For a fish to completely decompose if there were no decomposers, it takes few days to more than a week.
Decomposers are living organisms like fungi and bacteria. These decomposers are heterotrophic which means they must take the nutrients and it cannot make its own food. Decomposers play an eminent role in an ecosystem because of their process of nutrition.
They break down the dead plants and the animals. These break down the waste of the organisms. They are very eminent for all the ecosystem. If these were not in the ecosystem, the plants cannot get essential nutrients, dead matter and waste would deposit. So the nutrients in them gets recycled back so that they can be used again.
When fish dies, there is nothing which is ingested and the bladder air starts to release, which causes the fish to sink to the bottom. After few days, the internal organs of the dead fish gets decomposed, after which a gas is formed.
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the reaction described in part a required 3.92 l of magnesium chloride. what is the concentration of this magnesium chloride solution?
A)compute the mole of AgNO3 first.
volume, when V=1.92 L
use:
amount of mole,
n = Volume * Molarity
= 0.18*1.92
= 0.3456 mole
In light of the balanced equation
AgNO3 = (2/2)*moles of AgCl produced
= (2/2)*0.3456
= 0.3456 mole
This is the quantity of AgCl moles.
AgCl molar mass,
MM equals 1*MM(Ag) + 1*MM (Cl)
= 1*107.9 + 1*35.45
= 143.35 g/mole
use: volume of AgCl,
M = Molar Mass * Molar Number
= 1.434*102 mole/mole x 0.3456 mole
= 49.54 g
Response: 49.5 g
B)Here: AgNO3 = M=0.18 M
V(AgNO3)=1.92 liters
V (MgCl2) = 3.83 L
A balanced response states:
1 mole of AgNO3 = 2 mole of MgCl2, and vice versa.
2*M(MgCl2)*V = 1*M(AgNO3)*V(AgNO3) (MgCl2)
1*0.18*1.92 = 2*M(MgCl2)*3.83
0.0451 M (MgCl2)
Response: 0.0451 M
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When a substance is undergoing a change of state, the temperature of the substance doesn't change until the ____ is complete
Which best explains why h2o has a much higher melting and boiling point than co2?.
Because water is a polar molecule and carbon dioxide is a nonpolar molecule, water has a greater boiling point than carbon dioxide. Since polar molecules have greater intermolecular interactions than nonpolar ones, polar molecules like water require more energy or heat to disintegrate.
Why is the boiling point of water higher?It is highly challenging to break the bonds that make up the massive water molecule due to its substantial hydrogen bonding.
The boiling point tells you what?The temperature at which a chemical's vapor pressure equals atmospheric pressure is known as the boiling point.
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This is energy that is not moving. It is energy that is not
causing any changes now.
A. Kinetic energy
B Potential energy
Answer:
B potential energy
(kinetic energy is energy that is already moving)
sorry if im wrong
The nitrogen in a 30.0 L container at 740 torr and 55°C and the hydrogen in a 20.0 L container at 650 torr and 15°C are pumped into a 25.0 L container at 32°C. What is the final pressure?
Thus the final pressures of N₂ and H₂ are 825.7317torr and 550.6944torr respectively.
It is given that the Volume(V₁) of nitrogen is 30L and Pressure(P₁) of Nitrogen is 740torr and the temperature(T₁) is 55°C.
Similarly, for hydrogen, the volume(V₁) is 20L and Pressure(P₁) is 650torr and temperature(T₁) is 15⁰C.
These two are pumped into a container of Volume(V₂) of 25L and temperature (T₂) 32⁰C
To find the Final pressure of N₂, the following formula is to be used
P₁V₁/T₁ = P₂V₂/T₂
On substituting the values of P₁,V₁,T₁,V₂,T₂ we get P₂ of N₂ as,
(740x30)/328 = 25xP₂/305K
22200/328 = 25xP₂/305K
67.6829x305 = 25P₂
20643.2926/25 = P₂
825.7317torr = P₂
P₂= 825.7317torr
Therefore, the final pressure of N₂ is 825.7317torr
Similarly to find the final pressure of H₂ by applying the same formula we get,
P₁V₁/T₁ = P₂V₂/T₂
On substituting the values of P₁,V₁,T₁,V₂,T₂ we get,
(650x20)/288 = (P₂x25)/305
13000/288 = (P₂x25)/305
45.1388x305 = 25P₂
1376.3611/25 = P₂
550.6944 = P₂
P₂ = 550.6944torr
Therefore, the final pressure of H₂ is 550.6944torr.
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Which sample at STP has the same number of atoms as
18 liters of Ne(g) at STP?
(A) 18 moles of Ar(g)
(B) 18 liters of Ar(g)
(C) 18 grams of H₂O(g)
(D) 18 milliliters of H₂O(g)
A mole is 6.02214076 × 10²³ of any chemical unit, including atoms, molecules, ions, and others. The sample at STP has the same number of atoms as 18 liters of Ne(g) at STP is 18 liters of Ar(g).
What is meant by mole?A mole is 6.02214076 × 10²³ of any chemical unit, including atoms, molecules, ions, and others. Due to the large number of atoms, molecules, or other components that make up any substance, the mole is a useful measure to utilize.
Number of moles = Mass of substance / Mass of one mole.
The amount (n) of a substance is directly proportional to the volume, according to Avogadro's law (V).
Since the number of atoms in both samples is the same, n1/v1 = n2/v2 and n1 = n2.
v1 = v2 and n1/v1 = n1/v2
Therefore, the correct answer is option (B) 18 liters of Ar(g).
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You run an experiment in which two substances chemically react in a closed system. you run the same experiment in an open system. how would the masses of the products in each experiment compare? explain.
If we run an experiment in which two substances chemically react in a closed system and then we run the same experiment in an open system, then the masses of the products in each experiment will be different because the open system allows the interchange of matter and energy with the media.
What is an open system?An open system is an interrelated group pf parts that work together to interchange matter and energy with the surrounding environment, while a closed system does not generate an exchange of matter and energy.
Therefore, with this data, we can see that an open system interchange energy and matter with the environment, while closes systems do it.
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during the cementation phase of lithification, which two minerals most commonly precipitate into the spaces between clasts, to form cement?
During the cementation phase of lithification, the two minerals that most commonly precipitate into the spaces between clasts, to form cement are Quartz and calcite.
What type of rocks is produced from the process of lithification and cementation?
Some sedimentary rocks are "poorly cemented," meaning they could fall apart in your hands. The two minerals that make up the cement in sedimentary rocks most frequently are quartz and calcite. rock with chemical sediments rocks are composed of minerals that accumulated and solidified in water.
Therefore, The lithified counterparts of sediments are sedimentary rocks. They are primarily created by solidifying unconsolidated sediments that already exist via cementing, compacting, and other means.
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Which of the following statements correctly describe CH3COOH (acetic acid)?
a. There are 2 atoms of carbon in one molecule of acetic acid
b. The molar mass of acetic acid is 29.02 g/mol.
c. There are 16.00 amu of oxygen per molecule of acetic acid.
d. There are 4 moles of hydrogen atoms per mol of acetic acid.
The following statements from the given questions are correct.
There are 2 atoms of carbon in one molecule of acetic acid.
There are 4 moles of hydrogen atoms per mol of acetic acid.
If we look at the chemical formula of the acetic acid (CH3COOH) There are two carbon atoms.
The number of moles of Hydrogen is four because there are 4 hydrogen atoms present in acetic acid.
The remaining options are incorrect because the molar mass of acetic acid is 60.05 g/mol and there are 32.00 amu of oxygen per molecule of acetic acid.
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a histidine residue in the active site of aspartate transcarbamoylase, or atcase, is thought to be important in stabilizing the transition state of the bound substrates. predict the ph dependence of the catalytic rate, assuming that this interaction is essential and dominates the ph ‑activity profile of the enzyme. the henderson–hasselbalch equation is ph
ATcase is an allosteric enzyme it has two subunits, one is a catalytic subunit and another one is a regulatory subunit.
What is aspartate transcarbamoylase?
Aspartate carbamoylase is also known by the acronym ATCase. It contains two polypeptides with distinct functions. One is a catalytic unit (carrier carbomylation of the amino group) and the other is a regulatory subunit with regulatory sites. This enzyme catalyzes the formation of N-carbamoylaspartate and inorganic phosphate from carbomoyl phosphate and aspartate. This reaction is the initial step in the synthesis of pyrimidine.
A histidine residue in the active region of aspartate transcarbamoylase is essential for stabilizing the transition state of the bound substrate. In the transition state, the protonated form of histidine stabilizes the negatively charged carbonyl oxygen atom of the scissile bond. Histidine in its deprotonated form inhibits enzyme activity. Therefore, the predicted rate at a pH of 6.5 will be half the maximum and will drop as the pH increases.
Hence, the predicted rate at a pH of 6.5 will be half the maximum and will drop as the pH increases.
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Please help nowwwww please
Answer:
love me and I have a good day for the next few months later they are you going for it is a great deal to the world is the only way I have to the only way I can get a
what volatile organic chemical (voc) is used in foam insulation materials, as a binder in particle board and wood paneling, and many other materials found in homes and offices that is hazardous to your help. carbon monoxide formaldehyde benzonic acid radon gas
"formaldehyde"
A naturally occurring organic substance with the chemical formula CH2O and the structural formula HCHO is formaldehyde. The pure substance, which is a strong, colorless gas that spontaneously polymerizes into paraformaldehyde, is kept in an aqueous solution that is also employed to preserve animal specimens.
At room temperature, volatile organic compounds (VOCs), which are organic chemicals, have a high vapour pressure. The ratio of the sample's molecule in the surrounding air, or volatility, is correlated with low boiling point with high vapor pressure.
Along with being pollutants, VOCs are also responsible for smells and perfumes' odor. VOCs are crucial for interaction among animals and plants, acting as attractants for pollinators, predator defense, and even interactions between individual plants. Some VOCs are harmful to the environment or pose a risk to human health. Laws are in place to control anthropogenic VOCs, especially indoors where concentrations are highest. Although the majority of VOCs are not immediately harmful, they may have long-term, chronic health impacts.
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A substance that consists of two or more types of atoms which have been combined chemically is a(n) _____.
compound
mixture
element
proton
Answer:
Compound
Explanation:
A substance that consists of two or more types of atoms which have been combined chemically is a compound.
1. What are the layers of electrons surrounding the nucleus of an atom called?
Answer:
The electrons surrounding an atom are located in regions around the nucleus called “energy levels”. An energy level represents the 3-dimensional space surrounding the nucleus where electrons are most likely to be. The first energy level is closest to the nucleus.
hope it helps you
Answer: Energy Levels
Explanation: Key Concepts. The electrons surrounding an atom are located in regions around the nucleus called “energy levels”. An energy level represents the 3-dimensional space surrounding the nucleus where electrons are most likely to be. The first energy level is closest to the nucleus.
Which is not supporting evidence for the Big Bang Theory?
Background Radiation
Big Bang Nucleosynthesis
Red Shift
Jupiter's Giant Red Spot
write about a situation in life that models ionic bonding.
Ionic bonds are formed between a metal and non-metal by losing electron from the metal. Daily life examples of ionic compounds are table salt, baking soda, Epsom salt etc.
What are ionic compounds?Ionic compounds are inorganic compounds with strong ionic bonds formed between a metal and non-metal.
When an electropositive atom donates its electron into an electronegative element, there creates an intermolecular force of attraction. The bonded electron are pulled towards the electronegative element.
We have everyday examples of ionic compounds such as table salt, Epsom salt, baking soda or sodium carbonate etc. Table salt that is sodium chloride or NaCl we use it every day is an ionic compound.
The metal sodium donates it electron to chlorine creates the ionic bond in NaCl. Similarly in sodium carbonate and sodium bicarbonate, ionic bonds are formed between sodium metal and carbon.
Therefore, we can find more compounds and models for ionic bonding in daily life such as salt, baking soda etc.
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Question 5
What's the problem with non-renewable resources?
Question 5 options:
A. They are used at a rate much slower than they are formed.
B. Given enough time, we run out of them.
C. They are easily recycled.
The problem with non-renewable resources is given enough time, we run out of them
Non renewable resources means the energy resources include coal, natural gas, oil and also nuclear energy and once this resources are used up then they cannot be replaced again which is the major problem fir humanity and if we run out of non renewable resources then the global economy will be constrained to a semi local condition as there will be no more fuel to move product around so this is also the problem with non renewable resources
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Does the photoelectron spectra (C, N, O, F, Ne) suggest a need to refine shell model of atom? If so, is there another model that provides a better explanation of this data? Justify.
Yes, the photoelectron spectra (C, N, O, F, Ne) suggest a need to refine shell model of atom. the another model that provides a better explanation of this data is
The PES data for n=2 we are getting 2 different peaks for elements C, N, O, F, N . That led to the concept of introduction of existence subshells within the shell of an atom. one peak for n=1 one indicates there is one subshell that is donated by 1s-subshell .Maximum capacity of accommodating electron in 1s-subshell is 2. 2 different peaks for elements C, N, O, F, N means for n=2 we have two different subshells .These are donated by 2s and 2p.Maximum capacity of accommodating electron in 2s-subshell is 2 and that in 2p is 6.
The relative energy of electrons in atoms and molecules are measured experimentally using a method called photoelectron spectroscopy (PES). PES is frequently used by scientists to evaluate molecular bonding or to investigate the elemental composition of materials. However, in this article, we'll utilize PES to further our understanding of atomic structure. By examining PES data for pure samples of elements, we'll show how photoelectron spectroscopy directly supports ideas like electron shells and subshells, arrangements of electrons, and more.
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what do the coefficients in a balanced equation tell us? mark all that apply. group of answer choices the relative volume of each substance involved in a reaction. the number of molecules of reactants and products involved in a chemical reaction. the relative number of moles of each substance involved in a chemical reaction. the relationships between the masses of the reactants and/or products in a reaction.
The coefficient in an equation for a chemical reaction that is balanced reveals some details about the chemical process.
What is balanced chemical reaction?An equation for a chemical reaction is considered to be balanced if both the reactants and the products have the same number of atoms and total charge. In other words, the mass and charge balances on both sides of the reaction are equal.
The coefficient in a balanced chemical reaction equation provides us with the following details about the reaction:
Coefficient tells us, the relative number of moles of each substance involved in a chemical reaction.
For example,
2H₂ + O₂----> 2 H₂O
That's mean, 1 moles of oxygen gives 2 moles of H₂O on reacting with 2 mol of Hydrogen.
The coefficient in a chemical equation tells us also, the number of molecules of reactants and
products involved in a chemical reaction. For example,
N₂ + 3 H₂. -----> 2 NH₃.
Their are, 1 molecule of Nitrogen and 3 molecules of Hydrogen gives 2 molecules of NH₃. therefore
coefficient tells us this information also.
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hypothesis: is the Oobleck going to turn into a solid or liquid?
The Oobleck mixture is neither a liquid nor a solid. The cornstarch-and-water solution produces a fluid that behaves more like quicksand than water applying force causes it to thicken.
What is mixture?A mixture is a substance made up of two or more chemical components that do not combine chemically.
A compound produced by combining two or more different ingredients without triggering a chemical reaction is another way to describe it.
There are two types of mixture.
Homogenous mixture -The most common example of a homogeneous mixture is sugar and water. Homogeneous mixtures are those that have the same properties and combinations throughout their mass.Heterogeneous mixture - A heterogeneous mixture is one that contains both sand and salt. Heterogeneous mixtures indicate that the qualities are not consistent throughout the entire combination by having varied properties and compositions in different portions of the mixture.Thus, the Oobleck mixture is neither a liquid nor a solid. The cornstarch-and-water solution produces a fluid that behaves more like quicksand than water applying force causes it to thicken.
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Biological life can also affect weathering. Below are listed several ways trees can affect weathering. Which affect listed below is NOT a way trees are considered to affect weathering.
Select one:
a.
Tree roots can grow through rock cracks causing the cracks to expand.
b.
Trees roots (and other vegetation) can release acids that can cause weathering of rock.
c.
Trees (and other vegetation) when decomposing can cause chemical weathering.
d.
When a tree is growing on a rock its weight can crush the rock, as a form of mechanical weathering.
When a tree is growing on a rock its weight can crush the rock, as a form of mechanical weathering is not a way trees are considered to affect weathering
Weathering is a process that breaks down or disintegrates the rocks which are present on the surface of our planet. Biological life can also affect weathering in many ways.
Tree roots can grow through rock cracks causing the cracks to expand. Sprouts can start to grow near cracks in rocks. The sprout when it grows would start to put pressure on the rocks by the roots that would penetrate them and also by the weight it exerts when it turns to a tree.
Tree’s roots (and other vegetation) can release acids that can cause weathering of rock. Plants are capable of producing acids to protect themselves against invaders like microbes and insects. When plants release acids, it would change the chemical composition of the rock that would eventually break the rock. This type of weathering is called chemical weathering
Trees (and other vegetation) when decomposing can cause chemical weathering. When trees decompose it could produce acids like carbonic acid that would help in disintegration of rocks.
When a tree is growing on a rock its weight would not directly crush the rock, as a form of mechanical weathering. Rocks with crack would be the main source of mechanical weathering by rocks.
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What is the name of the barrier that must be overcome before products are formed in a spontaneous reaction?.
Barrier that must be overcome before products are formed in a spontaneous reaction is Activation energy barrier.
A spontaneous response is a response that favors the formation of products on the conditions underneath which the response is occurring. A roaring bonfire is an instance of a spontaneous response, in view that it is exothermic (there is a decrease inside the power of the system as energy is released to the environment as warmth).
Maximum spontaneous chemical reactions are exothermic - they release warmness and heat up their surroundings: for instance: burning wooden, fireworks, and alkali metals introduced to water. When a radioactive atom splits up, it releases strength: that is a spontaneous, exothermic nuclear reaction.
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describe how a chemical change follows the law of conversation of matter.
Answer: In any chemical change, one or more initial substances change into a different substance or substances.... According to the law of conservation of matter, matter is neither created nor destroyed, so we must have the same number and kind of atoms after the chemical change as were present before the chemical change.
Explanation:
List two differences and two similarities between a recipe for baking a cake and a chemical reaction.
The main difference between a recipe for baking a cake and a chemical reaction is that baking a cake is a chemical change whereas a chemical reaction may be a chemical and physical change.
The similarities between a recipe for baking a cake and a chemical reaction is that the molecules react with each other and in both new substances are formed at the end.
How is baking a cake similar to a chemical reaction?
When you bake a cake, the ingredients pass through a chemical change. A chemical change occurs when the molecules are rearranged to form a new substance. When you start baking, you have many ingredients. Baking a cake is a chemical change because the ingredients rearrange to form a new substance which is not reversed. The sugar, flour, and eggs can't be separated from each other. The properties of the materials have changed so it is considered as a chemical change.
So we can conclude that baking a cake and a chemical reaction is different due to the presence of chemical change whereas chemical reactions have both chemical and physical change. The similarity between a recipe for baking a cake and a chemical reaction is that in both new substances are formed at the end.
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Question 8 (1 point)
Which of these is primarily composed of carbon and oxygen with significant amounts of hydrogen and nitrogen?
a. a rubber ball
b. plastic pen
c. human skin
d. pencil sharpener
The largest organ of the body, the skin is composed of water, protein, lipids, and minerals. Your skin controls body temperature and guards against infections.
Answer is C, Human Skin
Carbon, hydrogen, oxygen, and nitrogen make up what?Carbon, hydrogen, oxygen, and nitrogen make up proteins (CHON).The Elemental Four: The Building Blocks of Life.The most prevalent element in a person's body, oxygen makes up about 61% of their mass. It is not surprising that oxygen and hydrogen are two of the body's most common chemical elements given that between 60 and 70% of the body is composed of water.Only six elements make up the majority of the human body: oxygen, hydrogen, nitrogen, carbon, calcium, and phosphorus. The remaining mass is composed of sulfur, potassium, sodium, chlorine, and magnesium, which together make up around 0.85% of the total mass. These 11 components are all necessary components.About 96% of the human body is made up of just four of these: carbon (C), oxygen (O), hydrogen (H), and nitrogen (N). There are 25 identified elements that are necessary for life.To Learn more About Human Skin, Refer:
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according to the vsepr model, which molecule is predicted to have a molecular geometry that is trigonal bipyramidal?
PF5 molecule is predicted to have a molecular geometry that is trigonal bipyramidal.
Briefing:You may recognize PF5 on a VSEPR chart as a compound with a trigonal bipyramidal molecular structures once you know it has five electron pairs. The equatorial-equatorial bonds are 120 ° distant from one another, while all other bond angles are 90 °, giving it a total of two bond angles of 90 ° and 120 °.
What is the VSEPR model of molecular structure?Valence shell electron pair repulsion is the name given to the underlying concept in molecular structures (VSEPR). In essence, it states that because electron pairs are made up of negatively charged particles, they are attracted to one another and try to keep as far apart as possible.
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Where are the products in a chemical equation located?
O A. Between the reactants of the chemical equation
OB. On the left side of the arrow in the equation
O C. At the beginning of the chemical equation
D. On the right side of the arrow in the equation
A compound has the composition 50.7% C, 9.9% H, and 39.4% N. What is the empirical formula?
Step 1
Empirical formula definition:
In chemistry, the empirical formula of a chemical compound is the simplest whole-number ratio of atoms present in a compound.
-----------------
Step 2
Information provided:
Composition,
50.7 % C
9.9 % H
39.4 % N
-----------------
Step 3
Assuming a 100 grams sample:
50.7 % C => 50.7 g C
9.9 % H => 9.9 g H
39.4 % N => 39.4 g N
-----------------
Step 4
The number of moles of each element is calculated as:
(Please, use your periodic table)
50.7 g C x (1 mole C/12.01 g C) = 4.22 moles C
9.9 g H x (1 mole H/1.008 g H) = 9.82 moles H
39.4 N x (1 mole N/14.00 g N) = 2.81 moles N
-----------------
Step 5
Each number in step 4 will be divided by the smallest one of the 3. It is also needed integer numbers.
4.22 moles C/2.81 moles N = 1.5
9.82 moles H/2.81 moles N = 3.5
2.81 moles N/2.81 moles N = 1
As we need integer numbers, we will multiply all these numbers by 2 as it follows:
C => 1.5 x 2 = 3
H => 3.5 x 2 = 7
N => 1 x 2 = 2
Therefore, the empirical formula will be:
Answer:
[tex]C_3H_7N_2[/tex]Can an oxygen tank ever be half empty?
Answer is yes because to say that the tank is half empty would mean that all the oxygen molecules only occupy half or less of the tank.
The concentration f the sugar glucose (c6h12o6) in human blood ranges from 80 mg/dl before meals up to 120 mg/dl after eating. find the molarity of glucose in blood before eating. remember 1 dl = 0.1l
The molarity of glucose in blood before eating is 0.00666 M
Molar concentration is the degree of the concentration of a chemical species, especially of a solute in a solution, in phrases of quantity of a substance per unit quantity of answer. In chemistry, the most usually used unit for molarity is the variety of moles in line with liter.
We are given the human blood ranges from about 80 mg/dL before meals to 120 mg/dL after eating.
1 dL = 0.1 L
Mass of glucose before meal = 80 mg = 0.080 g
Mass of glucose after eating = 120 mg = 0.120 g
So, moles of glucose = 0.080 g / 180.16 g/ mol
= 0.000444 moles
Moles of glucose = 0.120 g / 180.16 g/mol
= 0.000666 moles
So, molarity of glucose in blood before eating = 0.000444 moles / 0.1 L
= 0.00444 M
molarity of glucose in blood after eating = 0.000666 moles / 0.1 L
= 0.00666 M
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