To solve this we must be knowing each and every concept related to ecosystem. Therefore, the maximum number of species that a system can safely support determines the carrying capacity in an ecosystem.
What is ecosystem?An ecosystem is the fundamental fundamental unit of such an environment where living and nonliving creatures interact with one another, both of which are essential for the continuation of life on Earth.
The maximum number of species that a system can safely support is known as carrying capacity. The ability of an ecosystem to replenish the food, water, environment, or other essentials that populations have to thrive are just a few examples of the numerous variables that may affect an ecosystem's carrying capacity of a specific species.
Therefore, the maximum number of species that a system can safely support determines the carrying capacity in an ecosystem.
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Why do we use an excess of aldehyde in the aldol-dehydration reaction? O to form an enolate anion O to insure that the double aldol-dehydration takes place O to react with the free radicals
O to prevent air-oxidation
Option B, Using an excess of aldehyde in the aldol-dehydration reaction is done primarily to ensure complete conversion of the reactants to the desired product.
An excess of aldehyde is used to ensure that there is a sufficient concentration of the aldehyde present in order to form the enolate anion, which is the reactive intermediate in the aldol-dehydration reaction. To achieve high yield: Using an excess of aldehyde allows for the formation of multiple enolate anions, which increases the chances of a double aldol-dehydration reaction taking place, resulting in the formation of the desired product. Using an excess of aldehyde helps aldol-dehydration to prevent this by reducing the exposure of the aldehyde to air.
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The type of bonding and the number of covalent bonds an atom can form with other atoms is determined by __________
The type of bonding and the number of covalent bonds an atom can form with other atoms is determined by number of unpaired electrons.
The number of unpaired electrons in the valence shell because covalent bond is equal to a chemical bond that involves sharing a pair of electrons between atoms in a molecule. When electrons are shared among atoms, they make a bond known as a covalent bond. Because atoms are sharing one pair of electrons, this covalent bond is known as a single bond. These atoms can do the equal aspect that the H atoms did; they proportion their unpaired electrons to make a covalent bond.
Thus, the number of unpaired electrons is useful in the type of bonding and the number of covalent bonds.
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Which has the larger ionic size Li+ or K?
Answer: K
Explanation: as we move down the group new shells are added and this increases the distance between the outermost electron and the nucleus.
If 6.4 g solid carbon dioxide were placed in the same container but it already contained air at 740 torr, what would be the partial pressure of carbon dioxide, PCO2
Given data
Mass of the piece of a solid carbon dioxide is m = 6.8 g
Volume of the solid carbon dioxide is V=4L
The temperature is T = 23°C = 296 K . The pressure of the air in the container is
740 Pho = 740 torr = atm 76
The temperature is T = 23 deg * C = 296K
The pressure of the air in the container is
Pho = 740 torr 740 760 atm
(a)The expression of ideal gas equation is given by,
PV = nRT
PV = (m/M) * RT
Where, P is the pressure in which the container after all the carbon dioxide is vaporizes.
M is the molar mass of the solid carbon dioxide (M = 44.01g / m * ol)
R is the universal gas constant R = (0.0832kJ / m * olK)
Substitute the all values in the above equation and calculate the value of pressure in which the container after all the carbon dioxide is vaporizes.
6.8 g 44.01 g/mol P(4L)= P= (0.0832 kJ/mol K) (296 K) (0.1545 mol) (0.0832 kJ/mol K) (296 K)
P = 0.951atm
(4L)Thus, the pressure in which the container after all the carbon dioxide is vaporizes is 0.951 atm.
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If you see an uncharacterized container that has a white crystalline residue on the outside, what should you do
What volume (in L) of nitrogen will be produced from the reaction of 6. 8 L of carbon monoxide?
2CO(g)+2NO(g)>N2(g)+2CO2(g)
The volume of nitrogen produced from the reaction of 6.8 L of carbon monoxide is 3.7 L
In order to determine the volume of nitrogen produced from the reaction of 6.8 L of carbon monoxide, we need to use the balanced equation for the reaction:
2CO(g) + 2NO(g) -> N2(g) + 2CO2(g)
From the equation, we can see that for every 2 moles of CO that react, 1 mole of N2 is produced. The volume of a gas is directly proportional to the number of moles of the gas present.
If the initial volume of CO is 6.8 L, we can assume that the number of moles of CO is
6.8 L / 24.45 L/mol = 0.278 mol.
Therefore, the number of moles of N2 produced would be
0.278 mol CO * (1 mol N2 / 2 mol CO) = 0.139 mol N2.
Finally, using the ideal gas law PV = nRT (where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature), we can calculate the volume of N2 produced:
V = nRT / P
V = 0.139 mol N2 * (8.314 J/mol*K) * (273 K) / (1 atm) = 3.7 L
So, the volume of nitrogen produced from the reaction of 6.8 L of carbon monoxide is 3.7 L.
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What is the E0cell? Mg 2+|Mg and Ci2|Ci
The E0cell for the halfcell that we have in the question is 3.73 V.
What is the cell potential?We have to know that the cell potential as we know it has to do with the electrical potential that is involved when we have the oxidation or the reduction of a given specie. In the case of what we have here, we have the cells that are composed of magnesium and chlorine and we want to find the electrode potential of the cells.
We must note that the basis that we can be able to use to find the electrode potential of the cell is the standard hydrogen electrode which has been assigned the value of about 0.00 V and all of the other cell potentials that we have can now be measured against this standard that has been fixed.
We have;
Magnesium half cell= -2.37 V
Chlorine half cell = + 1.36 V
Then we have;
E0cell = + 1.36 - (-2.37)
= 3.73 V
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How does reactivity vary when moving from left to right in third period of modern periodic table?
In the modern periodic table, reactivity increases when moving from left to right in the third period because metallic character decreases along a period.
The elements in the modern periodic table are arranged in 7 periods and 18 groups in a certain manner such that along a period , the metallic character of the element decreases and non-metallic character increases while on moving from top to bottom in a group, the metallic character increases and non-metallic character decreases.
The metallic character of elements depends upon its ability to lose electrons. Along a group, the size of atom increases and gradually the nuclear pull decreases so they can readily lose electrons but across a period, atomic size decreases and nuclear pull increases so they cannot lose electrons easily.
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i need help asap now answer all blanks
Answer:
2
Explanation:
You want the coefficient of silver iodide in the equation ...
_AgI +_Na₂S ⇒ _Ag₂S +_NaI
Balanced equationThe equation is balanced when the numbers of each of the species is the same on each side of the equation.
We can write four equations in the four unknowns to find the coefficients, or we can use a little guesswork.
If we suppose the coefficient of silver sulfide (Ag₂S) is 1, that tells us the coefficient of silver iodide (AgI) will be 2. If that is the case, then there are two atoms of iodine that will make the coefficient of NaI be 2. This is consistent with the coefficient of Na₂S being 1, giving one Sulfur atom on each side of the equation.
The balanced equation is ...
2AgI +Na₂S ⇒ Ag₂S +2NaI
The coefficient of silver iodide is 2.
__
Additional comment
If the reaction is ...
a·AgI + b·Na₂S ⇒ c·Ag₂S + d·NaI
We can write the relationships between the coefficients as follows. This ultimately gives rise to 3 equations in 4 unknowns, so the choice of any given coefficient is arbitrary. We choose to use the smallest integers that satisfy the conditions.
The balance for Ag is ...
a = 2c
The balance for I is ...
a = d
The balance for Na is ...
2b = d
The balance for S is ...
b = c
Then, in terms of 'a' and 'b', we have ...
a = d = 2b = 2c
For b = c = 1, a = d = 2, as we determined above.
When ammonium chloride and water interact, less energy is released from breaking the bonds in the water and ammonium chloride than what is required to form the bonds of the new substance.What is happening in the reaction
Endothermic reaction is taking place in the reaction; as ammonium chloride and water contact, less energy is generated by breaking the bonds between the two substances.
Than what is needed to create the new substance's connections. Endothermic reactions are those in which the reactants take in heat energy from their environment to create products. These reactions produce a cooling effect by bringing the temperature of the space around them lower. Endothermic physical processes are also possible; for example, ice cubes can melt into liquid water by absorbing heat energy from their environment (no chemical bonds are broken or formed). With the chemical formula NH4Cl, ammonium chloride is an inorganic substance that is a white, crystalline salt that is very soluble in water.
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How many bonds could each of the following chelating ligands form with a metal ion?
a. acetylacetone(acacH)
b. dirthylenetriamine
c. Salen
d. porphine
a. Acetylacetone(acacH) can form up to 4 bonds with a metal ion.
b. Dirthylenetriamine can form up to 4 bonds with a metal ion.
c. Salen can form up to 6 bonds with a metal ion.
d. Porphine can form up to 8 bonds with a metal ion.
Which of the following is incorrect:
A. Protons contribute to the mass of the atom
B. Electrons have a negative charge
c. Neutrons are found in the nucleus of the atom
d. Electrons, neutrons and protons all have the same mass
Answer: D
Explanation:
electrons have no mass
draw a diagram of the structure of the following atoms and state their electron arrangement:
(i) Mg
(ii)Ca
The diagrams of the arrangement of the electrons in calcium and magnesium have been shown in the image attached to this answer. There are two electrons in the valence shell of calcium.
How are the electrons arranged?We know that the electrons are the subatomic particles that we can be able to see in the shells of the atom. It is important that we ought to know that the electrons are the particles that are known to be responsible for the reactivity of the atom.
The number of the electrons that we can find in the atom would depend on the number of the protons that we have in the nucleus of the atom and this is because for the atom to be electrically neutral then we would have to have the same number of electrons and protons being in the atom as we know.
It is clear that calcium is a member of group two of the periodic table and that magnesium is also a member of group two of the periodic table.
The structures for calcium would have Ca and two dots while that of magnesium would have Mg and two dots.
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diatomic elements are important. what makes them different from other elemental substances?
Diatomic elements are important because they make up a significant portion of the Earth's atmosphere and are crucial for many biological and chemical processes.
Diatomic elements are elements that exist in nature as molecules made up of two atoms of the same element, such as H2, O2, N2, and F2.
A diatomic atom is one that cannot exist on its own. There are no single O atoms floating around in the sky. Because O atoms must exist in pairs, oxygen occurs as O2. These atoms are too unstable to live on their own.
This elements are different from other elemental substances because they are composed of multiple atoms of the same element, rather than a single atom or a mixture of different elements.
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Why does c14 have 8 neutrons?
C14 have 8 neutrons, because C have 6 atomic number and it have 14 atomic mas , where atomic mass is total of proton and neutron so the neutron of C14 is 8.
It is commonly known that Carbon-14 is an isotope of carbon. It is also known as a neutral atom. Additionally, the ratio of neutrons to protons varies among different isotopes.
The total number of protons that make up an atom's nucleus is represented by the atomic number of that atom, as is well known. We know that carbon has an atomic number of 6, a mass number of 14. It is common knowledge that mass is the product of protons and neutrons. There will thus be = 14 - 6 = 8 neutrons.
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energy transfer wet table information??
The energy is produced due to the process of beak down in the chemical process or reaction.
What is energy transfer and how can energy transfer?
That energy is stored in the bonds of the chemical compounds which include molecules and atoms. The point is released in the chemical reaction and the most power produces heat as a by-product, known as an exothermic reaction.
Energy may be released in a chemical reaction in the form of heat; that reaction is called exothermic. Reactions that require an input of heat to proceed may store some of that energy as chemical energy in newly formed bonds.
So we can conclude that Energy defined as the capacity to supply heat or do work is known as energy.
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Which of the following elements when the central atom could exhibit sp 3 d 2 hybridization?
C, S, N, B
in the given following elements when the central atom could exhibit sp 3 d 2 hybridization , Sulphur(S) can exhibit the asked configuration.
Z=16 for Sulphur
Electronic configuration [tex]1S^{2} 2S^{2} 2P^{6} 3S^{2} 3P^{2} 3D^{0}4S^{0}[/tex] here we can clearly see that the energy difference between the 3p and 3d shell is very so sulphur can exhibit the asked configuration.
Z=6 for Carbon C - [tex]1S^{2} 2S^{2} 2P^{2}[/tex]
Z=7 for Nitrogen N- [tex]1S^{2} 2S^{2} 2P^{3}[/tex]
Z=5 for Boron B- [tex]1S^{2} 2S^{2} 2P^{1}[/tex]
Here we can clearly see that the atom is very small d the shell is not present in the configuration above also the energy difference between the shells will be high as they are close to the nucleus hence the asked configuration can not be exhibited.
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Baed on the preure information in the data table, how are the preure of light and heavy particle related to the preure of the mixed particle?
Based on the pressure information in the data table, the pressure of light and heavy particle related to the pressure of the mixed particle having same pressure and same volume.
Why do heavy and light particles experience the same pressure?The lighter H₂ molecules will hit the walls more frequently and with less force because they move faster and collide with them more frequently. Because both light and heavy molecules hit the walls with roughly the same average kinetic energy at the same T, their pressure and consequent volume will be equal.
As the temperature increases, the particles gain energy and accelerate their motion. The movement of heavier particles is slower than that of lighter ones at the same temperature. Both the environment and the particles' mass affect their actual average speed.
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Complete question is" Based on the pressure information in the data table, how are the pressure of light and heavy particle related to the pressure of the mixed particle?".
A sample of a substance was heated strongly in a crucible, and the sample increased in mass.
This is evidence that
A. A gas had been evolved.
B. The substance had melted.
C. The substance had sublimed.
D. A chemical change had taken place.
O E. A change of state had occurred.
When a sample of a substance was heated strongly in a crucible, the sample increased in mass. This is evidence that a chemical change has taken place.
In a closed system, when no heat or energy is applied, the mass of a substance will remain the same. But, when heated at high temperatures, the average kinetic energy of the particles of a substance increase due to which the particles will move faster, and collide with each other and take up more space. There will be transfer of energy due to application of heat. As a result of this the mass of the sample also increases.
Hence, option D is correct
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Based on the structural formulas, which of the following identifies the compound that is more soluble in water and best helps to explain why ?
O Ethane, because the electron clouds of its molecules are more polarizable than those of propanol.
O Ethane, because its molecules can fit into the spaces between water molecules more easily than those of propanol can.
O Propanol, because its molecules have a greater mass than the molecules of ethane have.
O Propanol, because its molecules can form hydrogen bonds with water molecules.
Propanol, because its molecules can form hydrogen bonds with water molecules.
Reason:
Propanol contains a hydroxyl (-OH) group, which can form hydrogen bonds with the partially negative oxygen atoms in water molecules.This interaction increases the solubility of propanol in water.Ethane is a nonpolar hydrocarbon and it does not have any functional groups that can interact with water in this wayHydrogen bonding between propanol and water makes the solution more stable and thus more soluble.Nonpolar compounds like Ethane are not attracted to water molecules and are less likely to dissolve in them.Therefore, propanol is more soluble in water than Ethane.
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When you go to the doctor for an illness, the doctor asks you how you feel. You describe all your symptoms. Then, the doctor makes a hypothesis about which organ system is having problems. Read each set of symptoms below. Then, match each set of symptoms with the the appropriate organ system.
stomach ache, gassy, ___________________________
no appetite
sneezing all the time, runny nose, __________________________---
trouble breathing, coughing
having a very hard time remembering people's
names, feeling sad and anxious _______________________
seem to be catching every disease that comes around,
taking a long time to get better ________________________-
1. Respiratory System
2.Nervous System
3.Immune System
4.Digestive System
Stomach ache, gassy ,no appetite is related to problems with digestive tract while sneezing all the time, runny nose is related to respiratory system while having a very hard time remembering people's is related to nervous system while seeming to be catching every disease that comes around,taking a long time to get better is related to immune system.
What is digestive tract?
It consists of the gastrointestinal tract along with the accessory organs which are present in digestion process . It involves the breakdown of complex food into smaller components which can be easily assimilated and absorbed by the body.
The digestion process has 3 phases: cephalic phase , gastric phase and intestinal phase.Cephalic phase begins with secretion of gastric juices from gastric glands in response to sight and smell of food.It involves chewing and chemical breakdown of food by the action of digestive enzymes ,saliva in the mouth contain enzymes like lipase and amylase which are secreted by the salivary and serous glands present on the tongue.
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A ring stand is used to ________ devices during laboratory procedures.
A ring stand is used to hold glassware devices during laboratory procedures.
Ring stands and accessories can make your lab experiments much easier if you are studying chemistry or physics.
A ring stand and its accessories are versatile pieces of equipment that will improve your hands-on activities by allowing you to conveniently heat beakers, flasks, test tubes, and other glassware over an alcohol burner, as well as set up physics apparatus such as moveable pulleys and inclined planes.
Each accessory is supported by a heavy base and an upright rod on the ring stand. To support additional equipment, a ring support is attached to the stand. Glassware is supported above an alcohol burner by wire gauze resting on the ring. To support funnels, crucibles, and evaporating dishes, the triangle rests on the ring. Burettes and test tubes are held in the burette clamp.
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What is the importance of CO2 and O2 in water?
The importance of the carbon dioxide, CO₂ and the oxygen O₂ in the water is they both are important for the aquatic animals and for the aquatic plant.
The CO₂ and O₂ are both important for the aquatic animals and also for the aquatic plants. the concentration of the oxygen in to the water is important for the aquatic animals that the dissolved oxygen for the respiration. the carbon dioxide will be more soluble in water than the oxygen in the water.
The carbon dioxide forms the carbonic acid in the water. the carbon dioxide is useful for the aquatic plants for the growth.
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H2O2 → H2O+ ½ O2
Hydrogen peroxide decomposes to produce water and oxygen according to the equation above. An experimentally determined graph for the first-order decomposition of hydrogen peroxide is provided below.
Which of the following best identifies the rate constant k for the reaction based on the information in the plot of ln[H2O2] versus time (t)?
O k = ln[H2O2] at t = 0s
O k = ln[H2O2] at t = 500s
O k = −(slope of plot)
O k = −1/(slope of plot)
k = -1/(slope of plot) is the correct answer to identify the rate constant k for the reaction based on the information in the plot of ln[H2O2] versus time (t).
The equation for the first-order decomposition of hydrogen peroxide is H2O2 → H2O+ ½ O2The graph provided is a plot of ln[H2O2] versus time (t)The rate constant (k) is a measure of how fast a reaction occursIn the context of first-order reactions, the rate constant is related to the slope of a plot of ln[H2O2] versus time (t)Therefore, the rate constant can be determined by finding the slope of the plot and then using the formula k = -1/(slope of plot)
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Predict the molecular geometries of the following species, respectively: IF3, TeF4, XeF51+.
a. T-shaped, see-saw, square pyramidal
b. trigonal planar, tetrahedral, square pyramidal
c. trigonal pyramidal, tetrahedral, see-saw
d. trigonal planar, see-saw, square planar
e. trigonal pyramidal, square planar, linear
a. T-shaped, see-saw, square pyramidal.IF3: The Lewis structure of IF3 consists of a central I atom, which is surrounded by three F atoms.
IF3: The Lewis structure of IF3 consists of a central I atom, which is surrounded by three F atoms. The three F atoms are arranged in a symmetric, T-shaped geometry.
TeF4: The Lewis structure of TeF4 consists of a central Te atom, which is surrounded by four F atoms. The four F atoms are arranged in a symmetric, trigonal planar geometry.
XeF5+: The Lewis structure of XeF5+ consists of a central Xe atom, which is surrounded by five F atoms. The five F atoms are arranged in a symmetric, square pyramidal geometry.
a. T-shaped, see-saw, square pyramidal.
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why was the bohr model replaced
To solve this we must be knowing each and every concept related to atom. Therefore, Bohr's model was abandoned since it lacked explanatory, descriptive, and predictive ability.
What is atom?Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.
In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. Bohr's model was abandoned in favor of the quantum mechanical model since it lacked explanatory, descriptive, and predictive ability.
Therefore, Bohr's model was abandoned since it lacked explanatory, descriptive, and predictive ability.
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What is the mass of 2.30 x 10^24 particles of water, H₂O?
The mass of 2.30 x 10²⁴ particles of water (H₂O) is 60.84 grams.
What exactly is mass defined as?The amount of matter in a particle or object is represented by its mass, which is denoted by the symbol m. In the International System (SI), the kilograms serves as the default unit of mass (kg).
The formula N = n L describes the relationship between a substance's number of particles and number of moles.
n also defined using the equation n = m/M
N = n L
N = m/M L
Then substitute N and L values,
2.30×10²⁴ = m/M × 6.02×10²³
Molar mass of water = 18
2.30×10²⁴ = m/18 × 6.02×10²³
2.30×10²⁴/6.02×10²³ = m/18
3.38 = m/18
m = 3.38 × 18
m = 60.84grams.
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Tropospheric ozone is rapidly consumed in many reactions, including:
SO3(g) + NO(g) --------> NO2(g) + O2(g)
Use the following data to calculate the instantaneous rate of the preceding reaction at t = 0. 000 s and t = 0. 0520 s. Express your answers to three significant figures.
Time (s) [NO] (M)0. 000 2. 00 x 10^-80. 0110 1. 80 x 10^-80. 0270 1. 60 x 10^-80. 0520 1. 40 x 10^-80. 1020 1. 20 x 10^-8
Part 1:
For t = 0. 000 s: ________ M/sPart 2:For t = 0. 052 s: _________ M/s
Part-1 The instantaneous rate at 0.000s is 1.8 ×10⁻⁷m/s.
Part-2 The instantaneous rate at 0.0s is 5.3×10⁻⁸m/s.
What do the terms average rate and instantaneous rate mean?The concentration change over a chosen time period is the average rate. When you take the measurements makes a difference. The instantaneous rate is the rate that exists at a specific time. The solution is found at that point by determining the slope of the tangent to the concentration vs. time curve.
Given chemical reaction,
SO₃(g) + NO(g) --------> NO₂(g) + O₂(g)
t = 0. 000s
instantaneous rate = 1.38×10⁻⁸ - 2.0×10⁻⁸/0.011 - 0.000
instantaneous rate = 1.8 ×10⁻⁷m/s
Therefore the instantaneous rate at 0.000s is 1.8 ×10⁻⁷m/s.
for t = 0.052s,
instantaneous rate = 1.2×10⁻⁸ - 1.6×10⁻⁸/0.102 - 0.027
instantaneous rate = 5.3×10⁻⁸m/s.
Therefore the instantaneous rate at 0.0s is 5.3×10⁻⁸m/s.
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How many grams is 0.5 moles?
0.5 moles of carbon weigh 6.0055 grams.
One of the chemical elements is carbon. The letter C stands for carbon, and the letter g stands for grams. As a result, 0.5 moles of carbon per gram is equivalent to 0.5 moles of carbon per gram, 0.5 moles of carbon per gram, and 0.5 moles of C per gram.
Carbon has a 12.011 atomic mass. Thus, one mole of carbon has a mass of 12.011 grams (12.011 g/mol). We multiply 0.5 moles of carbon by 12.011 to get grams, and vice versa.
no. of Grams = Moles of Carbon x 12.011
=0.5 × 12.011 = 6.0055
0.5 moles of carbon equal 6.0055 grams.
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The complete question is
How many grams is 0.5 moles of carbon
Analysis of a compound formed between magnesium and nitrogen showed it contained 14.4g of magnesium and 5.6.g of nitrogen.
What is the empirical formula of the compound?
A Mg2N3
B Mg3N2
CMg4N6
D Mg6N4
And why is it that way?
Answer:
B. Mg3N2
Explanation:
There are 20.0 grams total material (14.4g Mg and 5.6 g N). We can convert grams into moles of each element by dividing by that element's molar mass (g/mole) to yield the number of moles of each element. To find the empirical formula, we need to convert the moles of each to a whole number by using a fracor that provides a whole number for each element. 5 works well, and we get 0.6x5 = 3 Mg atoms and 0.4x5 = 2 N atoms.
Mass % g/mole grams moles Factor of 5
Mg 72.00% 24.305 14.4 0.6 2.962 or 3
N 28.00% 14.007 5.6 0.4 1.999 or 2
100.0% 20 1.0
There are 3 Mg and 2 N atoms per molecule. The empirical formula is Mg3N2.