10. What are saturated and unsaturated fatty acids?

Taking into account the definition of molarity, the final sugar solution has a concentration of 5.028 M.

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

molarity= number of moles÷ volume

Molarity is expressed in units [tex]\frac{moles}{L}[/tex].

In this case, you mix 20.0 mL (0.02 L) of a 3.00 M sugar solution with 30.0 mL (0.03 L) of a 6.38 M sugar solution. To know the concentration of the sugar solution, you need to find the total moles of sugar solution from the mixtures as follow:

Now, the total volume of the solution is calculated adding the volume of the two solutions:

total volume= 20 mL + 30 mL= 50 mL= 0.05 L

Replacing the values inf the definition of molarity:

molarity= 0.2514 moles÷ 0.05 L

Solving:

molarity= 5.028 M

Finally, the final sugar solution has a concentration of 5.028 M.

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Answer:

The correct answer is a hypothesis.

This is an exercise in the general or combined gas law.

To start solving this exercise, we obtain the following data:

We use the following formula:

P₁V₁T₂ = P₂V₂T₁ ⇒ General formula

Where

We clear the formula for the initial volume:

[tex]\boldsymbol{\sf{V_{1}=\dfrac{P_{2}V_{2}T_{1}}{P_{1}T_{2}} } }[/tex]

We substitute our data into the formula to solve:

[tex]\boldsymbol{\sf{V_{1}=\dfrac{(3.69 \not{atm})(56.4 \ ml)(295.5 \not{k})}{(1.95 \not{atm})(284.9\not{k})} }}[/tex]

[tex]\boldsymbol{\sf{V_{1}=\dfrac{61498.278}{555.555} \ lm }}[/tex]

[tex]\boxed{\boldsymbol{\sf{V_{1}=110.697 \ lm }}}[/tex]

The helium-filled balloon has a volume of 110.697 ml.

Answer:

111  ml

Explanation:

Use the general rule for gases:

P1 V1 / T1    =   P2 V2 / T2      Looking for V1     T must be in Kelvin

re-arrange to :

V1 =   P2 V 2  * T1 / (T2 * P1)      <==== now sub in the values

V1 = 3.69 * 56.4 * (22.5 + 273.15) / [(11.9 + 273.15) * 1.95]

V1 = 110.6949 ml

    for correctness, the answer should only have THREE significant digits as all of the factors have three SD

V1 = 111 ml

Answer:

The rate of dissolving is influenced by several factors, including stirring, temperature of solvent, and size of solute particles.

Answer:

emiprical formula is 55

Explanation:

(-^〇^-)

Sn^2+ + Br2 ---> Sn^4+ + 2Br^- is referred to as a non-spontaneous redox reaction.

This type of reaction doesn't favor the formation of the product and must be endothermic.

In the reaction above under the given conditions, ΔG is positive and it is intended to form Sn(s) and Br(l) through the reduction of tin cation to make bromine liquid and tin solid. This therefore points to the direction of the reaction being non-spontaneous one.

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Answer:

Silver

Explanation:

What mass of copper was discharge at the cathode in a cell

Answer:

7.5 x 10 ^-11

Explanation:

6/8 = .75

10^2 / 10^12   = 10^ (2-12) = 10^(-10)

so far    .75  x 10^-10  

    which is   7.5 x 10^-11

Taking into account the definition of pH and pOH, the hydroxide ion concentration will be 6.61×10⁻⁵ M.

pH is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.

The pH is defined as the negative base 10 logarithm of the activity of hydrogen ions, that is, the concentration of hydrogen ions or H₃O⁺:

pH= - log [H⁺]= - log [H₃O⁺]

Similarly, pOH is a measure of hydroxyl ions in a solution and is expressed as the logarithm of the concentration of OH⁻ ions, with the sign changed:

pOH= - log [OH⁻]

The following relationship can be established between pH and pOH:

pOH + pH= 14

In this case you know that the hydrogen ion concentration is 1.5×10⁻¹⁰ M, this is, [H⁺]= 1.5×10⁻¹⁰ M.

Replacing in the definition of pH:

pH= - log (1.5×10⁻¹⁰ M)

Solving:

pH=  9.82

Replacing in the relationship established between pH and pOH, the pOH can be calculated as:

pOH + 9.82= 14

Solving:

pOH= 14 - 9.82

pOH= 4.18

Replacing in the definition of pOH, the concentration of hydroxide ion is obtained:

- log [OH⁻]= 4.18

Solving:

[OH⁻]= 10⁻⁴ ¹⁸

[OH⁻]= 6.61×10⁻⁵ M

In summary, the hydroxide ion concentration will be 6.61×10⁻⁵ M.

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Answer:

4.0  x 10^-6 moles

Explanation:

0.0040 M Ba(OH)2      means there is .0040 moles per liter

    you want 1 ml which is 1/1000 liter so you get 1/1000 of the moles

= .0000040 moles

The correct alternative is (b). NaOH will be present in the test tube, after performing electrolysis.

Aqueous electrolysis of salt solutions finds the salt ions in competition with electrolysis of water at the respective electrodes. That is, water can undergo reduction at the cathode as can the cation of the salt; while at the anode water can undergo oxidation as can the anion of the salt. The reactions are as follows:

Cathode:

H₂O(l) + 2e⁻ ⇄ 2OH⁻(aq) + H₂(g)

Anode:  

2H₂O(l) ⇄ O₂(g) + 4H⁺(aq) + 4e⁻

The distinction can be determined by comparing the 'Standard Reduction Potentials' of the half-reactions.

For NaCl(s) => Na⁺(aq) + Cl⁻(aq) :

At the Cathode:

Na⁺ + e⁻ => Na⁰(s); εo = -2.71v

2H₂O(l) + 2e⁻ ⇄ 2OH⁻(aq) + H₂(g); εo = -0.83v (Dominant Rxn at cathode – more positive value)

At the Anode:

Cl⁻(aq) => Cl₂(g) + 2e⁻; εo = 1.36v

2H₂O(l) => O₂(g) + 4H⁺ + 4e⁻; εo = 1.23v (Dominant Rxn at anode – more positive value)

Since the more dominant reaction at the cathode(reduction) produces hydroxide ions, the solution would become alkaline with Na⁺ ions already present.

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The condition that will increase the entropy in a reaction is heating up the reaction (option B).

Entropy in chemistry is the measure or degree of the disorder or randomness present in a chemical system.

In a chemical reaction, reacting substances called reactants collide with one another to form products.

However, the degree at which the reactants collide with one another is referred to as the entropy of the reaction.

Therefore, the condition that will increase the entropy in a reaction is heating up the reaction i.e. increase in temperature.

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Based on the role of ubiquitin in protein deconstruction as stated in the passage, the correct options are as follows:

Phrases refers to a group of words which contains a verb but which on their own do not make complete sense.

In the description of the role of Ubiquitin, it is described as a small polypeptide chain containing 76 amino acids. The main tole of ubiquitin is to tag proteins for deconstruction in the proteasomes.

Therefore, the phrase describes the purpose of ubiquitin is to tag waste proteins for recycling in the proteasomes; option A.

Based on the passage, the statement that describes the overall consequence of proteins containing mutations is: Wastes will build up in vital organs, and the organism will experience disease; option D

Individuals with spinocerebellar ataxia experience loss of muscle control, even though the ataxin-1 protein builds up only in the brain and spinal cord because the neurons affected by the ataxin-1 protein buildup are in a region of the brain that manages muscle control; option D.

In conclusion, mutations in ubiquitin-tagged proteins will result in accumulation in the body since they cannot be deconstructed in the proteasomes.

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Taking into account the definition of dilution, moles of solute (option C) is the only thing about the solution that does NOT change.

When it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution.

Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where

In summary, moles of solute (option C) is the only thing about the solution that does NOT change.

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[tex] \quad \quad\quad\huge \tt{ANSWER}[/tex]

Hydrocarbons are organic compounds which made up of only carbon and hydrogen.

[tex] \pink{ \star}[/tex]Carbon - ( C )

[tex] \pink{ \star}[/tex]Hydrogen - ( H )

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

[tex] \red{✿}[/tex] Type of Hydrocarbon :

[tex] \purple{\mathfrak{llXecretll}}[/tex]

Answer:

61 atm

Explanation:

You can calculate osmotic pressure using the following equation:

π = i MRT

In this equation,

-----> π = osmotic pressure (atm)

-----> i = van't Hoff's factor

-----> M = molarity (M)

-----> R = Ideal Gas Constant (0.08206 atm*L/mol*K)

-----> T = temperature (K)

The van't Hoff's factor is the amount of ions the substance dissociates into. Since sugar does not dissociate, this value is 1. After converting Celsius to Kelvin, you can plug the values into the equation and simplify.

i = 1                                 R = 0.08206 atm*L/mol*K

M = 2.5 M                      T = 25 °C + 273.15 = 298.15 K

π = i MRT

π = (1)(2.5 M)(0.08206 atm*L/mol*K)(298.15 K)

π = 61 atm

The correct IUPAC name of the following structure CH2=CH2-CH-CH3 is But - 1 - ene

Hence the structure CH2=CH-CH2-CH3 is named on the basis of the above rule as but - 1 - ene.

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Answer:

1187   ( four   S.D. )

Explanation:

(433.621 - 333.9) × 11.900         333.9 has only 4 S.D.      answer should only have 4 S.D

= 1186.6799 = ~  1187     with 4 Significant Digits

Stoichiometry is used in formulating airbags that shows relationship between product and reactants.

The quick chemical decomposition of solid sodium azide (NaN3) that allows the air bag to inflate fast at any time when the car hit anything. The decomposition reaction is initiated in a car by a small ignition that occurs due to collision sensing mechanism. The nitrogen gas produced during the reaction inflates the air bag which protect the person in the car.

So we can conclude that Stoichiometry is used in formulating airbags that shows relationship between product and reactants.

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Stoichiometry is important in formulating airbags, producing contrails, or formulating rocket engines so as to ensure the required amount of products are formed.

Stoichiometry is the molar relationship between the reactants and products of a reaction.

It is the ratio in which moles of reactants of a reaction combine to form moles of products.

Stoichiometry is important in determining the amount of reactants required to produce a given amount of products.

For example, stoichiometry is important in formulating airbags, producing contrails, or formulating rocket engines in order to ensure the mass of reactants used is enough to produce the required products.

In conclusion, stoichiometry of  a reaction provides the knowledge about the amount of reactants required to form products.

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The transformations that result in increase in entropy are those that result in increased disorderliness and they are:

The entropy of  a system is a measure of the degree of randomness or disorderliness of a system.

When a system changes from a more ordered state to a more disordered state, there is an increase in the entropy of the system.

Increase in temperature or volume also results in increase in entropy.

For example, when solid melts to form liquid, entropy increases. Also, when liquid changes to gas, entropy of the system increases.

Based on the above transformations:

In conclusion, an increase in disorderliness of a system results in entropy increase.

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Let's see what I can come up with here. So chloroplasts are made up of several separate sections. They have the stroma (the liquid in which everything is contained) and the grana (plural of granum and is a stack of thylakoids). Chlorophyll is found in thylakoids.

The chlorophyll absorbs light (not green light since that is what is reflected to our eyes). Light energy is utilized to split water into hydrogen ions, electrons, and oxygen gas. With these ions and electrons, the electron transport chain, with the assistance of enzymes, produces ATP and NADPH. In all living cells, ATP is the primary source of energy. Because light is required to split water, this step of photosynthesis is known as the "light reaction."

The ATP and NADPH are transported into the stroma, where the "dark reaction" can take place. And, despite the name, it does not occur at night since our energy source does not store well. You've probably heard of the Calvin Cycle. The Calvin Cycle basically uses water, CO2, and the energy from earlier to generate carbohydrates, which are then stored in various ways. Glucose is the most well-known monosaccharide, although there are others, as well as countless polysaccharides such as cellulose and starch.

Thank you,

Eddie

Answer:

A.) 1.845

Explanation:

You can find the pOH using the following equation:

pOH = -log[OH⁻]

Since NaOH dissociates into 1 Na⁺ and 1 OH⁻, the concentration of both ions is 0.0143 M.

pOH = -log[OH⁻]

pOH = -log[0.0143]

pOH = 1.845

Answer:

14 L

Explanation:

To find the volume, you need to (1) convert grams to moles (via molar mass) and then (2) calculate the volume (via molarity equation). The final answer should have 2 sig figs to match the sig figs of the given values.

(Step 1)

Molar Mass (NH₄NO₃): 80.043 g/mol

 25 grams NH₄NO₃                 1 mole
-------------------------------  x  -------------------------  =  0.312 moles NH₄NO₃
                                           80.043 grams

(Step 2)

Molarity = moles / volume

0.023 M = 0.312 moles / volume                <----- Insert values

(0.023 M) x volume = 0.312 moles             <----- Multiply both sides by volume

volume = 14 L                                               <----- Divide both sides by 0.023

Volume, in liters, of 0.023 M NH₄NO₃ solution can be made using 25 g NH₄NO₃ are 13.47L.

Molarity of a given solution is known as the total number of moles of solute per litre of the solution.  A solution that is 1.00 molar (written 1.00 M) contains 1.00 mole of solute for every liter of solution.

Molarity = (No. of moles of solute ÷ Volume of solution in liters)

The unit of molarity is mol L⁻¹.

Molarity is temperature dependent because as temperature changes, volume of the solution also changes.

No. of moles of solute = Mass / Molar mass

No. of moles of solute = 0.31

Hence,

Volume of solution in liters = No. of moles of solute ÷ molarity

= 13.47 litres

Therefore, Volume, in liters, of 0.023 M NH₄NO₃ solution can be made using 25 g NH₄NO₃ are 13.47L.

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The equation for the autoionization of water is-

NH3 + H2O → NH4+ + OH− (H2O acts as an acid)

HCl + H2O → H3O+ + Cl− (H2O acts as a base)

Autoionization of water, the autoionization constant Kw, and the relationship between [H⁺] and [OH⁻] in aqueous solutions.

Water can undergo autoionization to form and ions.

The expression for the autoionization constant is

[tex]The expression for the autoionization constant isK_\text{w}=[\text{H}_3\text{O}^+][\text{OH}^-]\quad\quad\text{(Eq. 1)}K w​ =[H 3​ O + ][OH − ][/tex]

In this way the autoionization of water,

NH3 + H2O → NH4+ + OH− (H2O acts as an acid)

HCl + H2O → H3O+ + Cl− (H2O acts as a base) is given.

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Answer:

2.7

Explanation:

The equation of the reaction is

3 BaCl2 + Al2(SO4)3 = 3 BaSO4 + 2 AlCl3

So, frok the coefficients of the equation, the answer is 2.7

2.67 moles of  aluminum chloride can be produce if we have 4.0 moles of aqueous barium chloride, and we mix this with aluminum sulfate solution.

The balanced chemical reaction is :

3BaCl₂ + Al₂(SO₄)₃ ---> 3BaSO₄ + 2AlCl₃

When aqueous barium chloride is mixed with aluminum sulfate solution, a double displacement reaction occurs. The barium ions from barium chloride react with the sulfate ions from aluminum sulfate to form insoluble barium sulfate  precipitate. At the same time, the aluminum ions  from aluminum sulfate react with the chloride ions  from barium chloride to form aluminum chloride.

Given :

Number of Moles of BaCl₂ = 4.0 moles

From the balanced chemical reaction,moles of AlCl₃:

= (4.0 moles BaCl₂) (2 moles AlCl₃/3 moles BaCl₂)

= 2.67 moles AlCl₃

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The inorganic substance that has a melting point of -101°C and a boiling point of -35°C is chlorine (option A).

Melting point is the temperature at which the solid and liquid phases of a substance are in equilibrium.

On the other hand, the boiling point is the temperature at which a liquid boils, with the vapor pressure equal to the given external pressure.

Chemical elements and compounds have specific boiling and melting points that distinguishes them chemically.

The following are the melting and boiling point of the given compound and elements respectively;

Therefore, the inorganic substance that has a melting point of -101°C and a boiling point of -35°C is chlorine.

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The new temperature of the gas in Kelvin, given the data from the question is 273 °C

From the question given above, the following data were obtained:

The new temperature of the gas can be obtained by using the Charles' law equation as illustrated below:

V₁ / T₁ = V₂ / T₂

100 / 273 = 200 / T₂

Cross multiply

100 × T₂ = 273 × 200

Divide both side by 100

T₂ = (273 × 200) / 100

T₂ = 546 K

Subtract 273 to obtain answer in °C

T₂ = 546 – 273 K

T₂ = 273 °C

Thus, new temperature of the gas is 273 °C

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(a) The edge length of the unit cell is 286 pm.

(b) The  the density of aluminum metal is 1.27 x 10⁻²³ g/cm³.

The edge length of the aluminum atom is calculated as follows;

a = 2r

where;

a = 2 x 143 pm = 286 pm

V = a³

V = (286 x 10⁻¹²)³

V = 2.34 x 10⁻²⁹ m³

ρ = ZM/VN

where;

ρ = (4 x 4.479 x 10⁻²³) / ( 2.34 x 10⁻²⁹ x 6.023 x 10²³)

ρ = 1.27 x 10⁻¹⁷ g/m³

ρ = 1.27 x 10⁻¹⁷ g/m³  x (1 m³ / 10⁶ cm³)

ρ = 1.27 x 10⁻²³ g/cm³

Thus, the edge length of the unit cell is 286 pm and the  the density of aluminum metal is 1.27 x 10⁻²³ g/cm³.

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Answer: Iron

Explanation: IRON : Iron is an element with symbol Fe and atomic number 26 2) it is the fourth most common element in earth's crust 3) It is a heavy silvery grey metal belongs to the first transition series. 4) High ductility and malleability 5) It is a good conductor.

The identity of the substance is Iron.

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The answer is [OH⁻] = 1 x 10⁻⁸.

To find OH⁻, divide the ionic product of water by [H₃O⁺] as :

OH⁻ + H₃O⁺ = H₂O