Answer:
One Faraday is the charge of one mole of electrons, which is approximately 96,500 coulombs. To calculate the number of Faradays needed to reduce 127 grams of copper to the cuprous form in chlorine, we need to know the balanced chemical equation for the reaction and the equivalent weight of copper.
Explanation:
For the Haber process, N₂ + 3H₂-2NH3, what theoretical volume of ammonia (NH3
hould be produced if we start with 5.0L of N₂ if STP?
29.9
10.0
22.4
44.8
Explanation:
The theoretical volume of ammonia that should be produced in the Haber process if we start with 5.0 L of nitrogen (N2) at standard temperature and pressure (STP) can be calculated as follows:
1 mole of N2 reacts with 3 moles of H2 to form 2 moles of NH3
Thus, the number of moles of N2 present can be calculated using the Ideal Gas Law:
PV = nRT
Where n is the number of moles of gas, R is the gas constant, T is the temperature in Kelvin, P is the pressure in atmospheres, and V is the volume in liters.
At STP (0°C and 1 atm), the volume of one mole of gas is 24.45 L.
Given 5.0 L of N2 at STP, the number of moles of N2 can be calculated as:
n = (PV)/RT = (1 atm)(5.0 L)/(0.0821 atmL/molK)(273 K) = 1.96 moles
The number of moles of NH3 produced can then be calculated as:
n = (2 moles of NH3)/(1 mole of N2) = 2 moles/1 mole = 2 moles
The volume of NH3 can be calculated as:
V = nRT/P = (2 moles)(0.0821 atmL/molK)(273 K)/(1 atm) = 44.8 L
So, the theoretical volume of ammonia (NH3) that should be produced if we start with 5.0 L of N2 at STP is 44.8 L.
A total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 191 g of solution. The reaction caused the temperature of the solution to rise from 21.00 to 24.70 ∘C . What is the enthalpy of this reaction? Assume that no heat is lost to the surroundings or to the coffee cup itself and that the specific heat of the solution is the same as that of pure water. Enter your answer in kilojoules per mole of compound to three significant figures.
The enthalpy of this reaction is 1.48 kJ/mol.
The formula to calculate heat energy is
Q = m × c × ΔT
ΔT = T₂ - T₁
m = mass (grams)ΔT = T₂ - T₁ = 24.70 - 21.00 = 3.70 °C
Q = m × c × ΔT
Q = 191 × 4.184 × 3.70
Q = 2,956.83 J
Q = (2,956.83 ÷ 1,000) kJ
Q = 2.96 kJ
The enthalpy ΔH = Q ÷ n
n = number of moles = 2.00 molQ = heat energy = 2.96 kJΔH = enthalpyΔH = Q ÷ n
ΔH = 2.96 ÷ 2.00
ΔH = 1.48 kJ/mol
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How do I draw the Lewis structure ?
Find out how many valence electrons there are in total. Step 2: Write down the molecule's skeleton structure. Step 3: Each bond in the skeleton structure is formed by using two valence electrons.
How should I depict the Lewis structure?First, the sum of the valencies of each atom determines the total number of valence electrons in the molecule.
The Lewis dot structure gains electrons (number of electrons added equals magnitude of negative charge) if the molecule is an anion.
A Lewis electron dot diagram, also known as an electron dot diagram, Lewis diagram, or Lewis structure, is a way to show the valence electrons in an atom by placing dots around the symbol for the element. The number of valence electrons in the atom is depicted by the diagram's number of dots. The atom symbol is surrounded by dots that represent the electrons in the outer shell. These symbols are referred to as Lewis symbols and electron dot symbols.
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A flask with a volume of 250.0
mL contains air with a density of 1.126
g/L. What is the mass of the air contained in the flask?
A flask with a volume of 250.0 mL contains air with a density of 1.126 g/L. The mass of the air contained in the flask is 0.28 gram.
What do you mean by density ?The density of a material is the measure of how tightly it is packed together. It is expressed as mass per unit volume. Density Symbol is D or
Formula Density = m/V, where is the density, m is the object's mass, and V is the object's volume.
Given:
Volume = 250.0 mL
Convert 250.0 mL in Liters :
250. 0 / 1000 = 0,25 L
Density = 1.126 g/L
Mass = g ?
Mass = Density × Volume
Mass = 0.25 × 1.126
Mass = 0.28 gram
Thus, the mass of the air contained in the flask is 0.28 gram.
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chemical name of this formula Na2SO4.
Na is for sodium and SO4 is sulfate...
Answer: The chemical compound name for Na₂SO₄ is Sodium Sulfate.
which of the following cannot be a chemical symbol of an element
Cf cannot be a chemical symbol of an element. Therefore, option B is correct.
What is an element ?The term an element is defined as a substance that cannot be broken down into a simpler format. They are separate by a unequaled atomic number. The elements are formed by their atomic number in the periodic table, which highlights elements with similar properties.
Cf cannot be a chemical symbol of an element. CO is the symbol of element cobalt. B is the symbol of element boron and Cu is the symbol of an element copper.
Thus, option B is correct.
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Your question is incomplete, most probably your answer was
Which of the following cannot be the chemical symbol for an element
a. co
b. cf
c. b
d. cu
There is a block on your desk that acts as a paperweight. Its measurements are 3 cm by 4 cm by 6 cm. The block has a mass of 184.32 g. What is the block made of? 
The block on your desk given that it measures 3 cm by 4 cm by 6 cm and has a mass of 184.32 grams is made of marble
How do I know what the block is made of?To know what the block is made of, we shall determine the density of the block. Details below:
Dimensions = 3 cm by 4 cm by 6 cmVolume of block = 3 cm × 4 cm × 6 cm = 72 cm³Mass of block = 184.32 gramsDensity of block =?Density = mass / volume
Density of block = 184.32 grams / 72 cm³
Density of block = 2.56 g/mL cm³
Thus, from the calculation made above and also considering the table of densities given, we can conclude that the block is made of marble.
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Missing part of question:
See attached photo
Use your knowledge about chemical reactions; explain why gold coins and silver coins found at the bottom of the sea withstand the elements of the sea differently? Hint: gold coins mostly retain their gold finish.
According to the electronic configuration , gold and silver are inert metals and hence withstand the elements of the sea differently.
What is electronic configuration?Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule.
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What are some hazards to be aware of in this lab?
flammable substances
sharps (equipment that can cut or puncture skin)
natural gas
electricity
fire
extreme cold
distilled (aka de-ionized or DI) water
acid
Some of the hazards that we should be aware of in the laboratory include the following: flammable substances, sharps (equipment that can cut or puncture skin) and fire. That is option A, B and E.
What are laboratory hazards?Laboratory hazards are those substances or equipments that are found in the laboratory which can cause harm to an individuals working in the laboratory.
Some of the hazards in the laboratory include chemical, biological, physical and radioactive hazards, as well as, musculoskeletal stresses.
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Some of the hazards to be aware of in this lab include;
flammable substancessharps (equipment that can cut or puncture skin)fireacidWhat are the hazards in a laboratory?A Laboratory hazard is anything that has the potential to cause damage or harm.
Chemical, biological, physical, radioactive, and other possible risks are all present for those working in a laboratory, in addition to musculoskeletal strains. Many employees are more likely to sustain injuries because they are not aware of the dangers that could exist at work.
Some laboratory hazards include:
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Explain the relationships between mass % of sugar and density
The mass percent of the sugar would increase as the density is increasing.
What is the relationships between mass % of sugar and density?There is a positive relationship between the mass percent of sugar and the density of a sugar solution. As the mass percent of sugar in a solution increases, the density of the solution also increases
. This occurs because sugar molecules have mass, and when more sugar is added to a solution, the total mass of the solution increases, resulting in a higher density. However, it is important to note that the relationship between the mass percent of sugar and density is not linear and is influenced by the temperature and pressure of the solution.
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5.6 mol N₂O.
Express your answer using two significant figures.
5.6 mol N₂O is equal to 5.6 mol. (Note: The chemical formula N₂O already specifies the number of moles, so including "mol" after the number is redundant.) The answer, rounded to two significant figures, is 5.6 mol.
What is 1 Mole?A mole is a unit of measurement in chemistry that represents an amount of a substance. One mole is defined as the amount of a substance that contains Avogadro's number of entities, where Avogadro's number is defined as 6.02214076 x 10²³ particles. This number is used to convert between mass, number of particles, and moles of a substance.
For example, one mole of a pure substance contains 6.022 x 10²³atoms, molecules, or ions, depending on the nature of the substance. The mole is a useful way to measure large amounts of chemical substances while avoiding the use of cumbersome numbers.
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pls answer the question OR ELSE... a fly will land and perish in your beloved coffee
What is a limiting reactant?
Question 1 options:
the reactant that is in excess
the product that you can make the most of
The reactant that determines how much product can be made
the amount of reactants that react with each other
Answer:
The reactant that determines how much product can be made
Explanation:
The limiting reactant in a chemical reaction is the one that is consumed first and restricts the amount of product that may be produced (or limiting reagent).
_Na₂SO4 (aq) + _____ BaCl₂ (aq) → ______ BaSO4(s) +
Which coefficients balance the equation?
OA. 1,1,1,2
OB. 1,2,1,2
OC. 2,1,1,2
OD. 2,1,2,1
NaCl (aq)
Answer:
A
Explanation:
Na2SO4 +BaCl2 ____BaSO4+2NaCl
If the rate of change of Cl₂ is -0.0520M/s, what is the rate of change of NO?
2NO(g) + Cl₂(g) → 2NOC1(g)
The reaction has a first order in Cl 2 and a second order in NO. The general order of reactions is 2+1 = 3.
How do you find the rate law?We must ascertain the values of the exponents n, m, and p as well as the rate constant, k, in order to derive a rate law. The values of the coefficients required to formulate the rate law are available to us if the reaction orders for a reaction are provided.
The reaction's rate law is rate, starting from the slow step
k'[NOCl2][NO] - (1).
Fast step is used to determine the concentration of NOCl 2, which is an intermediate.
[NOCl 2]=K[NO][Cl2] - (2)
Substitute (2) in (1)
rate=k'K[NO][Cl2][NO]
Hence, rate =k[NO]2[Cl]
The reaction has a first order in Cl 2 and a second order in NO. The general order of reactions is 2+1=3
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How many quarters do you need to do 10 loads of laundry?
This depends how much it costs per load of laundry.
For example:
If 1 load of laundry costs $2.50, this would mean that you need 10 quarters for one load. Multiply that by 10, and you get 100 quarters (the equivalent of $25).
Depending on how much the load costs, simply divide the price per load by .25 to get you total in quarters, then multiply it by 10 in this case.
identify each unit as belonging to si units or us customary units
The correct identification of the units is given below:
S.I Units: meter, kilogram and KelvinUS customary units: gallon. mile, pound, degrees FahrenheitWhat is the SI Unit?The SI units and the physical quantities they represent are the meter for length, the second for time, the kilogram for mass, the kelvin for temperature, the candela for light intensity, the ampere for current flow, and the mole for substance amount.
US customary units refer to the system of measures used in the US to measure objects. All other measures are conventional, including the gallon for volume, mile for length, pound for mass, and degree Fahrenheit for temperature.
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identify each unit as belonging to si units or us customary units. gallon. mile. meter. pound. kilogram. degrees farenheight. kelvin.
Sive the IUPAC name for each of the following structures: 1. 2. 3. 4. 5. 6. 7. 3. 9. 10. H&C. H3C. H₂C: H H3C H₂C HC ww H₂C. H3C Br CH3 CH3 CH3 H Br CH3 CH 3 'Br CH3 CH 3 CH 3 CH 3 CH 3 CH3 CH3 CH3
The IUPAC was founded in 1919 by academics and researchers who realized the need for chemical standardization. Therefore, in the below given ways molecules can be named.
What is IUPAC ?The International Union of Pure as well as Applied Chemistry is abbreviated as IUPAC. It belongs to an international scientific publication with no government affiliation. The IUPAC works to develop chemistry by, among other things, establishing international quality standards for nomenclature, symbols, as well as units.
The IUPAC was founded in 1919 by academics and researchers who realized the need for chemical standardization. The International Union of Pharmaceutical Societies (IACS), the IUPAC's forerunner, convened in Paris in 1911 to discuss topics that needed to also be addressed.
CH[tex]_3[/tex] methane
CH[tex]_3[/tex]CH[tex]_3[/tex] ethane
CH[tex]_3[/tex]CH[tex]_2[/tex]CH[tex]_3[/tex] propane
Therefore, in the above given ways molecules can be named.
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The molar mass of KCI is 74.55 g/mol.
What is the mass of 0.359 mol KCI?
[?]g KCI
Mass of 0.359 mol of KCI is calculated to be 26.79 g. Mass of a given chemical element or chemical compound (g) divided by the amount of substance (mol) is called molar mass.
What is meant by molar mass?Molar mass of a compound can be calculated by adding standard atomic masses of the constituent atoms.
The mass of 0.359 mol of KCI can be calculated by multiplying the number of moles by its molar mass:
mass = moles * molar mass
mass = 0.359 mol * 74.55 g/mol
mass = 26.79 g
So, the mass of 0.359 mol of KCI is 26.79 g.
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Answer: 26.79
Explanation:
8.4×10−2 g Sr Express your answer using two significant figures.
Taking into account the definition of significant figures, 8.4×10⁻² g expressed using two significant figures is 8.4×10⁻² g
Definition of significant figuresSignificant figures are the digits of a number that are considered nonzero and have a real meaning and, therefore, provide some information.
To establish the significant figures you must bear in mind that:
Any number other than zero is considered significant.Zeros located between two digits other than zero and those located after the decimal point are considered significant figures.The leading zeros of the first non-zero digit are useful for fixing the position of the decimal point and are not significant.Significant figures in this caseScientific notation is useful because it makes it easier to understand the value of measurements, especially when they have very large or very small values, and it helps to identify significant figures.
To express a measurement in scientific notation, the first significant figure is placed starting from the left in the units position, followed by the decimal point and the rest of the significant figures. The number obtained is then multiplied by the power of 10 needed to retrieve the original number.
Then, in this case, 8.4×10⁻² g expressed using two significant figures is 8.4×10⁻² g, since 8 and 4 are the two significant digits.
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For the reaction
C+ O2 → CO2,
what is the maximum amount of CO2 which
could be formed from 3.67 mol of C and
4.23 mol of O₂?
Answer in units of g.
179.43 g/mol is the maximum amount of CO₂ which could be formed from 3.67 mol of C and 4.23 mol of O₂.
What is chemical reaction?
When molecules in a reactant undergo a chemical reaction, their bonds are broken, and molecules in the product undergo a similar process, new bonds are created, creating a new substance.
We are surrounded by chemical reactions on a daily basis, whether it be in our bodies as they process food or in the sun as they produce the light we see. Prior to starting with chemical reactions, it's crucial to understand physical and chemical changes.
C + O₂ → CO₂
carbon = 12.01g/mol
12.01 × 3.67
= 44.07 g/mol
O₂ = 32/mol
= 32 × 4.23
= 135.36 g/mol
44.07 g/mol + 135.36 g/mol
= 179.43 g/mol
Thus, 179.43 g/mol is the maximum amount of CO₂ which could be formed from 3.67 mol of C and 4.23 mol of O₂.
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Please help Quick I don't get it. and quick I got a time limit till tomorrow.
Dichotomous keys for the above can be:
Organism has legs only.... Organism has both legs and wings?They possess an antenna....do not possess an antennaDo they possess, claws?....Absence of claws?Do they have toxins( presence of stingers).... absence of stingers?How to create a dichotomous key?A dichotomous key is a tool used to identify species of plants, animals, or other objects based on a series of choices between pairs of contrasting characters.
To create a dichotomous key, follow these steps:
Familiarize yourself with the objects or organisms you wish to identify. Study their features and differences in detail.Choose the most important distinguishing characters of the objects or organisms and write down each pair of contrasting characters.Create the first split by choosing the most important contrasting character and writing it down as the first choice in the key.For each choice in the key, write down the possible outcomes and the next pair of contrasting characters.Continue making choices and creating new pairs of contrasting characters until you have identified all the objects or organisms.Learn more on dichotomous key here: https://brainly.com/question/24807939
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The molar mass of H2O is
18.02 g/mol. What is the mass
of 6.80 moles H₂O?
?] g H₂O
The molar mass of H2O is 18.02 g/mol. Therefore, 122.4g is the mass of 6.80 moles H₂O. Water is a gaseous, liquid, as well as solid material.
What is water?Water is a gaseous, liquid, as well as solid material made of something like the chemical elements oxygen and hydrogen. It is one among the most abundant and necessary chemicals.
At room temp, it is a tasteless and odorless liquid with the critical capacity to dissolve several other compounds. Water's flexibility as either a solvent is critical to living creatures.
mass = moles × Molar mass
= 6.80 × 18
=122.4g
Therefore, 122.4g is the mass of 6.80 moles H₂O.
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A mass of 99.7632 g of cold water at an initial temperature of 22.6°C are added to the hot water that was added to the calorimeter in the previous question. Given that the equilibrium temperature of this water was also 64.4°C, how much heat (in J) was absorbed by this mass of water? (5 sf) (Hint: I'm asking you to calculate qcold for this endothermic process).
1876.5J is the amount of heat released. Heat is the energy that moves through one body to another when temperatures are different.
What is heat?Heat is the energy that moves through one body to another when temperatures are different. Heat passes from the hotter to the colder body when two bodies with differing temperatures are brought together.
By transitioning through one physical state (or phase) to another, such as from a phase from solid to liquid (melting), from such a solids to a vapour (sublimation), from either a liquid to a vapour (boiling), either from from solid form to another, a substance can absorb heat without increasing in temperature (usually called a crystalline transition).
q=m×c×ΔT
q=99.7632× 0.45×(64.4°C-22.6°C )
q=99.7632× 0.45×41.8=1876.5J
Therefore, 1876.5J is the amount of heat released.
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A 76.00 pound flask of mercury costs $142.00. The density of mercury is 13.534 g/cm3. Find the price of one cubic inch of mercury by calculating intermediate values. What is the price of one pound of mercury?
The cost of 1 pound flask of mercury is $1.86. One of the most commonly used units for determining the mass or substance of an item or a body is the pound.
What is pound?You really must understand what pounds signify when referring to weight. One of the most commonly used units for determining the mass or substance of an item or a body is the pound.
Scales are used in several ways to determine a body's weight or mass. To measure various items of various sizes, many sorts of scales are utilized. As the measure of an object's weight, pounds are used. In Britain, this style of measuring in pounds is typical.
cost of 76.00 pound flask of mercury =$142.00
cost of 1 pound flask of mercury=$142.00/ 76.00 =$1.86
Therefore, the cost of 1 pound flask of mercury is $1.86.
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Why does ear escape from a tire when a tire valve is opened
Air escape from a tire when tire valve is opened because the pressure from the weight of the car is forcing the already pressurized air out .
Why does air escape from tire when tire valve is opened?When air is filled in tires, it get into more compact area than the outer atmosphere, therefore particles in tire are close to each other and exert pressure continuously on tire walls to get out of it. Thus, material of the tire need to be pressure resistant as much possible.
After opening the tire valve, air starts leaving with huge sound as strain outside the tire is weaker than that inside the tire. Molecules strike with the same force on larger area and pressure starts diminishing.
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Note: The question given on the portal is incomplete. Here is the complete question.
Question: Air leaves a tire when the tire valve is opened because
A. the pressure outside the tire is lower than the pressure inside the tire.
B. the pressure outside the tire is greater than the pressure inside the tire.
C. the temperature is higher outside the tire than inside the tire.
D. there are more gas particles outside the tire than inside the tire.
what volume of water should be added to 150cm3 of 0.5M NaOH to produce 0.1M solution
Taking into account the definition of dilution, the volume of water added to 150cm³ of 0.5 M NaOH to produce 0.1 M solution is 600 cm³.
Definition of dilutionA dilution is a procedure whose purpose is to decrease the amount of solute per unit volume of dilution. This procedure is accomplished by adding a specified amount of diluent to a specified amount of solute.
The amount of solute does not change. As more solvent is added, the concentration of the solute decreases and the volume of the solution increases.
A dilution is mathematically expressed as:
Ci×Vi = Cf×Vf
where:
Ci: initial concentrationVi: initial volumeCf: final concentrationVf: final volumeVolume of water addedIn this case, you know:
Ci= 0.50 MVi= 150 cm³Cf= 0.10 MVf= ?Replacing in the definition of dilution:
0.50 M× 150 cm³= 0.10 M× Vf
Solving:
(0.50 M× 150 cm³)÷ 0.10 M= Vf
750 cm³= Vf
If the initial volume is 150 cm³, the amount of volume of water added is calculated as:
Volume of water= Vf - Vi
Volume of water= 750 cm³ - 150 cm³
Volume of water= 600 cm³
In summary, the volume of water added is 600 cm³.
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Gaseous iodine pentafluoride, IF₅, can be prepared by the reaction of solid iodine and gaseous fluorine: I₂(s) + 5F₂(g) → 2IF₅(g) A 10.00 L flask is charged with 15.0 grams of I₂ and 2.00 atm of F₂ at 25 °C. The flask is heated to 100 °C until one of the reagents is completely consumed. What will be the percentage of IF₅ (by mole) in the final product mixture? (Assume ideal gas behavior).
Answer:
The percentage of IF₅ (by mole) in the final product mixture will be 50%. This is determined by the stoichiometry of the reaction, the given molar mass of the reactants, and the ideal gas law.
Explanation:
Pls answer the question OR ELSE... You will step in a huge pile of gum, thereby ruining your shoes!
This is what you call a reactant that you have enough of. The one that DOES NOT run out.
Question 2 options:
Excess Reactant
Limiting Reactant
Answer:
Excess Reactant
Explanation:
Limiting Reactant is the reactant the runs out first.
More molecules in a fixed volume means
pressure.
less
more
More molecules in a fixed volume means more pressure.
What is a Molecule?According to the context, the term may or may not include ions that meet this requirement. A molecule is a collection of two or more atoms held together by attractive forces known as chemical bonds.
Hence, it can be seen that an increase in the number of gas molecules, while container volume stays constant, increases pressure.
A decrease in container volume increases gas pressure. An increase in the temperature of a gas in a rigid container increases the pressure
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What was Flint’s response to the Virginia Tech research findings?
State of emergency was proclaimed in Flint, the county seat of Genesee, by Michigan Governor Rick Snyder on January 5, 2016. Shortly after, President Barack Obama announced a federal state of emergency, approving further assistance from the Department of Homeland Security and the Federal Emergency Management Agency.
What is the Flint water crisis?A public health emergency known as the Flint water crisis began in 2014 when the drinking water in Flint, Michigan was found to be tainted with lead and possibly Legionella bacteria. Flint switched its water source from treated Detroit Water and Sewerage Department water (obtained from Lake Huron and the Detroit River) to the Flint River in April 2014 due to a budget issue.
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