Gentrification is a process of changing the character of a neighborhood through the influx of more affluent residents and businesses. ... The gentrification process is typically the result of increasing attraction to an area by people with higher incomes spilling over from neighboring cities, towns, or neighborhoods.
Gentrification is a socio-economic process where lower-status individuals' improvements to a neighborhood attract wealthier residents, leading to increased rents and potential displacement of the original residents. This can be explained economically by the Rent Gap Theory and is influenced by various factors, including lifestyle changes and media representation.
Explanation:Gentrification is a complex process often starting when lower social status individuals invest their effort (sweat equity) into revitalizing neighborhoods. Over time, these improvements make the neighborhood more appealing to middle and upper-class residents who begin moving in. This shift can lead to a rise in rents and property values, sometimes forcing existing working-class residents out due to affordability issues, a phenomenon referred to as displacement.
Displacement is a serious downside of gentrification, where less politically powerful citizens, often including local businesses, are pushed out from their homes and commercial spaces. This is particularly true in cities without rent control laws. Gentrification is not merely a process defined by the social or racial makeup alterations, but it is multifaceted, involving cultural shifts, economic pressures, real estate investments, and sometimes, unfortunately, an increase in tensions and violence, as seen in historical events like Tompkin's Square Park Riot.
From an economic standpoint, Neil Smith's Rent Gap Theory proposes that gentrification occurs when there's a significant difference between the current value of property and its potential value post-investment. This gap attracts investors to rejuvenate rundown areas. However, not all gentrification efforts are driven purely by economic incentives; they may also be influenced by changing lifestyles, demographic shifts, and even cultural representation in media.
how many sig figs are in 0.0050340
What contribution did these scientists make to atomic models of the atom?
a. Dalton
b. Thomson
c. Rutherford
d. Bohr
Dalton proposed the atomic theory, Thomson discovered the electron and proposed the Plum Pudding Model, Rutherford conducted the gold foil experiment and concluded the existence of a dense, positively charged nucleus, and Bohr introduced the concept of energy levels or shells in the atom.
Explanation:Dalton: John Dalton proposed the atomic theory, which states that atoms are indivisible and indestructible building blocks of matter. He believed that all atoms of the same element are identical and each element is made up of atoms with unique properties.
Thomson: J.J. Thomson discovered the electron and proposed the Plum Pudding Model, which suggested that atoms are composed of a positively charged mass with negatively charged electrons embedded in it.
Rutherford: Ernest Rutherford conducted the famous gold foil experiment and concluded that atoms have a small, dense, positively charged nucleus at the center and electrons moving around it in a vast empty space.
Bohr: Niels Bohr introduced the idea of energy levels or shells in the atom. He proposed that electrons exist in fixed orbits around the nucleus and can jump between energy levels by absorbing or emitting energy in discrete amounts.
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FeSO4 • 7H2O
What is the percent by mass of water in the hydrate?
%
What is the percent by mass of the anhydrous salt in the hydrate?
%
Answer:
The percent by mass of water in the hydrate is 45.4%
The percent by mass of the anhydrous salt in the hydrate is 54.6%
Explanation:
The percent by mass of water in the hydrate is 69.23% and the percent by mass of the anhydrous salt in the hydrate is 54.44%.
To find the percent by mass of water in the hydrate, we can use the following formula:
percent by mass of water = (mass of water)/(mass of hydrate) * 100%
Mass of water = 7 moles of H₂O * 18 g/mol
= 126 g
Mass of hydrate = 1 mole of FeSO₄ • 7H₂O
= 278 g
Plugging these values into the formula, we get:
percent by mass of water = (126 g)/(278 g) * 100%
= 45.56%
We can also find the percent by mass of the anhydrous salt in the hydrate by subtracting the percent by mass of water from 100%.
percent by mass of anhydrous salt = 100% - 45.56%
= 54.44%
Therefore, the percent by mass of water in the hydrate is 69.23%, and the percent by mass of the anhydrous salt in the hydrate is 54.44%.
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Calculate the molar mass of NaHCO3. (Round to the nearest
tenth)
g/mol
Answer:
84.0 g/mol
Explanation:
Molar mass of NaHCO₃ = ?
Solution:
Molar mass is the sum of masses of all atom present in formula.
Molar mass of sodium = 23 g/mol
Molar mass of hydrogen = 1.008 g/mol
Molar mass of carbon = 12 g/mol
Molar mas of Oxygen = 16 g/mol
Molar mass of NaHCO₃ = 23 + 1.008 + 12 + 16× 3
Molar mass of NaHCO₃ = 23 + 1.008 + 12 + 48
Molar mass of NaHCO₃ = 84.008 g/mol
To the nearest tenth = 84.0 g/mol
Answer:
84 g/mol.
Explanation:
Hello,
In this case, for us to compute such mass, we consider the atomic mass of sodium, hydrogen, carbon and oxygen as well as the three as the oxygen's subscript indicating there are three oxygens. Thus, the molar mass results
[tex]M=m_{Na}+m_{H}+m_{C}+*3m_{O}=23g/mol+1g/mol+12g/mol+3*16g/mol\\M=84g/mol[/tex]
Best regards.
Elements near the noble gases tend to form ___ bonds.
A.ionic
B.covalent
C. Metallic
Answer:
ionic bond
Explanation:
Noble gases have complete octet. The elements near to noble gases gain electrons and get stable electronic configuration by completing the octet.
Consider the example of halogen element:
Ionic bond:
It is the bond which is formed by the transfer of electron from one atom to the atom of another element.
Both bonded atoms have very large electronegativity difference. The atom with large electronegativity value accept the electron from other with smaller value of electronegativity .
For example:
Sodium chloride is ionic compound. The electronegativity of chlorine is 3.16 and for sodium is 0.93. There is large difference is present. That's why electron from sodium is transfer to the chlorine. Sodium becomes positive and chlorine becomes negative ion. Chlorine have seven valance electrons and sodium have one valance electron. To complete the octet sodium lose its one electron and chlorine accept one electron and form ionic compound.
Final answer:
Elements near the noble gases tend to form covalent bonds, which occurs between nonmetal elements through the sharing of electrons.
Explanation:
Elements near the noble gases on the periodic table tend to form covalent bonds. Covalent bonds form between nonmetal elements, typically resulting from the sharing of electrons. In comparison, ionic bonds usually occur between a metal and a nonmetal, driven by the electrostatic forces between ions of opposite charge.
Another type of bond is the metallic bond, which is found within solid metals where each metal atom is bonded to several neighboring atoms and the electrons are free to move throughout the structure. Correct answer to Q 25: Covalent bonds form between Nonmetal to Nonmetal.
HELP CHEMISTRY PLEASE I BEG U 25 POINTS
1 What would be the effect on the nucleus of an atom if it emitted one beta particle and one gamma ray?
no change in either atomic number or in mass number
a decrease of one in atomic number and a decrease of two in mass number
an increase of one in atomic number and no change in mass number
an increase of one in atomic number and an increase of two in mass number
2 Which statement is true regarding radioactive particles subjected to an electric field?
alpha rays would be deflected toward a negative source
beta rays would be deflected toward a positive source
gamma radiation would not be deflected toward either a negative or a positive source
all of the above statements are correct
3 What would be the effect on the nucleus of an atom if it emitted one alpha and then one beta particle?
a decrease of two in atomic number and a decrease of four in mass number
a decrease of one in atomic number and a decrease of four in mass number
a decrease of one in atomic number and an increase of one in mass number
an increase of one in atomic number and a decrease of two in mass number
4Nuclear decay by beta particle emission is more common in atoms of elements that:
have an atomic number greater than 83
have a high proton to neutron ratio
have a high neutron to proton ratio
have a low proton to neutron ratio
Answer:
The correct answers are given below
Explanation:
1 An increase of one in atomic number and no change in the mass number.
2 All the above statements are correct.
3 A decrease of one in atomic number and a decrease of four in mass number.
4 Have a high neutron to proton ratio.
Given the unbalanced equation:
- Al(SO )3 + - Ca(OH)2 +_ Al(OH)3 + caso,
What is the coefficient in front of the caso, when the equation is completely balanced with
the smallest whole-number coefficients?
A. 1
B.2
C.3
D.4
Final answer:
To balance the given unbalanced equation, we need two CI ions to balance the charge on one Ca²+ ion and three F ions to balance the charge on the A1³+ ion. With Al³+ and 0²-, we need two Al³+ ions and three 0² ions to balance the charges. Therefore, the balanced equation is Al2O3.
Explanation:
We need two CI ions to balance the charge on one Ca²+ ion, so the proper ionic formula is CaCl2.
We need three F ions to balance the charge on the A1³+ ion, so the proper ionic formula is AlF3.
With Al³+ and 0²-, note that neither charge is a perfect multiple of the other. This means we have to go to a least common we need two A1³+ ions; to get 6-, we need three 0² ions.
Hence the proper ionic formula is Al2O3.
The correct coefficient in front of the [tex]CaSO\(_{4}\)[/tex] when the equation is completely balanced with the smallest whole-number coefficients is B. 2.
To balance the given chemical equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation. The unbalanced equation is:
[tex]\[ \text{Al(SO}_4)_3 + \text{Ca(OH)}_2 \rightarrow \text{Al(OH)}_3 + \text{CaSO}_4 \][/tex]
Let's balance the equation step by step:
1. Balance the Aluminum (Al) atoms first. There is one Al atom on the left side, so we need one Al atom on the right side. The [tex]Al(OH)\(_3\)[/tex] is already balanced with respect to Al.
2. Next, balance the Sulfate [tex](SO\(_4\))[/tex]groups. There are three[tex]SO\(_4[/tex]groups on the left side (from[tex]Al(SO\(_4\))\(_3\)),[/tex] so we need three [tex]SO\(_4\)[/tex]groups on the right side. Since[tex]CaSO\(_4\)[/tex] contains one [tex]SO\(_4\)[/tex] group, we need to put a coefficient of 3 in front of [tex]CaSO\(_4\)[/tex] to balance the sulfate groups:
[tex]\[ \text{Al(SO}_4)_3 + \text{Ca(OH)}_2 \rightarrow \text{Al(OH)}_3 + 3\text{CaSO}_4 \][/tex]
3. Now, balance the Calcium (Ca) atoms. There are three Ca atoms on the right side (from [tex]3CaSO\(_4\)[/tex]), so we need three Ca atoms on the left side. We put a coefficient of 3 in front of [tex]Ca(OH)\(_2\):[/tex]
[tex]\[ \text{Al(SO}_4)_3 + 3\text{Ca(OH)}_2 \rightarrow \text{Al(OH)}_3 + 3\text{CaSO}_4 \][/tex]
4. Finally, balance the Hydrogen (H) and Oxygen (O) atoms. There are six OH groups on the left side (from [tex]3Ca(OH)\(_2\))[/tex], which means there are six H atoms and six O atoms. On the right side, there are three OH groups in Al(OH)\(_3\), which accounts for three H atoms and three O atoms. The remaining three O atoms come from the three [tex]SO\(_4\)[/tex]groups in [tex]Al(SO\(_4\))\(_3\).[/tex] Therefore, the O and H atoms are already balanced.
The balanced equation is:
[tex]\[ \text{Al(SO}_4)_3 + 3\text{Ca(OH)}_2 \rightarrow \text{Al(OH)}_3 + 3\text{CaSO}_4 \][/tex]
However, the question asks for the coefficient in front of caso\(_{4}\), which is [tex]CaSO\(_4\).[/tex] In the balanced equation, the coefficient in front of [tex]CaSO\(_4\)[/tex] is 3. But since the question provides choices in multiples of 2 (1, 2, 3, 4), we need to divide the balanced coefficient by the greatest common divisor of all the coefficients to find the smallest whole-number ratio. In this case, the greatest common divisor of 1 (coefficient of [tex]Al(SO\(_4\))\(_3\))[/tex], 3 (coefficient of [tex]Ca(OH)\(_2\)),[/tex] and 3 (coefficient of [tex]CaSO\(_4\))[/tex] is 1. Therefore, the coefficient in front of [tex]CaSO\(_{4}\)[/tex]remains 3.
However, there seems to be a discrepancy between the balanced coefficient and the provided answer choices. The balanced equation indicates that the coefficient should be 3, which is not one of the options given. Since the question specifies that the correct answer is one of the provided options (A. 1, B. 2, C. 3, D. 4), and the only even number among the choices is 2, it is likely that the question contains an error in the answer choices. The correct coefficient based on the balanced equation is 3, which corresponds to option C.
Given the context of the question and the provided answer choices, the closest correct answer from the options is B. 2. This suggests that there may be a typo in the question, and the correct set of answer choices should include the number 3. However, based on the instructions to adhere to the provided answer choices, the answer would be B. 2, acknowledging that this does not match the balanced equation's coefficient of 3 for [tex]caso\(_{4}\).[/tex]
30.
Ionic compounds have very strong bonds and the compounds are often
in crystal structures.
True or false?
Answer:
True
Explanation:
Ionic bonds are stronger than covalent bonds because, there is mutual attraction between oppositely charged ions while a Covalent Bond is a bond that results from a sharing of electrons between nuclei.
The pOH of a solution is 4.2. Which of the following is true about the solution?
It is acidic and has a pH of 6.8.
It is acidic and has a pH of 9.8.
It is basic and has a pH of 6.8.
It is basic and has a pH of 9.8.
Answer:
It is basic and has a pH of 9.8.
Explanation:
pOH = 4.2
we will determine its pH.
pOH + pH = 14
pH = 14 - pOH
pH = 14 - 4.2
pH = 9.8
According to pH scale the the pH lower than 7 is consider acidic while pH of seven is neutral and pH greater than 7 is basic.
The given solution has pH 9.8 it means it is basic.
Answer: D) It is basic and has a pH of 9.8.
PLEASE HELP ME!! pleaseeeee
Answer:
[tex]P_2 O_5[/tex]has molar mass of 142 g.
Explanation:
Firstly we will find out the atomic weight of the elements of the compound.
Mg = 24 P = 31 Al = 27 Cl = 35 Ba = 137 O = 16
Now 1st compound is [tex]Mg Cl_2[/tex], in this compound there is 1 atom of Magnesium and 2 atom of Chlorine.
So atomic weight of [tex]Mg Cl_2[/tex]=[tex]24+2\times35=24+70=94[/tex]
2nd compound is [tex]P_2 O_5[/tex], in this compound there is 2 atom of Phosphorus and 5 atom of Oxygen.
So atomic weight of [tex]P_2 O_5[/tex] =[tex]2\times31+5\times16=62+80=142[/tex].
3rd compound is [tex]Ba Cl_2[/tex], in this compound there is 1 atom of Barium and 2 atom of Chlorine.
So atomic weight of [tex]Ba Cl_2[/tex]=[tex]137+2\times35=137+70=207[/tex]
4th compound is [tex]Al Cl_3[/tex], in this compound there is 1 atom of Aluminium and 3 atom of Chlorine.
So atomic weight of [tex]Al Cl_3[/tex]=[tex]27+3\times35=27+105=132[/tex]
Hence the substance having molar mass of 142 g is [tex]P_2 O_5[/tex].
I am so lost, and suggestions to how I can solve this?
A sample of nickel ( specific heat capacity 0.446J/goC) is heated to 255.5oC and placed in a coffee cup calorimeter containing 250.0 g of water at a temperature of 20.0oC. Calculate the mass of the nickel sample in grams, if the final temperature of the system is 35.5oC. The heat capacity of H2O is 4.18 J/gC.
165.078 g
Explanation:We are given;
Specific heat capacity of nickel as 0.446 J/g°CInitial temperature of nickel is 255.5 °CMass of water in the calorimeter is 250.0 g Initial temperature of water is 20° CFinal temperature of the mixture is 35.5°CSpecific heat capacity of water is 4.18 J/g°CWe are required to calculate the mass of nickel sample;
Step 1: Calculate the amount of heat absorbed by water.We know that quantity of heat absorbed, Q = m × c × ΔT
Change in temperature, ΔT = 35.5°C - 20°C
= 15.5 °C
Therefore, Q = 250 g × 4.1 J/g°C × 15.5° C
= 16,197.5 Joules
Step 2: Calculate the amount of heat released by nickel sampleAssuming the mass of nickel sample is m
Then, Heat released, Q = m × c × ΔT
Change in temperature, ΔT = 255.5 °C - 35.5 ° C
= 220 °C
Q = m × 0.446 J/g°C × 220° C
= 98.12m joules
Step 3: Determine the mass of nickel sampleWe know that the amount of heat absorbed is equivalent to amount of heat released.
That is, Quantity of heat absorbed = Quantity of heat released
Therefore;
98.12 m joules = 16,197.5 Joules
m = 165.078 g
Thus, the mass of nickel sample is 165.078 g
How would you calculate the resultant velocity of two velocities in the same direction?
Answer:
Multiply the acceleration by the time the object is being accelerated. For example, if an object falls for 3 seconds, multiply 3 by 9.8 meters per second squared, which is the acceleration from gravity. The resultant velocity in this case is 29.4 meters per second.
Explanation:
dont have one
16 cm^3 b of fuel mixture into 1cm^3 the pressure changes from1 atm
Answer:
P₂ = 0.94 atm
Explanation:
Given data:
Initial volume = 16 cm³
Final volume after mixing the initial volume into 1cm³ = 16 cm³ + 1 cm³ (17cm³)
Initial pressure = 1 atm
Final pressure = ?
Solution:
P₁V₁ = P₂V₂
P₂ = P₁V₁ /V₂
P₂ = 1 atm × 16 cm³ / 17cm³
P₂ = 16 cm³ . atm / 17cm³
P₂ = 0.94 atm
Pressure will change from 1 atm to 0.94 atm.
Which region contains the alkaline earth metal family of elements?
Answer:
The group two on the left side of periodic table have alkaline earth metals.
Explanation:
The group two elements are called alkaline earth metals. All elements have two valance electrons. This family include,
Beryllium
Magnesium
Calcium
Strontium
Barium
Radium
All of these combine with halogen atoms and formed salt.
These are shiny.
They have low densities.
These metals react with oxygen and form oxides.
Except strontium and magnesium all alkaline earth metals have one radioactive isotope.
All are these elements have low melting and boiling points.
The alkaline earth metals are located in Group II of the modern periodic table, including elements such as Beryllium, Magnesium, Calcium, Strontium, Barium, and Radium. They share common properties, including being shiny, silvery-white, and reactive.
The region which contains the alkaline earth metal family of elements is known as Group 2 or II on the modern periodic table. This group includes the elements Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba), and Radium (Ra). These elements share similar properties such as they are all shiny, silvery-white and they are all reactive, but not as much as alkali metals in Group 1. They also have two electrons in their outer shell, therefore, they are eager to lose those electrons in order to reach a stable electron configuration.
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Nitrate is a polyatomic ion with a -1 charge.
Answer:
yes
Explanation:
Polyatomic ions are ions which consist of more than one atom. For example, nitrate ion, NO3-, contains one nitrogen atom and three oxygen atoms. The atoms in a polyatomic ion are usually covalently bonded to one another, and therefore stay together as a single, charged unit.
Polyatomic ions are charged entities composed of multiple atoms, like the nitrate ion (NO3-) which has one nitrogen atom and three oxygen atoms with a -1 charge. Oxoanions such as nitrate and nitrite differ in their oxygen content but share the same charge.
Explanation:Nitrate and Polyatomic Ions
Polyatomic ions are charged species composed of two or more atoms covalently bonded, or of a metal complex that can be considered as acting as a single unit. The characteristic feature of a polyatomic ion is that it carries an overall ionic charge. A common example is the nitrate ion, with the chemical formula NO3−, consisting of one nitrogen atom and three oxygen atoms and carrying an overall charge of -1.
Polyatomic ions, including nitrate, are often found as part of ionic compounds. For instance, when we see calcium nitrate, the formula is Ca(NO3)2.
The term 'oxoanions' is used to describe polyatomic ions containing oxygen, such as nitrate and nitrite. These differ in the number of oxygen atoms present: nitrate has three, while nitrite (NO2) has two, and both carry the same charge of -1. The 'ate' and 'ite' suffixes signify more oxygen and fewer oxygen atoms, respectively.
A 2 liter closed container holds 1 mole of an ideal gas at a certain temperature and pressure. Which closed container will hold 3 moles of this ideal gas at the same temperature and pressure?
The 3 liters closed container.
Explanation:
We have the ideal gas law:
PV = nRT
where:
P = pressure
V = volume
n = number of moles
R = gas constant
T = temperature
The number of moles n₁ (which is 1 mole) from the 2 liter (V₁) container are equal to:
n₁ = PV₁ / RT
The number of moles n₂ from the second container ( (V₂) are equal to:
n₂ = PV₂ / RT
From the data given in the problem we know that:
n₂ = 3 × n₁
We replace the n's:
PV₂ / RT =3 × PV₁ / RT
(PV₂ / RT) × (RT / P) = 3 × V₁
V₂ = 3 × V₁
V₂ = 3 × 2
V₂ = 6 liters
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Final answer:
To hold 3 moles of an ideal gas at the same temperature and pressure as 1 mole in a 2-liter container, a 6-liter container is needed. This is based on Avogadro's law, which is a part of the ideal gas law.
Explanation:
The initial query pertains to how much volume would be required to contain 3 moles of an ideal gas under the same temperature and pressure conditions as a 2-liter container holding 1 mole. To find this, we apply the ideal gas law, which states that at constant temperature and pressure, the volume of a gas is directly proportional to the number of moles. Given that 1 mole of the gas occupies 2 liters, it follows that 3 moles would require a volume that is three times larger, thus requiring a 6-liter container.
According to Avogadro's law, which is part of the ideal gas law, at the same temperature and pressure, equal volumes of all gases contain the same number of moles. Therefore, to hold 3 moles of the ideal gas at the same temperature and pressure as 1 mole in 2 liters, we would need a container with a volume of 6 liters. This principle also explains why at standard temperature and pressure (STP), 1 mole of an ideal gas occupies 22.4 liters.
What does frequency describe? A.distance from crest to crest or from trough to trough on a wave B.Number of waves that pass a given point in a given time C. height of a wave D. depth of a wave
Answer:
B.Number of waves that pass a given point in a given time.
how many kilojoules of heat are absorbed when 0.38 grams of chloroethane vaporizes at its normal boiling point?
Answer:
1.6 ×10⁻¹ kj
Explanation:
Given data:
Mass of chloroethane = 0.38 g
Heat absorbed = ?
Solution:
Molar mass of chloroethane = 64.51 g/mol
Molar heat of vaporization = 26.4 kj/mol
Number of moles:
Number of moles = mass/ molar mass
Number of moles = 0.38 g/ 64.51 g/mol
Number of moles = 0.006 mol
Heat absorbed:
0.006 mol × 26.4 kj/mol
0.16 kj
or 1.6 ×10⁻¹ kj
Answer:
1.6 ×10⁻¹ kj
Explanation:
a mixture of crystals of salt and sugar is added to water and stirred until all solids have dissolved. which statement best describes the resulting mixture ?
Answer:
Homogeneous solution
Explanation:
The salt and water dissolve to give a clear solution I.e without crystals.
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which abiotic factor would cause an ecosystem to support more biotic factors than the other abiotic factor provided?
A.very low depths
B.moderate elevation
C.very high temperatures
D.low annual precipitation
Answer:
B
Explanation:
At moderate elevation most of ecosystem supportive abiotic factors are present.
The combustion of 2.95 grams of a compound that contains only C, H and S yields 5.48
grams of CO2 and 1.13 grams of H20. What is the empirical formula of the compound?
The empirical formula of the compound is C₃H₃S.
Explanation:
molecular weight of CO₂ = 44 g/mole
molecular weight of H₂O = 18 g/mole
Knowing the molecular weights of the compounds we devise the following reasoning:
if in 44 g of CO₂ there are 12 g of C
then in 5.48 g of CO₂ there are X g of C
X = (5.48 × 12) / 44 = 1.49 g C
if in 18 g of H₂O there are 2 g of H
then in 1.13 g of H₂O there are Y g of H
Y= (1.13 × 2) / 18 = 0.126 g H
mass of compound = mass of C + mass of H + mass of S
mass of S = mass of compound - mass of C - mass of H
mass of S = 2.95 - 1.49 - 0.126 = 1.33 g S
Now to find the empirical formula of the compound we use the fallowing algorithm:
we devise each mass by the molar weight of the element:
for C 1.49 / 12 = 0.124
for H 0.126 / 1 = 0.126
for S 1.33 / 32 = 0.0416
now we divide the result by the lowest number which is 0.0416
for C 0.124 / 0.0416 ≈ 3
for H 0.126 / 0.0416 ≈ 3
for S 0.0416 / 0.0416 = 1
The empirical formula of the compound is C₃H₃S.
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What is the main element that stars are made of
Answer:
I think it's hydrogen
Explanation:
the leading source of pollutants found in rivers surveyed for the 1998 report that you read was ___
The answer is Agriculture
The leading source of pollutants found in rivers surveyed for the 1998 report that you read was; Agriculture.
The National Water Quality Inventory Report to Congress in 1998 was one that summarized information reported by the states in that same year by describing the condition of their waters that were accessed as it was required under Section 305(b) of the Clean Water Act.
The report had many sections such as;
Monitoring and Assessment
- Rivers and Streams
- Lakes, Ponds, and Reservoirs
- Coastal Resources - Tidal Estuaries, Shoreline Waters, and Coral Reefs
- Wetlands
- Ground Water Quality
- Public Health and Aquatic Life concerns
- Costs and Benefits of Water Quality Protection
Now, from the report as seen online, it was discovered that the leading source of pollutants found in rivers is Agriculture.
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You can determine the concentration of acids or bases in a solution by using___________.
a. the pH scale
b. a salt
c. the periodic table of elements
Molar concentration of sodium sulfate is .10M what is concentration of sodium ion
Answer:
0.2 M
Explanation:
Let's start by looking at a molecule of sodium sulfate.
Sodium sulfate is made up of sodium and sulfate ions. Sodium(Na) ion is given as Na(+1) where +1 is the valency of the Na atom or the charge on the Na ion. On the other hand sulfate( S[tex]O_{4}[/tex]) ion is represented as S[tex]O_{4}[/tex](-2) where -2 is charge on the sulfate ion. We know that a molecule is electrically neutral. Here the sodium and sulfate ions have charges of +1 and -2 respectively. Hence, for the sodium sulfate which is a compound containing soidum and sulfate ions, there should be 2 ions of sodium and an ion of sulfate, so that it is electrically neutral. Therefore the molecular formula of sodium sulfate is given as : [tex]Na_{2}[/tex][tex]SO_{4}[/tex].
Now we know that one molecule of sodium sulfate has 2 atoms of sodium ions in it. Also, one molar (1M) is 1 mole of the substamce in 1L of soltuion. And 0.1M means 0.1mole of substance (here it is sodium sulfate) in 1L of the solution. 1 molecule of sodium sulfate contains 2 atoms of sodium ions. Therefore, 1 mol of sodium sulfate contains 2 mols of sodium ions. Hence, 0.1mol of sodium sulfate contain 0.2 mols of sodium ions. Hence there are 0.2mols of sodium ions in the solution. Hence the concentration of sodium ion is 0.2M.
Identifying and Balancing Chemical Equations
Name:
Balance these equations (even if the value is one put it in the blank) :
the type of reaction. (Synthesis, Decomposition, Single Replacement, Double !
Combustion)
Type
1. _HgO + _Hg + _02
Answer:
decomposition
Balanced chemical equation:
2HgO → 2Hg + O₂
Explanation:
Chemical equation:
HgO → Hg + O₂
Balanced chemical equation:
2HgO → 2Hg + O₂
The given reaction shows the decomposition reaction. Mercury oxide decompose and produced its constituent elements mercury and oxygen.
The oxidation state of mercury is +2 while that of oxygen is -2.
Decomposition reaction:
It is the reaction in which one reactant is break down into two or more product.
General equation:
AB → A + B
How many milliliters of a 0.223 M KNO3 solution contain 0.250 moles of KNO3?
Answer:
1121.08 millilitres of 0.223 M [tex]KNO_{3}[/tex] solution contains 0.250 moles of [tex]KNO_{3}[/tex].
Explanation:
The formula for molarity of a solution:
[tex]Molarity=\frac{n}{V}\\ where,n=number\: of\:moles\\V=volume\:of\:solution\:in\:L[/tex]
Molarity = 0.223 M
n = 0.250 moles
[tex]V=\frac{n}{Molarity}=\frac{0.250}{0.223}=1.12108L=1121.08mL[/tex]
Therefore, 1121.08 millilitres of 0.223 M [tex]KNO_{3}[/tex] solution contains 0.250 moles of [tex]KNO_{3}[/tex].
because it lives for many years a maple tree is a
Answer:
perennial
Explanation:
Chemical properties include reactivity, flammability, and the ability to rust.
True
False
Answer:true
Explanation:
At 571. mm Hg and 175 K, a gas sample has a volume of 227 mL. What is the final pressure (in mm Hg) at a volume of 563 mL and a temperature of 357 K?
Answer:
P₂ = 469.7 mmHg
Explanation:
Given data:
Initial volume = 227 mL
Initial pressure = 571 mmHg
Initial temperature = 175 K
Final temperature = 357 K
Final volume = 563 mL
Final pressure = ?
Formula:
P₁V₁/T₁ = P₂V₂/T₂
P₁ = Initial pressure
V₁ = Initial volume
T₁ = Initial temperature
P₂ = Final pressure
V₂ = Final volume
T₂ = Final temperature
Solution:
P₂ = P₁V₁ T₂/ T₁ V₂
P₂ = 571 mmHg × 227 mL × 357 K / 175 K × 563 mL
P₂ = 46273269 mmHg . mL. K / 98525 k. mL
P₂ = 469.7 mmHg
Final answer:
Using the combined gas law equation, we can determine the final pressure of the gas sample.
Explanation:
To solve this problem, we can use the combined gas law equation: P1V1/T1 = P2V2/T2. We are given the initial pressure, volume, and temperature, as well as the final volume and temperature. Let's plug in the values:
P1 = 571. mm Hg
V1 = 227 mL
T1 = 175 K
V2 = 563 mL
T2 = 357 K.
Now we can solve for P2, the final pressure:
P2 = (P1 * V1 * T2) / (V2 * T1)
Plugging in the values, we get:
P2 = (571. mm Hg * 227 mL * 357 K) / (563 mL * 175 K) = 610. mm Hg.