The bigger the magnitude , the bigger the Earthquake

Answer:

300.02°F

Explanation:

To convert 421.9.9 Kelvin to Celsius subtract 273 from 421.9 Kelvin

421.9-273=148.9°C

To convert 148.9°C to °F use the formula (°C x 9/5) +32

That is:

(148.9°C x 9/5) + 32

=300.02°C

The overall enthalpy of the reaction is -131.3 kJ.

To calculate the overall enthalpy of the reaction, you need to manipulate the given equations and combine them in a way that cancels out the common substances. Let's analyze each equation:

1: C (s) + O₂ (g) -> CO₂ (g)   ΔH₁ = -393.5 kJ

2: 2CO (g) + O₂ (g) -> 2CO₂ (g)   ΔH₂ = -566.0 kJ

3: 2H₂O (g) -> 2H₂ (g) + O₂ (g)   ΔH₃ = 483.6 kJ

To obtain the overall reaction: C (s) + H₂O (g) -> CO (g) + H₂(g), we can manipulate the equations as follows:

1: Reverse equation 1 to obtain: CO₂ (g) -> C (s) + O₂ (g)   ΔH₁' = +393.5 kJ

2: Halve equation 2 to obtain: CO (g) + 1/2 O₂ (g) -> CO₂ (g)   ΔH₂' = -283.0 kJ

3: Reverse and halve equation 3 to obtain: H₂ (g) + 1/2 O₂ (g) -> H₂O (g)   ΔH₃' = -241.8 kJ

Now, we can sum up the manipulated equations to obtain the overall reaction:

CO₂ (g) + CO (g) + H₂ (g) + 1/2 O₂ (g) -> C (s) + 2CO₂ (g) + H₂O (g) + 1/2 O₂ (g)

To calculate the overall enthalpy change (ΔHrxn), we sum up the enthalpy changes of the manipulated equations:

ΔHrxn = ΔH₁' + ΔH₂' + ΔH₃'

      = 393.5 kJ + (-283.0 kJ) + (-241.8 kJ)

      = -131.3 kJ

Therefore, the overall enthalpy of the reaction is -131.3 kJ.

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The axodendritic synapses are rare and always terminate on dendrites.
Axodendritic synapses are a type of synapse in which the axon of one neuron forms a synapse with the dendrite of another neuron. This type of synapse is important for neuronal communication and signal transmission in the nervous system.

Out of the given options, option a) states that axodendritic synapses are rare, which is true. This means that they are not commonly found in the nervous system.

Option c) states that axodendritic synapses always terminate on dendrites, which is also true. Dendrites are the receiving end of a neuron, and the axon terminals form synapses with dendritic spines to transmit signals to the next neuron.

Therefore, the correct answer is a and c, which means that axodendritic synapses are rare and always terminate on dendrites.

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Answer: stepper mother is good for that

Explanation:

Answer:

Condensation

Explanation:

The cold temperature around the tumbler cools down the water particles in the air around it. The particles condense and turn into water on the outside of the tumbler.

These are structural formulas of constitutional isomers of hexene, an alkene.

Both are acyclic, six-carbon chains, and they differ only in the position of the double bond. As constitutional isomers, both structures have the same molecular formula.

The first structure is of hex-1-ene (or 1-hexene).

The second structure is of (3E)-hex-3-ene [or (3E)-3-hexene].

Both structures have the molecular formula C₆H₁₂.

I hope I answered your question. Please feel free to let me know otherwise.

Answer:

57

Explanation:

a mass number is protons plus neutrons so we add them

30+27

57

Hopes this helps please mark brainliest

Answer:

57

Explanation:

the other guy is right

Secondary consumers are organisms that primarily feed on herbivores or other primary consumers.

They occupy the next trophic level above the primary consumers in a food web. They obtain energy by consuming the primary consumers and play an important role in regulating the population of herbivores.

Examples of commonly observed secondary consumers include:

Carnivorous mammals: Animals such as wolves, lions, and tigers that feed on herbivores like deer, zebras, or gazelles.

Birds of prey: Species like eagles, hawks, and owls that consume small mammals, reptiles, or other birds.

Carnivorous fish: Fish like pike, barracuda, or bass that prey on smaller fish or aquatic invertebrates.

Predatory insects: Insects such as spiders, mantises, or dragonflies that feed on other insects, including herbivorous insects.

In a specific food web, the identification of secondary consumers would depend on the specific organisms present and their feeding interactions. It would be necessary to analyze the trophic relationships among the organisms in the food web to determine the secondary consumers accurately.

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The balanced equation for the reaction of iron with water that results in the production of iron oxide and hydrogen gas is

3 Fe (s) + 4H₂O (g) → Fe₃O₄ (s) + 4H₂ (g)

Iron does not react directly with liquid water but react with water vapour. When the reaction happens, it results in the formation of a solid and a gas. The products of the reaction are Iron oxide and hydrogen. The equation of the reaction would be

Fe (s) + H₂O (g) → Fe₃O₄ (s) + H₂ (g)

Now, we need to balance the equation. On the right-hand side, we have 3 Fe, 4 O and 2 H. Similarly on the left-hand side there are 1 Fe, 1 O and 2 H.

To balance the equation, we add 3 to Fe, 4 to H₂0 and 4 to H₂.

As a result, the balanced chemical equation for the reaction would be

3 Fe (s) + 4H₂O (g) → Fe₃O₄ (s) + 4H₂ (g)

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To determine the number of moles of B present at 10 s, we need to use the stoichiometry of the reaction. From the balanced equation, we know that 1 mole of A reacts to form 1 mole of B.

At the beginning of the reaction (t=0 s), we have 0.124 mol of A. At 10 s, the amount of A that has reacted is the difference between the initial amount and the amount at 10 s:

0.124 mol - 0.110 mol = 0.014 mol of A has reacted.

Since the reaction is 1:1, this means that 0.014 mol of B has been formed. Therefore, at 10 s, there are 0.014 mol of B present in the flask.

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Answer:

The atomic number will remain the same because a proton has a positive charge and a electron has a negative charge so they would cancel each other out

Substance C is a solid solute because the solubility of a solid increases with increasing temperature. Therefore, option B is correct.

Solubility refers to the ability of a solute to dissolve in a solvent and form a homogeneous mixture called a solution. It is a measure of how much of a solute can dissolve in a given amount of solvent under specific conditions, such as temperature and pressure.

Solubility is typically expressed as the maximum amount of solute that can dissolve in a specified amount of solvent. The solubility of a substance is influenced by various factors, including the nature of the solute and solvent, temperature, pressure, and the presence of other substances.

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Answer: it's substance A hope it helps.!

According to the electronic configuration, Li,C, F belong to same period as they have 2 shells .Among F,S, P it is neither same period or group and for O,S,Se they belong to the same group as they have 6 valence electrons.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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The results of a scientific investigation would be considered reliable only if all aspects of the investigation have been carefully planned and executed.

A scientific investigation is a process that is used to answer questions or solve problems about the natural world using the scientific method. The scientific method is a systematic approach that involves formulating a hypothesis, designing an experiment, collecting and analyzing data, and drawing conclusions based on the results.The reliability of the results of a scientific investigation depends on several factors. First, the experiment must be carefully planned to ensure that it is well-designed and that all variables are controlled. This means that the experiment should be designed to test a specific hypothesis and that all variables that might affect the results of the experiment should be controlled or eliminated.Second, the experiment must be executed carefully to ensure that all procedures are followed correctly and that all data is collected accurately. This means that the experiment should be conducted in a controlled environment and that all data should be recorded and analyzed accurately.Finally, the results of the experiment must be analyzed carefully to ensure that they are reliable and valid. This means that the data should be analyzed using appropriate statistical methods to determine whether the results are statistically significant and that any conclusions drawn from the data are based on sound reasoning and logic.In conclusion, the results of a scientific investigation would be considered reliable only if all aspects of the investigation have been carefully planned and executed.

This means that the experiment must be well-designed, carefully executed, and analyzed using appropriate statistical methods to ensure that the results are reliable and valid.

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Answer:

Yes. It is definitely correct

Answer:

There is 30.74% of carbon in dimethylsulfoxide

Answer:

Kb = 3.64x10⁻⁵

Explanation:

First we calculate the pOH of the solution:

Then we calculate [OH⁻]:

For a weak base solution with a relatively high concentration, we can use the following formula:

Where C is the concentration of the weak base solution (1.2 M in this case).

With the formula above we can calculate Kb:

Answer:

There is 5.56 g of gold for every 1 g of chlorine

Explanation:

The question is to determine the simplest mass ratio of gold to Chlorine in the compound.

Since the mass of gold in the compound compared to chlorine is 15.39 g for every 2.77 g, the mass of gold per gram of chlorine is given as:

15.39 / 2.77 = 5.56 g of gold to two decimal places

Therefore, for every 5.56 g of gold, there is 1 g of chlorine.

Note : The ratio in which different elements combine by mass to form a compound is given by the law of constant composition which states that, "all pure samples of a particular chemical compound contain the same elements combined in the same proportion by mass.

Answer:

Physicians do not have to treat every ill patient. However they must uphold their ethics (eg. do no harm, confidentiatlity, etc.).

Explanation:

Primary source:

Hippocratic Oath (translation since it's originally in Greek)

I swear by Apollo the physician, and Asclepius, and Hygieia and Panacea and all the gods and goddesses as my witnesses, that, according to my ability and judgement, I will keep this Oath and this contract:

To hold him who taught me this art equally dear to me as my parents, to be a partner in life with him, and to fulfill his needs when required; to look upon his offspring as equals to my own siblings, and to teach them this art, if they shall wish to learn it, without fee or contract; and that by the set rules, lectures, and every other mode of instruction, I will impart a knowledge of the art to my own sons, and those of my teachers, and to students bound by this contract and having sworn this Oath to the law of medicine, but to no others.

I will use those dietary regimens which will benefit my patients according to my greatest ability and judgement, and I will do no harm or injustice to them.

I will not give a lethal drug to anyone if I am asked, nor will I advise such a plan; and similarly I will not give a woman a pessary to cause an abortion.

In purity and according to divine law will I carry out my life and my art.

I will not use the knife, even upon those suffering from stones, but I will leave this to those who are trained in this craft.

Into whatever homes I go, I will enter them for the benefit of the sick, avoiding any voluntary act of impropriety or corruption, including the seduction of women or men, whether they are free men or slaves.

Whatever I see or hear in the lives of my patients, whether in connection with my professional practice or not, which ought not to be spoken of outside, I will keep secret, as considering all such things to be private.

So long as I maintain this Oath faithfully and without corruption, may it be granted to me to partake of life fully and the practice of my art, gaining the respect of all men for all time. However, should I transgress this Oath and violate it, may the opposite be my fate.

The correct option c. nonmetals. Nonmetals make up the majority of the elements of groups 16 through 18.

The position of an element on this periodic table has a significant impact on how that element is defined.

Elements of groups 16 through 18:

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The chemical formula of the gas is Xe

Molar mass of H2 (M₂) = 2 g/mol

Rate of diffusion of H2 (r₂) = ?

Rate of diffusion of X (r₁) = 0.124r₂

molar mass of X (M₁) = ?

To calculate the molar mass of X we use graham's law of diffusion

     \(\frac{r1}{r2} = \sqrt{\frac{M2}{M1} }\)

    \(\frac{0.124r2}{r2} = \sqrt{\frac{2}{M1} }\)

    \({0.124} = \sqrt{\frac{2}{M1} }\)

    0.015 = 2 / M₁

    M₁ = 2 / 0.015

    M₁ = 133.3

133 is near 131.293 g/mol, which is the molar mass of xenon (Xe)

Therefore the chemical formula of the gas HX is Xe.

Complete question:

A gas made up of atoms escapes through a pinhole 0.124 times as fast as H2 gas. write the chemical formula of the gas.

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Answer: Steel wool turns from a gray color to a reddish color after it gets wet and then sits on a counter is a sign of chemical change.

Explanation:

A change that brings change in chemical composition of a substance is called a chemical change.

For example, Steel wool turns from a gray color to a reddish color after it gets wet and then sits on a counter is a chemical change.

This is because steel wool is mostly made up of iron and when iron becomes wet then in the presence of air it gets oxidized and therefore, it gets corroded.

This corrosion appears as reddish color of steel wool and it represents a chemical change has occurred in the steel wool.

Thus, we can conclude that steel wool turns from a gray color to a reddish color after it gets wet and then sits on a counter is a sign of chemical change.

The equilibrium concentration of phosphate ions in pure water caused by the dissociation of Ca₃(PO₄)₂(s) is 1.63 × 10⁻⁶ mol/L or 0.156 mg/L.

The equilibrium constant expression for the dissociation of Ca₃(PO₄)₂(s) is given by;

Ksp = [Ca²⁺]³[PO₄³⁻]²

We can use this expression to find the equilibrium concentration of PO₄³⁻ in pure water. Since we are starting with solid Ca₃(PO₄)₂, we can assume that the initial concentration of Ca²⁺ and PO₄³⁻ is zero. At equilibrium, let x be the concentration of PO₄³⁻. Then, the concentration of Ca²⁺ will be 3x (due to the stoichiometry of the reaction).

Substituting these values into the Ksp expression and solving for x, we get;

Ksp = (3x)³(x)² = 2.07 × 10⁻²⁶

Simplifying this expression, we get;

27x⁵ = 2.07 × 10⁻²⁶

x⁵ = 7.67 × 10⁻²⁸

Taking the fifth root of both sides, we get:

x = 1.63 × 10⁻⁶ mol/L

To convert this to mg/L, we can use the molar mass of PO₄³⁻, which is 95.97 g/mol;

1.63 × 10⁻⁶ mol/L × 95.97 g/mol = 0.156 mg/L

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Answer:

The answer is 1.834 * 10

Explanation:

Answer:

The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.

Explanation:

As molecules heat they begin to move faster. The heat from the metal plate will make the molecules at room temperature move faster. And the room temperature makes the hot place cool, making the hot plate molecules slow down.

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https://phet.colorado.edu/en/simulations/gas-properties

click the play button to activate the activity

They both contain hydride (H-) ions which act as the reducing agent in the reaction.

Sodium borohydride and lithium aluminum hydride are both reducing agents that are commonly used in chemical reactions to reduce or transform organic compounds. Additionally, they are both highly reactive and can cause explosive reactions if not handled properly. They have in common their ability to donate hydride ions (H-) for the reduction of various functional groups, such as carbonyls and nitriles, in organic chemistry reactions. This makes them essential tools in many synthesis and reduction processes.

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