The balanced overall reaction from these unbalanced half-reactions is given in following steps ,
Step 1 : [tex]Sn[/tex] → [tex]Sn^{+2}+ 2e^{-}[/tex]
Step 2 : [tex]Ag^{+}[/tex] + [tex]e^{-}[/tex] → [tex]Ag[/tex]
[tex]2Ag^{+} + 2e^{-}[/tex] → [tex]2Ag[/tex]
Overall reaction : [tex]Sn[/tex] + [tex]2Ag^{+}[/tex] → [tex]Sn^{+2}[/tex] + [tex]2Ag[/tex]
The equation in which number of atoms of elements in reactant side is equal to the number of atoms of elements in product side is called balanced chemical equation .
This step is oxidation half-reaction in which loss of electron is takes place .
Second steps is reduction reaction in which fain of electrons is takes place. We multiple second half-reaction by two to make equal number of electrons in both steps to cancel out the electrons from the equation.
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Which of the following is true: A. Gamma rays are too dangerous to be used in a medicinal way. B. Gamma radiation is used commonly used in smoke detectors C. Gamma radiation should never be used on food products. D. Gamma radiation is frequently used on food to kill bacteria.
Answer:
D
Explanation:
Gamma radiation penetrates the cell wall of prokaryotic organisms such as bacteria and can inhibit their metabolic functions as well as destroy their DNA.
Debunking the other answers:
A is incorrect as Gamma radiation is used in the treatment of cancer via radiotherapy.
B is incorrect as Gamma rays are too small and would just penetrate any smoke particles.
C is incorrect because Gamma rays are used to disinfect food products to prevent food borne illness. Irradiation is safe to use on food and does not make it radioactive.
Thus, D is correct.
If you halve the volume of a constant amount of gas at a constant temperature, what happens to the pressure?
According to Boyle's law, If one halves the volume of a constant amount of gas at a constant temperature, the pressure will be doubled.
What is Boyle's law?Boyle's law is one of the gas laws that states that the pressure of an ideal gas is inversely proportional to its volume at constant temperature.
Boyle's law equation can be represented as follows:
P = KV
This law suggests that as the pressure of a gas increases, the volume decreases.
Therefore, in accordance with Boyle's law, If one halves the volume of a constant amount of gas at a constant temperature, the pressure will increase times 2 or double.
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Rutherford’s gold foil experiment gave evidence that an atom is mostly empty space. true false
The given statement is true .
What is Rutherford’s gold foil experiment?A piece of gold foil was hit with alpha particles, which have a favorable charge. Most alpha particles went right around. This showed that the gold particles were mostly space.The Rutherford gold leaf investigation supposed that most (99%) of all the mass of an atom is in the middle of the atom, that the nucleus is very small (105 times small than the length of the atom) and that is positively captured.For the distribution experiment, Rutherford enjoyed a metal sheet that could be as thin as practicable. Gold is the most malleable of all known metals. It can easily be converted into very thin sheets. Hence, Rutherford established a gold foil for his alpha-ray scattering experimentation.To learn more about Rutherford’s gold foil experiment, refer to:
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Sodium hydrogen carbonate were disolved in 10cm cubed of water in a boiling tube . Lemon juice was then added dropwise with shaking until there was no further observable change. Explain the observation which was made in the boiling tube when the reaction was in progress.
The observation is the evolution of carbon dioxide gas.
Acid-base reactionSodium hydrogen carbonate is a base while lemon juice contains an acid known as citric acid.
Thus, the reaction in the illustration is involving an acid and a base.
Sodium hydrogen carbonate goes by the formula: NaHCO₃
Citric acid goes by the formula: C₆H₈O₇
The reaction between the two goes thus:
[tex]3 NaHCO_3 + C_6H_8O_7 --- > 3 H_2O + 3 CO_2 + Na_3C_6H_5O_7[/tex]
The carbon dioxide gas is evolved from the reaction vessel in the form of bubbles.
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3h2so4 2b(oh)3 - b2(so4)3 6h2o what is the mole ratio between water and sulfuric acid?
Since there is an equal number of each element in the reactants and products of 3H2SO4 + 2B(OH)3 = B2(SO4)3 + 6H2O, the equation is balanced.
What is Sulfuric acid?Sulfuric acid (H2S04) is a corrosive substance, that destroys the skin, eyes, teeth, and lungs. Severe vulnerability can result in death. Workers may be harmed from disclosure to sulfuric acid. The level of exposure depends on The sulfuric acid bleaching can substitute the presently assumed oxygen and chlorine stages if the additives are allowed. This bleaching process was also practical for oxygen-bleached hardwood kraft pulp, but it was less compelling for softwood kraft pulp and oxygen-bleached softwood kraft pulp.Disbanding sulfuric acid in water is an exothermic procedure. When sulfuric acid is mixed with ice this exothermic procedure causes the temperature to rise at first, but as more of the ice dissolves, the temperature falls.To learn more about Sulfuric acid, refer to:
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A mass spectrum for propane will have its largest peak at what number? (ie-mass of propane)
A mass spectrum for propane will have its largest peak at 44 number.
Mass spectrum
.An analytical method for determining the mass-to-charge ratio of ions is mass spectrometry (MS). The findings are displayed as a mass spectrum, which is a plot of intensity against the mass-to-charge ratio. Mass spectrometry is utilized in a wide range of disciplines and can analyze both pure materials and intricate mixtures. A visualization of the ion signal as a function of the mass-to-charge ratio is known as a mass spectrum. The masses of particles and molecules in a sample, as well as the chemical identity or structure of molecules and other chemical compounds, are all determined using these spectra.
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What is the molar mass of a protein if a 0. 30 l of solution containing 0. 45 g of the protein has an osmotic pressure of 0. 80 torr at 25∘c?
The molar mass of a protein if a 0. 30 l of solution containing 0. 45 g of the protein has an osmotic pressure of 0. 80 torr at 25∘c is 0.348 g/mol
Here we can apply the formula ∏ = iMRT, where ∏ = osmotic pressure = 0.80 - ( given ). This is only one part of the information we are given / can conclude in this case ....
i = van’t Hoff factor = 1 for a protein molecule,
R = gas constant = 62.36 L torr / K-mol,
T ( temperature in Kelvin ) = 25 + 273 - conversion factor C° + 273 = 298K
( Known initially ) ∏ = osmotic pressure = 0.80 torr
besides the part " M " in the formula, which we have no information on whatsoever, as we have to determine it's value.
_____
Substitute derived / known values to solve for M ( moles / liter ) -
∏ = iMRT
⇒ 0.80 = ( 1 )( M )( 62.36 )( 298 )
⇒ 0.80 = M( 18583.28 )
⇒ M = 0.80 / 18583.28 ≈ 4.3049 ....
_____
We know that M = moles / liter, so we can use this to solve for moles, and hence calculate the molar mass by the formula molar mass = g / mol -
M = mol / l
⇒ 4.3049 = 0.045 / 25 mL ( 0.030 L ),
0.045 / 0.030 = 1.5 g / L
⇒ 1.5 g = 4.3049 moles,
molar mass = 1.5 g = 4.3049 moles = 0.348 g / mol
Thus the concluded that the molar mass of protein is 0.348 g / mol.
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9.0 mol Na2S can from 9.0 mol CuS and 8.0 mol CuSO4 can form 8.0 mol Cus.
What mass of Cus forms during the reaction?
Cus; 95.62 g/mol
Answer:
765.0 grams CuS
Explanation:
The limiting reagent is the reactant which completely reacts before the other reactant(s) is used up. When 9.0 moles Na₂S and 8.0 moles CuSO₄ react, it appears that CuSO₄ is the limiting reagent. You can tell because it results in the production of less product.
You can determine the mass of CuS by multiplying the moles by the molar mass. It is important to arrange the ratio in a way that allows for the cancellation of units.
Molar Mass (CuS): 95.62 g/mol
8.0 moles CuS 95.62 g
------------------------- x ----------------------- = 765.0 grams CuS
1 mole
Simon measured the density of a piece of metal
to be 11.70 g/cm³. However, the manufacturer
claims it has a density of 12.00 g/cm³. What is
the percent error of Simon's measurement?
From the question we know that 12 - 11.70 = 0.3 so 0.3 / 12 = 0.025 therefore Simon's percent error is 2.5%.
Percent error compares an estimate to an accurate value and expresses the difference among them as a percent. This statistic lets analysts recognize the scale of the mistake relative to the true cost. it's also referred to as percentage error as well as % mistakes.
Percentage errors Calculation Steps :
Subtract one cost from another.Divide the mistake by the exact or ideal price (not your experimental or measured value).Convert the decimal variety into a percentage by multiplying it by using 100.Add a percent or % symbol to record your percentage mistakes value.Percentage error tells you the way huge your mistakes are when you degree something in an experiment. Smaller values suggest that you are close to the accepted or actual value. for instance, a 1% blunder means that you obtain very near the accepted value, whilst 45% means that you were pretty a long way off from the real value.
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24. 00 ml of a 0. 25 m naoh solution is titrated with 0. 10m hcl. What is the ph of the solution after 24. 00 ml of the hcl has been added?.
The pH of the solution is 12.88.
Calculation:
millimoles of NaOH = volume x Molarity
= 24.00 mL x 0.25 M
= 6.00 mmole
millimoles of HCl = 24.00 mL x 0.10 M
= 2.40 mmole
Total volume = 48.00 mL
NaOH + HCl → NaCl + H2O
initial 6.00 0 0 0
added 2.40
change -2.40 -2.40 +2.40 +2.40
equilibrium 3.60 0 2.40 2.40
The pH is determined by the excess of NaOH present.
[NaOH] = millimoles/volume
= 3.60/48.00
= 0.075 M
pOH = -log (OH⁻).
= -log (0.075)
= 1.12
Then
pH + pOH = pKw = 14.00.
pH = 14 - pOH
pH = 14 - 1.12
pH = 12.88
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does anyone know the answer to this? is it A?
Answer:
1/2 ( the two answers given are not FRACTIONS)
Explanation:
Moles of CH3OH = 128 gm / 32 gm / mole = 4 moles
Moles of water 72 gm / 18 gm /mole = 4
Mole fraction of CH3OH = 4 / ( 4+4) = 4/8 = 1/2
How much naoh (in mg) is needed to prepare 546 ml of solution with a ph of 10. 00?
2.18 mg of naoh is needed to prepare 546 ml of solution with a ph of 10.00.
What is Molarity?
The amount of a substance in a specific volume of solution is known as its molarity (M). The number of moles of a solute per liter of a solution is known as molarity. The molar concentration of a solution is another name for molarity.
We want pOH 4 NaOH solution
Given, pH (10) convert to pOH
pOH = 4; pOH = -log (OH⁻) = 1 x 10⁻⁴ M = NaOH
Once we have got the Molarity = Moles of NaOH/Litre of soln.
Stoich = 1 x 10⁻⁴ M/L X 0.546 L X 40 g NAOh/1 mol
Naoh = 2.18 X 10⁻³ g NaOH = 2.18 mg
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In the malate–aspartate shuttle, electrons are transferred from _____________ to form malate.
In the malate–aspartate shuttle, electrons are transferred from oxaloacetate to form malate.
A crucial mechanism employed by mitochondria, the malate-aspartate shuttle system, also known as the malate shuttle, enables electrons to pass through the impermeable membrane separating the cytosol as well as the mitochondrial matrix. Glycolysis produces the electrons which are required for oxidative phosphorylation.
The liver, heart, as well as kidney, include the malate-aspartate shuttle, which produces about three molecules of ATP for every cytosolic NADH molecule. Under aerobic conditions, it constitutes quantitatively the most significant shuttle for such reoxidation of cytosolic NADH in vertebrate tissues.
Therefore, In the malate–aspartate shuttle, electrons are transferred from oxaloacetate to form malate.
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Given substances f2, kr, cl2 and hbr rank them with respect to the highest boiling point?
The Hbr has highest boiling point followed by Kr , [tex]Cl_{2}[/tex] and [tex]F_{2}[/tex] .
The Hbr has highest boiling point due to presence of intermolecular H-bonding that is hydrogen bonding.
The electronegativity of bromine is greater than hydrogen atom. The electronegativity difference hydrogen atom and bromine atom is high. So, due to this a positive dipole is generated at hydrogen atom and partial negative charge, these partial charge is called dipole. In a HBr molecule one H-atom attracted by Br-atom of another atom by force of attraction and this partial force of attraction is called H-bonding.
Other all given molecules are arrange according to its molecular mass because boiling points is directly proportional to the molecular mass of molecule.
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There are 4 gleeks in a glook, 7 glooks in a gluck, and 5 glucks in a glack. how many gleeks are in 4 glacks?
Answer:
9
Explanation:
because there are 4 gleeks and 5 Gluck's in a glack
Determine the number of moles of aluminum in 2. 154 x 10-1 kg of al.
a. 5.816 mol
b. 7.984 mol
c. 6.02 x 1023 mol
d. 4.801 mol
e. 8.783 mol
The moles are the estimation of the quantities like the molecules and the atoms. There are 7.984 moles of aluminum present in the 2.154 × 10⁻¹ kg substance. Thus, option b is correct.
What are moles?The moles give the estimation of the smaller entities by the ratio of mass or weight to the molar mass of the substance.
The formula for moles is given as,
Moles = mass ÷ molar mass
Given,
Mass of aluminium = 2.154 × 10⁻¹ kg = 2.154 × 10² gm
Molar mass of Al = 26.9 g/mol
Substituting values above:
Moles = 2.154 × 10² gm ÷ 26.9 g/ mol
= 7.984 mol
Therefore, option. 7.984 moles of aluminum are present.
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How much 0. 5mna2so4 solution will completely precipitate the ba2 in 0. 7l of 0. 13mbacl2 solution?
The volume required to precipitate 0.7l of 0.13 m BaCl2 is 0.04L.
Calculations of number of moles for given molarity of solutionwe use
Molarity =Moles of solute / volume of solution (in litre)
Now, for barium ions
Given,
Molarity of solution = 0.13 m
Volume of solution = 0.7L
By substituting all the value ,we have
Moles of Barium = 0.7 × 0.13
= 0.091
Chemical equationBaSO4 » Ba2+ + So2-
By stoichiometry of equation
1 mole of sulphate ion precipitate 1 mole of barium ion
So, 0.091 mole of sulphate ion precipitate
0.091 of moles of Barium ion
Calculation of volume of sulfate ionNow, calculate the volume of ions by using equation as given above
Mole of sulphate ion = 0.091 mol
Molarity concentration of sulphate ions = 0.05m
By substituting all value , we get
C = n / V
V = n/ C
= 0.091 / 0.5 = 0.04L
Thus, we calculated that the volume required to precipitate 0.7l of 0.13 m BaCl2 is 0.04L.
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The coefficient of performance (cop) of a refrigerator is defined as the ratio of?
The coefficient of performance (cop) of a refrigerator is defined as the ratio of " the work necessary to heat or cool something usefully."
The usable heating or cooling delivered to work required ratio, also known as the coefficient of performance, or COP, of a heat pump, refrigerator, as well as air conditioning system. Higher efficiency, less energy (power) usage, and thus reduced operational costs are all related to higher COPs.
Coefficient of performance formula:
[tex]K = Q_{H} / W_{in}[/tex]
where, K = Coefficient of performance, [tex]Q_{H}[/tex] = heat of pumps output, [tex]W_{in}[/tex] = work required by the system.
It is refrigeration's coefficient of performance (COP) will always be greater than 1.
Therefore, the coefficient of performance (cop) of a refrigerator is defined as the ratio of " the work necessary to heat or cool something usefully."
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Why do the planets in our solar system orbit in approximately the same plane around the sun?
In the laboratory, a student dilutes 18. 9 ml of a 10. 0 m perchloric acid solution to a total volume of 250. 0 ml. what is the concentration of the diluted solution? concentration = m submit answer
The concentration of diluted solution is 0.756M.
From the question given above, the following data were obtained:
Volume of stock solution (V1) = 18.9 mL
Molarity of stock solution (M1) = 10 M
Volume of diluted solution (V2) = 250 mL
Molarity of diluted solution (M2) =?
We can obtain the molarity of the diluted solution by using the dilution formula as shown follow:
M1V1 = M2V2
10 × 18.9 = M2 ×250
189 = M2 × 250
Divide both side by 100
M2 = 189 / 250
M2 = 0.756 M
Therefore, the molarity of the diluted solution is 0.756 M.
Thus the concluded that concentration of the dilute acid is 0.756 M.
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H2o is initially present in a state where its molecules are far apart. during a change of state, its molecules slow down. which change of state has most likely taken place?
H2o is initially present in a state where its molecules are far apart. during a change of state, its molecules slow down. Gaseous state to liquid state has most likely take place.
In the gaseous state, molecules of water are far away. Hence intermolecular forces are weak.
But when water vapours changes into liquid state molecules start coming closer. And hence intermolecular forces become strong.
Due to this entropy of water molecules decreases.
Thus from above we concluded that when water vapour changes into liquid its molecules is slow down.
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The oxygen used for preheating and the fuel gas are combined in the ____ chamber before burning.
Answer:
Mixing chamber
What substance is produced at the cathode during the electrolysis of molten calcium bromide, cabr2cabr2? assume standard conditions
Magnesium (Mg) metal is the substance produced at the cathode.
As molten calcium bromide is electrolyzed, calcium (Ca) metal is the substance produced at the cathode.
Due to the fact that oxidation always takes place at the anode and reduction always occurs at the cathode,
Consider the two cations that were produced in the two ionisation processes of the two substances: mathrm Ca +2 and mathrm Mg +2. The following is how to express two cations' potential cathode reactions:
[tex]ca { }^{ + 2} + (aq) + 2e {}^{ - } - > \\ ca(s)E {}^{0} _{ca {}^{ + 2} \div ca } = - 2.87v[/tex]
[tex] Mg{ }^{ + 2} + (aq) + 2e {}^{ - } - > \\Mg(s)E {}^{0} _{Mg {}^{ + 2} \div Mg} = - 2.37v[/tex]
[tex] Mg^{ + 2} [/tex]
will be reduced quickly since it has a low electronegative electrode potential.
Thus, magnesium (Mg) metal is the substance produced at the cathode.
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The energy of the ground state in the bohr model is -13. 6 ev. the energy of the n = 2 is:_______
Bohr's model explained the position of the electron, proton, and neutron in the atom of the element. The energy at the n = 2 level of the atom will be - 3.40 eV.
What is the principal quantum number (n)?The principal quantum number (n) has been the distance of the electron of that atom in the nucleus and its energy in the structure. It can also be said to define the size of the atomic orbit.
n = 2 is the first excited state whose energy is calculated as:
Eₙ = − 13.6 ÷ n² eV
E₂ = - 13.6 eV ÷ 2²
= -3.40 eV
Therefore, -3.40 eV is the energy of electron at n = 2.
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Sample Response: The change in her position (from beginning to end), along with the direction, is considered her displacement. This value is a measurement and a direction. The total distance along the path from her starting point to her end point is considered her distance. This value is a measurement only. What did you include in your response? Check all that apply.
The sample response given in the question is right. Displacement is the shortest distance between the initial and final points of a body. Distance is the length of actual path of the body between initial and final positions.
To find the answer, we need to know more about the distance and displacement.
How distance differ from displacement?Displacement is the shortest distance between the initial and final points of a body.It is the change in position with a fixed direction.Displacement is a vector quantity and can be positive, negative or zero values.Distance is the length of actual path of the body between initial and final positions.It's a scalar quantity and it can be positive or zero.The magnitude of displacement is less than or equal to the distance travelled.Thus, we can conclude that the given sample response is right.
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When a substance is entering a phase change, the gain or loss of heat is a result of:______.
When a substance is entering a phase change, the gain or loss of heat is a result of energy gained or lost in forming or breaking intermolecular interaction.
The constant temperatures occur when a substance is undergoing a phase transition. If heat is removed from a substance , such as in freezing and condensation , then the process is exothermic . In this instance , heat is decreasing the speed of the molecules causing then move slower.
Example : liquid to solid and gas to liquid .
These changes release heat to the surrounding.
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How many neutrons are needed to initiate the fission reaction? u92235 ?10n⟶te52137 zr4097 210n
Neutrons are required. Atomic Radiation, Nuclear Graphite, and Effects
The fission reaction is often started by an impinging neutron, and each fission produces an average of 2.5 neutrons.
With the exception of the hydrogen nucleus, which has a single proton, neutrons are necessary for the stability of nuclei. Nuclear fission and fusion generate a tonne of neutrons.
Scattering tests and research on nuclear binding energies provide evidence for the nuclear forces' finite range. The neutron-proton (n-p) potential energy map in Figure 44.3a, which was created by scattering neutrons from a target containing hydrogen, illustrates the short range of the nuclear force. The n-p potential energy well is 40 to 50 MeV deep, and the nucleons are prevented from getting much closer than 0.4 fm by a strong repulsive component.
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We need to add one neutron to initiate the fission reaction.
What are nuclear reactions?The reaction in which the identity or characteristics of an atomic nucleus change due to the bombarding of it with an energetic particle is known as a nuclear reaction.
The bombarding particle can be an alpha particle, a gamma-ray photon, a neutron, a proton, or a heavy ion.
What is nuclear fission?In nuclear fission, an atom splits into lighter nuclei due to the bombarding of an energetic particle.
The reaction given is
[tex]_{92}^{235}U + .... _{0}^{1}n \rightarrow _{52}^{137}Te + _{40}^{97}Zr +_{0}^{1}n[/tex]
To find the number of neutrons we have to balance the reaction
Atomic mass on reactant side = 235 + 1 = 236
The atomic number on the reactant side = 92
Atomic mass on the products side = 137+97+2 = 236
The atomic number on the products side = 92
As the reaction is already balanced
We need to add one neutron to initiate the fission reaction.
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Hello people ~
Volume of one mole of any gas at NTP is
(a) 11.2 litre
(b) 22.4 litre
(c) 10.2 litre
(d) 22.8 litre
Answer:
Volume of one mole of any gas at NTP is
(b) 22.4 litre
Answer:
22.4L
Explanation:
One mole of any gas at STP weighs 22.4L.
STP stands for Standard Temperature and pressure
273.15KPressure 1atmWhat eventually happens to a gas if its pressure is increased?
Answer:
According to Boyle's law pressure of a particular amount of gas is inversely proportional to the volume of the gas.So, when we increase the pressure of the gas the volume of the gas decrease and the gas start to condense.Thus if the pressure of a gas increases it starts to condense.Explanation:
Hope It Helps!!!!
Answer:
See belwo
Explanation:
First it becomes a compressed gas.... further pressure will cause it to condense into a liquid.
The _____ is the mass of tissue lying beside the fetus that allows nutrients and oxygen to pass from the mother's blood to the baby's blood
A sizable organ that grows during pregnancy is the placenta. It is typically at the top or side of the uterine wall where it is attached. The placenta and your baby are joined by the umbilical cord. Through the placenta's filtering of the mother's blood and the umbilical cord, your baby receives oxygen, glucose, and other nutrients.
A sizable organ that grows during pregnancy is the placenta. It is typically at the top or side of the uterine wall where it is attached. The placenta and your baby are joined by the umbilical cord.
Blood from the mother filters oxygen, glucose, and other nutrients before traveling via the placenta and reaching your baby through the umbilical cord.
Blood from the mother filters oxygen, glucose, and other nutrients before traveling via the placenta and reaching your baby through the umbilical cord. Additionally, the placenta filters out elements that can be dangerous to your unborn child and eliminates waste products and carbon dioxide from your unborn child's blood.
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