Determine the total kilojoules in two tablespoons of crunchy peanut butter that contains 6 g of carbohydrate, 11 g of fat, and 9 g of protein.

Answer:

What does a particular point on a line of a phase diagram represent ?

Explanation:

The lines on the phase diagram represent combinations of pressures and temperatures at which two phases coexist in equilibrium.

The phase diagram's lines depict mixtures of pressures as well as temperatures where two phases can peacefully coexist.

A phase diagram shows a visual representation of particular chemical-physical states across various pressures and temperatures.

A phase would be an area of space where a molecule's physical characteristics have been all essentially uniform.

The phase diagram's lines depict mixtures of pressures as well as temperatures where two phases can peacefully coexist.

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Answer:

Volume of carbon dioxide is 428.23 L.

Explanation:

Below is the chemical reaction or chemical equation for the combustion of hydrocarbons such as undecane into carbon dioxide.

[tex]C_{11}H_{24}(l) + 17O_{2}(g) \to 11CO_{2} (g) + 12H_2O(g)[/tex]

Here, undecane is in liquid form that reacts with gaseous oxygen (combustion)  and produces carbon dioxide and water as a product in the gaseous form.

The molar mass of undecane = [tex]156.31 g/mol.[/tex]

[tex]\text{Number of moles} = \frac{260g}{156.31g/mol} = 1.66 \ mol.[/tex]

From the equation, it can be seen that 1 mole of undecane produces 11 moles of carbon dioxide. Therefore, 1.66 mol will produce 18.26 mol of carbon dioxide.

Now find the volume of 18.26 mol of carbon dioxide when the temperature is 13 degrees Celsius and pressure is 1 atm.

[tex]V = \frac{nRT}{P} \\[/tex]

[tex]V = \frac{18.26 \times 0.082 \times 286 \ K}{1atm} \\[/tex]

[tex]V = 428.23 \ L[/tex]

Answer:

No. it,s not possible.

Explanation:

Because you know that ionic compound is having large inter-molecular forces. -77C* is for a compound having v.very small inter-molecular forces.you must know that M.B is directly varing with inter-molecular forces.

Answer:

The pH of the solution is 1.34, being an acidic pH.

Explanation:

pH is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.   The acronym pH stands for hydrogen potential.

The pH scale ranges from 0 to 14. Values ​​less than 7 indicate the acidity range and those greater than 7 indicate alkalinity or basicity. Value 7 is considered neutral. Mathematically, pH is the negative logarithm of the molar concentration of hydrogen or proton ions (H⁺) or hydronium ions (H₃O⁺).

pH= - log [H⁺] = - log [H₃O⁺]

In this case, [H⁺]= 4.6*10⁻² M. Replacing:

pH= - log 4.6*10⁻²

Solving:

pH= 1.34

The pH of the solution is 1.34, being an acidic pH.

Answer:

1.

Mass solution = 28.65 g

Mass percent = 9.14 %

2.

Mass solute = 1.95 g

Mass solution = 48.75 g

3.

Mass solvent = 24.52 g

Mass percent = 6.41 %

4.

Mass solution = 476.8 g

Mass solvent =450.1 g

Explanation:

Hello,

In this case, we define the mass percent as:

[tex]\%m/m=\frac{m_{solute}}{m_{solute}+m_{solution}} *100\%[/tex]

Wherein we use the mass of the solute and the mass of the solvent in order to compute it, thus, for each case we have:

1.

Mass solution: 2.65 g + 26.0 g = 28.65 g

Mass percent: 2.62 g / (2.65 g + 26.0 g) x 100% = 9.14 %

2.

Mass solute: 4.0 % x 46.8 g / (1 - 4.0 %) = 1.95 g

Mass solution: 1.95 g + 46.8 g = 48.75 g

3.

Mass solvent: 26.2 g - 1.68 g = 24.52 g

Mass percent: 1.68 g / (1.68 g + 24.52 g) x 100% = 6.41 %

4.

Mass solution: 26.7 g / 5.6 % = 476.8 g

Mass solvent: 476.8 g - 26.7 g =450.1 g

Best regards.

Answer:

20.9

Explanation:

Answer:

Explanation:

 [ H⁺] = 3.5 x 10⁻⁶ M .

[ H⁺] [ OH⁻] = 10⁻¹⁴

[ OH⁻] x 3.5 x 10⁻⁶ = 10⁻¹⁴

[ OH⁻] = 2.857 x 10⁻⁹ M .

Answer:

the structural units are anions and cations bonded together by strong, non-directional ionic bonds

Answer:

8.90g

Explanation:

2×O=2×16.00=32.00g

mass=0.278×32.00g=8.90g

Answer:

See below

Explanation:

The process through which DNA replicates itself in the course of the cell division shall be DNA replication. There was a mistake. A 'Y' shape is generated by the separation of the two individual DNA strands called a 'field' replication. These two different strands act as models for the creation of new DNA strands

Hope this helps.

Answer:

Here's what I get  

Explanation:

A. Prepare Ca(NO₃)₂ solution

Scoopula  — to transfer the solid to an Erlenmeyer flask

Erlenmeyer flask — to hold the solid for weighing and to prepare the solution

Volumetric flask — to hold the liquid

Funnel — to transfer the solution to the volumetric flask

Wash bottle — to fill the volumetric flask to the mark

B. Weigh K₂SO₄

Scoopula  — to transfer the solid to a weighing bottle

Weighing bottle — to hold the solid for weighing.

C. Add acetic acid to a volumetric flask

Volumetric flask — to hold the acid

Pipet —to measure out the acid and transfer it to the flask

Pipet bulb — safety feature for the pipet and for control of the acid volume.

D. Add NaOH to an acid

Beaker — to hold the NaOH solution

Ring stand — to hold a buret  

Buret clamp — to hold the buret

Funnel — to transfer the solution to a buret

Buret — to hold the NaOH solution for addition to the acid

Answer:

The three parts of the seed are the embryo, endosperm and the seed coat.

Explanation:

The embryo is the young multicellular organism before it emerges from the seed. The endosperm is a source of stored food which consists mostly of starches. The seed coat consists of one or more protective layers that encase the seed.

Hope this helps x

Answer:

a

Explanation:

the others are rude, and rather support this, while a helps to support the ending of white privlige

Answer:

A. Definitely!

Explanation:

If everyone says that in other country that's worst and let it go, racism will never stop! Saying that people of color are overly sensitive is also racist because everyone can be sensitive. There color of skin change nothing! They are humans like everyone and if they want to defend themself, they have the right! Racism still exist and it needs to stop after all these years of sufferance and pain. White people are not better that people of color. Everyone deserve to be equal. Thank you.

Answer:

White school glue is liquid because its long polymers can slide over and along one another. It does not flow easily, though; it is quite viscous. The addition of some chemicals—such as a borax solution (or sodium tetraborate decahydrate dissolved in water)—can cause cross-links to form between the polymers.

Explanation:

Answer:

It is a liquid :]

Answer:

single replacement reaction

Explanation:

This is a kind of single replacement reaction where you switch either cations or anions. Here you switched Ca for H and produced Cacl2 and H2 gas by itself.

Answer:

It is a displacement reaction

Answer:

(a)

From surrounding to wax

(b)

Q = 2.62 KJ

(c)

Density of a substance is defined as the no. of particles of the substance, that occur in a unit volume. So, when the substance melts, the inter-molecular attractive forces and bonds between molecules or atoms are weakened. This, increases the distance between the molecules or atoms. Hence, the no. of particles in a unit volume is decreased. As, a result of this, the density of the substance also decreases.

Explanation:

(a)

During the melting process, the solid material or substance requires energy, in order to break the bonds between its molecules or atoms.

Therefore, while the wax is melting, the net flow of thermal energy is from surrounding to the wax.

(b)

The amount of energy required to melt solid paraffin wax is given by the formula:

Q = nC

where,

Q = amount of energy

C = Molar Heat of Fusion = 48.78 KJ/mol

n = No. of Moles = Mass in gram/Molar Mass = (15.2 g)/(282.62 g/mol)

n = 0.0538 mol

Therefore,

Q = (0.0538 mol)(48.78 KJ/mol)

Q = 2.62 KJ

(c)

Density of a substance is defined as the no. of particles of the substance, that occur in a unit volume. So, when the substance melts, the inter-molecular attractive forces and bonds between molecules or atoms are weakened. This, increases the distance between the molecules or atoms. Hence, the no. of particles in a unit volume is decreased. As, a result of this, the density of the substance also decreases.

(a) During the melting of wax, the flow of thermal energy has been from the surroundings to the wax.

(b) The amount of heat requires for the melting of 15.215 grams of solid paraffin has been 2.62 kJ.

(c) The density decreases due to a decrease in the number of molecules per unit volume.

(a) Melting results in the conversion of solid-state to the liquid state. This step requires energy. Thus, the flow of energy has been from the surroundings to the wax.

(b) Amount of heat requires (Q) can be given by:

Q = nC

Where, n = moles of the sample, and C = heat of fusion

Moles of paraffin = [tex]\rm \dfrac{weight}{molecular\;weight}[/tex]

Moles of paraffin = [tex]\rm \dfrac{15.215}{286.62}[/tex]

Moles of paraffin = 0.0538 moles

Q = 0.0538 [tex]\times[/tex] 48.78 kJ/mol

Q = 2.62 kJ.

The amount of heat requires for the melting of 15.215 grams of solid paraffin has been 2.62 kJ.

(c) The density has been the mass or number of particles present per unit volume. The melting of wax results in a weaker intermolecular force. The resulting liquid will have fewer molecules present in the unit volume.

Thus, the density decreases due to a decrease in the number of molecules per unit volume.

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Answer:cathode

Explanation:It is also known as the galvanic cell or electrochemical cell. In the voltaic cell, the oxidation occurs at an anode which is a negative electrode and the reduction occurs at the cathode which is a positive electrode.

Answer:

2Fe(s) + O₂(g) + 2H₂O(l) → 2Fe(OH)₂(s)

Explanation:

Balanced equation willl be:

[tex]2Fe(s) + O_2(g) + 2H_2O(l) - > 2Fe(OH)_2[/tex]

A balanced chemical equation occurs when the number of the atoms involved in the reactants side is equal to the number of atoms in the products side. In this chemical reaction, nitrogen (N2) reacts with hydrogen (H) to produce ammonia (NH3). The reactants are nitrogen and hydrogen, and the product is ammonia.

On a separate sheet of paper, make a claim in which you mathematically state the rule of balance - that is, the rule that one must use to determine if two weights placed on opposite sides of the fulcrum will balance each other.

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Answer:

One will give you more energy and the other will make you tired!

Explanation:

Answer:

See explaination

Explanation:

please kindly see attachment for the step by step solution of the given problem

Answer:

C.

Explanation:

In C.) Tyler is not suggesting that one race is better than another he is only suggesting his own non biased opinion on what courses should be taught at his school.

Answer:

Explanation:

C

Answer:

The correct answer is 0.300 * 10^23 ions.

Explanation:

Based on the given question, there is a need to find the number of chloride ions in the mentioned 6.8 grams of zinc chloride compound.  

The moles of zinc chloride (ZnCl2) is,  

= mass of zinc + 2 mass of chlorine

= 65.38 + 2 (35.45)

=65.38 + 70.90

= 136.28 grams (The molecular mass of zinc is 65.38 and the molecular mass of chlorine is 35.45)

Thus, 136.28 g of ZnCl2 contains 70.90 grams of chlorine

Therefore, 6.8 grams of ZnCl2 will comprise = (70.90/136.28) * 6.8

= 3.537 g of chlorine

70.90 g of Cl comprise 6.022*10^23 chlorine, thus, 3.537 g of Cl will comprise (6.022*10^23/70.90) * 3.537

= 0.300 * 10^23 ions of chlorine.  

Answer:

5.5 amps

Explanation:

V = I*R

110 = 20I

I = 5.5

Answer:

Explanation:

check the image

a)

The workdone on the gas during during the isobaric compression

W = pΔV

= nRΔT

= 2 * 8.314 * (273-110)

=2710J

b) The workdone on the gas during during the isothermal expansion

[tex]W= nRT_fIn(\frac{V_f}{V_i} )\\\\2*8.314*110In\frac{110}{273} \\\\=-1662.6J[/tex]

Answer:

a) The work done during the isobaric compression is 4060.91 J.

b) The work done during the isothermal expansion is 2489.58 J.

Explanation:

a) Here we have two different processes. We calculate the work done during the isobaric compression using the following formula:

[tex] W= -P. (V₂ - V₁) [/tex]

Since the process is isobaric, the pressure is constant. First we need to find this value. In order to do that, we use the ideal gas equation:

[tex] p.V= n.R.T [/tex]

[tex] p= [n.R.T] ÷ V = [3 mol × 0.082 (L.atm÷mol.K) × 273 K] ÷ 3 L [/tex]

p = 22.39 atm

Now, we need to find V₂. We do this using Charles' law:

[tex] V₁/T₁ = V₂/T₂ [/tex]

[tex]  V₂ = V₁/T₁ × T₂ = 3 L ÷ 273 K × 110 K [/tex]

V₂ = 1.21 L

Now we are in condition to calculate the work done during the isobaric compression:

[tex] W= -P. (V₂ - V₁) [/tex]

[tex] W= -22.39 atm. (1.21 - 3) L [/tex]

W= 40. 07 L.atm

We multiply this value by 101.325 to convert it to joules: W= 4060.91 J

b) To calculate the work done during the isothermal expansion, we use the following equation:

[tex] W = n.R.T. ln (V₂/V₁) [/tex]

[tex] W = 3 mol ×0.082 (L.atm/mol.K) × 110 K × ln (3L / 1.21 L) [/tex]

W= 24.57 L.atm

We convert this value to joules: W= 2489.58 J

Answer:

A) It indicates the direction in which the reaction occurs.

Explanation:

The reason we don't use equals signs (=) in chemical reactions is because of the Identity Property of Equality (if a = b then b = a), which would allow us to reverse reactions. Reactions can't just be reversed (since some don't even occur); we need to know what is reacting to make what. Thus, we use the arrow, or yields symbol to denote this.

The substances to the left of the sign are the reactants, the ones that are reacting, and the ones on the right are the products, the ones that are being produced from the reactants. The arrow is an excellent way to represent the direction the reaction occurs in as the way it's written clearly demonstrates direction.

Hope this helps!

Answer: 1) [tex]RCOO^-[/tex]

2) [tex]H_2PO_4^-[/tex]

3) [tex]RNH_2[/tex]

4) [tex]HCO_3^-[/tex]

Explanation:

According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.

1) [tex]RCOOH\rightarrow RCOO^-+H^+[/tex]

Here, [tex]RCOOH[/tex] is loosing a proton, thus it is considered as an acid and after losing a proton, it forms [tex]RCOO^-[/tex] which is a conjugate base.

2) [tex]H_3PO_4\rightarrow H_2PO_4^-+H^+[/tex]

Here, [tex]H_3PO_4[/tex] is loosing a proton, thus it is considered as an acid and after losing a proton, it forms [tex]H_2PO_4^-[/tex] which is a conjugate base.

3) [tex]RNH_3^+\rightarrow RNH_2+H^+[/tex]

Here, [tex]RNH_3^+[/tex] is loosing a proton, thus it is considered as an acid and after losing a proton, it forms [tex]RNH_2[/tex] which is a conjugate base.

4) [tex]H_2CO_3\rightarrow HCO_3^-+H^+[/tex]

Here, [tex]H_2CO_3[/tex] is loosing a proton, thus it is considered as an acid and after losing a proton, it forms [tex]HCO_3^-[/tex] which is a conjugate base.

Answer:

Hexane

Explanation:

These are hydrocarbons from the same group with general formula CnH2n+2.

So, the more molecular mass are (the more number of carbons) the higher boiling point will be.

Hexane has the most number of carbon atoms(6) , so the highest molecular mass and the highest boiling point.

Answer:

[tex]3H_2S+2Ga(ClO_3)_3\rightarrow Ga_2S_3+6HClO_3[/tex]

Explanation:

Hello,

In this case, the described chemical reaction is:

[tex]H_2S+Ga(ClO_3)_3\rightarrow Ga_2S_3+HClO_3[/tex]

After balancing, we must assure the same quantity of atoms of all the elements at both reactants and products:

[tex]3H_2S+2Ga(ClO_3)_3\rightarrow Ga_2S_3+6HClO_3[/tex]

Thus, we find two galliums, three sulfurs, six chlorines, six hydrogens and eighteen oxygens at both reactants and products.

Best regards.

Answer: The reaction rate will DECREASE.

Explanation:

Chemical reaction occurs through the combination of chemical reactants to form new products. The rate if this reaction is affected by the following factors:

- the chemical nature of the reacting substances,

- the state of subdivision (one large lump versus many small particles) of the reactants,

- the temperature of the reactants,

- the concentration of the reactants, and

- the presence of a catalyst.

When additional liter of pure water is added to the reaction mixture, collision between reactant molecules is reduced The dilution causes the concentration of the reactants to reduce. This in turn affects the rate of chemical reactions as the decreased concentration of reactants leads to a decrease in the reaction rate.

Answer:

a specific amount edta is added to a specific amount of distilled water

Explanation:

Answer:

The answer is "16"

Explanation:

In the question given, it asks about the partial carbon dioxide ([tex]CO_2[/tex]) pressure, which is directly related to the oxygen ([tex]O_2[/tex]) to carbon dioxide ([tex]CO_2[/tex]) mole ratio, which is 1 to 4.