Vacuoles are round organelles found in both plant and animal cells. Their primary function is to -
produce food and energy for the cell.
control the activities of the cell.
transport materials between parts of the cell.
store water, waste, and nutrients for the cell.

Answer: 1.5mol NH3

Explanation: 1N2+3H2= NH3

                      0.5 mol N2x 3NH3/1molN2= 0.5x3= 1.5mol NH3

Answer:

A .    \(\mathbf{W = 7133.2 \dfrac{ft. lb_f}{min} }\)

B.   \(\mathbf{W = 4245.24 \dfrac{ft. lb_f}{min} }\)

C.  The system is at steady state but not at equilibrium

Explanation:

Given that:

The volumetric flow rate of the water = 15 gallons per minute

The diameter of the pipe that leaves the pump is 1 inch.

A. The objective here is  to determine how much work flow is done by the water as it leaves the pump and enters the pipe

The work flow that is said to be done can  be expressed by the relation :

W = P × V

where;

P = pressure

V = volume

Also the given outlet pressure is the gauge pressure

The pressure in the pump P  is can now be expressed by the relation:

\(P_{absolute} = P_{guage} + P_{atmospheric}\)

\(P_{absolute}\) =  10 psig + 14.7 psig

\(P_{absolute}\) =  24.7 psig

W =  P × V

W =  24.7 psig  ×  15 gal/min

\(W = (24.7 \ psig * \dfrac{\frac{lb_f}{in^2}}{psig}) * ( 15 \frac{gal}{min}* \dfrac{0.1337 \ ft^3}{1 \ gal }* \dfrac{144 \ in^2}{1 \ ft^2})\)

\(\mathbf{W = 7133.2 \dfrac{ft. lb_f}{min} }\)

Thus ; the rate of flow of work is said to be done by the water at \(\mathbf{W = 7133.2 \dfrac{ft. lb_f}{min} }\)

B.

Given that :

The water returns to the pool through an opening that is 1.5 inches in diameter.

where the pressure is 1 atm.

Then ; the rate of work done  by the water as it leaves the pipe and enter the pool is as follows:

W =  P × V

W = 1 atm  ×  15 gal/min

\(W = 1 \ atm * ( 15 \frac{gal}{min}* \dfrac{0.1337 \ ft^3}{1 \ gal }* \dfrac{144 \ in^2}{1 \ ft^2})\)

\(\mathbf{W = 4245.24 \dfrac{ft. lb_f}{min} }\)

Thus ; the rate of flow of work done by the water leaving the pipe and enters into the pool is  at \(\mathbf{W = 4245.24 \dfrac{ft. lb_f}{min} }\)

C.

We can consider the system to be at steady state due to the fact that; the data given for the flow rate and pressure doesn't reflect upon the change in time in the space between the pump and the pool.

On the other-hand the integral factor why the system is not at equilibrium is that :

the pressure leaving the pipe is different from that of the water at the surface of the pool as stated in the question.

Answer:

Explanation:

Yes

The ideal gas law may be used to determine the volume of oxygen created in the electrolysis that produces 548 litres of hydrogen at STP (Standard Temperature and Pressure). PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature, according to the ideal gas equation.

The pressure is 1 atm, the temperature is 273 K, and the number of moles of hydrogen is 548/22.4 = 24.5 in this example. We may compute the volume of oxygen created by rearranging the ideal gas law: V = nRT/P = 24.5*0.082*273/1 = 483.3 litres.

As a result, the volume of oxygen created in the electrolysis at STP that produces 548 litres of hydrogen is 483.3 litres.

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The net ionic equation for the reaction between potassium sulfide and magnesium iodide is S2- + Mg2+ -> MgS, as the potassium and iodide ions are spectator ions and do not participate in the reaction.

To determine the net ionic equation for the reaction between potassium sulfide (K2S) and magnesium iodide (MgI2), we first need to identify the ions present in each compound and then determine the products formed when they react.

Potassium sulfide (K2S) dissociates into two potassium ions (K+) and one sulfide ion (S2-):

K2S -> 2K+ + S2-

Magnesium iodide (MgI2) dissociates into one magnesium ion (Mg2+) and two iodide ions (I-):

MgI2 -> Mg2+ + 2I-

Now, we need to determine the possible products when these ions combine. Since potassium (K+) has a +1 charge and iodide (I-) has a -1 charge, they can combine to form potassium iodide (KI):

K+ + I- -> KI

Similarly, magnesium (Mg2+) and sulfide (S2-) can combine to form magnesium sulfide (MgS):

Mg2+ + S2- -> MgS

Now, we can write the complete ionic equation by representing all the ions present before and after the reaction:

2K+ + S2- + Mg2+ + 2I- -> 2KI + MgS

To obtain the net ionic equation, we remove the spectator ions, which are the ions that appear on both sides of the equation and do not participate in the actual reaction. In this case, the spectator ions are the potassium ions (K+) and the iodide ions (I-).

Thus, the net ionic equation for the reaction between potassium sulfide and magnesium iodide is:

S2- + Mg2+ -> MgS

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The process of photosynthesis and cellular respiration is usually at the barest minimum when drought occurs.

This is the process in which green plants manufacture their food through the presence of light energy from the Sun.

During drought, there is no water which reduces photosynthetic activity of plants. This leads to shortage of food thereby making bears to come into town in search of food.

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The isoelectric point (pI) is the pH at which an amino acid or protein.

Functional groups of amino acids in enzymes present have the ability to readily ionize. other amino acids which have ionizable side chains. These include arginine, aspartic acid, cysteine, glutamic acid, histidine, lysine and tyrosine.

There are basically four different classes of amino acids determined by different side chains: (1) non-polar and neutral, (2) polar and neutral, (3) acidic and polar, (4) basic and polar. Principles of Polarity: The greater the electronegativity difference between atoms in a bond, the more polar the bond.

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Answer:

So, a full moon rises early in the night and sets early in the morning, it is visible all night long. Contrarily, a new moon rises early in the morning (with the sun) and sets at night (with the sun), and is not visible at night, at all.

Hope that helps!

Answer:

because

Explanation:

A new moon is visible only during a solar eclipse.They are rarely seen.

The Full Moon is visible in the sky approximately from sunset to sunrise.

In order to appear full to us on Earth, we have to see the entire day side of the moon.

That happens only when the moon is opposite the sun in our sky. So a full moon looks full because it's opposite the sun

Answer:

Molarity of sucrose = 0.116 M (Approx.)

Explanation:

Given:

Volume of solution = 0.5 liter

Mass of sucrose in gram = 20 gram

Molar mass of sucrose 342.3 g/mol

Find:

Molarity of sucrose

Computation:

Mole of sucrose = Mass of sucrose in gram / Molar mass of sucrose

Mole of sucrose = 20 / 342.3

Mole of sucrose = 0.058 (Approx.)

Molarity of sucrose = Mole of sucrose / Volume of solution

Molarity of sucrose = 0.058 / 0.5

Molarity of sucrose = 0.116 M (Approx.)

Answer:  a) \(2H_2(g)+O_2(g)\rightarrow 2H_2O(g)\)

b) 4.00 L of \(H_2O\) will be produced

Explanation:

a) The balanced chemical reaction is:

\(2H_2(g)+O_2(g)\rightarrow 2H_2O(g)\)

b) According to avogadros law, equal moles of gases occupy equal volumes at same temperature and presure conditions.

According to stoichiometry :

2 L of \(H_2\) require  = 1 L of \(O_2\)

Thus 4.00 L of \(H_2\) will require=\(\frac{1}{2}\times 4.00=2.00L\)  of \(O_2\)

Thus \(H_2\) is the limiting reagent as it limits the formation of product and \(O_2\) is the excess reagent.

As 2 L of \(H_2\) give = 2 L of \(H_2O\)

Thus 4.00 L of \(H_2\) give =\(\frac{2}{2}\times 4.00=4.00L\)  of \(H_2O\)

Thus 4.00 L of \(H_2O\) will be produced

a. The balanced reaction for the process should be 2h_2(g) + O_2(g) ⇒2H_2O(g)

b. The number of liters of water vapor should be 4.00 liters of H_2O.

a. The balanced reaction for the process should be 2h_2(g) + O_2(g) ⇒2H_2O(g)

b. As per the law, the equal moles of gases occupied equal volumes at the similar temperature

So, the number of liters should be

= 2/2*4.00

= 4.00 of H_2O

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Answer:

mark me brilliant

Explanation:

According to the balanced chemical equation, for every 3 moles of H2 consumed, 2 moles of NH3 are produced.

Therefore, to find the number of moles of NH3 produced, we need to determine the ratio of H2 to NH3 based on the balanced equation:

3 moles H2 : 2 moles NH3

If 3 moles of H2 produces 2 moles of NH3, then 2.35 moles of H2 would produce:

(2 moles NH3 / 3 moles H2) x 2.35 moles H2 = 1.57 moles NH3

So, 1.57 moles of NH3 would be produced if 2.35 moles of H2 were consumed in this reaction.

The molecular geometry of a molecule whose central atom has four single bonds and two lone pairs of electrons is square planar.

The shape of the orbitals is octahedral. Two orbitals contain lone pairs of electrons on opposite sides of the central atom. The remaining four atoms connected to the central atom give the molecule a square planar shape. If there are only two bonds and one lone pair of electrons holding the place where a bond would be then the shape becomes bent. For sp3 hybridized central atoms the only possible molecular geometry is tetrahedral. If all the bonds are in place the shape is also tetrahedral.

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The rate-determining step for the given chemical reaction is Step 2 only.

This is because the rate of a chemical reaction is determined by the slowest step in the reaction mechanism, which is called the rate-determining step. In this reaction, Step 1 is fast, meaning it occurs much more quickly than Step 2, and Step 3 is also fast, meaning it does not limit the overall rate. Therefore, Step 2 is the only step that controls the rate of the reaction.

Knowing the rate-determining step is important for understanding the kinetics of the reaction and optimizing reaction conditions to maximize the yield or selectivity of the desired products. In this case, increasing the concentration of the reactants involved in Step 2 would increase the rate of the reaction, while increasing the concentrations of the other reactants would have no effect on the rate.

Therefore, the rate-determining step for the given chemical reaction is Step 2 only.

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Answer:

you can identify the properties of an element by studying its_____ on the ... between metals and nonmetals on the periodic table are the _____ which have ...

Explanation:

Answer:

D. contains the maximum amount of solute that will dissolve in that solvent at that temperature.

Explanation:

Solubility is a term used to describe how readily a substance can be dissolved in a solvent to form a solution. Thus, a substance is said to be soluble if it dissolves completely in a solvent and insoluble if it doesn't dissolve or only dissolves partially.

For example, sodium chloride (NaCl) when mixed with water dissociates into sodium and chloride ions. Thus, salt (sodium chloride) is said to be soluble because it dissolves completely in water.

Hence, a compound that dissolves in water to produce an aqueous solution is said to be soluble in water. Also, the solute of an aqueous solution that conducts electricity is called an electrolyte.

In Chemistry, dissolution can be defined as the process of dissolving or dissociating a solute in solid, liquid or gaseous phase into fragmented particles by a solvent in order to form a solution. For dissolution to occur in solids, the crystalline structure of the substance must be broken up so as to release ions, atoms or molecules to produce a solution. For liquid and gases, the substance to be dissolved must form a non-covalent bond with the solvent to produce a solution.

Generally, a saturated solution contains the maximum amount of solute that will dissolve in that solvent at that temperature.

Answer:

35

Explanation:

the formula is: mass number = protons + neutrons

so 17+18=35

The concentration of potassium in the ECF is controlled by adjustments in the rate of active secretion along DCT of Nephron.

Extracellular fluid, a biological fluid that is not contained within cells. It is found in blood, lymph, body cavities lined with serous (hygroscopic) membranes, cavities and ducts of the brain and spinal cord, muscles and other body tissues. Extracellular fluid (ECF) volume is determined by the balance between sodium intake and renal sodium excretion. Under normal circumstances, large fluctuations in salt intake lead to parallel changes in renal salt excretion such that ECF volume is kept within tight limits.

The main function of the extracellular fluid is that of an exchange medium. The ECF allows cells to exchange dissolved gases, nutrients, and electrolytes between the cell and the rest of the body to create homeostasis.

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Concentration of potassium in the ECF is controlled by adjustments in the rate of active secretion __________.

- along distal convoluted tubule of nephron

- in proximal convoluted tubule of nephron

- in nephron loop

- in glomerulus

A precipitate is an insoluble solute formed in a solution. No precipitate will form when magnesium acetate and strontium chloride react as they produce a soluble salt.

A precipitate is an insoluble particle that is formed when the ionic compounds react to produce insoluble salt.

Reaction when magnesium acetate and strontium chloride reacts is shown as:

Mg(CH₃COO)₂ (aq) +SrCl (aq) → MgCl₂ (aq) +Sr(CH₃COO)₂ (aq)

The substance containing acetate in the compound is always soluble and hence cannot make precipitate. Also, chloride gets soluble with magnesium.

Therefore, no precipitate will be formed.

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The claim that cold water boils faster than hot water is not true. The reason why this misconception may have emerged is likely due to a misunderstanding or misinterpretation of certain observations. However, there is no scientific evidence supporting this claim.

One possible reason for this misconception is the notion that hot water takes longer to reach its boiling point because it starts at a higher temperature. When comparing hot and cold water in terms of reaching the boiling point from room temperature, the cold water may appear to boil faster.

However, this is simply because the hot water has already gained a head start in terms of temperature. In reality, once both liquids reach their respective boiling points, the hot water will boil first.

Scientifically, the boiling point of water is determined by its temperature and pressure. Under normal atmospheric conditions, the boiling point of water is 100 degrees Celsius (212 degrees Fahrenheit). Heating water raises its temperature, and once it reaches 100 degrees Celsius, it transitions into the gaseous state. The initial temperature of the water does not affect the boiling point itself.

In conclusion, the claim that cold water boils faster than hot water is a misconception. It likely arose from a misinterpretation of observations, and there is no scientific evidence to support this claim. The boiling point of water is solely determined by its temperature and pressure, regardless of whether the water is initially hot or cold.

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The vapor pressure of the SiCl₄ in the mmHg at the 33.0 °C is the 312 mmHg.

The Clausius - Clapeyron equation is as :

ln ( P₂ / P₁ ) = ΔHvap / R ( 1 / T₁ - 1 / T₂ )

P₂ = P₁eˣ

Where,

The temperature, T₁  = 5.4 °C = 278.55 K

The temperature, T₂  = 33.0 °C= 306 K

The pressure, P₁ = 100 mmHg

ΔHvap is the heat of the vaporization = 30.2 kJ /mol = 30200 J/mol

The gas constant, R = 8.314 J / mol K

x = ΔHvap / R ( 1 / T₁ - 1 / T₂ )

x = 30200 / 8.314 ( 1/ 278.55 - 1/ 306 )

x = 1.05

P₂ = 100 \(e^{1.05}\)

P₂ = 312 mmHg

The vapor pressure of the  SiCl₄ is 312 mmHg.

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Answer: multiple choice

Q1: Empty Space

Q2: protons and neutrons

Q3: A

Q4:C

Q5:A

Explanation:

Answer:

warm

Explanation:

0.02314 moles of  NO₂ can be formed from the decomposition of 1.25 g of dinitrogen pentoxide.

The balanced equation for the decomposition of dinitrogen pentoxide is:

2 N₂O₅ → 4 NO₂ + O₂

The molar mass of N₂O₅  is 108.01 g/mol.

To determine the number of moles of N₂O₅  present in 1.25 g, we use the following calculation:

moles N₂O₅  = mass / molar mass

moles N₂O₅ = 1.25 g / 108.01 g/mol

moles N₂O₅ = 0.01157 mol

From the balanced equation, we can see that 2 moles of N₂O₅  decompose to form 4 moles of NO2. Therefore, the number of moles of NO2 produced can be calculated as:

moles  NO₂ = (0.01157 mol N2O5) × (4 mol NO2 / 2 mol N2O5)

moles  NO₂ = 0.02314 mol

Therefore, 0.02314 moles of  NO₂ can be formed from the decomposition of 1.25 g of dinitrogen pentoxide.

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Both are soluble because they are polar molecules as the water is a polar molecule too, so when they share that feature, they are soluble in water. You can realize that these compounds are ionic, and remember the properties of ionic compounds: all ionic compounds are soluble in water.

Answer:

CH4O

Explanation:

Empirical formula of a compound represents the smallest whole number ratio of its constituent elements.

To find the empirical formula, we say:

37.48% C = 37.48g of Carbon

12.58% H = 12.58g of Hydrogen

49.93% O = 49.93g of Oxygen

We convert each mass to mole by dividing by their respective atomic mass.

C=12g/mol, H=1g/mol, O=16g/mol

C = 37.48/12 = 3.123mol

H = 12.58/1= 12.58mol

O = 49.93/16 = 3.121mol

Next, we divide each mole value by the smallest (3.121mol)

C = 3.123/3.121 = 1.0006

H = 12.58/3.121 = 4.03

O = 3.121/3.121 = 1

Approximately, the empirical formula of

CHO is in ratio 1:4:1

Hence, CH4O is the empirical formula

Answer:

K2S dissociates into three particles in aqueous solution: 2 K+ ions and 1 S2- ion.

Answer:

10.0 g C12H22O11 (mol/342.34 g) (1/0.500 L) = 0.06 M C12H22O11 => 1 sig.

Explanation:

According to molar concentration,0.00876 liter of 0.500 M sucrose contain 1.5 kg of sucrose.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.

Volume is obtained by using molar concentration formula, 0.500×342.3/1.5×10³=114.1×10\(^-3\)=1/V

Thus,volume=1/114.1×10\(^-3\)=0.00876 M.

Thus, the volume of sucrose solution is 0.00876 M.

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Answer:

10 millimeters

Explanation:

hope it helps