An aqueous feed solution of 1000 kg/h containing 23.5 wt % acetone and 76.5 wt % water is being extracted in a countercurrent multistage extraction system using pure methylisobutyl ketone solvent at 298–299 k. the outlet water raffinate will contain 2.5 wt % acetone. use equilibrium data from

Answer:

Temperature variance at Redding > > Temperature variance beside at Eureka

Monthly temperatures at Redding are generally higher than the monthly temperatures beside the ocean at Eureka

Explanation:

Month             January

Eureka                Eureka          Redding      Redding

Average              Average          Average       Average

High                     Low                 High             Low

54°F                     41°F                   55°F              35°F

February

55°F                     43°F                  58°F              38°F

March

55°F                     43°F                   70°F          41°F

April

56°F                     45°F                   71°F          45°F

May

58°F                    48°F                    80°F         52°F

June

60°F                     51°F                     89°F         60°F

July

61°F                      52°F                      98°F         64°F

August

62°F                      53°F                      97°F         61°F

September

63°F                     51°F                         89°F          56°F

October

61°F                      49°F                        69°F         45°F

November

58°F                     45°F                        60°F         40°F

December

55°F                     42°F                        55°F           34°F

58                          46.92                  74.25            47.58        Mean

3.16                        4.25                     15.99            10.63         Standard Dev

9.97                       14.08                    255.84         112.992      Variance

63                           53                         98                64              Max  

54                           41                          55                34              Min

Based on the climate data that Sarah and Ruby collect, they can conclude that

From the data we have

From the data it is observed that the temperatures beside the ocean in Eureka are lesser than and more stable (vary less) than the temperatures in Redding, also the temperatures in Redding are much higher than the temperatures beside the ocean in Eureka.

Non electrolytes are Pentacarbon decahydride, Phosphorus pentachloride, Glucose.

Explanation:

Non electrolytes do not exist as ions in aqueous solution. Since it does not get dissociated into ions, these non electrolytes do not conduct electricity when it is dissolved or it is heated or melted.

Pentacarbon decahydride is a non electrolyte.

Magnesium chloride is an electrolyte.

Copper phosphate is an electrolyte

Sulfur trioxide is an electrolyte.

Aluminum oxide is an electrolyte

Phosphorus pentachloride do not get dissociated into its ions so it is a non-electrolyte.

Glucose gets dissolved in water but do not dissociate into ions, so it is a non electrolyte.

Answer:

The air in our atmosphere is composed of molecules of different gases. ... While the composition doesn't change much as you travel up through the lower layers of the atmosphere, what does change is the number of molecules. As you travel higher, the air molecules become less plentiful.

Explanation:

Answer:

C) in a mixture of gases suck as air, the total pressure is the sum of the individual partial pressure of the gasses in the mixture

Dalton's law, or the law of partial pressures, states that in a mixture of gases, the total pressure is the sum of the individual partial pressures of the gases in the mixture.

The correct answer to the question regarding Dalton's law is that, C) in a mixture of gases such as air, the total pressure is the sum of the individual partial pressures of the gases in the mixture. This is because Dalton's law, also referred to as Dalton's law of partial pressures, states that the total pressure exerted by a mixture of gases is the sum of the partial pressures of each individual gas in the mixture.

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The concentrations of reactants and the products are not constant and the rates of the forward and reverse reactions are equal. and these reactions are not at equilibrium.

Explanation:

The conditions to attain equilibrium is that,

So the answer is The concentrations of reactants and the products are not constant and the rates of the forward and reverse reactions are equal.

A system is at equilibrium when the rates of forward and reverse reactions are equal and the concentrations of reactants and products are constant. Thus, any changes in concentrations or reaction rates indicate that the system is not at equilibrium.

Based on Chemical Equilibrium principles, a system is at equilibrium when the rates of the forward and reverse reactions are equal, and the concentrations of reactants and products are constant. Therefore, if the concentrations of the reactants and the products are not constant, the system is not at equilibrium. Similarly, if there is a condition where the rate of the forward or reverse reaction does not change, the system is also not at equilibrium.

This means that even if the forward and reverse reaction rates are equal, but the concentrations are still fluctuating, the system hasn't reached equilibrium yet. So changes in the concentrations of the reactants or products indicate that the system is not in equilibrium. These principles form the basis of the Le Châtelier's principle.

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Answer:

500 calories

Explanation:

Heat gained or lost is mass times specific heat times change in temperature. Using this formula, the answer is 500 calories.

Answer:

Most common oxidation state of the chalcogens is -2, most common oxidation state of the halogens is -1.

Explanation:

For atomic radii, the chalcogens have a larger atomic radii than the halogens

This is because atomic radii decreases across the period due to increase in nuclear charge.

For ionic radii the chalcogens also have larger ionic radii than the halogens. This is because the chalcogens always carry a -2 charge compared to halogens that carry a -1 charge. Since -2 is the most common oxidation state for chalcogens and -1 is the most common oxidation state for the halogens.

In terms of oxidation states, the halogens show a higher value of common oxidation state -1 while for chalcogens is -2 even though +2, +4 and +6 oxidation states are also well known.

First ionization energy of halogens is greater than that of the chalcogens due to greater effective nuclear charge.

The second ionization energy of chalcogens is greater than that of the halogens.

Chalcogens have −2, +2, +4, and +6 whereas halogens have −1, +1, +3, +5, and +7 oxidation state.

The most common oxidation states of the elements of chalcogens are −2, +2, +4, and +6 while on the other hand,  the oxidation states of halogens such as fluorine, chlorine, bromine, and iodine are −1, +1, +3, +5, and +7. The chalcogens have larger atomic as well as ionic radii as compared to halogens because of the presence of less number of electrons in the outermost shell.

We know that when we moves from left to right in the periodic table, atomic radius decreases due to addition of extra electrons in the outermost shell. The attraction of nucleus on the additional electron increases which leads to movement of outermost shell nearer to nucleus.

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Answer:

Mass of Mg(OH)₂ required for the reaction = 863.13 g

Explanation:

3Mg(OH)₂ + 2H₃PO₄ -------> Mg₃(PO₄)₂ + 6H₂O

(5.943 x 10²⁴) molecules of H₃PO₄ is available fore reaction. Mass of Mg(OH)₂ required for reaction.

According to Avogadro's theory, 1 mole of all substances contain (6.022 × 10²³) molecules.

This can allow us find the number of moles that (5.943 x 10²⁴) molecules of H₃PO₄ represents.

1 mole = (6.022 × 10²³) molecules.

x mole = (5.943 x 10²⁴) molecules

x = (5.943 x 10²⁴) ÷ (6.022 × 10²³)

x = 9.87 moles

From the stoichiometric balance of the reaction,

2 moles of H₃PO₄ reacts with 3 moles of Mg(OH)₂

9.87 moles of H₃PO₄ will react with y moles of Mg(OH)₂

y = (3×9.87)/2 = 14.80 moles

So, 14.8 moles of Mg(OH)₂ is required for this reaction. We them convert this to mass

Mass = (number of moles) × Molar mass

Molar mass of Mg(OH)₂ = 58.3197 g/mol

Mass of Mg(OH)₂ required for the reaction

= 14.8 × 58.3197 = 863.13 g

Hope this Helps!!!

Answer:

5.943 × 10²⁴ molecules of H₃PO₄ will react with 789.29 grams of  Mg(OH)₂

Explanation:

Here we have

5.943 × 10²⁴ molecules of H₃PO₄ in a reaction with Mg(OH)₂

as follows

3Mg(OH)₂ + 2H₃PO₄ → Mg₃(PO₄)₂ + 6H₂O

Therefore 3 moles of Mg(OH)₂ react with 2 moles of H₃PO₄ to form 1 mole of Mg₃(PO₄)₂ and 6 moles of H₂O

5.943 × 10²⁴ molecules of H₃PO₄ which is equivalent to [tex]\frac{5.943 \times 10^{24}}{6.02 \times 10^{23}} moles = 9.869 \, moles \, of \, H_3PO_4[/tex]

Will react with 3/2×9.869 moles or 14.8 moles of Mg(OH)₂

One mole of Mg(OH)₂ weighs 58.3197 g/mol

Therefore, 5.943 × 10²⁴ molecules of H₃PO₄ will react with 14.8×58.3197 g or 789.29 grams of  Mg(OH)₂.

Answer:

C= 0.532M

Explanation:

The equation of reaction is

H2SO4 + 2KOH = K2SO4+ H2O

nA= 1, nB= 2, CA= ?, VA= 48.9ml, CB= 1.5M, VB= 34.7ml

Applying

CAVA/CBVB = nA/nB

(CA× 48.9)/(1.5×34.7)= 1/2

Simplify

CA= 0.532M

The question relates to the ideal gas law in chemistry, which connects the pressure, volume, temperature, and number of moles of hydrogen gas in a given scenario.

The student's question involves a sample of hydrogen gas (H2), which is placed in a 0.500 L container at a temperature of 295 K with a pressure of 1.442 bar. This scenario typically deals with concepts such as gas laws and molar calculations from chemistry, specifically the ideal gas law, which relates the pressure, volume, temperature, and number of moles of a gas.

To solve problems like this, one would normally use the ideal gas law equation: PV = nRT. However, without the number of moles or the specific R constant provided, one cannot calculate the moles directly. Additional information or a different question that involves changing conditions where the ideal gas law can be applied might be necessary.

Answer:5000 s^-1

Explanation: Solution=

Using the formulae----> Kcat=Vmax/Et

where

Vmax is the maximum rate of the reaction when all the enzymes are saturated.

Vmax= 6.5 mmoles/s

Et=1.3 uM

1 mmole= 1000 umole

Changing to micromoles/sec, gives=

Vmax=   6.5 mmoles/s \times 1000= 6500 micromoles/s

Bringng back the equation,  

----->Kcat= Vmax/Et

= 6500/1.3

= 5000 /s

Therefore, our answer  is 5000 s^-1

Answer:

Explanation:i joule is equal to 0.238902957619 calories so 1251 joules is equal to 298.87 calories divided by 25.0 degrees centigrade is equal to 11.95 calories divided by the 35.2 gram sample weight to get the calories per gram per degree centigrade would come to 0.3396 calories/gram degree centigrade. Presumably this, if correct, could be used to obtain the metal in question by consulting a chart or table with specific heats of various metals because they should always be the same specific heat for each metal.

Answer:

Explanation:

A nonpolar covalent bond is created when atoms share their electrons equally.

Polar covalent bond is created when atoms share their electrons unequally.

Final answer:

Natural selection requires genetic variation within a population and environmental pressures that select for certain traits, leading to changes in the population's genetic makeup over generations.

Explanation:

For natural selection to take place in a population, two essential conditions must exist: genetic variation among individuals and environmental pressures that favor certain traits over others. Genetic variation ensures that there are differences in traits among individuals, which may be advantageous or not depending on the environmental context. These traits must have a genetic basis so that they can be inherited by the next generation.

Environmental pressures, such as climate change, predation, availability of resources, and competition, then determine which of these traits are beneficial, leading to the greater reproductive success of individuals with those traits, thus altering the genetic makeup of the population over time.

Answer:

1. The salt bridge completes the circuit of the voltaic cell to allow the flow of current

2. The porous divider performs the function of a salt bridge, hence a salt bridge is unnecessary in a single-beaker voltaic cell

Explanation:

1. The oxidation and reduction half cells of a voltaic cell are connected by the salt bridge in other to ensure that the internal circuit is electrically neutral, to avoid the rapid reaction to reach equilibrium conditions which affects results in preventing voltage drop in the voltaic cell.

The salt bridge also aids in charge accumulation

2. In a single-beaker voltaic cell with the compartments separated by a porous divider, the function of the porous divider is the same as that of the salt bridge, hence the salt bridge is unnecessary.

Answer:

Explanation:

A salt bridge is a strong electrolytes and it's ion like KNO3,Consider a voltaic cell with two paths the anode half cell and the cathode half cell,it will be observed that when the cell is connected,electrons leaves through the wire from the anode which is subject to oxidation hence producing both electrons and positive ions in the anode,if more of the electrons leaves the anode,need arises to to ensure electrochemical neutrality in the cell,this is we're the salt bridge is much important because it provides the needed negative ions to counter balance the effect of this,also a reversed process occurs in the second half Cathodoc cell.

Also for a simply voltaic cell separated by a porous membrane the salt bridge is not needed because unlike the half cell connected by a salt bridge the porous membrane servea as a media of exchange of ions for the cells.

The initial temperature of the zinc metal is  720 ° C

Explanation:

Given data,

Zn

m=2.50 g            

C=0.390 J/g° C

ΔT= (22.50° C- Ti)

H2O

m= 65.0 g

C= 4.184 J/ g° C

ΔT = 2.50° C

We have the formula,

qH20= - qZn

(65.0 g) (4.184 J/ g° C) (ΔT 2.50° C)=(2.50 g) ( 0.390 J/g° C) (ΔT 22.50° C- Ti)

solving the equation we get,

697.3 ° C=- 22.50 ° C+Ti

Ti= 720 ° C

The initial temperature of the zinc metal is  720 ° C

Answer:

1. Limiting reactant.

2. Product.

3. Theoretical yield.

4. Reactants.

5. Actual yield

Explanation:

1. The limiting reactant. The limiting reactant is the reagent that is completely up in the reaction.

2. Product. Product is the result obtained From a reaction and the amount of product formed is determined by the limiting reactant

3. Theoretical yield. This is the result obtained from the stoichiometry calculations.

4. Reactant. Reactant are the starting material for a chemical reaction. The amount of the reactants determines the theoretical yield (products)

5. Actual yield. This is the result obtained from the experiment carried out in the laboratory.

Answer:

Liquid drain cleaner: Base

Milk: Acid

Explanation:

Would make sense to see this on the pH scale where anything above 7 is basic and below 7 is acidic.

The identification of each substance treated as an acid or substance should be Liquid drain cleaner: Base and Milk: Acid

Acid should be treated as the hydrogen that contained the substance where the proton should be donated to the other substance. While on the other hand, the base represent the molecule for accepting the hydrogen ion from an acid. Also if the pH scale should be above 7 so it should be treated base while below should be treated as the acid.

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Given its lack of a definite crystal structure, Marcie's shiny rock is likely a rock, not a mineral. Rocks are comprised of various minerals and other materials, which results in a less distinct structure compared to minerals.

Marcie's shiny rock is likely a rock, given its description. Rocks and minerals, while sharing some characteristics, have key differences. Both rocks and minerals are solid, naturally occurring substances. However, minerals, besides having a definite chemical composition, also possess a specific crystal structure. By confirming that Marcie's shiny rock does not have a definite crystal structure, it's safer to categorize it as a rock. Rocks are comprised of different minerals as well as other elements, making them less uniform than minerals. Rocks range from three basic types: igneous (from molten rock or lava), sedimentary (from the deposition and sedimentation of organic or inorganic particles), and metamorphic rock (undergone chemical alteration under high temperature and pressure).

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Marcie's rock is likely a rock, not a mineral, due to its lack of a definite crystalline structure. Although certain rocks with metallic content can be extraterrestrial, no indication is given to suggest this. The rock could be classified as metamorphic, sedimentary, or igneous, depending on its formation process.

Marcie's shiny rock, being solid, naturally occurring, and possessing a definite chemical composition, meets most criteria to be termed a mineral. However, a key aspect of a mineral is that it exhibits a definite crystalline structure, which her rock does not. Hence, it would better be described as a rock. Rocks can be an amalgamation of different minerals and do not require a specific crystalline structure to classify.

The identified characteristics of the rock, however, do not necessarily mean it is extraterrestrial in origin, as the provided references might suggest. While it is true that the irons and stony-irons with metallic content can be extraterrestrial, there is no indication given that Marcie's rock is metallic or contains iron. Therefore, it is unlikely a meteorite. It may require a laboratory analysis to confirm this.

It may be a metamorphic, sedimentary, or igneous rock, which are categories based on their geologic formation processes. Metamorphic rocks undergo physical and chemical alteration under high temperature and pressure, sedimentary rocks are formed from the sedimentation of particles, and igneous rocks originate from the solidification of magma or lava.

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Answer:

Explanation:

The blue whale is the largest animal on Earth. The length of a blue whale is about 25 m, although is is said the largest confirmed measure is 29.9m.

The tiny frogs measure about 10mm.

You can estimate the number of tiny frogs that have the same length as a blue whale dividing the approximate average length of a blue whale by the approximate average length of the tiny frogs.

First convert 25m to mm:

Now, divide:

Hence, about 2,500 tiny frogs sitting next to each other would measure the same length as a blue whale.

Answer:

LOOK BELOW

Explanation:

Well a female is 82ft and a male is 79ft so we will just go with both answers. A tiny frog is about a estimate length of 0.27 inches so you would have to divide and or multiply 82 by 0.27 getting your first length then do the same with teh next one and thats you answer! hope i helped bby :3

Answer:

C3H6O

Explanation:

Data obtained from the question. This includes:

Carbon (C) = 0.62069 g

Hydrogen (H) = 0.103448 g

Oxygen (O) = 0.275862 g

The empirical formula can be obtained as follow:

Step 1:

Divide by their molar mass.

C = 0.62069 / 12 = 0.0517

H = 0.103448 / 1 = 0.103448

O = 0.275862 / 16 = 0.0172

Step 2:

Divide by the smallest number.

C = 0.0517 / 0.0172 = 3

H = 0.103448 / 0.0172 = 6

O = 0.0172 / 0.0172 = 1

Step 3:

Writing the empirical formula.

The empirical formula is C3H6O

Answer:

The empirical formula is C3H6O

Explanation:

Step 1: Data given

A sample of ethyl butyrate contains:

0.62069 g of carbon

0.103448 g of hydrogen

0.275862 g of oxygen

Atomic mass of carbon = 12.01 g/mol

Atomic mass of hydrogen = 1.01 g/mol

Atomic mass of oxygen = 16.0 g/mol

Step 2: Calculate moles

Moles = mass / molar mass

Moles carbon = 0.62069 grams / 12.01 g/mol

Moles carbon = 0.0517 moles

Moles hydrogen = 0.103448 grams / 1.01 g/mol

Moles hydrogen = 0.1024 moles

Moles oxygen = 0.275862 grams / 16.0 g/mol

Moles oxygen = 0.0172 moles

Step 3: Calculate the mol ratio

We divide by the smalllest amount of moles

C: 0.0517 moles / 0.0172 moles = 3

H: 0.1024 moles / 0.0172 moles = 6

O: 0.0172 moles / 0.0172 moles = 1

The empirical formula is C3H6O

Answer:

Limiting factors are resources or other factors in the environment that can lower the population growth rate. Limiting factors include a low food supply and lack of space. Limiting factors can lower birth rates, increase death rates, or lead to emigration.

Explanation:

Answer:

Invasive species, runoff pollution, and climate change.

Explanation:

Invasive species, such as Burmese pythons, threaten the Florida Everglades because they are not native to the natural habitat. Pythons eat the native animals, but they don't have any predators.

Pollution from nearby farms and roads enters the water and damages the ecosystem of the Everglades and Louisiana wetlands. Toxic chemicals lead to detrimental effects for both humans and wildlife.

Humans have drained swampy areas to allow for development. However, this has led to the Everglades drying up and even burning in recent years.

Answer:

A compound is different from elements in that it is made from the chemical union of two or more elements. ... Mixtures are different from compounds in that they are easily separated. A magnet could be used to separate the iron from the sulfur, because iron is attracted to magnets, while sulfur is not.

Explanation:

Answer:

they are characterized as a group by having 3 electrons in the outermost parts of their atomic structure. boron the lighter of these elements

Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore the volume of N[tex]_2[/tex] will be made according to the equation is 2.64l.

Ideal gas equation is the mathematical expression that relates pressure volume and temperature. Ideal gas is a hypothetical gas. Vanderwaal gas can behave as ideal gas at low pressure and high temperature.

Mathematically,

PV=nRT

where,

P = pressure= 2.3atm

V= volume=?

n =number of moles=85.0/65.01

                               =1.30moles

T =temperature=348K

R = Gas constant = 0.0821 L.atm/K.mol

Substituting all the given values in the above equation, we get

2.3 × V=1.30× 0.0821 L.atm/K.mol × 348 K

V=1.76l

volume of nitrogen = 3/2× 1.76l=2.64l

Therefore the volume of N[tex]_2[/tex] will be made according to the equation is 2.64l.

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To calculate the volume of nitrogen gas produced from the decomposition of NaN3 at a given temperature and pressure, we must apply the stoichiometry from the balanced chemical equation and use the ideal gas law formula.

The student's question involves determining the volume of nitrogen gas (N2) produced from the decomposition of sodium azide (NaN3) under specified conditions of temperature (75 degrees Celsius) and pressure (2.3 atm). To solve this, one must use the ideal gas law, PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature in Kelvin. The first step is to calculate the moles of N2 that can be produced from 85.0 grams of NaN3 using the stoichiometry of the given balanced equation.

Firstly, one needs to find the molar mass of NaN3 to convert grams to moles. Then, apply the stoichiometry from the balanced equation (2 mol NaN3 produces 3 mol N2). Finally, using the calculated number of moles of N2, apply the ideal gas law to find the volume of nitrogen gas at the given temperature and pressure.