The removal of this ion from water by the calcifiers will definitely decrease the pH of water.
What is the bicarbonate ion?The bicarbonate ion is the ion that is designated as HCO3-. We must notice that this ion is present in abundant amounts in the sea. This amount definitely make the sea slightly alkaline.
Now we must note that the removal of this ion from water by the calcifiers that require it to make their shell will definitely decrease the pH of water.
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Which activity gives access to natural resources but might lead to problems such as sinkholes?
A. commercial agriculture
B. fracking
C. traditional hunting
D. open-pit mining
Human activities such as fracking might lead to problems such as sinkholes
What are sinkholes?Sinkholes are openings that form on the surface ofb the earth when water washes away the surface rock or soil layer exposing caverns that have formed within the earth.
Fracking involves using superheated water underground in order to drill natural gas and petroleum from underground.
Human activities such as fracking has been proven to increase the incidence of sinkholes.
Therefore, it can be concluded that fracking might lead to problems such as sinkholes.
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Answer:
1. D. fracking
2. A. algae
3. B. Pollution from the mines makes its way into water sources for Native American tribes and other people in the state.
4. C. during the Industrial Revolution
5. C. pollution of waters from open-pit mining
Unit 8 Lesson 8: Impact of Chemical Processes Quick Check
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What is the difference between a strong alkali and a weak alkali?
Answer:
Strong Alkali – Is an alkali which dissociates – almost completely in aqueous solution thereby producing a – high concentration of hydroxyl [OH– ] ions.
Weak alkali – Is an alkali which dissociates – only partially in aqueous solution thereby producing a – low concentration of hydroxyl [OH–] ions.
Sn=0.14 (E)
Sn+2 = -0.15(E)
Which form of tin is the stronger reducing agent? OS O Sn +2?
0.14
Explanation:
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Interpret the following balanced chemical equations in terms of particles, moles, and mass.
Show that the law of conservation of mass is observed.
a. N2(g) + 3H2(g) - 2NH3(g)
b. HCI(aq) + KOH(aq) - KCI(aq) + H-O0
C. 2Mg(s) + 02(g) - 2MgO(s)
The equations obey the law of conservation of mass in that the number of moles of each component atom is balanced on both sides.
Law of conservation of massIt states that mass is conserved during chemical reactions.
For the first equation: [tex]N_2(g) + 3H_2(g) --- > 2NH_3(g)[/tex], there are 2 nitrogen and 6 hydrogen atoms on the reactant and product's side respectively. Thus, the number of atoms is conserved.
For the second equation: [tex]HCI(aq) + KOH(aq) -- > KCI(aq) + H_2O (l)[/tex], there are an equal number of H, Cl, K, and O atoms at the reactant and product's sides. The number of atoms is also conserved.
Lastly in the equation: [tex]2Mg(s) + O_2(g) - 2MgO(s)[/tex], the number of each atom is also balanced on both sides.
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If a spoon of copper metal is placed in a solution of ferrous sulfate:
A. Iron will precipitate out
B. Copper will precipitate out
C. Copper and iron will precipitate
D. No reaction will take place
If a spoon of copper metal is placed in a solution of ferrous sulfate then no reaction will take place.
What is electrochemical series?Electrochemical series of metals is the series which gives idea about the reactivity of the metals if present in any solution of another metal.
Iron metal is placed at the top position with respect to the copper metal, means iron is more reactive than copper. So when a spoon of copper metal is placed in a solution of ferrous sulfate, copper will not able to displace the iron metals from its solution.
Hence no reaction will occur.
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List earth and the gas giant planets from the hottest to the coldest planet
Answer:
1. Venus
471°C
2. Mercury
(430°C) during the day, (-180°C) at night
3. Earth
16°C
4. Mars
-28°C
5. Jupiter
-108°C
6. Saturn
-138°C
7. Uranus
-195°C
8. Neptune
-201°C
Explanation:
.
Electrons flow from the anode to the cathode in a/an _______________. Choose all that apply. Group of answer choices voltaic cell electrolytic cell galvanic cell
Answer:
galvanic cell or electrochemical cell
Explanation:
the electrolytic cell needs electric supply to make charges flow from anode to cathode while the galvanic cell doesn't.
The electrolytic cell needs electric supply to make charges flow from anode to cathode while the galvanic cell doesn't.
What is Electrolytic cell?A device that can produce electrical energy from the chemical reactions taking place inside it is called an electrochemical cell. Electrochemical cells include a common 1.5V cell seen in TV remotes and clocks as well as lithium-ion batteries found in smart phones.
Galvanic cells, often referred to as Voltaic cells, and electrolytic cells are the two forms of electrochemical cells.
"In galvanic cells, spontaneous redox reactions take place, converting chemical energy into electrical energy. As opposed to electrolytic cells, which use an external power source to drive internal chemical reactions, which transform electrical energy into chemical energy.
Therefore, The electrolytic cell needs electric supply to make charges flow from anode to cathode while the galvanic cell doesn't.
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What are some instantaneous speed examples in an everday life!
Answer:
If you ask for water and water immediately appears that very second, this is an example of something instantaneous.
why are some voltaic cells called dry cells even though their chemistry involves water
Some voltaic cells are called dry because they do not have liquids in them.
Dry voltaic cellsThey are called dry because their electrolytes are usually in paste forms instead of aqueous form in which the electrolytes of wet cells are usually are.
The pastes in dry cells are made moist enough for the electric current to be able to flow through them.
Dry cells are advantageous because they are less heavy and one does not have to worry about the electrolyte spilling, unlike wet cells.
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What happens to the following system at equilibrium when it experiences an increase or a decrease in temperature?
H₂O(l) + heat energy ⇌ H₂O(g)
Most compounds that contain carbon can be placed in which chemical group?.
Answer:
Organic compounds
Explanations:
Organic compounds usually have carbon bonded with one or more of the following: hydrogen, nitrogen, or oxygen
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What is the mass of one atom of nickel?
Answer:
58.6934
Explanation:
periodic table
Answer:
58.6934 u
Explanation:
You can find this from the atomic mass number on a Periodic Table, Nickel is 58.6934, therefore the mass of one atom of nickel is 58.6934 u.
Before the 1800s the europeans especially wanted to trade for in africa
Europeans wanted to trade things for rubber and oil with Africa
How many chlorine atoms are on the products side of the reaction 2al 6hcl → 2alcl3 3h2? 2 3 6 9
The number of chlorine atoms present on the product side of the reaction is 6
What is a chemical equation?Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.
The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.
How to determine the number of atoms of Cl2Al + 6HCl → 2AlCl₃ + 3H₂
Products => AlCl₃ and H₂
Number of Cl atoms = 2 × 3
Number of Cl atoms = 6 atoms
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Answer: 3. 6
Explanation: To put it simply
PLEASE HELP: You have been given 2.42 moles of beryllium sulfide (BeS), determine the mass in grams of beryllium sulfide that you have.
The mass in grams of the given beryllium sulfide is 99.2 g. The correct option is the second option - 99.2 g BeS
Calculating mass of a compoundFrom the question, we are to determine the mass of the given beryllium sulfide.
From the given information,
Number of moles of beryllium sulfide (BeS) given = 2.42 moles
Using the formula,
Mass = Number of moles × Molar mass
Molar mass of BeS = 41 g/mol
Then,
Mass of BeS = 2.42 × 41
Mass of BeS = 99.22
Mass of BeS ≅ 99.2 g
Hence, the mass in grams of the given beryllium sulfide is 99.2 g. The correct option is the second option - 99.2 g BeS
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help please acids and basis
Let's see
[OH-] be x[tex]\\ \rm\Rrightarrow pOH=-log[OH-][/tex]
[tex]\\ \rm\Rrightarrow pOH=-logx[/tex]
[tex]\\ \rm\Rrightarrow 4.86=-logx[/tex]
[tex]\\ \rm\Rrightarrow logx=-4.86[/tex]
[tex]\\ \rm\Rrightarrow x=10^{-4.86}[/tex]
[tex]\\ \rm\Rrightarrow x=1.38M[/tex]
Determine if the following are examples of Elements, Compounds, or Mixtures
Air
Answer:
Mixture
Explanation:
Air is a mixture, meaning it can be separated into its components without a chemical reaction taking place. In this case, it is a mixture of gases.
Where t is time, N is the mass of the sample, and is the half-life (time it takes for half of the initial sample to decay). The half-life of Carbon-14 is about 5730 years. How many years would it take a 1000 gram sample to decay to only 400 grams
Answer:
see below
Explanation:
400 gm = 1000 gm (1/2)^n
.4 = (1/2)^n
n = 1.322 half lives = 7574.6 yrs
According to half life, 7574.6 years would it take a 1000 gram sample to decay to only 400 grams.
What is half life?Half -life of a substance is defined as the time which is required for half of the quantity of a radioactive substance to get decayed.It is a term which is used in nuclear chemistry for describing how quickly unstable atoms undergo radioactive decay into other nuclear species by emitting particles or the time which is required for number of disintegrations per second of radioactive material to decrease by one half of its initial value.
400 gm = 1000 gm (1/2)[tex]^n[/tex]
.4 = (1/2)[tex]^n[/tex]
n = 1.322 half lives = 7574.6 yrs.
Thus, 7574.6 years would it take a 1000 gram sample to decay to only 400 grams.
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Giving brainliest, please HELP!
Answer:
D = melting and vaporization
Explanation:
Pretend this is very cold ICE
A heat the ice up to melting point
B melt the ice to waterheat the water to boiling
D change water to steam
E heat the steam up (superheat the steam)
How does the bronsted-lowry theory define acids and bases.
Answer:
an acid is a proton (H⁺) donor, and a base is a proton acceptor.
Explanation:
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A radioactive isotope has an activity of 9.60 mCi. After 3.75 hours the activity is 7.39 mCi. What is the half-life of the isotope
For a radioactive isotope has an activity of 9.60 mCi. , the half-life of the isotope is mathematically given as
t0.5 = 23893 s
What is the half-life of the isotope?Generally, the equation for the half-life is mathematically given as
t0.5=T*0.693
Where
A = A0 e^(-t/T)
t/T = lnA0/A
3.75 hours/T=ln 9.60/7.39
T = 34478.5 s
Therefore
t1/2 = TX0.693
t0.5 = 23893 s
In conclusion, the half life
t0.5 = 23893 s
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If a reaction occurs, what will be the products of the unbalanced reaction
below
Cu(s) + Ni(NO3)2(aq) ➡️
A. CuNi(NO3)4(s)
B. No reaction will occur.
C. CuNi(s) + NO2(g)
D. Ni(s) + Cu(NO3)2(aq)
Answer:
B
Explanation:
Copper is lower on the activity series, so it can't replace nickel in this reaction. Therefore, no reaction will occur.
What is a physical property?
O a characteristic of a substance that cannot be measured but can be observed
O a characteristic of a substance that can be measured or observed without changing the chemical identity of the substance
O a characteristic of a substance that cannot be measured or observed by conventional means
O a characteristic of a substance that can be measured or observed only by changing the chemical identity of the substance
Answer:
B. a characteristic of a substance that can be measured or observed without changing the chemical identity of the substance
Explanation:
The definition of a physical property is " a property (as color, hardness, boiling point) of matter not involving in its manifestation a chemical change."
The only choice that matches this description fully is the second one, or B, so that is the answer.
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Lithium arsenate (Li3AsO4) and iron nitrate (Fe(NO3)3) are dissolved in water. What precipitate would be expected to form.
Then double displacement will happen
The reaction given by
[tex]\\ \rm\Rrightarrow Li_3AsO_4+Fe(NO_3)_3\longrightarrow LiNO_3+FeAsO_4[/tex]
Remember that nitrate ions and compounds are highly soluble in water like HNO_3 ,KNO_3.
So LiNO_3 remains dissolved in water or aqueous.
FeAsO_4 will be in solute form i.e precipitate
how many atoms are in 6.5 moles of zinc
Answer:
many atoms are in 6.5 moles of zinc? 6.5 moles. 6.02 x 10. 23 atoms =.
3 pages
Explanation:
The number of atoms in the 6.5 moles of zinc is equal to 39.15 × 10²³ atoms of zinc.
What is a mole?A mole is a scientific unit that is used to measure a large number of quantities of molecules, ions, atoms, or other particular particles. The number of particles or atoms in a mole is the same for almost all substances.
The number of entities present in one mole was experimentally found to be equal to 6.023 × 10 ²³, which is a constant. This number is termed as Avogadro’s number or Avogadro’s constant.
Given, the number of moles of zinc = 6.5 moles
The number of atoms of zinc in one mole = 6.023 × 10 ²³
Then 6.5 moles of zinc will have atoms of zinc = 6.023 × 10 ²³ × 6.5
= 39.15 × 10 ²³ atoms.
Therefore, the 39.15 × 10 ²³ Zinc atoms are in 6.5 moles of zinc.
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What is the molarity of an NaOH solution if 20. Milliliters of 2. 0 M HCl is required to exactly neutralize 10. Milliliters of the NaOH solution?
1.
1. 0 M
2.
2. 0 M
3.
0. 50 M
4
4. 0 M
Answer: 4
Explanation:
Balance the equation hbr + khco3 > h2o + kbr + co2
Answer:
It is already balanced
Explanation:
hbr + khco3 ===> h20 + kbr + co2 IS BALANCED
What is the name of NoCk4? Explain how you determined the bond type and the steps you used to determine the naming convention for the compound.
Some contaminants enter the water from commercial farming, while other problems are an indirect result of these contaminants. Which
water problem is an indirect result of contaminants from commercial farming?
A. fertilizers
B. herbicides
C. algae
D. pesticides
The indirect result of contaminants from commercial farming is algae.
What is Contaminant?Contaminant is a substance either chemical, physical that is very toxic or harmful to living organisms, when it is released into air, water, soil or food.
Contaminant are poisionus substance that are not deliberately or are deliberately introduced to space . This contaminants make things impure and they are highly poisionus.
Therefore, The indirect result of contaminants from commercial farming is algae.
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How much oxygen does an average 50 year-old tree produce?.
Answer:
A mature leafy tree produces as much oxygen in a season as 10 people inhale in a year." "A 100-foot tree, 18 inches diameter at its base, produces 6,000 pounds of oxygen." "On average, one tree produces nearly 260 pounds of oxygen each year. Two mature trees can provide enough oxygen for a family of four.
Explanation:
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