The balanced chemical equation in acidic solution is as follows: Cr₂O₇²−(aq) + 3 HNO₂(aq) ⎯→2 Cr₃+(aq) + 3 NO₃−(aq) + 4 H₂O(l).
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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How is density different than weight?
Answer:
Density is the substance's mass per unit of volume. The symbol most often used for density is ρ, although the Latin letter D can also be used. Mathematically, density is defined as mass divided by volume.
Weight is a body's relative mass or the quantity of matter contained by it, giving rise to a downward force; the heaviness of a person or thing.
An inlet stream consisting of 20% CH, and 80% water is fed into a continuous evaporator. The substances after the reaction will pass through the condenser, knowing the condenser's output consists of two streams, the steam stream containing C, H, CH3OH and water; dong long consists of the remains of C2H, CHOH and water. The vapor leaving the condenser cell will be recirculated and mixed with the original inlet stream before entering the reaction cell. Let the reaction take place as follows:
The vapor leaving the condenser cell will be recirculated and mixed with the original inlet stream before entering the reaction cell.
What is Thermal pollution?Thermal pollution is a term use to describe the final result caused from the water used as a coolant by power plants and/or industrial companies. It changes the water temperature and its quality. The substances after the reaction will pass through the condenser.
It is usually caused from humans or companies especially manufacturing companies - They use it for their personal needs. The end product of the water after being discarded is Thermal Pollution.
Therefore, The vapor leaving the condenser cell will be recirculated and mixed with the original inlet stream before entering the reaction cell.
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PLEASE HELP!!
Which physical adaptations increase an organism's chances of physically defending itself?
(Select all that apply.)
O the venom of a snake
the horns of cattle
O the wax-producing glands of bees
O the bright plumage of birds
The venom of a snake, the horns of cattle, the wax-producing glands of bees, and the bright plumage of birds all are physical adaptations that increase an organism's chances of physically defending itself.
What are physical adaptations?Physical adaptations do develop over many generations. The shape of a bird's beak, the thickness or thinness of the fur, and the shape of the nose or ears are examples of physical adaptations.
Adaptation can be described as a characteristic that provides defense for an animal to survive in its habitat. All animals should be able to get food and water, protect themselves from harm, and climate, and reproduce young species.
Horns and antlers can be used to protect themselves, fight for territory, or to attract a mate. The leaves are coated in the wax which reduces water loss and stops the plant from drying out. Some butterflies and birds have bright, vivid colors that provide them stand out from their surroundings and serve as a warning to predators.
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Oxygen and chlorine gas are mixed in a container with partial pressures of 3040 mmHg and
1.63 atm, respectively.
What is the TOTAL pressure inside the container in atm? *Don't forget to convert: 760mmHg
= 1atm*
Answer:5.63 atm
Explanation: Dalton's Law states that total pressure of a mixture of gasses is equal to the sum of partial pressure of each gas.
[tex]P_{tot} = P_{1} +P_{2}+ P_{3}...[/tex]
We are given pressure O2 and pressure Cl2.
Step 1: First, convert 3040mmHg to atm by dividing by 760.
[tex]\frac{3040mmHg}{760atm} = 4 atm[/tex]
Step 2: Plug your numbers into the equation
[tex]P_{tot} = P_{O2} +P_{Cl2}[/tex]
[tex]P_{tot} = 4atm + 1.63 atm = 5.63 atm[/tex]
What is the meaning of "implicit"?
A) Found in a text
B) Implied by the text
C) Stated directly
D) Stated from evidence
yoo anyone know this one>
Cell Membrane Transport
List 5 observations when you open the blue and green gated channels:
Section 2
After listing your observation, click “reset all” and do the same process again, following the instructions listed above. Answer the following questions below.
1.) Open the green gated channel and observe. What did you observe when you open the green gated channel?
2.) Based on your observations, what type of solution have you observed? Is it ‘hypertonic’, ‘hypotonic’ or ‘isotonic’? Explain
3.) Open the blue gated channel. Observe on what will happen when you open the blue gated channel. What have you observed?
4.) What type of solution have you observed? Is it ‘hypertonic’, ‘hypotonic’ or ‘isotonic’? Explain.
5.) Slow down the animation. What did you observed on the motion of the green circles and blue diamonds?
A type of fossil fuel,known as Tar stands.
what is fossil fuel?A fossil fuel is a hydrocarbon-containing material formed naturally in to the Earth's crust from to the remains of dead plants and animals and birds that is the extracted and burned as thr a fuel. The main fossil fuels are mainly coal, oil, and natural gas.
Tar sands are a combination of clay, sand, water and bitumen, which is a heavy hydrocarbon. Like the kerogen in oil shale, tar sands' bitumen can be upgraded to synthetic crude oil.
So answer is tar sands.
These include tar sands – deposits of moist sand and it is clay with 1-2 percent bitumen (thick and heavy are petroleum rich in the carbon and poor in the hydrogen). These are the removed by strip mining in the (see section below on coal)
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which of the following cofactors would be required to transfer a carboxyl group onto pyruvate to form oxaloacetate?
The cofactors would be required to transfer a carboxyl group onto pyruvate to form oxaloacetate is biotin.
What is pyruvate carboxylase?Pyruvаte cаrboxylаse (PC) is а mitochondriаl enzyme bound to biotin thаt cаtаlyzes the conversion of pyruvаte to oxаloаcetаte when аbundаnt аcetyl CoА is аvаilаble, replenishing Krebs cycle intermediаtes in the mitochondriаl mаtrix. PC pаrticipаtes in gluconeogenesis, lipogenesis, аnd neurotrаnsmitter synthesis.
Pyruvate carboxylase is found in the mitochondria and catalyzes the following reaction:
Pyruvate + CO2 + ATP → oxalacetate + ADP
Your question is incomplete, but most probably your full question was
Which of the following cofactors would be required to transfer a carboxyl group onto pyruvate to form oxaloacetate?
A. Thiamine pyrophosphate
B. Tetrahydrofolate
C. Ascorbic acid
D. Cobalamin
E. Biotin
Thus, the correct answer is E.
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10. What subatomic particle (proton, neutron, or electron) is responsible for determining the identity of an atom
Answer:
proton
Explanation:
Atoms are composed of a nucleus, containing protons and neutrons, surrounded by a cloud of electrons. The number of protons in the nucleus determines the identity of the atom
Which of the following statements is true for ideal gases but is not always true for real gases?
(Select all that apply.)
a) Average molecular kinetic energy increases with temperature.
b) Replacing one gas with another under the same conditions has no effect on pressure.
c) There are no attractive forces between molecules.
d) Pressure is caused by molecule-wall collisions.
Replacing one gas with another under the same conditions, has no effect on pressure is true for ideal gases but is not always true for real gases.
What are ideal gases?A theoretical gas known as an ideal gas is made up of several randomly drifting point particles with no interparticle interactions. Because it complies with the ideal gas law, a condensed state equation and can be examined using statistical mechanics, the ideal gas concept is helpful.
Is nitrogen an ideal gas?Therefore, at room temperature (273 K), nitrogen is an acceptable "ideal gas," although CO2 and H20 may both be condense into liquids at the same temperature by applying pressure.
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Which element, represented by X, reacts with chlorine to produce the compound XCl2?
Aluminum
Sodium
Calcium
Argon
Answer:
C.) Calcium
Explanation:
Because none of the answer choices are nonmetals, we can safely assume this compound is not covalent. This means that the atoms involved in this molecule were ions before they bonded.
Chlorine, located in the 17th column, typically ionizes to become the anion Cl⁻. This anion has a negative charge of -1. The subscript indicates that there are 2 chorine ions in the compound, increasing the overall negative charge to -2 (2 x -1 = -2).
Since ionic compounds are neutral, the correct answer choice is the atom that ionizes to form a cation that can make the overall charge of the compound 0. As such, the cation needs to have a positive charge of +2 (+2 + (-2) = 0).
Aluminum = Al³⁺
Sodium = Na⁺
Calcium = Ca²⁺
Argon = does not typically ionize
Therefore, calcium must be the unknown element (X), making the compound CaCl₂.
How many grams is equal to 1.11 moles of NaCl?
Answer:
64.38g
Explanation:
Mass no. of Na is 23 and mass no. of Cl atom is 35. Total is 58. 1 mole of NaCl is 58g. 1.11 moles of NaCl is 1.11x58=64.38g.
Use these two constants for the question that follows:
e = 1.6 × 10−19 C
k = 8.99 × 109 N m2/C2
Two positive charges are 10−16 m away from each other. Using Coulomb's law, what is the strength of the force of attraction between these two particles?
144 N
160 N
230 N
287 N
The force of repulsion between the positive charges has a magnitude of 230 N. Option B
What is the Coulomb's law?We know that the Coulomb's law deals with the way that two charges are able to interact. The interaction between the two charges could be such that the charges are attracted to each other or the charges are repelled from each other.
The forces of attraction and repulsion are the bases of the Coulomb's law. According to the Coulomb's law, the forces of attraction or repulsion between two charges would depend on the product of the magnitudes of the charges and inversely proportional to the distance that separates the charges.
Hence;
F = K[tex]q_{1}[/tex][tex]q_{2}[/tex]/r^2
F = Coulomb's force
[tex]q_{1}[/tex]and [tex]q_{2}[/tex] = magnitude of the charges
r = distance of separation
Then;
F = 8.99 × 10^9 * (1.6 × 10^−19)^2/(1 * 10^-16)^2
F = 2.3 * 10^3 N
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A pure substance does not conduct electricity in the solid state but it does dissolve in water and the resulting solution conducts electricity. The substance has a fairly high
melting point. The substance is most likely to be what type of compound?
An ionic compound
A crystalline compound
A covalent compound
A metallic compound
Help me please.
How do animals see their pray without light?
Answer:Many nocturnal animals have a mirror-like layer, called the tapetum, behind the retina, which helps them make the most of small amounts of light.
Explanation:
Calculate the value of the reaction quotient, Q, for the galvanic cell expressed using shorthand notation below.Use the balanced chemical equation that has the smallest, whole number stoichiometric coefficients.Zn(s) | Zn^2+(aq, 0.0100 M) || Ag+(aq, 1.25 M) | Ag(s)
The value of the reaction quotient, Q, for the galvanic cell for the galvanic cell expressed using shorthand notation is 64×10 ^−3
Zn(s)+2Ag (1.25M)Zn2+ (0.01M)+2Ag in a cell (s).
Q= [Zn ^2+ ]/[Ag ^⊕ ]
Q= 0.01 / (1.25)^2
Q= 64×10 ^−3
What is galvanic cell?An electrochemical cell called a galvanic cell or voltaic cell, respectively named after the scientists Luigi Galvani and Alessandro Volta, produces an electric current by spontaneous oxidation-reduction reactions.Voltaic or galvanic cells are electrochemical devices that use spontaneous oxidation-reduction events to generate electricity.A galvanic cell is an electrochemical cell that uses a chemical process to generate electricity. The electrolytic cell propagates a chemical process using an electric current. Chemical energy is transformed into electrical energy in this cell. Electrical energy is transformed into chemical energy.For more information on galvanic cell kindly visit to
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the vapor pressure of liquid pentane, , is 100. mm hg at 260. k. a 0.206 g sample of liquid is placed in a closed, evacuated 370. ml container at a temperature of 260. k.
50.5 * 104 grams of the liquid sample are still present in the container at a temperature of 260 K, per the provided data.
What does vapor pressure mean?The equilibrium pressure between molecules moving from a liquid into a gaseous phase & molecules moving from a gaseous phase into a liquid phase in a closed container is known as the vapour pressure of a liquid.
Briefing :Pentane's liquid vapor pressure equals 100 mmHg or 13.33 KPa.
T = 260 K, the temperature
Container volume = 370 mL = 0.00037 m3mol
moles of liquid pentane = n
universal gas constant = R = 8.314 J/(mol·K)
Thus From the ideal gas equation PV = nRT →
Thus plugging in the values in the above equation we have
n = = 2.16×10⁻³ moles = 2.28*10³ moles
Hence the number of moles in 0.206 g sample of liquid pentane C₅H₁₂ with molar mass = 72.15 g/mol = 0.206/72.15 = 2.86*10⁻³ moles
Hence the number of moles present in the sample placed in the closed evacuated container = 2.86*10⁻³ moles
However number of moles to completely evaporate at 100 mmHg and 260 K is 2.16×10⁻³ moles hence, 2.86×10⁻³ moles - 2.16×10⁻³ moles, or 0.7 ×10⁻⁴ moles will be left in the container
converting the value in moles to mass we have number of moles, n = mass/(molar mass)
Therefore the mass = number of moles × molar mass = 0.7×10⁻⁴ * 72.15 = 50.5 * 10⁻∧4 grams left in the container
The liquid pentane C5H12 vapor pressure, or 100 mm Hg, will be the pressure inside the container at equilibrium.
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how many moles of hydrogen gas are produced from the reaction of 4.75 moles of zinc and an excess amount of hydrochloric acid
In the given question, the moles of hydrogen that can be obtained from the reaction is 4.75 moles.
The reaction of zinc with hydrochloric acid can be written as:
Zn + 2HCl ⇒ ZnCl₂ + H₂
This reaction is a displacement reaction, in which zinc displaces hydrogen from hydrochloric acid. Hydrogen is released from HCl and hydrogen gas appears at the end of the reaction.
It can be seen that 1 mole of zinc combines with 2 moles of HCl to produce 1 mole of hydrogen gas. If 4.75 moles of zinc is combined with an excess amount of HCl, then it will produce 4.75 moles of H₂.
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This graph shows the melting and boiling points of the alkali metals. Think about Francium, do you think it would have a higher or lower melting/boiling
point than lithium? Why? Can you predict it from the data?
There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Therefore, due to larger atomic size, francium has lower melting and boiling point than lithium.
What is periodic table?Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.
Francium has lower melting and boiling point than lithium because of the larger atomic size, due to which lattice energy becomes low.
Therefore, due to larger atomic size, francium has lower melting and boiling point than lithium.
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How many moles is equal to 44.27 grams of CO2?
Answer: 1.005919176541433
Explanation:
44.27 grams of CO2 is 1.0059 moles
as per given in the question,
the mass of [tex]Co_{2}[/tex] is given as 44.27g
need to find how many moles are equal to 44.27g
The molar mass of 1 mole of
[tex]Co_{2}[/tex]= Molar mass of C +2 x Molar mass of O
[tex]Co_2[/tex] = 12 + 2 x 16
[tex]Co_2[/tex]= 12 + 32 = 44 g
=> 44 gm of [tex]Co_2[/tex] = 1 mole of [tex]Co_2[/tex]
so, now 44.27 g of [tex]Co_2[/tex] is equal to [tex]\frac{given\ weight}{weight\ of \ 1 mole\ of\ compound }[/tex]
i.e,
number of moles of [tex]Co_2[/tex] = [tex]\frac{44.27}{44}[/tex]
number of moles of [tex]Co_2[/tex] = 1.0059 moles
the number of moles of 44.27 grams of [tex]Co_2[/tex] is 1.0059 moles
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Select the correct answer.
The benefits of a Supervised Agriculture, Experience include all the following EXCEPT
О А.
OB.
O c.
O D.
a guaranteed salary.
getting hands-on experience in the field.
developing skills those in agriscience need.
the opportunity to explore a potential career.
A. guaranteed salary.
Supervised Agricultural Experience (SAE)
A supervised agricultural experience (SAE) is an organized opportunity for experiential and work-based learning outside of the classroom in a setting other than a school setting that takes place outside of regular school hours in order to enhance a student's industry.
A few examples are cultivating and selling livestock or crops, making and selling farm machinery, purchasing and reselling feed, seeds, and fertilizer, running a pet-care business, or programming and installing computer hardware in tractors.
Programs for supervised agricultural experience fall into one of four categories: exploratory, entrepreneurial, placement, or research/experimentation. The SAE for each student is determined by their interests and the opportunities that are accessible.
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What mass (in grams) of fructose (C6H12O6) is contained in 125ml of a 0.500M fructose solution?
Taking into account the definition of molarity and molar mass, the mass of fructose contained in 125ml of a 0.500M fructose solution is 11.43 grams.
Definition of molarityMolarity is a measure of the concentration, which indicates the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:
molarity= number of moles of solute÷ volume
Molarity is expressed in units moles/L.
Molar massThe molar mass of substance is defined as its mass per unit quantity of substance. In other words, molar mass is the amount of mass that a substance contains in one mole.
Mass of fructoseIn this case, you have:
Molarity: 0.500 MNumber pf moles of fructose= ?Volume= 125 mL= 0.125 mL (being 1000 mL= 1 L)Replacing in the definition of molarity:
0.500 M= number of moles of fructose÷ 0.125 L
Solving:
0.500 M× 0.125 L= number of moles of fructose
0.0635 moles= number of moles of fructose
Being the molar mass of fructose 180 g/mole, the mass of the compound can be calculated as:
mass= molar mass× number of moles of fructose
mass= 180 g/mole× 0.0635 moles
mass= 11.43 grams
Finally, the mass of fructose is 11.43 grams.
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Scientists used radioactive hydrogen to make water. They grew plants using radioactive water. What happened to the radioactive hydrogen during photosynthesis? (1 point)
(A) It was recycled into water.
(B) It was recycled into light.
(C)It was recycled into glucose.
(D)It was recycled into hydrogen gas.
Radioactive hydrogen during photosynthesis It was recycled into glucose .The correct "option is C"
What is photosynthesis ?Photosynthesis is the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.
Therefore during this process hydrogen is combined with carbon dioxide to make glucose.
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Mechanism and products
There are so many types of chemical reaction reaction like combination reaction, double displacement reaction, nucleophilic substitution reaction etc. Therefore, the reaction is nucleophilic substitution reaction. The product formed is 1-bromo-2-methyl-2-phenylethane.
What is nucleophilic substitution reaction?One nucleophile substitutes another in a family of organic reactions known as nucleophilic substitution reactions.
The characteristics of SN1 mechanism:
SN1 stands for nucleophilic substitution reaction.
Leaving group, a nucleophile, electrophile and a solvent are present
Because a link is being severed, the first step is the most laborious.
In the given reaction, firstly H⁺ will attack OH to make good leaving group, then generation of carbocation will take place. Thereafter Br⁻ will attack the carbocation forming C-Br bond. The product formed is 1-bromo-2-methyl-2-phenylethane.
Therefore, the reaction is nucleophilic substitution reaction. The product formed is 1-bromo-2-methyl-2-phenylethane.
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the reaction between solid copper and nitric acid to form copper ii ion nitrogen monoxide gas and water is represented by the folloiowng eqation
The reaction between solid copper and nitric acid to form copper ii ion nitrogen monoxide gas and water is represented below- - Cu(s) + 4 HNO3(aq) → Cu(NO3)2(s) + 2 NO2(g) + 2 H2O(l).
What is reaction?
One or more chemicals, sometimes referred to as reactants, are changed into one or more new substances, referred to as products, during a chemical reaction.
What is copper?
Throughout the body, copper is a mineral. It maintains the health of your nerve cells and immune system and aids in the production of red blood cells in your body. Additionally, it aids in the formation of collagen, which is essential for the formation of bones and connective tissue. By lowering free radicals that can harm DNA and cells, copper may also have antioxidant properties.
With dilute nitric acid:
3 Cu(s) + 8 HNO3(aq) → 3 Cu(NO3)2(s) + 2 NO(g) + 4 H2O(l)
With conc. nitric acid:
Cu(s) + 4 HNO3(aq) → Cu(NO3)2(s) + 2 NO2(g) + 2 H2O(l)
Therefore, reaction between solid copper and nitric acid to form copper ii ion nitrogen monoxide gas and water is represented below- Cu(s) + 4 HNO3(aq) → Cu(NO3)2(s) + 2 NO2(g) + 2 H2O(l).
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Water, H20 is a molecule made of oxygen and hydrogen. The bonds that hold water molecules together are due to shared electrons and known as ________bonds. In contrast, the bonds that hold NaCl molecule together are_______bonds, arising from charge difference between the atoms.
Answer:
Water, H20 is a molecule made of oxygen and hydrogen. The bonds that hold water molecules together are due to shared electrons and known as Covalent bonds. In contrast, the bonds that hold NaCl molecule together are Ionic bonds, arising from charge difference between the atoms
Please help I need this by tomorrow morning!!!!
Are the following chemical reactions balanced? explain why or why not.
Which of the following statements about the valence electrons is false?
a.Valence electrons are involved in bonding.
b. Valence electrons are found in the outermost energy level.
c. Number of valence electrons determines whether atom forms a covalent or ionic bond.
d. Valence electrons are found in the nucleus.
Answer:
d. Valence electrons are found in the nucleus.
Explanation:
Valence electrons are the electrons in the outermost shell, or energy level, of an atom.
The other 3 statements are correct.
1. The pH of soda is generally around 3, while the pH of drinking water is generally around 7. A student comparing the two beverages concludes that soda is generally 10,000 more acidic than water. In three to four sentences, explain if her conclusion is correct or incorrect and why.
2. If a balloon is kept at a constant temperature, what pressure change would need to occur for the volume to increase to three times the size? Explain your answer.
Answer:
Here you go
Explanation:
1. No, her conclusion is incorrect. pH is a logarithmic scale, which means that a difference of 1 pH unit corresponds to a 10-fold difference in acidity. Therefore, a difference of 3 pH units corresponds to a 1000-fold difference in acidity, not 10,000. So soda is generally 1000 times more acidic than water.
2.The pressure of the balloon would need to decrease in order for the volume to increase to three times the size. This is due to the fact that air inside the balloon is a gas, and its volume is inversely proportional to the pressure of the gas. Therefore, a decrease in pressure would result in an increase in volume.
A metallic ion is known as a..
identify the types of business activities or operation
The types of business activities or operation are:
operatinginvesting financing.What are types of business activities ?The main types of business activities can be seen as the operating, investing, as well as the financing.
Investing business activities can be described as one that is capitalized over more than one year and it involves how the purchase of long-term assets is made and it can be recorded as a use of cash in the section.
Operating activities can be described a the daily activities of a company which could encompass the process of producing and selling its product, generating revenues, a which can aswell involves the maintenance activities.
Financing activities can be described as the transactions between a business as well as the lenders and owners to acquire or return resources it can be seen as the activities to fund the company, repay lenders.
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