Question 9 of 18SubmitWhat is the specific heat of a 54.51 g piece of anunknown metal that exhibits a 45.2°C temperature changeupon absorbing 1870 J of heat?

The reaction rate to the nearest whole number is 36.1 mg/l/sec.

To calculate the reaction rate we would use the formula already provided which is: mass of tablet/volume of water ÷ Reaction time.

For the tablet with a 3°C Reaction time, we would calculate the rate as follows:

1000 mg * 0.2L/138.5 sec = 36.1 mg/L/sec.

The final result has all three variables and the resulting answer is the reaction rate.

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Complete Question:

Assume that each tablet's mass was 1,000 mg, and remember that you used 0,200 L of water each time,

Compute the reaction rate to the nearest whole number using the formula below,

mass of tablet/volume of water

Reaction Rate = mass reaction time

3°C Reaction time = 138.5 sec

Reaction rate = mg/l/sec

The basic units of the human body are called cells, and they carry out specialized tasks to keep the body alive. Cells in a city might be compared to people who perform particular duties and contribute to the general efficiency of the city.

Organizational hierarchy is built up from lower levels. Consequently, molecules combine to create molecules, molecules create cells, cells create tissues, tissues create organs, organs create organ systems, and organ systems create beings. The body's next level of organisation. A tissue is made up of related cells with a common purpose. Human tissues can be divided into four categories: epithelial, muscular, nerve, and connective.

The major levels of organisation in the body, from the most basic to the most complex, are atoms, molecules, organelles, cells, tissues, organs, organ systems, and the human body.

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The graph indicates that the concentration is inverserly proportional to time. That is, as the concentration decreases, the trail time increases. This can be observed with trial 1 having a longer time than trial 4.

The type of movement that occurs in the plate movement listed above include the following:

These are gigantic pieces of the Earth's crust and uppermost mantle and are made up of oceanic crust and continental crust.

A convergent boundary as the name implies occurs when lithospheric plates are moving towards one another.

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The heat produced by 4.5 moles of magnesium when burnt is 2700 kJ.

A thermochemical reaction is a reaction in which the amount of heat lost or gained is included in the reaction equation. The thermochemical reaction equation for the combustion of magnesium is shown as follows;

2 Mg(s) + O2(g) → 2 MgO(s) + 1200 kJ

From the reaction equation;

2 moles of magnesium produced 1200 kJ of heat

4.5 moles of magnesium will produce 4.5 moles × 1200 kJ/2 moles

= 2700 kJ

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According to the description of an ionic bond, the last choice is the right response: Ca and Br are the two components that will combine to form an ionic connection. Bromine gets electrons quickly whereas calcium loses them easily.

Between metallic and non-metallic atoms, an ionic bond is created in which all of the electrons from one atom are transferred to the other. One atom loses electrons and another receives them during this process, resulting in the formation of ions.

In general, nonmetals are willing to take electrons to form anions while metal elements are willing to donate them to make cations.

On the other hand, the octet rule describes an attribute of atoms that they require eight electrons to complete their final energy level in order to ensure stability. The noble gases that have served as the foundation for this rule.

In order to adhere to the octet rule and ensure that the elements are stable, electrons are transferred in the ionic connection in this manner.

Ca and Br are the two elements that will combine to form an ionic connection because Ca is a metal and will give electrons while Br is a non-metal and will accept them.

The final option, Ca and Br, is the pair of elements that will form an ionic bond, making it the correct response. Bromine gets electrons quickly whereas calcium loses them easily.

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You need to know the amount of heat generated by the combustion reaction.

Assuming propane as fuel, you can use thiis data:

C3H8(g)+5O2(g)---3CO2(g)+4H2O(g) ΔH= -2217 KJ

So when 3 moles of CO2 is emmitted 2217 kJ of heat is produced.

The molar wegiht of CO2 is 12 g/mol + 2 * 16 g/mol = 44 g/mol.

Then 3 mol * 44 g / mol = 132 g of CO2 are produced with 2217 kJ of heat.

Now you have to calculate how much energy you need to produce if only 12% is abosrbed by the pork

Energy absorbed by the pork = 12% *  total energy =>

total energy = energy absorbed by the pork / 0.12 = 1700 kJ / 0.12 = 14,166.67 kJ.

Now, state the proportion:

132 g CO2 / 2217 kJ = x / 14,166.7 kJ =>

x = 14,166.67 * 132 / 2217 = 843.48 g CO2.

Answer: 843 g of CO2

An element is a substance that cannot be broken down by chemical means. Elements are extremely particular compounds that serve as the foundation for all life and matter (well other than the stuff smaller than atoms). It can contain one atom or trillions of them for anything to be an element, however atoms of different types cannot be combined in. That is to say, every atom has a set number of protons, ranging from 1 to 118. You can be positive that the substance you have is hydrogen if there is just one proton present. Mercury is what you get if you have 80 protons. Atoms of pure hydrogen only contain one proton. As most people are aware, if you add oxygen to it, it turns into water, which is no longer an element but a compound. Nevertheless, the building blocks are the elements. Every single object you can see is composed of elements, whether there are many of them, as there are in the human body, or only a few, as there are in salt.

A compound is a substance with a definite composition (with some leeway there, there are 'non-stoichiometric' compounds), that is composed of 2 or more elements.

Further explanation:

A compound in chemistry is a material that is created by mixing two or more distinct chemical elements in such a way that the atoms of the various elements are kept together by strong chemical bonds. These bonds form as a result of the sharing or exchange of electron s among the atoms. A molecule is the smallest, unbreakable unit of a substance.

A mixture is not a compound since there is no bonding between the atoms of the constituent substances in a mixture. In certain cases, mixing dissimilar elements causes chemical reactions that result in the formation of bonds between the atoms and the molecules of a compound. Other possibilities allow mixing distinct components without causing a reaction, preserving the separate identities of the elements. When elements are combined, reactions can happen quickly or slowly (for example, when iron is exposed to oxygen) (as when lithium is exposed to oxygen). There are times when an element is introduced to a chemical, a reaction takes place, creating new compounds (as when pure elemental sodium is immersed in liquid water).

A compound frequently looks and acts quite different from any of the constituent parts. Think about hydrogen (H) and oxygen, for instance (O). At standard atmospheric pressure and room temperature, both of these substances are gases. However, they combine to form the well-known material known as water, which is a liquid at room temperature and at normal atmospheric pressure and whose molecules each contain two hydrogen atoms and one oxygen atom (H2O).

Few elements' atoms readily combine with those of other elements to produce compounds. These gases—helium, neon, argon, krypton, xenon, and radon—are referred to as noble or inert gases. Compounds made of certain elements can be formed easily with other elements. Examples include fluorine, chlorine, and oxygen.

2) The adjective compound refers to something that is made up of several different components. Examples of this usage include compound eyes, which are found in a variety of insects, compound microscopes, which are high-power magnifying devices made up of multiple lenses, compound sentences, which are organized collections of smaller sentences that form a single integrated perceptual environment, and compound documents.

Answer:

53.7 L

Explanation:

The volume occupied by 35.2 g of methane gas at 25 °C and 1.0 atm. is 55.9 L.

Given to us is temperature, pressure, universal gas constant, and mass of methane gas, we need to find the volume occupied by the gas.

To calculate the volume occupied by the methane gas, we can use the ideal gas law equation:

PV = nRT

Where:

P = pressure (in atm)

V = volume (in liters)

n = number of moles

R = ideal gas constant (0.08206 Latm/(Kmol))

T = temperature (in Kelvin)

First, we need to convert the given temperature from Celsius to Kelvin:

T(K) = T(°C) + 273.15

T(K) = 25 °C + 273.15

T(K) = 298.15 K

Next, we calculate the number of moles of methane gas using its molar mass:

molar mass of CH₄ = 12.01 g/mol + 4(1.008 g/mol) = 16.04 g/mol

n = mass/molar mass

n = 35.2 g / 16.04 g/mol

n = 2.19 mol

Now we can substitute the values into the ideal gas law equation:

PV = nRT

V = (nRT) / P

V = (2.19 mol × 0.08206 Latm/(Kmol) ×298.15 K) / 1.0 atm

V = 55.9 L

Therefore, the volume occupied by 35.2 g of methane gas at 25 °C and 1.0 atm is 55.9 liters.

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Order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing.

Answer:

The energy required to heat 1.30 kg of water from 22.4°C to 34.2°C is 64,121.2 J

Explanation:

Calorimetry is the measurement of the amount of heat that a body gives up or absorbs in the course of a physical or chemical process.

The sensible heat of a body is the amount of heat received or transferred by a body when undergoing a temperature variation (Δt) without there being a change in physical state. That is, when a system absorbs (or gives up) a certain amount of heat, it may happen that it experiences a change in its temperature, involving sensible heat. Then, the equation for calculating heat exchanges is:

Q = c * m * ΔT

Where Q is the heat or quantity of energy exchanged by a body of mass m, constituted by a substance of specific heat c and where ΔT is the variation in temperature (ΔT=Tfinal - Tinitial).

In this case:

Replacing:

\(Q=4.18 \frac{J}{g*K}*1,300 g*11.8 K\)

Q= 64,121.2 J

The energy required to heat 1.30 kg of water from 22.4°C to 34.2°C is 64,121.2 J

A blood test determines that Megumi’s magnesium reading is not right considering her symptoms then the Megumi has a magnesium deficiency

Magnesium deficiency is the condition in which blood level of magnesium is lower than usual and hypomagnesemia is the medical term for this disorder and magnesium shortage is an electrolyte disruption caused by a low magnesium content in the body and it can cause a variety of symptoms and the symptoms are palpitations, poor coordination, muscular spasms, lack of appetite, personality changes and because of low magnesium level the potassium level is also deceases

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(A) \(2Al(s) + 3O2(g) -- > Al2O3(s)\),  (B) \(Ca + SO4 -- > CaSO4\),

(C) \(2Mg + Br2 -- > 2MgBr2\) are reactions that occur that would form \(Al2O3\), \(CaSO4\), and \(MgBr2\) as resultant ionic compounds.

Al2O3 is obtained as the empirical formula if we combine two Al3+ ions and three O2- ions, using subscripts to show the number of each ion in the formula. An ionic compound is aluminum oxide. It has two aluminum atoms for every three oxygen atoms, according to this definition. It is a result of the reaction between oxygen and aluminum. Calcium ion and sulphate ion combine to generate the chemical known as calcium sulphate. Sulfate and calcium ions each have two positive charges (Ca2+) and two negative charges (SO42), and they combine to create the neutral molecule CaSO4. Bromine and magnesium are combined to form magnesium bromide. Magnesium bromide has the chemical formula MgBr2.

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Answer:

C

Explanation:

This is because The polar group consist of 10 amino acids, two are negatively charged that is aspartic acid and glutamic acid, 3 have a positive charge - arginine, lysine and histidine, and 5 are uncharged

Answer:

A

Explanation:

Answer:

b

Explanation:

Answer: graduated cylinder: 4.25

Explanation:

Answer:

just downloud smart

Explanation:

thank me later

Answer:

The correct answer is option C, that is, 1.36 L.

Explanation:

The reaction mentioned in the question is:  

Zn (s) + 2HCl (aq) ⇒ H2 (g) + ZnCl2 (aq)

It is clear that one mole of zinc is generating one mole of hydrogen gas as seen in the reaction. The mass of zinc mentioned in the question is 3.566 grams, the no of moles can be determined by using the formula,  

n = mass / molecular mass

The molecular mass of zinc is 65.39 g/mol, now putting the values in the formula we get,  

n = 3.566 g/ 65.39 g/mol

= 0.0545 mol

Based on the question, the partial pressure of water vapor is 18.65 mmHg and the atmospheric pressure is 752 mmHg. Therefore, the pressure of hydrogen gas will be,  

Pressure of hydrogen gas (H2) = 752 mmHg - 18.65 mmHg

= 733.35 mmHg

The liters of hydrogen gas produced can be calculated by using the equation, PV =nRT

R is the gas constant, having the value 62.36 L mmHg/K/mol and T is the temperature (273 + 21 = 294 K).  

Now putting the values in the equation we get,  

733.35 mmHg * V = 0.0545 mol * 62.36 mmHg/K/mol * 294 K

= 999.19 L / 733.35

= 1.36 L

Hence, the volume of hydrogen gas is 1.36 L.  

Approximately 63.5% of the compound AgNO3 is made of silver.

The atomic mass of silver (Ag) is 107.87 g/mol, and the atomic mass of nitrogen (N) is 14.01 g/mol, and the atomic mass of oxygen (O) is 16.00 g/mol.

The molecular weight of AgNO3 is:

AgNO3 = (Ag atomic mass) + (N atomic mass) + (3 x O atomic mass)

AgNO3 = (107.87 g/mol) + (14.01 g/mol) + (3 x 16.00 g/mol)

AgNO3 = 169.87 g/mol

The percent by mass of silver in AgNO3 can be calculated as:

Percent by mass of silver = (Mass of silver / Total mass of AgNO3) x 100

Since there is only one silver atom in one AgNO3 molecule, the mass of silver in one mole of AgNO3 is equal to the atomic mass of silver, which is 107.87 g/mol.

Therefore, the percent by mass of silver in AgNO3 is:

Percent by mass of silver = (107.87 g/mol / 169.87 g/mol) x 100

Percent by mass of silver = 63.5%

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The maximum mass of hydrogen sulfide that can form is 17.01 g.

What is Limiting Reagent?

A limiting reagent, also known as a limiting reactant, is the substance that is completely used up in a chemical reaction and limits the amount of product that can be formed. It is the reactant that is present in the smallest stoichiometric amount and, as a result, determines the theoretical yield of the reaction. The other reactants may be present in excess and may not be completely used up.

To determine which reactant is the limiting reagent, we need to calculate the amount of product that each reactant would produce and see which one produces less.

The balanced chemical equation for the reaction between aluminum sulfide and water is:

First, we need to calculate the amount of moles of each reactant:

moles of Al2S3 = mass ÷ molar mass = 25.00 g ÷ 150.16 g/mol = 0.1664 mol

moles of H2O = mass ÷ molar mass = 50.00 g ÷ 18.02 g/mol = 2.776 mol

Next, we need to determine the limiting reagent. From the balanced equation, we can see that one mole of Al2S3 reacts with 6 moles of H2O. Therefore, the amount of H2O required to react with 0.1664 mol of Al2S3 is:

0.1664 mol Al2S3 × 6 mol H2O/mol Al2S3 = 0.9984 mol H2O

Since we have 2.776 mol of H2O available, we have more than enough water to react with the 0.1664 mol of Al2S3. This means that aluminum sulfide is the limiting reagent.

To calculate the maximum mass of hydrogen sulfide that can form, we need to use the amount of moles of Al2S3 as the basis of our calculation. From the balanced equation, we know that 1 mole of Al2S3 produces 3 moles of H2S. Therefore:

moles of H2S = moles of Al2S3 × 3 mol H2S/mol Al2S3 = 0.1664 mol × 3 mol H2S/mol Al2S3 = 0.4992 mol H2S

Finally, we can calculate the mass of hydrogen sulfide produced using its molar mass:

mass of H2S = moles of H2S × molar mass = 0.4992 mol × 34.08 g/mol = 17.01 g

Therefore, the maximum mass of hydrogen sulfide that can form is 17.01 g.

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An error during DNA replication would create a gene mutation.

During DNA replication, the genetic information in a cell is copied to make new DNA molecules. However, mistakes can occur during this process, leading to changes in the DNA sequence, which can result in a mutation. Mutations can also be caused by exposure to environmental factors, such as radiation or chemicals, which can damage the DNA molecule directly or affect the cellular processes involved in DNA replication.

Mutations can have a variety of effects on the organism, ranging from no effect to causing serious health problems or even death. Gene mutations can also be inherited from a parent, which can result in genetic disorders or predisposition to certain diseases. Therefore, it is important to understand the mechanisms of gene mutations and their potential impacts on organisms.

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The removal of hydrogen or any other electropositive element, or the addition of oxygen, is said to be the process of oxidation in classical or earlier concepts. An atom or ion gains one or more electrons during the process of reduction.

1. The oxidation half-reaction of copper is:

Cu  → Cu²⁺ + 2e⁻

The reduction half is:

Cu²⁺ + 2e⁻ → Cu

3. An anode in electrochemistry is, in its simplest form, the site of an oxidation reaction. Due to the anode's electrical potential, negative ions or anions usually react there and release electrons. After that, these electrons ascend and enter the drive circuit.

In chemistry, the cathode is referred to as the electrode where reduction takes place. In an electrochemical cell, this is typical. Here, the cathode is negative because the cell's electrical energy supply causes chemical molecules to break down.

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Answer:

It loses electrons.

Explanation:

When an atom is oxidized in a redox reaction, it simply loses electrons and the oxidation number increases.

An oxidized atom implies that oxidation has occurred; oxidation can be defined as:

D. It loses electrons

Here's how it works!

Oxidation occurs when an atom, molecule, or ion loses one or more electrons. In the process of oxidation, the oxidation state of the chemical species increases. Originally, the term was used to describe when oxygen caused electron loss in reactions. I hope that helps you!

Answer:

separating solute particles in the pure solute and separating solvent particles in pure solvent

Explanation:

when we talk about a solution, it means the homogeneous mixture of different substances of two or more.

Enthalpy change of solution is the quantity of heat that is released during the process of dissolving.

If solute molecules have been broken from the intermolecular forces that bind them and also solvent molecules have been broken from the intermolecular forces binding them, then we have an endothermic process.

so the answer is:

separating solute particles in the pure solute and separating solvent particles in pure solvent

The mass of hexane, C₆H₁₄ that would be needed to produce 562 grams of carbon dioxide, CO2 is 183 g

We'll begin by writing the balanced equation for the reaction.

2C₆H₁₄ + 19O₂ → 12CO₂ + 14H₂O

From the balanced equation above,

528 g CO₂ were produced from 172 g of C₆H₁₄

With the above information, we shall determine the mass of hexane, C₆H₁₄ needed to produce 562 g CO₂. Details below:

From the balanced equation above,

528 g CO₂ were produced from 172 g of C₆H₁₄

Therefore,

562 g of CO₂ will react to produce = (562 × 172) / 528 = 183 g of C₆H₁₄

Thus, the mass of hexane, C₆H₁₄ needed is 183 g

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According to the claim, Balloon A, which has more blue and less orange, exhibits accurate effusion at a relative effusion rate of 1.303. (orange is 1.303 times more effused than blue).Relative rate of effusion for the orange to blue spheres = 1.531.

The process of effusion is when a gas escapes from a container through a hole that is significantly smaller in diameter than the molecules' mean free path.

Gas molecules flow through a small opening in one container and into another by effusion. Graham's law allows rates of effusion to be compared at the same temperature. Diffusion is the random molecular motion-based movement of gas molecules through one or more other types of gas.

Rate of effusion of Orange / Rate of effusion of blue

= [Mblue / Morange]^1/2

Vrms = sqrt [(3RT/M)]

Vorange / Vblue = [ Mblue / Morange]^1/2

Rate of effusion of Orange / Rate of effusion of blue

= 565/ 369

= 1.531

Thus,  Balloon A, which has more blue and less orange, exhibits accurate effusion at a relative effusion rate of 1.303.

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Explanation:

The reaction must be written, completed, and balanced.

HCl => H2 + Cl2

To balance this, it is needed to have the same atoms and the same number of atoms on both sides of the reaction.

On the right, there are 2 hydrogens and 2 chlorines.

On the left, there is one per each.

Therefore, to balance this: add only a two next to HCl

2 HCl => H2 + Cl2

Type of reaction: a decomposition reaction.

Answer:

2 HCl => H2 + Cl2

Reaction Decomposition

Le Chatelier's guideline can be utilized to support development of an ideal item in compound responses. If you lower the temperature, this will benefit to increase the production of NH₃.

Ammonia gas is created when nitrogen gas and hydrogen gas combine in the reaction N₂ +3H₂  ⇄   2NH₃ in the Haber process for industrial synthesis; The process is exothermic, or it produces heat.

In the chemical reaction , N₂ +3H₂  ⇄   2NH₃ + Heat  (the creation of ammonia ) is exothermic.

If you lower the temperature, this will benefit, according to Le Chatelier's Principle., A reaction will proceed very slowly at a very low temperature, rendering it ineffective. As a result, the equilibrium mixture contains a high proportion of ammonia at temperatures between 400 and 450°C.

                                       N₂ +3H₂  ⇄   2NH₃ + Heat

The left side of the equation has four molecules, while the right side only has two. As indicated by Le Chatelier's Rule, the framework will answer by inclining toward the response which produces less atoms. The pressure will again drop as a result of that. As a result, consumers will react more favorably.

- The temperature, so that the equilibrium mixture can produce the most ammonia possible.

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