The value of the equilibrium constant for the reaction 2NO₂(g) ⇄ N₂O₄(g) is 0.133, meaning that the reaction favors the formation of N₂O₄(g) at equilibrium.
The equilibrium constant, denoted as K, is a measure of the extent to which a reaction proceeds towards products. It is expressed as the ratio of the concentrations of products to reactants, each raised to their stoichiometric coefficients. In this case, the balanced equation for the reaction is 2NO₂(g) ⇄ N₂O₄(g).
At equilibrium, the vessel contains 10.0g of NO₂(g) and 0.55g of N₂O₄(g). To calculate the equilibrium constant, we need to determine the molar concentrations of the two gases. To do this, we use the ideal gas law to convert the masses of the gases to moles, and then divide by the volume of the vessel in liters.
The molar concentrations at equilibrium are [NO₂] = 0.42 M and [N₂O₄] = 0.023 M. Substituting these values into the equilibrium constant expression, we get:
K = ([N₂O₄]/[NO₂]²) = (0.023)/(0.42)² = 0.133
Therefore, the value of the equilibrium constant for the reaction 2NO₂(g) ⇄ N₂O₄(g) is 0.133. This indicates that the reaction favors the formation of N₂O₄(g) at equilibrium, as the concentration of N₂O₄(g) is much lower than that of NO₂(g).
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2 equations both begin with Uranium-235 and one neutron, but many different elements are produced. Knowing the starting elements, can one predict what elements will form as a result of a given reaction?
We can estimate the probabilities of forming certain elements based on fission product yield distributions while it is not possible to precisely predict the elements that will form from a specific U-235 fission reaction with one neutron.
When a Uranium-235 atom (U-235) absorbs a neutron, it undergoes nuclear fission, which is a process where the nucleus splits into smaller nuclei, releasing energy and additional neutrons. The resulting elements formed from this reaction are called fission products.
Predicting the exact elements that will be formed from a specific fission reaction involving U-235 and one neutron is not straightforward. This is because the fission process is probabilistic, meaning the formation of specific elements is based on probabilities, not certainties.
However, scientists have identified certain fission product yield distributions, which give an idea of the likelihood of forming specific elements from the fission of U-235. These yield distributions are obtained through experimental data and theoretical models.
In summary, while it is not possible to precisely predict the elements that will form from a specific U-235 fission reaction with one neutron, we can estimate the probabilities of forming certain elements based on fission product yield distributions.
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what is lithium atomic number
Chemical element lithium has the symbol Li and atomic number 3. Lithium is a solid at normal temperature and is categorised as an alkali metal.
Lithium SourcesIt is mixed and found in small units in almost all igneous rocks as well as numerous mineral springs; it does not naturally occur in nature. The more significant minerals that include it are amblygonite, petalite, spodumene, and lepidolite.
Currently, brines from Searles Lake in California and those in Nevada are being used to extract lithium. North Carolina is home to significant quadramene reserves. The fused chloride is used to electrolytically generate the metal. Similar to Na, K, and other members of the alkali metal class, lithium has a silvery look. Compared to sodium, it doesn't react with water as quickly. Lithium gives a flame a lovely crimson hue, but as the metal burns vigorously, the light turns brilliant white.
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Krypton has an atomic number of 36 and a mass number of 84. Which statement describes a neutral
atom of krypton? (1 point)
O
It has the same number of protons as neutrons, but it has a greater number of
electrons.
It has the same number of protons as electrons, but it has a lesser number of
neutrons.
It has the same number of protons as electrons, but it has a greater number of
neutrons.
O
It has the same number of protons as neutrons, but it has a lesser number of
electrons.
Answer:
It has the same number of protons as electrons, but it has a greater number of
neutrons.
Explanation:
Atomic mass= number of proton + no. of neutron
If the number of proton is 36 and mass is 84, let's find it;
Atomic mass= number of proton + no. of neutron
84=36+no. of neutron
84-36= no. of neutron
48= no. of neutron
we can see, that no. of neutron is greater than no. of proton
a fossil contains c14 and n14 in the ratio of 1:3 how old is the bone
Answer:
Approximately 11460 Years Old
Explanation:
i looked this up :/
way to much maths for me
The age of the bone given that it contains C-14 and N-14 in ratio of 1:3 is 11460 years
How to determine the percentage remainingC-14 is usually used for radioactive dating (i.e to determine the aga of substance)
From the question, C-14 and N-14 exist in ratio of 1:3.
thus, the amount of C-14 remaining can be obtained as follow:
Ratio of C-14 = 1Ratio of N-14 = 3Total ratio = 1 + 3 = 4Percentage of C-14 remaining =?Percentage of C-14 remaining = 1/4 × 100
Percentage of C-14 remaining = 25%
How to determine the number of half-lives that has elapsedOriginal amount (N₀) = 100%Amount remaining (N) = 25%Number of half-lives (n) =?2ⁿ = N₀ / N
2ⁿ = 100 / 25
2ⁿ = 4
2ⁿ = 2²
n = 2
How to determine the ageHalf-life of C-14 (t½) = 5730 yearsNumber of half-lives (n) = 2Time (t) = ?t = n × t½
t = 2 × 5730
t = 11460 years
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What is the element that lies in group no 29?
3.Which of the following isotopes should be expected to be radioactive?Select one:a. Ab. Bc. Cd. D
Explanation:
To find the isotope that is expected to be radioactive we have to compare the given isotopes with the ones that we find the in the periodic table.
(A) Ti:
Isotope ----> atomic mass = 48 atomic number = 22
Periodic table ---> average atomic mass = 47.9 atomic number = 22
(B) Sr:
Isotope ----> atomic mass = 88 atomic number = 38
Periodic table ---> average atomic mass = 87.6 atomic number = 38
(C) Os:
Isotope ----> atomic mass = 192 atomic number = 76
Periodic table ---> average atomic mass = 190.2 atomic number = 76
(D) Pu:
Isotope ----> atomic mass = 244 atomic number = 94
Periodic table ---> average atomic mass = 244 atomic number = 94
If we take a look at them we will see that the only one that is different is osmium. The atomic mass of the isotope is 192 amu, that means that this isotope has 2 more neutrons than the average atom of the element. So we can expect that it could be radioactive.
Answer: C. Os
which represents a linear graph?
Answer:
The 2nd one
Explanation:
Which of the following is the equation for wave speed?
Answer:
\({ \boxed{ \mathfrak{ \: answer : \: { \bf{v = f \lambda}} }}}\)
v is the wave speedf is frequencylambda is wave lengthexplain what you understand by valency, give examples
Answer:
Valency is defined as the number of hydrogen atoms which combine directly or indirectly with one atom of an element.
Example:
One atom of nitrogen combines with three atoms of hydrogen to form ammonia gas. So, the valency of nitrogen is 3.
A disadvantage of disposing of waste polymers through _____ is that they must first be separated, which can be expensive. What is the missing word in this sentence?
A disadvantage of disposing of waste polymers through recycling is that
they must first be separated.
Recycling is the process of forming new polymers and compounds as against their disposal .
Recycling involves separating the items into various sections such as paper,
plastic , metal etc. This is because they both undergo different recycling
processes.
The disadvantage of this process is that it's time consuming and also
expensive as a great amount of time and man power is needed to
separate the waste items.
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4. Sketch and label an atom of carbon (atomic number −6, atomic weight −12 ), indicating the location of each of the particles listed above. b. What is the net charge of the above atom?
Carbon atom is electrically neutral. Therefore, there is no net charge on the Carbon atom. Thus, the net charge of the above atom is zero.
4. Sketch and label an atom of carbon (atomic number −6, atomic weight −12), indicating the location of each of the particles listed above.The diagram of the Carbon atom is shown below, which consists of 6 protons, 6 neutrons and 6 electrons in their respective orbits.According to Rutherford’s model of an atom, electrons revolve around the nucleus in specific energy levels or orbits. An electron has a negative charge while the proton has a positive charge. The neutron does not carry any charge. The electrons orbit around the nucleus with the help of centripetal force between the nucleus and electrons.The number of protons in an atom decides the identity of an element. It is represented by the atomic number of the element. As given, the atomic number of Carbon is 6. Atomic weight of Carbon is the sum of protons and neutrons in the nucleus which is 12. Therefore, Carbon has 6 neutrons in its nucleus.Net Charge on the Carbon atom: The atomic number of Carbon is 6, which means it has 6 electrons orbiting around the nucleus. And the number of protons in the nucleus is also 6, which is equal to the number of electrons present. Carbon atom is electrically neutral. Therefore, there is no net charge on the Carbon atom. Thus, the net charge of the above atom is zero.
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12. Switch out the fluorescent bulb with the regular bulb and observe the energy output.
What do you notice about the difference in the energy and output of these two bulbs?
The fluorescent bulb has a better energy output than the regular bulb.
What is the difference between the energy output of the fluorescent and the regular bulb?The main difference between the energy output of a fluorescent bulb and a regular (incandescent) bulb is their efficiency. Fluorescent bulbs are much more energy-efficient than incandescent bulbs because they convert a much higher proportion of the energy they consume into visible light, rather than heat.
Incandescent bulbs work by heating a filament inside the bulb until it glows, emitting light. However, this process is very inefficient, with most of the energy consumed being lost as heat. In contrast, fluorescent bulbs use a small amount of energy to excite a gas inside the bulb, which then emits ultraviolet (UV) light.
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6.58 grams of sulfur trioxide and 16.4 grams of water react to form H2SO4. identify the limiting reagent and the excess. how many grams of the excess is left over .
what mass of sulfuric acid is produced?
1. The limiting reagent is sulfur trioxide, SO₃ and the excess reagent is water, H₂O
2. The mass of the excess reagent leftover is 14.92 g
3. The mass of sulfuric acid, H₂SO₄ is produced is 8.06 g
1. How do i determine the limiting and the excess reagent?The limiting and excess reagent can be obtained as follow:
SO₃ + H₂O -> H₂SO₄
Molar mass of SO₃ = 80 g/molMass of SO₃ from the balanced equation = 1 × 80 = 80 g Molar mass of H₂O = 18 g/molMass of H₂O from the balanced equation = 1 × 18 = 18 gFrom the balanced equation above,
80 g of SO₃ reacted with 18 g of H₂O
Therefore,
6.58 g of SO₃ will react with = (6.58 × 18) / 80 = 1.48 g of H₂O
From the above calculation, we can see that only 1.48 g of H₂O out of 16.4 g is needed to react completely with 6.58 g SO₃.
Thus, the limiting reagent is SO₃ and the excess reagent is H₂O
2. How do i determine the mass of the excess reagent leftover?The mass of the excess reagent leftover can be obtained as follow:
Mass of excess reagent, H₂O given = 16.4 gMass of excess reagent, H₂O that reacted = 1.48 gMass of excess reagent, H₂O leftover =?Mass of excess reagent, H₂O leftover = Mass given - mass reacted
Mass of excess reagent, H₂O leftover = 16.4 - 1.48
Mass of excess reagent, H₂O leftover = 14.92 g
3. How do i determine the mass of H₂SO₄ produced?The mass of H₂SO₄ produced can be obtained as illustrated below:
SO₃ + H₂O -> H₂SO₄
Molar mass of SO₃ = 80 g/molMass of SO₃ from the balanced equation = 1 × 80 = 80 g Molar mass of H₂SO₄ = 98 g/molMass of H₂SO₄ from the balanced equation = 1 × 98 = 98 gFrom the balanced equation above,
80 g of SO₃ reacted to produce 98 g of H₂SO₄
Therefore,
6.58 g of SO₃ will react to produce = (6.58 × 98) / 80 = 8.06 g of H₂SO₄
Thus, the mass of H₂SO₄ produced is 8.06 g
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Examine the fossil. List the parts of the animal that you recognize. What kind of animal do you think this was?
Answer:
I think it was a huge fish. umm not sure
Explanation:
A 1.5 L sample at 298 K contains 0.030 mol N₂ and 0.0020 mol O₂. If the total pressure of the
system is 0.52 atm, what is the partial pressure of the two gases?
A 1.5 L sample at 298 K contains 0.030 mol N₂ and 0.0020 mol O₂. If the total pressure of the system is 0.52 atm, the partial pressure of N₂ is 0.49 atm and the partial pressure of O₂ is 0.03 atm.
The mole fraction of N₂ :
X N₂ = moles of N₂ / total moles
= 0.030 / ( 0.030 + 0.0020 )
= 0.94
moles fraction of O₂ = 1 - 0.094 = 0.06
partial pressure of N₂ = 0.95 × 0.52
= 0.49
partial pressure of O₂ = 0.06 × 0.52
= 0.03
Thus, A 1.5 L sample at 298 K contains 0.030 mol N₂ and 0.0020 mol O₂. If the total pressure of the system is 0.52 atm, the partial pressure of N₂ is 0.49 atm and the partial pressure of O₂ is 0.03 atm.
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A big rock until small pebbels remain the mass of all pebbels is less than the mass of the rock what probably happens to the rest of the rocks
It is likely that the rest of the rock was broken down into even smaller particles, such as sand or dust.
What happens to rocks when they get smaller?This process of breaking down rocks into smaller particles is called weathering and can occur due to various factors, such as water, wind, and temperature changes. These small particles have less mass than the original rock and the pebbles, but they still contribute to the overall mass of the material. Over time, the small particles can be transported by water or wind and deposited in different locations, contributing to the formation of new landforms.
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you made two copper/silver cells with silver ions at non-standard concentrations. (see extra info in experiment - voltaic cell potentials above). your measured experimental potentials are 0.303 v when the concentration of silver ion is 0.01 m and 0.240 v when the concentration of silver ion is 0.001 m. based on how the cells were made, what are the theoretical cell potentials for each?
The theoretical cell potential for the first second cell are 0.1915 V and 0.088 V respectively
ln is the natural logarithm
Q is the reaction quotient
The reaction occurring at each half-cell is written as:
Ag⁺ + e⁻ → Ag
For the first cell, the concentration of silver ions is 0.01 M.
Equilibrium constant, K = [Ag⁺]/[Ag] = 0.01/1.79 × 10⁻¹⁰
The reaction quotient, Q = [Ag⁺]/[Ag] = 0.01/1.79 × 10⁻¹⁰
Cell potential,E = E° - (RT/nF) * ln
Q= 0.80 - (8.31 × 298)/(1 × 96,485) * ln(0.01/1.79 × 10⁻¹⁰)= 0.80 - (0.0257) * 23.92= 0.1915 V
Therefore, the theoretical cell potential for the first cell is 0.1915 V.
For the second cell, the concentration of silver ions is 0.001 M.
Equilibrium constant, K = [Ag⁺]/[Ag] = 0.001/1.79 × 10⁻¹⁰
The reaction quotient, Q = [Ag⁺]/[Ag] = 0.001/1.79 × 10⁻¹⁰
Cell potential,E = E° - (RT/nF) * lnQ= 0.80 - (8.31 × 298)/(1 × 96,485) * ln(0.001/1.79 × 10⁻¹⁰)= 0.80 - (0.0257) * 30.12= 0.088 V
Therefore, the theoretical cell potential for the second cell is 0.088 V.
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Consider the chemical change AÛB. After the reaction starts, but before the system reaches equilibrium, the only process that takes places is A being converted into B.
A) True
B) False
False. Prior to the system reaching equilibrium, additional activities including the reverse reaction, reactant consumption, and product production are occurring as A is being transformed into B during the reaction.
The reactants are transformed into products during a chemical reaction through a sequence of processes. In addition to pushing ahead, the system is also shifting backward. As a result, processes other than A being changed into B are occurring. For instance, the opposite reaction, in which B is changed back into A, is also present.
Additionally, reactant consumption takes place, which means that when A is consumed during the forward reaction, its concentration declines. As B is created by the forward reaction, its concentration rises concurrently. As B is eaten, A is created in the opposite reaction, and vice versa. Therefore, it is untrue to state that the sole action occurring in a chemical reaction prior to equilibrium is the transformation of A into B. The response is a dynamic process that involves several simultaneous processes that all work together to bring the system's final equilibrium state about.
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In which of the following segments is sodium not actively transported out of the nephron?A. Proximal convoluted tubuleB. The thin segments of the loop of HenleC. Distal convoluted tubuleD. Sodium is always actively transported out of the nephron.
The thin segments of the loop of Henle are the only segment where sodium is not actively transported out of the nephron. The correct answer is B.
Sodium is actively transported out of the nephron in the segments of the kidney tubules responsible for reabsorption, which include the proximal convoluted tubule, the thick ascending limb of the loop of Henle, and the early part of the distal convoluted tubule. In these segments, sodium is transported out of the nephron against its concentration gradient using primary active transport mechanisms, such as the sodium-potassium ATPase pump.In contrast, the thin descending limb of the loop of Henle is permeable to water but not to ions, including sodium. Therefore, no active transport of sodium occurs in this segment, but rather water reabsorption takes place by osmosis, leading to an increase in the concentration of sodium in the lumen of the nephron.In summary, the correct answer is B. The thin segments of the loop of Henle are the only segment where sodium is not actively transported out of the nephron.For more such question on nephron
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What is a binary ionic compound?An element.A compound made of two ions.A mixture.A compound made of two or more ions.
Answer
A compound made of two ions.
Explanation
A binary compound is a compound formed from two different elements. There may or may not be more than one of each element.
For a binary ionic compound, a metal will always be the first element in the formula, while a nonmetal will always be the second.
Hence, a binary ionic compound is a compound made of two ions.
What would be the final temperature if 3.31 x
18.5 grams of water at 22.0°C?
The final temperature of the water is 64.59°C.
Given,
Heat (Q) = 3.31 x 103 J
Mass of water (m) = 18.5 gm
Initial temperature (Ti) = 22°C
Final temperature =?
Specific heat - The heat required to raise the temperature of a substance by one-degree Celcius. The relation between heat and temperature change is Q = m × c × ΔT.
where Q = heat energy
m = mass of the substance
c = specific heat of the substance
ΔT = change in temperature
Now, we will use the same formula to calculate the final temperature of the water-
Q = m × c × ΔT
Q = m × c × ( final temperature - initial temperature)
3.31 x 103 = 18.5 x 4.2 x (final temperature - 22)
(Specific heat of water (c) = 4.2 J/g degrees Celcius)
3.31 x 103 = 77.70 x (final temperature - 22)
3.31 x 103 / 77.70 = final temperature - 22
33100/777 = final temperature - 22
42.59 = final temperature - 22
Final temperature= 42.59 + 22 = 64.59°C
Hence, the final temperature of the water is 64.59°C.
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A rock has a mass of 15 grams and a
volume of 3 cm3. What is the density of the
rock?
HINT; The formula for density is:
density =
mass (g)
volume (cm)
A А
B
5 g/cm3
18 g/cm3
45 g/cm3
Answer:
5 g/cm3
Explanation:
Density = mass/volume
density = 15g / 3 cm3 = 5g/cm3
Answer:
3.34 g/cm3
Explanation:
Which substance is composed of only one type of atom? - Need asap!
Water
Gold
Salt
Sugar
Answer:
Gold
Hope it helps
have a good day
concentrated aqueous hydrochloric acid is 37.2 wt% hcl and has a concentration of 12.1 m. calculate the volume of concentrated hydrochloric acid that should be diluted to 1.80 l to form a 3.10 m hcl solution.
The volume of concentrated hydrochloric acid that should be diluted is 1.2 g/ml.
By the formula,
M1V1 = M2V2
M1 = molarity of standard HCl = 12.1 M
V1 = volume of standard HCl = ?
M2 = molarity of diluted HCl = 3.10 M
V2 = volume of diluted HCl = 1.8 L
(12.1 × V1) = (3.1 × 1.8)
V1 = 0.461 L = 461 ml
M = wt%×d×10/Mwt
so that, M = 12.1
wt% = 37.2%
d = density = ?
Mwt = molar mass of HCl = 36.5 g/mol
12.1 = (37.2 × d × 10)/36.5
d = density of HCl = 1.2 g/ml
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if, for every two co2 produced each year, three o2 are required from the atmosphere, what should be the decrease in concentration (ppm) of o2 each year?
The decrease in concentration (ΔO₂) of O₂ each year, given that for every two CO₂ produced, three O₂ are required from the atmosphere, can be calculated using the equation:
ΔO₂ = (3/2) * ΔCO₂
Where:
ΔO₂ represents the decrease in concentration of O₂
ΔCO₂ represents the increase in concentration of CO₂
According to the given information, for every two CO₂ produced, three O₂ are required. This ratio of 3 O₂ to 2 CO₂ can be used to determine the change in concentration.
Therefore, the decrease in concentration of O₂ each year is equal to (3/2) times the increase in concentration of CO₂.
It's important to note that the units of concentration should match, such as parts per million (ppm), for both CO₂ and O₂. The resulting decrease in concentration of O₂ (ΔO₂) will also be in ppm.
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Element 2 is:
A) Cobalt
B)Chlorine
C)Calcium
D)Carbon
Answer:
D: Carbon
Explanation:
Carbon is the sixth element with a total of 6 electrons in the periodic table. Hence the atomic number Z = 6. The ground state electron configuration of carbon is 1s2 2s2 2p2. An excited state electron configuration of carbon is 1s2 2s1 2p3.
if 102 mg of methyl cinnamte is reduced to give the product shown in scheme 4 and 87 mg of product is isolated, what is the percent yield? give only the number to at least one decimal place and not a % or the word percent.
To calculate the percent methyl yield, we need to divide the amount of product obtained by the amount of theoretical yield, then multiply by 100.
Theoretical yield = 102 mg
Actual yield = 87 mg
Percent yield = (Actual yield / Theoretical yield) * 100
Percent yield = (87 / 102) * 100 = 85.3
So the Methyl is : 85.3
About Methyl
Methyl is a hydrophobic alkyl functional group. Its name is derived from methane, a simple alkane compound. Methyl is methane which has lost a hydrogen atom, making it unstable and reactive. Its chemical formula is -CH₃. This group occurs frequently in many organic compounds.
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True/False?pyrophoric substances can burn spontaneously in air.
The given statement "pyrophoric substances can burn spontaneously in air." is true as pyrophoric materials are those that spontaneously ignite when ignited and exposed to air.
A chemical that spontaneously ignites in air at a temperature of 130 °F (54.4 °C) or lower is referred to as a pyrophoric gas. Chemicals classified as pyrophoric will spontaneously ignite in air at 130°F (54.4°C) or lower. Pyrophores frequently burn up in the presence of air due to a strong reaction with oxygen or water vapor.
Pyrophoric materials are those that spontaneously ignite when ignited and exposed to air. A brief overview of pyrophoric materials and flame safety is provided here. Materials classified as pyrophoric ignite instantly when exposed to oxygen. They may also react with water, producing heat and hydrogen (a flammable gas).
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what is the normal range for the extracellular concentration of sodium?
The average body sodium content of an adult male is 92 g, of which half (46 g) is found in the extracellular fluid (ECF) at a concentration of 135–145 mmol/L, 11 g is discovered in the intracellular fluid at a concentration of 10 mmol/L, and 35 g is discovered in the skeleton.
The sodium-potassium pump action moves sodium and potassium, respectively, from within to outside the cell and vice versa against the concentration gradient using the energy provided by ATP. This maintains the concentration gradient between the ECF and intracellular fluid. Sodium enters the polarised cells of the renal tubular epithelium or the intestinal wall through specific channels or other transport mechanisms from the tubular lumen or the gut, and is then extruded from the cell into the neighbouring capillaries due to the action of the pump, which is primarily distributed on the basolateral sides of the cell. Sodium transport in these cells is typically linked to the transport of other substrates, such as phosphates, amino acids, glucose, and galactose.
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4. Manik saw his father watering his garden plants in hot weather. He noticed that
water doesn’t stick to the plant leaves and leaves become dry but looked fresh. He asked
following questions to his teacher
a. Which tissue forms the outer covering of a plant and does it have a protective role
to play?How ?
b. Why does water not stick to the leaves?
Water does not stick to the leaves of the plant owing to the fact that the leaves has a waterproof cuticle.
What tissues protects the leaves?We know that the leaves are the parts of the plant that are involved in photosynthesis. Photosynthesis is the process by which green plants produce their own food in the presence of sunlight and chlorophyll. We know that the leave has an outer protective covering.
The tissue that plays this outer covering of a plant for is the epidermis and its waxy cuticle. It prevents damage to the plant.
Water does not stick to the leaves of the plant owing to the fact that the leaves has a waterproof cuticle.
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