Trying to find the energy in calories but, I don't understand the last part of the formula. Please help!
energy in calories = (mass of water)(change in water temperature)(0.001 Cal/g·°C)
Food Item: Peanut
Mass Of Food (g): 0.3
Mass Of Water (g): 51.4
Initial Water Temperature (°C): 21.2
Final Water Temperature (°C): 39.8
Energy (calories): ???

Answer:

4

Explanation:

4

Answer:

two H atoms

Explanation:

is the answer I think

Solution A with pH of 8 has greater concentration of hydronium ions as compared to solution B with pH of 13.5.

pH = -log [H3O+]. By using the opposite mathematical procedure from that used to determine the pH, the hydronium ion concentration can be calculated from the pH.

The pH lowers as the hydronium content rises, making the fluid more acidic. When an acid is introduced, this happens. The solution's hydronium concentration rises when H+ ions separate from the acid and join with water to produce hydronium ions.

Any time an acid dissolves in water, the hydronium ion is created. The nearest water molecule is always where the acid's H+ moves to produce H3O+. Take the perspective of the proton (H+) to see the hydronium ion from a different angle. Hydration refers to the addition of water to anything.

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To reduce camphor with NaBH4, you can follow these steps:

1. Dissolve the camphor in a suitable solvent such as methanol or ethanol. 2. Prepare a solution of NaBH4 in the same solvent, making sure to handle the reagent with care as it is a strong reducing agent. 3. Slowly add the NaBH4 solution to the camphor solution while stirring continuously. 4. The reaction will proceed quickly, and you should observe the solution becoming cloudy or forming a precipitate. 5. Allow the mixture to stir for a few more minutes to ensure complete reduction of the camphor. 6. After the reaction is complete, you can isolate the product by filtering the mixture and washing it with water or a suitable solvent to remove any impurities.

The reduction of camphor with NaBH4 is a complex chemical reaction that involves several steps and variables, including the choice of solvent, reaction conditions, and the stoichiometry of the reagents. Therefore, it's important to have a good understanding of the chemistry involved and to follow proper safety protocols when working with NaBH4.

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Answer:

A) oxidizing agent is SO2

B) NaClO is the oxidizing agent

Explanation:

A) This is a redox reaction in which oxidation and reduction occur simultaneously.

Thus, in 2H2S(g) + SO2(g) -> 2H2O(l) + 3S(s);

H2S is reduced as follows;

H2S → S + 2H+ + 2e−

We can see that SO2 has been reduced while H2S gets oxidized since it has changed state from - 2 to 0 . Thus sulphur dioxide is the oxidizing agent.

B) SO2(g) + H2O(l) + NaClO(aq) -> NaCl(aq) + H2SO4(aq)

In this, SO2 undergoes oxidation and NaClO is the oxidizing agent

The molecular formula of the unknown compound is C2H2O2.

To determine the molecular formula of the unknown compound, we need to calculate the empirical formula first and then find the multiple of its subscripts to obtain the molecular formula.

Given:

Percentage of carbon = 40.0%

Percentage of hydrogen = 6.7%

Percentage of oxygen = 53.3%

Molecular mass = 60.0 g/mol

Step 1: Convert the percentages to grams.

Assuming we have 100 grams of the compound:

Mass of carbon = 40.0 g

Mass of hydrogen = 6.7 g

Mass of oxygen = 53.3 g

Step 2: Convert the masses to moles using the molar masses of the elements.

Molar mass of carbon = 12.01 g/mol

Molar mass of hydrogen = 1.008 g/mol

Molar mass of oxygen = 16.00 g/mol

Number of moles of carbon = Mass of carbon / Molar mass of carbon

= 40.0 g / 12.01 g/mol

= 3.332 mol

Number of moles of hydrogen = Mass of hydrogen / Molar mass of hydrogen

= 6.7 g / 1.008 g/mol

= 6.648 mol

Number of moles of oxygen = Mass of oxygen / Molar mass of oxygen

= 53.3 g / 16.00 g/mol

= 3.331 mol

Step 3: Determine the empirical formula by dividing the moles by the smallest value.

Dividing the moles of carbon, hydrogen, and oxygen by 3.331 gives approximately 1 for each element.

So, the empirical formula of the compound is CHO.

Step 4: Determine the multiple of the subscripts to obtain the molecular formula.

To find the multiple, we divide the molecular mass by the empirical formula mass.

Molecular mass = 60.0 g/mol

Empirical formula mass = (12.01 g/mol) + (1.008 g/mol) + (16.00 g/mol) = 29.018 g/mol

Multiple = Molecular mass / Empirical formula mass

= 60.0 g/mol / 29.018 g/mol

= 2.07

Rounding to the nearest whole number, we get 2.

Therefore, the molecular formula of the unknown compound is C2H2O2.

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Answer:

The answer Is c. mole fraction of ethanol in water=0.50

Explanation:

Answer: 500 individual nerds candies for $5 would be better bc u would have more candy and it would last a while

Explanation: would have more candies

To solve this we must be knowing each and every concept related to division. Therefore, 500 individual nerds candy for $5 is preferable since you will have more candy and it will last longer.

Division is one of four fundamental mathematical operations, the others being addition, subtraction, and multiplication. Division is defined as the equal division of larger groups into smaller units.

The division of labor is the sequence of tasks given to and performed by the  group of staff in order to maximize efficiency. The splitting down of a job into multiple separate parts that make up the total is referred to as division of labor. 500 individual nerds candy for $5 is preferable since you will have more candy and it will last longer.

Therefore, 500 individual nerds candy for $5 is preferable since you will have more candy and it will last longer.

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The name of an aqueous solution of HBr (hydrobromic acid) is simply HBr(aq).

An aqueous solution refers to a solution in which water is the solvent, and in this case, HBr is the solute. Hydrobromic acid, which has the formula HBr, is a strong acid that can dissolve in water to form H+ and Br- ions. When HBr is dissolved in water, the resulting solution is acidic due to the presence of these ions. It is important to note that the acidity of the solution will depend on the concentration of HBr in the solution. Therefore, the pH of an aqueous solution of HBr will vary based on the concentration of the solution.

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Answer:

Silver ions 1 Hydrogen ions 2 Iron ions 3 Sodium ions 4

Explanation:

From a single fossil, scientists can directly gather information about the physical characteristics and morphology of the organism that left the fossil.Option B. What the organism looked like is the correct nswer.

Fossils can preserve various parts of an organism, such as bones, teeth, shells, or even imprints of soft tissues. By studying the fossil's structure, shape, and features, scientists can infer the appearance and anatomical details of the organism, including its size, shape, skeletal structure, and sometimes even its coloration or texture.

While scientists can make educated guesses about other aspects, such as how the organism is related to present-day organisms (A), its reproductive behavior (C), or the exact lifespan (D), these details are typically inferred through comparative studies, analysis of multiple fossils, and other lines of evidence.

However, directly from a single fossil, the most immediate and concrete information that can be obtained is about the physical characteristics and appearance of the organism (B).Option B is correct.

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Answer:

D

Explanation:

More liquid water molecules will change to water vapor until a

new equilibrium is reached.

Answer:

Equilibrium and Stability Quick Check

1. The rate of the forward reaction equals the rate of the reverse reaction.

2. More LIQUID WATER molecules will change to WATER VAPOR until a new equilibrium is reached.

3. By adding WATER (H2O).

4. The additional BROMINE IONS cause the equilibrium to shift to the REACTANTS.

5. Removing WATER (H2O).

Explanation:

100% if you put these answers.

Approximately 3.72 liters of liquid nitrogen would be produced when 658.0 L of nitrogen gas is liquefied at 77.36 K.

To determine the number of liters of liquid nitrogen produced when 658.0 L of nitrogen gas is liquefied at 77.36 K, we can use the information about the density of the liquid and gas phases.

Given:

Density of the liquid nitrogen (at boiling point) = 809 g/L

Density of the nitrogen gas = 4.566 g/L

Let's denote the volume of liquid nitrogen produced as V_liquid.

Since density is defined as mass divided by volume, we can set up the following equation for the liquid phase:

809 g/L = mass_liquid / V_liquid

Simplifying the equation, we have:

mass_liquid = 809 g/L * V_liquid

Similarly, for the gas phase:

4.566 g/L = mass_gas / 658.0 L

mass_gas = 4.566 g/L * 658.0 L

Now, since the mass remains constant during the phase transition (liquefaction), we can equate the masses of the liquid and gas phases:

809 g/L * V_liquid = 4.566 g/L * 658.0 L

Solving for V_liquid:

V_liquid = (4.566 g/L * 658.0 L) / 809 g/L

V_liquid ≈ 3.72 L

Therefore, approximately 3.72 liters of liquid nitrogen would be produced when 658.0 L of nitrogen gas is liquefied at 77.36 K.

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The orbital diagram of a secondary vinylic carbocation [picture]

Why is a vinyl carbocation unstable?

That p orbital's failure to overlap with the sp2 orbitals of the carbon on the other end of the double bond is what causes the instability. The stabilisation of the cationic centre is prevented by the overly large (120*) and very electronegative bond angles of that carbon.

A vinylic carbocation is a carbocation in which a carbon-carbon double bond contains the carbon atom with the open octet and positive formal charge. There is sp hybridization in the carbon carbocation. The carbocation is known as a vinylic carbocation if the carbon carrying the positive charge is a component of an alkene.

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The missing subscript that will balance the equation is 92.

The given Radioactive decay chemical equation is,

²³⁴U → ²³⁰Th₉₀ + ⁴He₂ + Energy

In the above reaction, the Uranium atom is decayed into the Thorium atom and a helium nucleus is released from Uranium along with energy.

When a bigger atom is unstable, it decays into smaller stable atoms by radioactive decay, one such decay is Alpha Decay.

In Alpha Decay, the mass number of the decaying particle gets reduced by four units and the atomic number of the decaying particle reduces by two. i.e. A helium nucleus is released from the the particle.

So the atomic of the not decayed uranium will be 2 more then the atomic number of thorium.

So, our balanced reaction will be,

²³⁴U₉₂ → ²³⁰Th₉₀ + ⁴He₂ + Energy.

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The Ksp is 6.2 * 10^-5

The molar solubility is  0.046 M

Molar solubility is a measure of the maximum amount of solute that can dissolve in a solvent to form a saturated solution at a particular temperature and pressure. It is usually expressed in moles of solute per liter of solvent.

1) We know that;

Ksp = [Zn^2+] [C2O4^2-] = [x^2]

Ksp = ( 7.9 x 10^-3)^2

Ksp = 6.2 * 10^-5

2) For BaCrO4,

Ksp = 2.1 * 10^-3

Ksp = x^2

x = √2.1 * 10^-3

x = 0.046 M

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The reaction is  the reduction – oxidation reaction is the :

Ca(OH)₂ + 2CH₃COOH → Ca(CH₃COO)₂ + 2H₂O. The correct option is d.

The gain of the electron is the reduction. In the reduction the oxidation number will increases. The loss of the electron during the reaction is called the oxidation and the decrease in the oxidation number is the oxidation. When both occur in the reaction the reaction is said to be the redox reaction or the reduction – oxidation .

The reaction is as:

Ca(OH)₂ + 2CH₃COOH → Ca(CH₃COO)₂ + 2H₂O

This  is not the redox reaction as the oxidation states of the multiple atoms is not change during the reaction.

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Answer:

\(3x - 12 = 0 \\ 3x = 12 \\ x = 12 \div 3 \\ x = 4 \\ thank \: you\)

Answer:x=4

Explanation:

3x-12+12=0+12

3x=12

3x/3=12/3

x=4

Answer:

The total number of protons and neutrons in the nucleus of an atom is called mass number.

Answer:

mass number also called nucleon number and it's the total number of neutron and proton in an atomic nucleus.

Answer:

False

Explanation:

Catalysts are reusable because they keep the chemical reactions moving without being consumed.

The correct option is C, The low melting point of unsaturated fats is due to double bonds forming structures that stop tightly bound formations.

The melting point is defined as the temperature at which a solid substance changes into a liquid state. At this point, the molecules of the solid substance gain enough energy to overcome the intermolecular forces that hold them in a fixed position, allowing them to move around and assume the shape of the container they are in. The melting point is a physical property that can be used to identify a substance and to determine its purity.

A pure substance has a specific melting point, which is a characteristic property of that substance. Impurities, however, can lower the melting point and broaden the temperature range over which melting occurs. Therefore, melting point determination can be used as a qualitative and quantitative tool for assessing the purity of a substance.

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Complete Question:

live oil and butter both contain fats; however, olive oil is liquid at room temperature and butter is solid. why? multiple choice

A). Double bonds in saturated fats create tightly bound molecules that need higher temperatures to break apart.

B). Fewer strands of cis and trans-fatty acids in unsaturated fat make their bonds weaker.

C). The low melting point of unsaturated fats is due to double bonds forming structures that stop tightly bound formations.

D). Saturated fats contain more ch2 molecules, thus forming a larger mass that is tightly bound and solid.

Scientists have hypothesized that the O157:H7 strain of E. coli is so different from the K-12 strain due to a process called horizontal gene transfer. This is the transfer of genetic material between different bacteria, and it can occur through mechanisms such as conjugation, transformation, and transduction.

In the case of E. coli O157:H7, it is believed that the strain acquired new genes through horizontal gene transfer from other bacteria. These new genes may have provided the strain with new capabilities, such as the ability to produce toxins and survive in new environments. This could explain why the O157:H7 strain is more pathogenic and causes more severe illness than the K-12 strain.

Horizontal gene transfer is an important mechanism for the evolution and adaptation of bacteria, and it plays a significant role in the emergence of new bacterial strains with unique characteristics.

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Answer:

342g/mol

Explanation:

Molar mass of carbon=12, hydrogen=1 and oxygen=16

therefore C12H22O11=12(12)+22(1)+11(16)

=144+22+176

=342g/mol

All possible types of intermolecular forces that can form between particles of :

(a) CS2: London dispersion forces

(b) CH2Br2: Dipole-dipole interaction and H-bonding

What are intermolecular forces?

Intermolecular forces, frequently abbreviated to IMF, are the appealing and repulsive forces that stand up among the molecules of a substance. These forces mediate the interactions among man or woman molecules of a substance. Forces additionally exist among the molecules themselves and those are together called intermolecular forces. Intermolecular forces are specifically answerable for the bodily traits of the substance. There are 5 varieties of intermolecular forces. They are as follows-

Thus, al the types of intermolecular forces possible between particles of :

(a) CS2: London dispersion forces

(b) CH2Br2: Dipole-dipole interaction and H-bonding

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The use of a large excess of alcohol can shift the equilibrium in the Fischer esterification to the right.

Fischer or Fischer-Speier esterification is a special type of esterification involving the formation of an ester by refluxing a carboxylic acid and an alcohol using an acid catalyst.

The structure, molecular weight and type of alcohol have a marked influence on the rate of esterification and the degree of conversion at equilibrium.

Another factor that can shift the Fischer esterification equilibrium to the right is temperature.

An increase in temperature can also amplify the equilibrium production, as occurs in most steriflcation reactions, but this comes to a controlled stop due to the boiling point of the alcohol of the acid, which is avoided if the reactor is works under pressure, allowing this to increase the temperature.

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Answer:

\(NaSO_{4}\)

Explanation:

Asúmase que existen 100 gramos de compuesto, las cantidades molares de cada componente son, respectivamente: (Let assume that exist 100 grams of the composite, the molar quantities of each component are, respectively:)

Na

\(n = \frac{19.3\,g}{22.99\,\frac{g}{mole} }\)

\(n = 0.839\,moles\)

S

\(n = \frac{26.9\,g}{32.065\,\frac{g}{mole} }\)

\(n = 0.839\,moles\)

O

\(n = \frac{53.8\,g}{15.999\,\frac{g}{mole} }\)

\(n = 3.363\,moles\)

La fórmula molecular empírica es (The empirical molecular formula is):

\((Na_{0.839}S_{0.839}O_{3.363})_{1.192}\)

\(NaSO_{4}\)

The type of heat transfer you are referring to here is convection.