to locate the elements in the periodic table (1869).

And the number of neutron is 13 because form the mass number of the elements and we no that the mass number of an element is the sum of the proton and the neutron..MN=P + N.....so when 13 is substracted from 27 the answer is 14. So the answer is option D.

The following species can be ranked in increasing ability as oxidizing agents:

1. H2O

2. O2

3. F2

In general, oxidizing agents are substances that have a tendency to accept electrons or donate oxygen atoms in a chemical reaction, leading to oxidation of the other reactant. The strength of oxidizing agents can be measured by their standard reduction potentials, which are a measure of the tendency of a species to accept electrons and undergo reduction.

H2O has a relatively low standard reduction potential, indicating that it has a low tendency to accept electrons and is a weak oxidizing agent. It is more commonly known as a reducing agent, as it donates electrons in many biological reactions.

O2 has a higher standard reduction potential than H2O, indicating that it has a greater tendency to accept electrons and is a stronger oxidizing agent. O2 is commonly used as an oxidizing agent in various chemical reactions, such as combustion.

F2 has the highest standard reduction potential among the three species, indicating that it is the strongest oxidizing agent. It readily accepts electrons and is a powerful oxidizing agent that is often used in chemical synthesis.

In summary, the ranking of H2O, O2, and F2 in increasing ability as oxidizing agents is based on their standard reduction potentials. While H2O is a weak oxidizing agent, O2 is a stronger oxidizing agent and F2 is the strongest oxidizing agent among the three.

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The valence states provided are general representations and may vary depending on specific conditions and coordination environments.

a. Uvarovite: The mineral formula for uvarovite is Ca3Cr2(SiO4)3. In this formula, the valence state of calcium (Ca) is +2, the valence state of chromium (Cr) is +3, and the valence state of silicon (Si) is +4. Oxygen (O) is usually assigned a valence state of -2.

b. Azurite: The mineral formula for azurite is Cu3(CO3)2(OH)2. In this formula, the valence state of copper (Cu) is +2, carbonate (CO3) has a valence state of -2, and hydroxide (OH) has a valence state of -1.

c. Cuprite: The mineral formula for cuprite is Cu2O. In this formula, the valence state of copper (Cu) is +1, and oxygen (O) is usually assigned a valence state of -2.

d. Gypsum: The mineral formula for gypsum is CaSO4·2H2O. In this formula, the valence state of calcium (Ca) is +2, sulfur (S) has a valence state of +6, and oxygen (O) is usually assigned a valence state of -2. The water molecules (H2O) do not have a net charge.

e. Galena: The mineral formula for galena is PbS. In this formula, the valence state of lead (Pb) is +2, and sulfur (S) has a valence state of -2.

It's important to note that the valence states provided are general representations and may vary depending on specific conditions and coordination environments.

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Atoms of an element that have different numbers of neutrons are called isotopes.

An isotope is a variation of a chemical element that varies in the number of neutrons present in its atomic nucleus. Isotopes have the same number of protons but differing numbers of neutrons. For instance, carbon-12, carbon-13, and carbon-14 are three isotopes of the element carbon, with different numbers of neutrons.

There are three isotopes of hydrogen, each with only one proton in the nucleus, but with 0, 1, or 2 neutrons. These isotopes of hydrogen are often referred to by their common names: protium, deuterium, and tritium, respectively.In summary, atoms of an element that have different numbers of neutrons are called isotopes.

Technetium-99 (Tc-99) is the most commonly used radioisotope for diagnosis, with approximately 40 million procedures performed annually. It accounts for approximately 80% of all nuclear medicine procedures and 85% of diagnostic scans performed worldwide in nuclear medicine.

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According to the octet rule, except for helium, the noble gases contain eight valence electrons.

Noble gases are any of a group of rare gases which include helium, neon, argon, krypton, xenon, and sometimes radon and which exhibit great stability and extremely low reaction rates.

Noble gases are almost completely because they have eight valence electrons. Noble gases are the least reactive of all known elements. That's because with eight valence electrons, their outer energy levels are full.

The octet rule states that atoms tend to form compounds in ways that give them eight valence electrons, and so the electron configuration of a noble gas. An exception to an octet of electrons is in the case of the first noble gas, helium, that only has two valence electrons.

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To make 700 mL of a 0.75M NaCl solution, the following steps should be taken:

Step 1: Calculate the molecular weight of NaCl.

The molecular weight of NaCl is the sum of the atomic weights of Na and Cl.

Molecular weight of NaCl = atomic weight of Na + atomic weight of Cl.

Molecular weight of NaCl = (22.99 + 35.45) g/mol = 58.44 g/mol

Step 2: Calculate the number of moles of NaCl required.

To calculate the number of moles, use the formula: Number of moles = desired Molarity x volume (in liters)

Number of moles = 0.75 M x 0.7 L (700 mL = 0.7 L) = 0.525 moles

Step 3: Calculate the mass of NaCl required.

To calculate the mass, use the formula: Mass = number of moles x molecular weight

Mass = 0.525 mol x 58.44 g/mol = 30.69 g

Step 4: Dissolve 30.69 g of NaCl in enough water to make 700 mL of solution.

Dissolve 30.69 g of NaCl in enough water to make 700 mL of solution.

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To make a 0.75M NaCl solution with a volume of 700ml, you would need to dissolve 30.57 grams of NaCl in enough water to make a total volume of 700ml.

To make a 0.75M NaCl solution with a volume of 700ml, we need to follow these steps:

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ANSWER

The final pressure of the gas is 155mmHg

EXPLANATION

Given that:

The initial pressure of the gas is 40mmHg

The initial temperature of the gas is 77K

The final temperature of the gas is 298K

To find the final pressure, follow the steps below

In the given data, the volume of the container is fixed. Hence, the process is an Isochoric.

Step1: Write the gas law at constant volume

Step 2: Substitute the given data into the formula in step 1 to find P2

Hence, the final pressure of the gas is 155mmHg

Answer:

size and shape because solids nomally have a fixed shape and volume

I think it would be, C. Size and Shape.

Because, when measuring objects in solids u should measure the Size because the color is just paint and the texture is just how it feels. The shape can be measured in solids too.

So, your answer is C.

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Answer:

d. Maderno’s plan

Explanation:

This is the final plan of the St. Peter’s Basilica, the plan of Carlo Maderno, who continued the plans of Michelangelo's plans by adding a nave and a narthex.

Bramante's plan was basically a square, roughly representing the top half of the image provided in the question.

It was modified by Michelangelo who added a section, then extended once more by Maderno who gave it this aspect.

The basilica was finished in 1626, 120 years after the construction began.

Answer:

circulatory system

Explanation:

Your circulatory system delivers oxygen-rich blood to your bones. Meanwhile, your bones are busy making new blood cells. Working together, these systems maintain internal stability and balance, otherwise known as homeostasis.