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Question 8 of 10
What is area?
A. The substance of an object
B. A unit of measurement
C. The size of an angle
D. How much space a flat shape covers
SUBMIT
Answers
Answer:
D
Explanation:
The area of a shape is the amount of space a 2-dimensional shape covers. It's measured in units squared (units²). So, the answer is D.
Related Questions
How is the human body like a stone arch?
Answers
Answer:
It is like an arch because it bends horizontal just like we do and the legs of the arch support the stone like our feet and legs support the weight of us.
Explanation:
Markovnikov addition of HCl to propene involves:
A. initial attack by a chlorine ion. B. initial attack by a chlorine atom. C. isomerization of 1-chloropropane. D. formation of a propyl cation. E. formation of an isopropyl cation.
Answers
Answer:
Answer choice (A)
Explanation:
Markovnikov addition of HCl to propene involves the initial attack by a chlorine ion (A) on the carbon-carbon double bond of propene. The chlorine ion carries a negative charge and is attracted to the positively charged carbon atom of the double bond. The attack results in the formation of a carbocation intermediate, which is stabilized by the chloride ion. The chloride ion then adds to the carbocation, resulting in the formation of 2-chloropropane. The addition follows Markovnikov's rule, which states that the hydrogen atom of HCl adds to the carbon atom of the double bond that already has more hydrogen atoms attached to it.
using a dot and cross diagram as electrons show the bonding in a molecule of oxygen(O2-2 atoms of oxygen, one as dots, one as crosses)
Answers
Answer:
attached is the answer, hope it helps!!
Where on the table would a group's
ionization energy be the greatest?
Answers
Answer:
upper left
Explanation:
it is a trend on the periodic table. Ionization energy increases from left to right(->) I t also increases down to up
Answer:
right
Explanation:
If you are doing this on usatestprep its on the right side
Find the volume of a locker that is 30cm long, 40cm wide, and 200 cm high.
Answers
Answer:
V= L × W × H so the answer is 240,000
In an experiment, a student places a small piece of pure Mg(s) into a beaker containing 250. mL of 6.44 M HCL(aq). A reaction occurs, as represented by the equation above
Answers
Answer:
The net ionic equation of the given reaction is:
Mg (s) + 2 H⁺ (aq) → Mg²⁺ (s) + H2 (g)
Explanation:
When magnesium metal (Mg) is treated with hydrochloric acid (HCl), then it displaces the hydrogen gas from the acid
.- Magnesium gets attached with the chlorine and hydrogen gas is evolved as a product in the reaction.
- We have not mentioned chlorine in the reaction as it is not undergoing any change during the reaction.
give me the five examples of kinetic
energy
Answers
Answer:
The answer to your question is
*( Flying AirplaneWalking & RunningCyclingRollercoastersHydro-Power Plants )*口
5. Which statement correctly describes HSO4- in the reaction represented by this equation?
HSO4- (aq) + H₂O(n) = H₂SO4(ng) + OH(aq)
* HSO4- is acting as a Brønsted-Lowry base because it is accepting a proton.
* HSO4- is acting as a Brønsted-Lowry acid because it is accepting a proton.
* HSO4- is acting as a Brønsted-Lowry acid because it is donating a proton.
* HSO4- is acting as a Brønsted-Lowry base because it is donating a proton.
Answers
Answer:
HSO₄⁻ is acting as a Brønsted-Lowry base because it is accepting a proton.
What is the Brønsted-Lowry Theory?
The Bronsted-Lowry theory states that acids act as proton donors, and bases act as proton acceptors; protons meaning hydrogen ions, since they only have 1 proton. This theory can be applied to practically any solvent.
HSO₄⁻(aq) + H₂O(l) ⇒ H₂SO₄(aq) + OH⁻(aq)
In the above equation:
the HSO₄⁻ accepts a proton from H₂O to form H₂SO₄the H₂O donates a proton to the HSO₄⁻ to form OH⁻Thus, the HSO₄⁻ is an base, and the H₂O is a acid.
Therefore, HSO₄⁻ is acting as a Brønsted-Lowry base because it is accepting a proton.
What has a Gibbs free energy of 0?
Answers
Pure elements has Gibbs free energy equal to 0.
The Gibbs free energy is a concept in chemistry specially of thermodynamics. The maximum amount of work that can be accomplished at a constant temperature and pressure by a closed system can be calculated using the Gibbs free energy (also known as Gibbs energy; symbol: denoted as delta G). Additionally, it offers a prerequisite for any processes like chemical reactions that might take place in such circumstances.
When a system achieves equilibrium without being pushed by an input electrolytic voltage, the Gibbs energy is the thermodynamic potential that is reduced. At the equilibrium point, its derivative w.r.t. the system's reaction coordinate vanishes.
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aromatic protons produce signal(s) in the range of 7-8 ppm, as a result of an effect called .
Answers
Due to a phenomenon known as diamagnetic anisotropy, aromatic protons emit signal(s) in the range of 7-8 ppm.
In aromatic compounds with resonance in the 7–8 ppm range, this impact is more prominent. A ring current is the term for the movement of the p electrons in benzene, and it induces an extra magnetic field that helps the protons. While the signals attributable to its aromatic carbons were seen in the range from 128 to 133 ppm, those for the aromatic phthalate ring protons were seen in the range from 7.63 to 7.82 ppm. ... the cis/trans-cyclohexylene CH carbon signals were detected in the range of 70.8 to 72.3 ppm.
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How many resonance structures can be drawn for co2−3?
Resonance:
Resonance is also called mesomerism. A compound shows resonance when it can be represented in more than one structure. The actual structure is a combination of all the structures.
Answers
The carbonate ion (CO₂³⁻) can be represented by three resonance structures.
Carbonate is a carbon oxoanion. It is a conjugate base of a hydrogencarbonate. ChEBI. Carbonate Ion is a polyatomic ion with formula of CO₃(²⁻).
Here are the three resonance structures for CO₂³⁻:
Structure with double bonds between carbon and two oxygen atoms:
O-C-O
Structure with double bonds between carbon and one oxygen atom, and a single bond with another oxygen atom:
O-C-O
Structure with double bonds between carbon and two oxygen atoms:
O-C-O
In reality, the actual structure of the carbonate ion is a combination or hybrid of these resonance structures, with the negative charge being delocalized over the three oxygen atoms. The image is given below.
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Chlorine has 7 valence electrons. With what group of elements will chlorine most readily bond?.
Answers
The elements that chlorine will most readily bond with are elements found in group one eg sodium, potassium, etc.
What is group of elements?Elements are arranged in groups in the periodic table based on their number of valance electrons.
Elements in the same group of the periodic table has similar characteristics.
Reaction between metals and nonmetalsWhen metals react with non-metals, electrons are transferred from the metal atoms to the non-metal atoms, forming ions.
The resulting compound is called an ionic compound.
Chlorine is the most reactive non metal and will bond easily with metals. The most reactive metals are found in group one.
Example of chlorine reaction with a group one elementCl⁻ + Na⁺ -------> NaCl
Thus, the elements that chlorine will most readily bond with are elements found in group one eg sodium, potassium, etc.
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Have no idea what the awnser is for this one right here
Answers
Answer:
A because its A
Answer:
A is 5.67 x 10x10x10 B is 0.567 x 10x10x10x10
Which of these has an oxidation number of zero (0)? Cal2, Ca CaS, Ca3N2
Answers
Ca is the correct answer. Maybe
what is periodic table
Answers
Answer:
the periodic table is the table of contents of the elements
how many grams are in 3.45 moles of CO2?
Answers
Answer:
The weight of 3.45 moles of carbon dioxide has been 151.8 grams.
Moles can be calculated as the mass of solute present with respect to the molecular mass of the solute.
Moles can be expressed as:
Moles = \rm \dfrac{weight}{molecular\;weight}
molecularweight
weight
The molecular weight of carbon dioxide has been 44 grams/mol.
The given moles of carbon dioxide = 3.45 moles.
3.45 mol = \rm \dfrac{weight}{44\;g/mol}
44g/mol
weight
Weight of carbon dioxide = 3.45 \times× 44 grams
Weight of carbon dioxide = 151.8 grams.
The weight of 3.45 moles of carbon dioxide has been 151.8 grams.
The molar mass of CO2 is 12.01+32=44.01g CO2
Multiply 3.45 mol*44.01 and you will get 151.8g CO2
What is the Molarity of a solution made by taking 2.5 moles and dissolving it into enough water to make 5.0 Liters of solution?
Answers
Answer:
.5 M
Explanation:
molarity = moles / liters
2.5/5 = .5 M
the williamson ether synthesis is one of several ways to synthesize ethers. what type of mechanism is involved in this synthesis?
Answers
The most used technique for making ethers is the Williamson ether synthesis. A metal alkoxide displaces a halide ion from an alkyl halide in an SN2 reaction.
Explain about the alkoxide ?An alkoxide is a chemical compound that is the conjugate base of an alcohol. It is made up of an organic group and a negatively charged oxygen atom via bonding together. In writing, they appear as RO, where R stands for the organic substituent. Alkoxides are potent bases, excellent nucleophiles and ligands when R is not bulky.
An oxygen atom attached to an sp3 carbon atom by an ion with a negative formal charge (often, but not always, part of an alkyl group). the alcohol's conjugate base. Methoxide ion, or CH3CH2O, is the conjugate base of methanol.
When an alcohol's hydroxyl group reacts with a metal, a hydrogen atom is taken out, forming an organic functional group known as an alkoxide. It is alcohol's conjugate base.
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A chemical company has just employed you to solve their financial dilemma. The company has an overabundance of silver nitrate solution and a huge debt that it must settle or announce bankruptcy.
Evaluate the following data and suggest a chemistry based plan for the company that may just prevent it from going bankrupt. (Hint: Think about a type of reaction and how it might be used to make the company money. The answer should include the reaction and an explanation. Use the information below.)
Answers
To solve the financial dilemma, the chemical company can consider using the excess silver nitrate solution to synthesize silver nanoparticles, which have various applications in industries.
What is Silver nanoparticles?Silver nanoparticles can be synthesized by reducing silver ions with a reducing agent, and silver nitrate can serve as a source of silver ions.
One possible reaction for the synthesis of silver nanoparticles using silver nitrate is the reduction of silver ions with sodium borohydride (NaBH4). The reaction can be represented as:
AgNO3 + NaBH4 → Ag nanoparticles + NaNO3 + B2H6
In this reaction, silver nitrate is the oxidizing agent, which accepts electrons, while sodium borohydride is the reducing agent, which donates electrons to reduce the silver ions. The reaction also produces sodium nitrate and borane gas as byproducts.
The synthesized silver nanoparticles can be sold to various industries, generating revenue for the company and potentially reducing their debt. The company can also consider optimizing the synthesis process to increase the yield and purity of the silver nanoparticles, which can increase their market value.
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a 250 ml sample of saturated a g o h solution was titrated with h c l , and the endpoint was reached after 2.60 ml of 0.0136 m h c l was dispensed. based on this titration, what is the k s p of a g o h ?
Answers
The ksp of AgOH is 1.98×10⁻⁸.
AgOH+HCL⇒AgCL(s)+H²O
Knowing the response⇒C₁V₁=C₂V₂
(AgOH) (HCL) (HCL)
By replacing, we obtain
⇒C₁×250ml=0.0136×2.60ml
C₁=0.0136×2.60/250
=0.000141
Now
AgOH=Ag+(OH)-
Hence,
=s²
=(0.000141)²
=1.98×10⁻⁸
So, the aforementioned answer is correct.
Why do you use the term "titration"?Titration is a method of chemical analysis where the quantity of a sample's ingredient is determined by adding a precisely measured amount of a different substance to which the desired constituent will react in a specific, known proportion.
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Which amino acid is NOT capable using its side chain to participate in general acid-base catalysis?
a. Ser
b. His
c. Asp
d. Lys
e. Val
Answers
Answer:
Explanation:
e. Val (Valine)
The reaction of 50 mL of Cl2 gas with 50 ml of CH4 gas via the equation Cl2(g) + CH4 (g) → HCl(g) + CH3C0g) of mL of products if pressure and temperature are kept constant. A) 50 B) 200 C) 150 D) 250 E) 100
Answers
Total 100 mL of products will be formed if pressure and temperature are kept constant.
What is pressure?
Pressure is a measure of the force exerted per unit area on a surface. It is defined as the ratio of force to the area over which the force is applied.
The balanced equation for the reaction is:
Cl_2(g) + CH_4(g) → HCl(g) + CH(_3)CO(g)
According to the balanced equation, the stoichiometric ratio between Cl_2 and HCl is 1:1.
Similarly, for CH_4 and CH_(3)CO, the stoichiometric ratio is also 1:1.
Given that the initial volumes of Cl_2 and CH_4 are both 50 mL, we can see that the volume of the products will be equal to the sum of the volumes of HCl and CH_(3)CO.
Volume of HCl = 50 mL
Volume of CH_(3)CO = 50 mL
Total volume of products = Volume of HCl + Volume of CH_(3)CO
= 50 mL + 50 mL
= 100 mL
Therefore, the total volume of products formed in the reaction if pressure and temperature are kept constant is 100 mL (option E).
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What makes solids, liquids, and gases different. Explain the hypothesis, prediction and experiments that can lead to scientific theory.
Answers
Answer: Gases, Liquids, and Solids
Gases
Explanation:
Behavior
gas liquid solid
assumes the shape and volume of its container
particles can move past one another assumes the shape of the part of the container which it occupies
particles can move/slide past one another retains a fixed volume and shape
rigid - particles locked into place
compressible
lots of free space between particles not easily compressible
little free space between particles not easily compressible
little free space between particles
flows easily
particles can move past one another flows easily
particles can move/slide past one another does not flow easily
rigid - particles cannot move/slide past one another
a hypothesis is a prediction based on a theory. If the Hypothesis comes true the theory is more accepted.
A scientific theory differs from a scientific fact or scientific law in that a theory explains "why" or "how": a fact is a simple, basic observation, whereas a law is a statement (often a mathematical equation) about a relationship between facts.
Look at the following enthalpy diagram. Select all that apply.
1. The products have more energy than the reactants.
2. This is an addition reaction.
3. A large activation energy is required for this reaction to take place.
4.The products are more stable than the reactants.
5. This is a substitution reaction.
Answers
Answer:
Option 2 and 4 are correct
Explanation:
The reactants in the attached image have more enthalpy and hence less stability as they are more reactive. Thus, Product is more stable than the reactants.
This is an addition reaction in which two reactants add up to form the product.
Very less activation energy is required as the reactants themselves are unstable, possess high energy and hence are very reactive.
Reactants have more energy than the products.
Which sentences describe the logistic growth model?
There are three different phases of the S-shaped curve. At first, growth is exponential because individuals are few and resources are plenty. This growth model occurs in a situation where resources are plenty and individuals are few to consume the resources. Population growth decreases as resources become limited. When a population size reaches the carrying capacity of its environment, the population growth slows down or stops completely. The model looks like a J-curve.
Answers
The sentences describe the logistic growth model is when a population size reaches the carrying capacity of its environment, the population growth slows down or stops completely.
What is logistical growth?Logistic or sigmoidal growth involves exponential population growth followed by a steady reduction in population growth until the population size stabilizes, assuming an S-shaped curve.
In this case, we can say this affirmation is true for the S-curve, but not the J-curve.
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A gasoline engine absorbs 2500 j of heat and performs 1000 j of mechanical work in each cycle. The efficiency of the engine is.
Answers
The efficiency of the engine that absorbs 2500 J of heat and performs 1000 J of mechanical work in each cycle is 40%.
The formula for the engine's efficiency is as follows:
η = (W/Q) x 100
η = the engine efficiency
W = work done by the engine
Q = heat absorbed by the engine
Q = 2500 J is the amount of heat that a gasoline engine can absorb.
Engine performs mechanical work at a rate of W = 1000 J.
The idea of engine efficiency is frequently used to rate and quantify the propensity to perform work. The ratio of work produced to the amount of heat supplied is used to express it.
So, the efficiency of the engine:
η = (W/Q) x 100
= (1000 J / 2500 J) x 100
= 0.4 x 100
= 40%
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choose the statement below that is false. question 2 options: a) a weak acid solution consists of mostly non ionized acid molecules. b) nonelectrolyte solutions do not conduct electricity. c) strong electrolytes completely dissociate into ions in water. d) a strong acid solution consists of only partially ionized acid molecules. e) a molecular compound does not ionize in solution.
Answers
Answer:
a weak acid consist of mostly non ionized acid molecule
what is the pH of 6×10^-9
Answers
The pH of a solution with concentration of 6 × 10-⁹ is 8.22.
How to calculate pH?The pH of a solution is a measure of the degree of acidity or alkalinity of its solution.
The pH of a solution can be calculated using the following expression;
pH = - log {H}
Where;
H = hydrogen ion concentrationAccording to this question, a solution has a concentration of 6 × 10-⁹M. The pH can be calculated as follows:
pH = - log {0.000000006}
pH = 8.22
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n a 2 s ( a q ) na2s(aq) and h g ( n o 3 ) 2 ( a q ) hg(no3)2(aq) are mixed. the illustration below represents the system after there are no longer any observable changes. created for albert. all rights reserved. which of the following statements most accurately describes the reaction?
Answers
Sodium sulfide is created when the elements sodium (Na) and sulfur (S) combine. It is a combination reaction, and the balanced equation is 2Na(s)+S(s)fuseNa2S.
If the resulting compound is water-insoluble, a precipitate will form. For instance, a solution of magnesium bromide and silver nitrate (AgNO3) In these reactions, two compounds exchange ions to create two new compounds. As an illustration, consider Na2S + 2HCL + 2NaCl + H2S.
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What type of ignition occurs when a mixture of fuel and oxygen encounter an external heat source with sufficient heat?
Answers
The ignition occurs when a mixture of fuel & oxygen encounter an external heat source with sufficient heat Piloted ignition.
What is Piloted ignition?When a volatile fuel is close to a nearby local energy source (pilot) and reaches its lower limit of flammability in air, piloted ignition may be possible. The flame that originates in the premixed system spreads outward from the pilot. The first law of thermodynamics for systems with fixed mass only describes the energetics of this process.
Definition of thermodynamicsThe science of thermodynamics examines how heat, work, temperature, and energy are related. The general topic of thermodynamics is the transfer of energy from one location or form to another. The fundamental idea is that heat is a type of energy that is equivalent to a specific quantity of mechanical labor.
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