a first-order reaction has a rate constant of 0.547 min-1. how long will it take a reactant concentration 0.14 m to decrease to 0.07 m?

Answer:

\(d)cellulose \\ monomer \: is \: glucose \\ thank \: you\)

Answer:

cellulose

Explanation:

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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Given data

Patient's mass in lb = 169 lb

Dosage = 5 mg/kg

1 lb = 453.6 g

Chemistry -> Measurements -> Mass and weight

When the doctor prescribes a medication at a dosage of 5 mg/kg, the amount of medication the patient is going to ingest depends on their weight. If the patient's weight were 1 kg, for example, he or she would take 5 mg of that medication.

Based on this logic, we first have to convert the patient's weight from pounds to kilograms, knowing 1 kg is the same as 1000 grams.

Let's use the following conversion factor:

Since the patient weighs 76.66 kg, the next step multiplying by the dosage, like the following:

Final answer:

The patient should take 383.3 mg of the medication prescribed.

The concentration of HCl contained in the final solution is 0.95 M.

Here, we use the dilution formula, which is,

M (V₁ + V₂) = M₁V₁ + M₂V₂

where,

M = resultant concentration

M₁ = concentration of HCl

V₁ = volume of HCl

M₂ = concentration of NaOH

V₂ = volume of NaOH

Given,

M₁ = 1 M

V₁ = 90 cm³ = 90 mL

M₂ = 0.5 M

V₂ = 10 cm³ = 10 mL

To find,

M =?

Put the values in the above formula,

M (V₁ + V₂) = M₁V₁ + M₂V₂

M (90 + 10) = (1 × 90) + (0.5 × 10)

M × 100 = 90 + 5

M × 100 = 95

M = 95/100

M = 0.95 M

Therefore, the concentration of HCl contained in the final solution is 0.95 M.

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Converting the volumes to litres is not necessary. Any volume measurement is acceptable as long as it is utilized consistently on both sides.

The following formula can be used to create a specific volume of a diluted solution from a stock solution. Where: V1 = Volume of stock solution required to make the new solution, C1V1 = C2V2. C1 is the stock solution's concentration. V2 is the new solution's final volume.

However, as was already said, you need to know the volume in litres if you're trying to figure out how many moles of solute are present.

Data retrieved from the query include the following:

C1 = 2.46 M

V1 =?

C2 = 0.758 M

V2 = 275 mL = 275/1000 = 0.275L

We can definitely determine the volume of the initial solution using the dilution formula C1V1 = C2V2.

C1V1 = C2V2

2.46 x V1 = 0.758 x 0.275

Divide both side by 2.46

V1 = (0.758 x 0.275) /2.46

V1 = 0.0847L

Therefore, 0.0847L volume of a 2.46 Magnesium nitrate (Mg(NO3)2)

solution would be needed to make 275 mL of a 0.758 M solution by

dilution

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A symbol of magnesium, Mg, with two dots representing two free electrons. The correct option is D.

Magnesium is represented by Mg.

Magnesium has an atomic number of 12. Thus the electron configuration will be 2,8,2.

This means that there are two valence electrons in every Mg atom.

Therefore, the electron do diagram would be the symbol of the element with two dots representing the two valence electrons.

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Answer:

Two dotted M

Explanation:

Answer:

https://uach.mx/articulo/2017/10/20/biomateriales-como-implantes-en-el-cuerpo-humano/

Explanation:

utilizar este sitio web

Sure, here are the predictions for the entropy changes for each of the given reactions at 298 K:

1. 4Fe(s) + 3O2(g) → 2Fe2O3(s): The reaction involves the formation of a solid from its constituent elements, which usually leads to a decrease in entropy. Also, the number of moles of products is less than that of reactants, which further indicates a decrease in entropy. Therefore, the entropy change is likely negative.

2. O(g) + O(g) → O2(g): Here, two oxygen atoms combine to form a diatomic molecule, which has higher entropy due to increased molecular motion and randomness. Hence, the entropy change is likely positive.

3. NH3Cl(s) → NH3(g) + HCl(g): The reaction involves the conversion of a solid to two gases, which typically leads to an increase in entropy. Hence, the entropy change is likely positive.

4. H2(g) + Cl2(g) → 2HCl(g): The reaction involves the formation of two moles of a gas from two moles of different gases, which leads to an increase in entropy due to increased molecular motion and randomness. Hence, the entropy change is likely positive.

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Answer:

91.3

2 Significant figures

Answer:

The values have 2 significant numbers ╮(￣ω￣;)╭

The increase in temperature of the embedded bullet is approximately 112.6 °C.

We will find the increase in temperature of the embedded bullet using the given mass, speed, specific heat, and energy conversion factors.
- Mass of the bullet (m) = 3.00 g = 0.003 kg (convert grams to kilograms)
- Speed of the bullet (v) = 240 m/s
- Specific heat of lead (c) = 0.0305 kcal/kg×°C = 0.0305 × 4186 J/kg×°C (convert kcal to Joules)
- Half of the heat energy remains with the bullet

1. Calculate the initial kinetic energy (KE) of the bullet using the formula KE = 1/2 × m × v²
2. Divide the initial KE by 2 to find the heat energy absorbed by the bullet
3. Use the heat energy (Q), mass (m), and specific heat (c) to calculate the increase in temperature (ΔT) using the formula Q = m × c × ΔT

Now let's calculate:

1. KE = 1/2 × 0.003 kg × (240 m/s)² = 86.4 J
2. Heat energy absorbed by the bullet = 86.4 J / 2 = 43.2 J
3. 43.2 J = 0.003 kg × (0.0305 × 4186) J/kg×°C × ΔT

Solving for ΔT:

ΔT = 43.2 J / (0.003 kg × 127.673 J/kg×°C) ≈ 112.6 °C

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Expressing the answer in exponential form we get 3⁴.

To simplify the expression (3⁷/(3³), we can apply the properties of exponents. When dividing two exponential expressions with the same base, we subtract the exponents.

In this case, we have 3⁷ divided by 3³, which can be simplified as:

3⁽⁷⁻³⁾

3⁴

Therefore, the simplified expression is 3⁴.

To understand why we subtract the exponents when dividing, we can break down the steps.

The expression 3⁷ represents 3 multiplied by itself seven times:

3 × 3 × 3 × 3 × 3 × 3 × 3.

The expression 3³ represents 3 multiplied by itself three times:

3 × 3 × 3.

When dividing these two expressions, we can cancel out common factors by subtracting the exponents:

(3 × 3 × 3 × 3 × 3 × 3 × 3) / (3 × 3 × 3)

This simplifies to:

3 × 3 × 3 × 3

Which is equivalent to 3⁴.

Thus, the answer in exponential form is 3⁴

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Answer:

See explanation

Explanation:

The formation of isomers is common to octahedral complexes. Isomers are different compounds with the same molecular formula but different structural formulas. Isomers have different atom to atom connections. Werner's complexes can display; polymerization, ionization, linkage, geometric and optical isomerism among others.

Isomers of coordination compounds are not easily recognizable and not easily separable in the laboratory.

The geometric, linkage and ionization isomers of the complex given in the question are shown below.

The mass of ammonium chloride that will be needed is 27 g.

The number of moles of ammonium nitrate in 35 g is,

n = 35 g / 80.044 g/mol

⇒ n = 0.45 mol

The change in enthalpy caused by the reaction of ammonium nitrate in water is,

ΔH = n × ΔHₓₙ

⇒ ΔH = 0.45 mol × 15.7 kJ/mol

⇒ΔH = 7.1 kJ

The number of moles of ammonium chloride required to change in enthalpy of 7.1 kJ is,

n = ΔH / ΔHₓₙ

⇒ n = 7.1 kJ / 14.8 kJ mol⁻¹

⇒ n = 0.48 mol

The molar mass of ammonium chloride is 53,49 g/mol. The mass of ammonium chloride is,

m = 0.48 mol × 53.49 g/mol

⇒ m = 27 g

Hence, the mass of ammonium chloride that will be needed is 27 g.

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The correct choice is A) −5Δ[Br−]/Δt. The rate expressed as Δ[Br2]/Δt is proportional to -5 times the rate of change of Br−.

In the given reaction 5Br−(aq) + BrO3−(aq) + 6H+(aq) → 3Br2(aq) + 3H2O(aq), the stoichiometric coefficients provide information about the relationship between the reactants and products. To determine the rate expressed as Δ[Br2]/Δt, we need to compare it with the rate of change of the other species.

Based on the balanced equation, for every 5 moles of Br− consumed, 3 moles of Br2 are produced. Therefore, the rate of change of Br−, Δ[Br−]/Δt, is related to the rate of change of Br2, Δ[Br2]/Δt, by a factor of -5/3.

The other choices, B) −0.6Δ[Br−]/Δt, C) 3Δ[BrO3−]/Δt, and D) −Δ[H2O]/Δt, do not correspond to the correct relationship based on the stoichiometric coefficients of the reaction. Therefore, the correct answer is A) −5Δ[Br−]/Δt.

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Answer:

Explanation:

Decomposition reaction, also known as analysis or dissociation, is a type of chemical reaction in which a compound breaks down into simpler substances or elements. In this reaction, a single reactant undergoes a chemical change and produces two or more products.

The decomposition reaction can be represented by the general equation:

AB → A + B

Where AB is the reactant, and A and B are the products. The reactant AB is usually a compound, and it breaks down into its constituent elements or simpler compounds.

There are different types of decomposition reactions, including:

Thermal decomposition: It occurs when a compound is heated, resulting in its decomposition into simpler substances. For example, the thermal decomposition of calcium carbonate (CaCO3) produces calcium oxide (CaO) and carbon dioxide (CO2):

CaCO3 → CaO + CO2

Electrolytic decomposition: It takes place when an electric current is passed through an electrolyte, causing it to break down into its component ions. For instance, the electrolysis of water (H2O) leads to the decomposition into hydrogen gas (H2) and oxygen gas (O2):

2H2O → 2H2 + O2

Photochemical decomposition: It occurs when a compound undergoes decomposition due to exposure to light energy. Chlorine gas (Cl2) can decompose into chlorine atoms (Cl) under the influence of light:

Cl2 → 2Cl

These are just a few examples of decomposition reactions. They are important in various chemical processes and are used in industries, laboratory experiments, and natural phenomena. By understanding and controlling decomposition reactions, scientists can gain insights into the behavior of different compounds and develop practical applications in fields such as chemistry, materials science, and environmental science.

Answer:

Explanation:

reaction in which a compound breaks down into simpler substances or elements

The phosphate buffer can accept 0.5 moles of hydrochloric acid before the pH of the solution begins to change drastically.

In this experiment, you have a buffer containing 0.5 moles of sodium dihydrogen phosphate (NaH2PO4) and 0.5 moles of sodium hydrogen phosphate (Na2HPO4). To determine how many moles of hydrochloric acid (HCl) this phosphate buffer can accept before the pH begins to change drastically, follow these steps:

1. Identify the conjugate acid-base pairs in the buffer system: NaH2PO4 (acid) and Na2HPO4 (base).

2. Calculate the initial moles of both the acid and base in the buffer.
  Initial moles of NaH2PO4 = 0.5 moles
  Initial moles of Na2HPO4 = 0.5 moles

3. Recognize that when HCl is added, it reacts with the base (Na2HPO4) to form the conjugate acid (NaH2PO4) and NaCl as a byproduct.
  HCl + Na2HPO4 -> NaH2PO4 + NaCl

4. Calculate the moles of HCl required to react with all the available base in the buffer.

  Since we have 0.5 moles of Na2HPO4, and the reaction occurs in a 1:1 ratio, it would require 0.5 moles of HCl to react with all the available base.

5. Determine the point at which the pH of the buffer begins to change drastically.

  This occurs when all the available base (Na2HPO4) has been consumed by the added HCl, and the buffer capacity has been exceeded. At this point, the buffer can no longer maintain a constant pH.

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Answer:

D) ionic radius of Br">atomic radius of br

The answer is 3 times

Edit: I'm so sorry if this is incorrect!!!

Answer:

Amino acids are molecules that combine to form proteins.

Explanation:

Amino acids are molecules that combine to form proteins. Amino acids and proteins are the building blocks of life. When proteins are digested or broken down, amino acids are left. The human body uses amino acids to make proteins to help the body: ... Repair body tissue.

Hope this helps :)

Answer:

It means to be included in something, such as a group or activity.  

Explanation:

Answer:

The action or state of including or of being included within a group or structure

OR

The practice or policy of providing equal access to opportunities and resources for people who might otherwise be excluded or marginalized, such as those who have physical or mental disabilities and members of other minority groups.

Explanation:

1. Diana and Mike left the rest of their materials on the table.

2. Cindy picked up the pieces by hand, which is not safe, could've cut her.

3. Dumping chemical in the sink is wrong and should never be done. The also left the water running, which is a waste of water.

Hope this helps :))

Answer:

7.42 atm

Explanation:

The total pressure is just the sum of partial pressures:

2.15 + 4.62 + 0.65 = 7.42 atm

Combine the stoichiometry by a element's subscript to find number of atom.  In 2AI\(_2\)(CO\(_3\))\(_3\), 4 aluminium atom, 3 carbon atom and 9 oxygen atom are there.

Aluminium carbonate is an aluminum carbonate. It is not well defined; according to one reference, simple carbonates of aluminum are unknown.

Yet, similar compounds such as the basic sodium aluminum carbonate solid dawsonite and the hydrated basic aluminum carbonate minerals scarbroite as well as hydroscarbroite are known. To find the number of atoms in an element, combine the stoichiometry by a element's subscript. In  2AI\(_2\)(CO\(_3\))\(_3\), 4 aluminium atom, 3 carbon atom and 9 oxygen atom are there.

Therefore, in  2AI\(_2\)(CO\(_3\))\(_3\), 4 aluminium atom, 3 carbon atom and 9 oxygen atom are there.

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When you stir sugar into your tea with a spoon, the tea keeps swirling

even after you take your spoon out.This is first law of motion.

Motion is defined as a phenomenon which is described with respect to change in object's position with respect to time.It is given in terms of displacement,velocity,distance ,acceleration,speed.

Branch of physics which deals with motion of objects without any reference to it's cause is called kinematics while the branch which studies forces and their effects on motion is called as dynamics.

Motion applies to various systems like objects,bodies, matter particles ,radiation ,curvature.There are three laws of motion which are proposed by Newton.Classical mechanics is based on Newton's law of motion.Relativistic  mechanics is based on modern kinematics.

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Answer:

#3

Explanation:

not sure but it's close to 5,100

Answer:

Temperature and transverse motion are not related.

Explanation: