Forest is a habitat for many plants and animals because it provides a suitable environment for them.
Forest is a habitat for many plant life and animals as it offers a appropriate environment for them. As an instance, neem, Sheesham, Palash, tiger, porcupine, elephants, jackal and so forth. The ground beneath the tree of the forest is the forest floor.
It causes habitat destruction, accelerated chance of predation, reduced food availability, and lots greater. As a result, some animals lose their homes, others lose meals assets – and ultimately, many lose their lives. In reality, deforestation is one of the essential causes of extinction.
Weather trade also alters the life cycles of flora and animals. as an instance, as temperatures get warmer, many plant life are starting to develop and bloom earlier inside the spring and live to tell the tale longer into the fall. A few animals are waking from hibernation sooner or migrating at different instances, too.
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Of the following transitions in the Bohr hydrogen atom, the ________ transition results in the absorption of the highest-energy photon.
Of the following transitions in the Bohr hydrogen atom, the ________ transition results in the absorption of the highest-energy photon.
n = 7 → n = 4
n = 3 → n = 5
n = 3 → n = 2
n = 6 → n = 3
The highest energy transition in the hydrogen atom among the following is from n=6 to n=3. Hence option d is correct.
What is Bohr model?Bohr model of atom proposed the modern atomic model based on the interpretations from quantum mechanics. According to this model, electrons are revolving around the atom through circular paths of fixed energy.
The energy of the se levels and the momentum of electrons can be determined using Bohr's equation. Electrons can transit between these energy levels. The Rydberg formula for the transition is written as follows:
[tex]\frac{1}{\lambda} = R [\frac{1}{n_{1}^2} -\frac{1}{n_{2}^2} ][/tex]
Here, R is the Rydberg constant and n1 and n2 be the first and second energy levels.
The transition n=6 to n=3 gives the higher value for this equation. Hence, this transition results highest energy absorption.
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Which functional groups are present in carbohydrates?
alkenes, alkynes, and phenyl groups
ethers, esters, and amides
carboxylic acids and amino groups
aldehydes, ketones, and hydroxyl groups
The functional groups are present in the carbohydrates is aldehydes , ketone , and hydroxyl groups.
Carbohydrates are the essential for living thing . they provide energy to living things. simple carbohydrates are : monosaccharides , disaccharides, oligosaccharides. Carbohydrates involves in fat metabolism. carbohydrates are also called as starch , simple sugars etc. carbohydrates found in foods . sugar is a source of carbohydrates. there are good carbohydrates which is high in nutrients moderate in calories. the bad carbohydrates are low in nutrients and high in calories.
Thus, The functional groups are present in the carbohydrates is aldehydes , ketone , and hydroxyl groups.
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covert 3.20 bar to atm
Taking into account the change of units, the 3.20 bar in atm is 3.15815 atm.
Rule of threeThe rule of three is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.
If the relationship between the magnitudes is direct, the direct rule of three must be applied. To solve a direct rule of three, the following expression must be followed, being a, b and c known data and x the variable to be calculated:
a ⇒ b
c ⇒ x
So: x= (c×b)÷a
The direct rule of three is the rule applied in this case where there is a change of units.
Conversion of units in this caseYou can apply the following rule of three: if 1.01325 bar equals 1 atm, 3.20 bar equals how many atm?
1.01325 bar ⇒ 1 atm
3.20 bar ⇒ x
So: x= (3.20 bar× 1 atm)÷ 1.01325 bar
Solving:
x= 3.15815 atm
In summary, the pressure is 3.15815 atm.
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The reaction shown has first order kinetics:
2H2 O2 (1) —> 2H2 O (1) + O2 (g)
If originally a solution of 0.600 M H2O2, its concentration was found to be 0.0750 M after 54.0 min.
In how many minutes will the concentration be 0.300M?
A) 6.80
B) 18.0
C) 14.0
D) 28.0 E) 54.0
Option B. 1n 18 minutes the concentration of a solution of 0.600 M changes to 0.300M.
An order of first-order kinetics in which the rate of the reaction relies upon the concentration of only one reactant, and is proportional to the amount of the reactant. it could be represented via the equation, charge = kA, in which ok is the reaction fee steady, and A is the concentration of the reactant.
Calculation:-
T = 2.303/k log a/(a-x)
K = 2.303/T log a/(a-x)
= 2.303/54 log(0.600/0.0750)
K = 2.303/54 log 8
= 2.303/54 × 0.9
= 0.038
new concentration = 0.300M
T = 2.303/k log a/(a-x)
= 2.303/ 0.038 log 0.600/(0.300)
= 0.693/0.038
= 18.2 minutes
or 18 minutes approx.
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A known reaction has Change in U= 38 kJ/mol. The reaction is done at constant pressure and you measure the amount
of work done to be w=+2 kJ/mol. What is q in kJ/mol?
q = 36kJ/ mol amount of heat is produced according to 1st law of Thermodynamics
What is 1st law of Thermodynamics ?
The first law of thermodynamics states that energy is neither created nor destroyed, only its form can be changed. In any system, energy transfer involves exceeding control limits by mass, external work, or heat transfer beyond limits. These cause changes in the stored energy within the control volume.
The first law of thermodynamics states that heat is a form of energy and therefore thermodynamic processes obey the law of conservation of energy. This means that it cannot generate or destroy thermal energy.
ΔU = q + w
38kJ/ mol = q + 2kJ/mol = 36kJ/mol
q = 36kJ/ mol amount of heat is produced according to 1st law of Thermodynamics
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When 15.6 mL of 0.500 M Silver (1) Nitrate is added to 12.5 mL of 0.300 M
Ammonium chloride, how many grams of solid product (if any) formed?
Select one:
A. 0.537 g
B. 1.65 gx
C. NR
D. 1.11 g
The grams of solid product is 0.537 g.
Hence, Option A is correct.
The above equation can be solved by
The Symbol Ag used for Silver originates from the Latin word “Argentum
AgNO3 + NH4Cl ? AgCl + NH4NO3
(15.6 mL) x (0.500 M AgNO3) = 7.8 m mol AgNO3
(12.5 mL) x (0.300 M NH4Cl) = 3.75 m mol NH4Cl
7.8 m mol AgNO would react completely with 7.8 x (1/1) = 7.8 mol NH4Cl, but there is not that much NH4Cl present, so NH4Cl is the limiting reactant.
(3.75 m mol NH4Cl) / (1000 m mol/mol) x (1/1) x (143.3214 g AgCl/mol) = 0.537 g AgCl.
Hence, The grams of solid product is 0.537 g.
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5. What process occurs when large swaths of forest are cut down, damaging the landscape in an area?
combustion
deforestation
denitrification
nitrogen-fixation
Answer:
deforestation
Explanation:
deforestation is clearing Earth's forests on a massive scale, often resulting in damage to the quality of the land. Forests still cover about 30 percent of the world's land area, but swaths the size of Panama are lost each and every year.
I need to know what’s the answer for the check point question on the picture. please help me.
In the combustion of methane the are reactants are CH₄(g) and O₂(g). The products are CO₂(g) and H₂O(g) .
Combustion is process in which the substance react with the oxygen to produce heat. In the combustion of , the methane , CH₄ is burnt in the presence of oxygen, O₂ produce carbon dioxide, CO₂ and water H₂O. it is very useful as fuel source. the chemical reaction is given as follows :
CH₄(g) + 2O₂(g) ----> CO₂(g) + 2H₂O(g) . + heat + light
Thus, In the combustion of methane the are reactants are CH₄(g) and O₂(g). The products are CO₂(g) and H₂O(g).
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hcn is classified as a weak acid in water.this means that it produces
HCN is classified as a weak acid because it partially ionizes in water to produce hydrogen ions as the only positive ion.
What is an acid?There are several definitions for acids.
It is a substance that turns blue litmus paper to red when wet.It is any substance whose pH lies between 0 and 7.It is a substance that when ionizes in water, produces hydrogen ions as the only positive ion.HCN ionizes in water according to the following equation:
[tex]HCN < --- > H^+ + CN^-[/tex]
Because the HCN is only partially ionized and not a complete ionization, it is said to be a weak acid because hydrogen ion is still formed as the only positive ion.
Strong acids produce hydrogen ions as their only positive ions but are completely ionized in water, unlike weak acids.
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When chromium changes from an oxidation state of +3 to that of +6, the Cr3+ must:
A. gain 6 electrons B. lose 6 electrons
C. lose 3 electrons D. gain 3 electrons
When chromium changes from an oxidation state of +3 to that of +6, the Cr3+ must: lose 3 electrons.
So option C is correct.
What is an oxidation state?
The oxidation state or oxidation number, is the hypothetical charge of an atom if all of its bonds to different atoms were fully ionic which describes the degree of oxidation of an atom in a chemical compound. In any concept, the oxidation state may be positive, negative or zero.
When chromium changes from an oxidation state of +3 to + 6 it loses 3 electrons during the process. For example oxidation state of elemental atoms such as sodium, magnesium, iron is zero.
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While bowling, Sean stands 19 meters away from the pins and throws his bowling ball down the lane. The ball rolls at a constant velocity of 7.2meterspersecond toward the pins. How far will the ball roll in 2.5seconds?
17. 1s² 2s² 2p 3s² 3p6 4s² 3d¹0 4p65s¹ symbol?
Which element would be expected to have properties similar to antimony
Answer:
N, P, As, Bi, Mc
Explanation:
Similar chemical properties are usually found within the same column of the periodic table.
Antimony is Sb, which is in column 15.
Therefore all the elements in column 15, including N, P, As, Bi, Mc, should have similar chemical properties
Name one thing that we use in everyday life that uses either a magnetic field or an electric field.
A common thing in everyday life that uses the magnetic field or an electric field is the transformer.
What is a magnetic field?The term magnetic field is the region that is around a magnet where there is a the influence of a magnetic. Also, the region around a charge where the influence of the charge can be felt is called the electric field.
Most of the devices that we have at home do have a transformer such as a radio set and a television set. The transformer that is in this appliance causes the regulation of voltage in the appliance.
The transformer works on the principle of the magnetic field and the electric field.
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Calculate the volume (mL) of a 2.50M NaOH solution are required to make 725 mL of a 0.150M NaOH solution?
The volume of a 2.50M NaOH solution required to make 725 mL of a 0.150M NaOH solution is 43.5mL.
How to calculate volume of a solution?The volume of a solution can be calculated using the following expression:
CaVa = CbVb
Where;
Ca = initial concentrationCb = final concentrationVa = initial volumeVb = final volumeMolarity is the concentration of a substance in solution, expressed as the number moles of solute per litre of solution.
According to this question, 2.50M NaOH solution are required to make 725 mL of a 0.150M NaOH solution. The volume required can be calculated as follows:
2.5 × Va = 725 × 0.150
2.5Va = 108.75
Va = 43.5mL
Therefore, 43.5mL is the volume of the solution.
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A single molecule of water contains 1 oxygen atom and 2 hydrogen atoms
- 1 mole of H2O
How many molecules and how many atoms?
If 2.186×10-2 mol of NH3 gas has a volume of 365 mL at 32°C, what would be the volume of 2.186×10-2 mol of N2 gas under identical temperature and pressure conditions?
The volume of the 2.186×10⁻² mole of N₂ gas under identical temperature and pressure conditions will also be 365 mL
How do I determine the volume of N₂?We'll begin by obtaining the pressure of NH₃. This can be obtained by using the ideal gas equation as illustrated below:
Mole of NH₃ (n) = 2.186×10⁻² moleVolume (V) = 365 ml = 365 / 1000 = 0.365 L Temperature (T) = 32 °C = 32 + 273 = 305 KGas constant (R) = 0.0821 atm.L/Kmol Pressure (P) = ?PV = nRT
Divide both sides by V
P = nRT / V
P = (2.186×10⁻² × 0.0821 × 305) / 0.365
P = 1.5 atm
Finally, we shall determine the volume of the N₂ under identical (i.e the same) temperature and pressure conditions. This is illustrated below:
Mole of N₂ (n) = 2.186×10⁻² moleTemperature (T) = 32 °C = 32 + 273 = 305 KPressure (P) = 1.5 atm Gas constant (R) = 0.0821 atm.L/Kmol Volume (V) = ?PV = nRT
Divide both sides by P
V = nRT / P
V = (2.186×10⁻² × 0.0821 × 305) / 1.5
V = 0.365 L
Multiply by 1000 to express in liters
V = 0.365 × 1000
V = 365 mL
Thus, the volume is 365 mL
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4) Why must the exact same mass of solution (100.0 g) be used in the neutralization reactions?
Answer:for making the text look colored and bold
Explanation:It can reacting differently with different mass solution, it also depends on what concentration you're measuring, and what reaction
a sample of an unknown gas has a volume of 8.00L at 1.00 atm and 25.0°C. How many moles of gas are present? please explain in full detail so i can learn it
0.33 mol is the amount of the unknown gas present.
What amount of moles of the gas is present?The ideal gas law states that "the pressure multiplied by volume is equal to moles multiply by the universal gas constant multiply by temperature.
It is expressed as;
P × V = n × R × T
Where P is pressure, V is volume, n is the amount of substance, T is temperature and R is the ideal gas constant ( 0.08206 Latm/molK ).
Given the data in the question;
Volume of gas V = 8.00lPressure P = 1.00atmTemperature T = 25°C = ( 25 + 273.15 )K = 298.15KAmount of gas n = ?Plug the given values into the ideal gas law formula and solve for n ( amount of gas in moles ).
P × V = n × R × T
n = ( P × V ) / ( R × T )
n = ( 1.00atm × 8.00L ) / ( 0.08206Latm/molK × 298.15K )
n = 8.00Latm / 24.466189Latm/mol
n = 0.33 mol.
Therefore, the amount of gas is 0.33 mol.
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Read the chemical equation shown.
3SO2 + 2HNO3 + 2H₂O → 3H₂SO4 + 2NO
Which statement is true about this chemical equation?
OH (hydrogen) was oxidized and S (sulfur) was reduced.
OH (hydrogen) was reduced and N (nitrogen) was oxidized.
OS (sulfur) was oxidized and N (nitrogen) was reduced.
OS (sulfur) was reduced and N (nitrogen) was oxidized.
The statement "OH (hydrogen) was oxidized and S (sulfur) was reduced" is true about this chemical equation.
This chemical reaction is between Sulfur dioxide and nitric acid along with water. When nitric acid reacts with Sulfur dioxide, it gives sulfuric acid and nitrogen monoxide.
In the reaction, the hydrogen atoms in H₂O are oxidized to form H₂SO₄, and the sulfur atoms in SO₂ are reduced to form H₂SO₄.
Therefore, the OH from the water molecule gets oxidized to give out Sulfuric acid. Likewise, the Sulfur from Sulfur dioxide reduces to form the product that is sulfuric acid.
Therefore, the best option that suits the reaction is OH (hydrogen) was oxidized and S (sulfur) was reduced.
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Answer:
I believe the above answer is correct after my test i will let everyone know.
Explanation:
Which of the following is an example of an unbalanced force?
A A computer on a table
B A man leaning against a wall
C A girl serving a volleyball
D Fruit in a bowl
Explanation:
C
as the girl applies a resultant force on the volleyball causing it to accelerate, there's an unbalanced force acting on the ball.
For Silicon atoms, which I value will show exceptionally large increase over preceding IE values IE1, IE2, IE3, IE4, IE5, IE6
The ionization energy of the fifth electron IE5 would be exceptionally large.
What is the exceptionally large ionization energy?We know that the ionization energy is the energy that is required to remove an electron from an atom. This is the energy that must be supplied in order to make the electron to be able to escape the attractive force of the nucleus of the atom.
We know that Silicon has four electrons in the outermost shell. It is known that electrons that are in the same shell would have relatively close values of ionization energy.
The ionization energy values IE1, IE2, IE3, IE4 all belong to the outermost shell hence we would have an exceptionally large increase over preceding IE values at IE5.
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what has the biologist Rahul Kumar came to India to find
It is to be noted that Rahul Kumar the biologist came to India to find problems that he can solve using his knowledge in Biology.
Who is Rahul Kumar?Rahul Kumar, an Indian and the son of a migrant worker from Bihar, graduated with honors from IIT Roorkee and is currently on his way to the United States to pursue his PhD at the University of Utah.
A biologist is a scientist who undertakes biological study. Biologists are interested in researching all forms of life on Earth, whether they be single cells, multicellular organisms, or communities of interacting individuals. They often specialize in a single field of biology and have a specialized research emphasis.
The majority of biologists work full-time at government agencies, private research laboratories, medical testing facilities, higher education institutions, or other research facilities.
Physician's assistants, radiation and nuclear medicine technologists, and registered nurses are among the hospital employment available to those with a bachelor's degree in biology. These positions can also be found in clinics, physicians' offices, nursing homes, rehabilitation institutions, government organizations, the military, and other settings.
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During complete combustion, natural gas combines with oxygen to produce _____.
methane and water vapor
carbon dioxide and water vapor
carbon monoxide and water vapor
carbon dioxide and carbon monoxide
Answer:
During complete combustion, natural gas combines with oxygen to produce carbon dioxide and water vapor.
Explanation:
A fuel undergoes a complete combustion process when it swiftly combines with oxygen (O2), which then forms carbon dioxide (CO2) and water (H2O).
The substances sodium (Na), oxygen (O₂), and sodium oxide (Na2O) participate in this chemical reaction:
4Na + O2 → 2Na₂O.
Which statement best describes the reaction?
Sodium oxide is created by the chemical reaction statement best describes the reaction .
What is chemical reaction ?
Chemical reactions happen absolutely everywhere. While we sometimes associate chemical reactions with the sterile environment of test tubes and laboratories, nothing is farther from the truth. In fact, a vast number of transformations are creating a dizzying and almost incomprehensible series of new matter and energy changes in our world every second of every day.
In nature, chemical reactions are much more uncontrollable and sometimes much more complex than in the laboratory. Chemical reactions usually occur as needed. The fire raging in the forest, the slow rusting process of iron over the years in the presence of oxygen and water, or the delicate ripening of the fruit on the tree, the process of transforming various chemicals... ( The transformation of one group of substances (products) into another group of substances (products) is a so-called chemical reaction.
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In the lac operon how do multiple proteins form from the same mRNA? due to RNA splicing due to high
due to high functioning spliceosome due to multiple start and stop codons
due to presence of operator sequences
In the Lac operon, multiple proteins form from the same mRNA due to RNA splicing.
What is an operon?An operon is a cluster of genes that are transcribed from the same promoter to give a single messenger RNA (mRNA) molecule that contains multiple coding sequences that are used to make multiple proteins.
Such an mRNA molecule is called a polycistronic mRNA.
An example of an operon is the Lac operon which encodes the genes used to produce the various enzymes required for the metabolism of lactose.
Three of the enzymes in the lac operon are grouped together and are known as lacZ, lacY, and lacA.
Alternative splicing of the mRNA produces the different proteins in operons.
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A sample of gas is placed in a 25.0 L sealed container at STP. The
container is heated to 25 C. What will be the pressure in the container?
The pressure of a sample of gas placed in a 25.0L container at STP is 0.98atm.
How to calculate pressure?The pressure of an ideal gas can be calculated by using the following formula:
PV = nRT
Where;
P = pressureV = volume n = number of molesT = temperatureR = gas law constantAccording to this question, a sample of gas is placed in a 25.0 L sealed container at STP. The container is heated to 25°C. The pressure in the container is as follows:
P × 25 = 1 × 0.0821 × 298
25P = 24.47
P = 0.98atm
Therefore, 0.98atm is the pressure of the gas
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Calculate the molarity of 25.7 g of MgS in 919 mL of solution.
What do you mean by molarity?
Molarity-Molarity is a term that is used to show concentration of the solution . It is different from molality as it is expressed in mol per L , whereas molality is expressed in mol per kg.
Given:
Mass of Mgs is 25.7 g.Volume of the solution is 919 ml.The mole of Mgs is calculated as follows :
Mole= Mass / Molar Mass
= 25.7g/56.38 g/mol
= 0.455 mol.
The molarity of Mgs solution is calculated as follows :-
Molarity =Mole/Volume ( L )
=0.455mol/919ml* 1000ml/1L
=0.495M
Thus, the molarity of the solution is 0.495 M.
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a beam of electrons,neutrons and protons can be separated by passing them through an electric field.
Which direction does each particle follow?
Answer:
the protons go in the direction of C, the electrons go in the direction of A and neutrons go the direction of B.
Explanation:
this is because electrons get attracted to positively charged objects and protons get attracted to negatively charged objects and neutrons have no attraction towards any charge.
a carbon is found to form two oxide, which contain 42.9% and 27.3%carbon respectively, show that these figure illustrate the law multiple proportional
The empirical formulas of the two oxides are CO and [tex]CO_2[/tex] respectively. Thus, the figures illustrate the law of multiple proportions.
Law of multiple proportionsThe law of multiple proportions states that when two elements form more than one compound, the ratios of the masses of the second element which combine with a fixed mass of the first element will always be ratios of small whole numbers.
Now, let's see if the figures quoted in the problem obey this law:
The first oxide:
C = 42.9
O = 100-42.9
= 57.1
The equivalent mole of each atom would be:
C = 42.9/12
= 3.56
O = 57.1/16
= 3.56
Thus, the empirical formula of the first oxide is CO.
The second oxide:
C = 27.3
O = 100 - 27.3
= 72.7
The equivalent mole of each atom will be:
C = 27.3/12
= 2.27
O = 72.7/16
= 4.54
Dividing the moles by the smallest mole
C = 2.27/2.27
= 1
O = 4.54/2.27
= 2
Thus, the empirical formula of the second oxide is [tex]CO_2[/tex].
In other words, the figures quoted obeys the law of multiple proportions.
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