The new pressure, P₂ is 6000 atm.
Calculation:Given,
P₁ = 1.5 atm
V₁ = 40 L = 40,000 mL
V₂ = 10 mL
To calculate,
P₂ =?
Boyle's law is applied here.
According to Boyle's law, at constant temperature, a gas's volume changes inversely with applied pressure.
PV = constant
Therefore,
P₁V₁ = P₂V₂
Put the above values in the equation,
1.5 × 40,000 = P₂ × 10
P₂ = 1.5 × 4000
P₂ = 6000 atm
Therefore, the new pressure, P₂ is 6000 atm.
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What is an ethical vacuum?
A. When technology has created something for which we do not have an ethical framework yet.
B. A philosophy that ethics cannot exist in a vacuum, but need specific examples to be valid.
C. The situation of being without ethics.
D. A scientific idea that lacks ethics.
Answer:
A
Explanation:
when technology has created something for which we don't have an ethical framework is called ethical vacuum .
Answer: A
Explanation: A is the correct answer because when technology has created something in which we do not have an ethical framework yet its a called a vacuum.
A barium hydroxide solution is prepared by dissolving 2.81 g of Ba(OH)2 in water to make 25.6 mL of solution. What is the concentration of the solution in units of molarity
The concentration of the solution in units of molarity is 0.64 M and the concentration of the solution in terms of g/mL is 0.10976 g/mL.
What is the concentration of the solution?The measure of the amount of the solute dissolved in the given amount of the solvent or solution is said to be the concentration of the solution.
It is given by the expression,
Concentration of the solution = mass of the solute/total volume of the solution
Units: g/mL
What is the concentration of the solution in units of molarity?The concentration of the solution in units of molarity is given by the expression,
Molarity = (no. of moles of the solute)/(Volume in L)
Units: moles/L
Calculation:It is given that the solute is barium hydroxide - Ba(OH)₂
The mass of Ba(OH)₂ = 2.81 g
When in dissolved in water, the total volume of the solution = 25.6 mL
The molar mass of Ba(OH)₂ = 171.34 g/mol
Then,
No. of moles = (mass of Ba(OH)₂)/(molar mass of Ba(OH)₂)
i.e.,
No. of moles = [tex]\frac{2.81}{171.34}[/tex] = 0.0164 mole
Concentration = mass of the solute/total volume
I.e., C = [tex]\frac{2.81}{25.6}[/tex] = 0.10976 g/mL
Then the concentration of the solution in units of molarity is,
Molarity = (no. of moles)/(Volume of the solution in L)
⇒ Molarity = [tex]\frac{0.0164}{25.6/1000}[/tex] = 0.64 M
Therefore, the concentration of the solution in units of molarity is 0.64 M.
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are oxidized to carboxylic acids with the ____________ , which is an oxidizing agent that contains silver oxide and aqueous ammonium hydroxide.
Aldehyde are oxidized to carboxylic acids with the Tollen's Reagent which is an oxidizing agent that contains silver oxide and aqueous ammonium hydroxide.
What is Aldehyde ?An Aldehyde is a functional group which contains the carbonyl group that is -C=O. The structure for aldehyde is R¹ - C = O - R² where R¹ and R² = H.
Example of Aldehyde is Methanal. The structure of Methanal is H - C = O - H.
What is Tollen's Reagent ?Tollens's Reagent is a classical reagent which is widely used in the detection of an aldehyde functional group, an alpha hydroxy ketone functional group and an aromatic aldehyde group in a given test substance.
Thus from the above conclusion we can say that Aldehyde are oxidized to carboxylic acids with the Tollen's Reagent which is an oxidizing agent that contains silver oxide and aqueous ammonium hydroxide.
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Disclaimer: The question was given incomplete on the portal. Here is the complete question.
Question: _________ are oxidized to carboxylic acids with the ________ which is an oxidizing agent that contains silver oxide and aqueous ammonium hydroxide.
Identify the steps that are followed in taking a stratified random sample. i. Take a sample of size n/k from each strata, where n is sample size and k is the number of strata. ii. Determine what portion of the sample should come from each strata. iii. Measure the size of the strata as a proportion of the population. iv. Take a systematic sample from the population as a whole. Take random samples from each strata.
steps that are followed in taking a stratified random sample are
i. Take a sample of size n/k from each strata, where n is the sample size and k is the number of strata
iv. Take a systematic sample from the population as a whole. Take random samples from each strata.
Stratified random sampling is a sampling method that divides the population into smaller groups called layers. Groups or hierarchies are organized based on the common characteristics or attributes of the members in the group. The process of dividing the population into groups is called hierarchization.
Stratified Random Sample Example:
Suppose a research team wants to determine a GPA for a college student in the United States. The research team is having a hard time collecting data from all 21 million college students. We decided to use 4,000 students to extract a random sample of the population.
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How many grams of ethylene glycol (C2H6O7) must be added to 1.00 kg of water to produce a solution that freezes at -5.00C
0.03 g of ethylene glycol (C2H6O7) must be added to 1.00 kg of water to produce a solution that freezes at -5.00C.
How to calculate the amount of solution with freezing point ?[tex]\Delta T_{f} = K_{f} m[/tex]
where,
ΔTf = Change in freezing point
Kf = molal freezing point depression constant of the solvent
m = moles of solute per kilogram of solvent.
Now,
[tex]\Delta T_{f} = K_{f} m[/tex]
[tex]\Delta T_{f} = K_{f} \times \frac{W_2}{M_2} \times \frac{1000}{W_1}[/tex] [-5.00°C = 273 + (-5.00) = 268 K] [tex]268 = 1.86 \times \frac{W_2}{62} \times \frac{1000}{0.001}[/tex] [1.00 kg = 0.001 g]
[tex]W_{2} = \frac{268 \times 62 \times 0.001}{1000 \times 1.86}[/tex]
= 0.03 g
Thus from the above conclusion we can say that 0.03 g of ethylene glycol (C2H6O7) must be added to 1.00 kg of water to produce a solution that freezes at -5.00C.
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If 65.39 g of zinc are mixed with some unknown mass of hydrochloride acid, 136.29 g of zncl2 are formed along with 2.00 g of hydrogen gas. what mass of hydrochloric acid was used?
How much hydrogen chloride acid was used?
72.916 g of hydrochloric acid was used.
Given:
Mass of Zn = 65.39 g
Mass of [tex]ZnCl_{2}[/tex] =136.29 g
Mass of [tex]H_{2}[/tex] = 2 g
Equation:
The chemical equation for the reaction of zinc with hydrochloric acid:
Zn + 2HCl → Zn [tex]Cl_{2}[/tex] + [tex]H_{2}[/tex]
Hydrogen gas is created when zinc combines with hydrochloric acid, which causes the process to bubble ferociously. Another sign that a chemical reaction is taking place is the generation of a gas.
Calculation:
A number of equivalents equate:
Number of equivalents = [tex]\frac{given mass}{Molecular Mass}[/tex] x 1000 x equivalent factor
[tex]\frac{x}{36.458}[/tex] x 1000 x 1 = [tex]\frac{136.29}{136.286}[/tex] x 1000 x 2
[tex]x[/tex] = 36.458 x 2
[tex]x[/tex] = 72.916
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What is the importance of the shape of a conical flask?
The shape allows the flask to be sealed with a bung for heating purposes, while also allowing a researcher the freedom to shake or stir the flask without spilling liquid.
Explanation:
Hope it helps you!!Find concentration of solution of 45g of glucose is dissolved in water to prepare 500g solution?
Answer:
9% solution by mass
Explanation:
If there is 500 gm of solution and 45 g of it is glucose then:
45/500 * 100% = 9 % solution
5. A drinking water sample was analyzed for fecal contamination. There are 65 colonies from a 10-2 dilution and plated 0.1mL. What is the number of CFU's per milliliter of water
65 * 10^3 CFU's per milliliter of water.
CFU stands for a colony-forming unit. which means that cfu/g is a colony-forming unit in line with gram and CFU/ml is a colony-forming unit in step with milliliter. A colony-forming unit is where a colony of microbes grows on a petri dish, from one unmarried microbe.
Colony Forming devices are a time period from Microbiology. CFU offers an indication of the quantity of residing microorganisms in a liquid. This quantity, determined with the aid of counting the individual colonies, describes the number of cells of organisms within the water, which can be capable of multiplying.
Whilst you do plate be counted of micro organism you are making serial suspension dilution in saline buffer or any other diluent, and then you plate a sure quantity (one hundred microliters on a 9cm Petri plate) you unfold and incubate and then you definitely depend on the range of colonies shaped.
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When a suitable alkyl halide is treated with a nucleophile, a substitution reaction can occur in which the leaving group is replaced by a(n) ____________. In an elimination reaction, a(n) ___________ is removed and a leaving group is expelled, giving an alkene.
When a suitable alkyl halide is treated with a nucleophile, a substitution reaction can occur in which the leaving group is replaced by a nucleophile.
In an elimination reaction , hydrogen halide is removed and a leaving group is expelled, giving an alkene.
In nucleophilic substitution reactions ,nucleophile attacks on the electrophilic group and replaces this group. In an elimination reaction, certain atoms in pair are removed from the compound.A Nucleophile is a electron rich reactant which provides electron in the reaction to form a bond. An Electrophile is a electron deficient group which accepts the electrons from a electron rich group.Learn more about nucleophiles here..
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Drag the tiles to the correct boxes to complete the pairs.
Match each orbiting body to its attribute.
varies greatly in size
from one to the next
has a characteristic
glow
usually burns up if it
enters Earth's atmosphere
primarily made of hydrogen
and helium
comet
arrowRight
meteoroid
arrowRight
gas giant
arrowRight
asteroid
The match up of the left to the right column is;
1. Asteroid - A) varies greatly in size from one to the next
2. Gas Giant - B)atmosphere is primarily made of hydrogen and helium
3. Comet- C) has a characteristic glow
4. Meteoroid - D) usually burns up if it enters the earth's atmosphere
What is asteroid and meteoroid?An asteroid is known to be a kind of a small rocky object that is said to often orbits the Sun.
Note that an meteor is known or regarded as what occurs if ]a small piece of an asteroid or comet, known to be a meteoroid, burns up when they enter Earth's atmosphere.
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Answer:
edmentum :)
Explanation:
What is hyperconjugation
Hyperconjugation is the interaction between bonds in organic compounds.
What is hyperconjugation?Hyperconjugation is the relationship or interaction that exist between multiple bonds molecules and single bond molecules in organic compounds.
Therefore, Hyperconjugation is the interaction between bonds in organic compounds.
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what makes carcinogens so dangerous?
Answer:
A carcinogen is any substance that promotes carcinogenesis, which is a type of deadly cancer to humans so essentially you are asking why a cancer-causing substance is dangerous...
Carcinogens cause genetic abnormalities that become tumors. So I suppose they are really dangerous because they heavily increase the likelihood of developing cancerous tumors :)
Answer:
Carcinongens usually can cause the change in the genetic information (DNA) which leads to mutation. The mutation can make the organs out of control of reproduction and cause cancer.
Explanation:
Carcinogens can be chemicals, or anything that induce cancer.
175 ml of a 1.6 m solution of kcl is diluted to a new volume of 1.0 l. what is the new concentration of the solution? (3 points)
0.13 m kcl
0.28 m kcl
0.85 m kcl
1.1 m kcl
175 ml of a 1.6 m solution of KCl is diluted to a new volume of 1.0 L. The new concentration of the solution is 0.28 m KCl.
Hence, Option (B) is correct answer.
What is Concentration ?Concentration is defined as the measure of how much substance there is mixed with another substance.
How to find the concentration ?To find the concentration use the dilution formula
C₁V₁ = C₂V₂
where,
C₁ = Concentration of starting solution
C₂ = Concentration of final solution
V₁ = Volume of the starting solution
V₂ = Volume of the final solution
Now put the values in above formula we get
C₁V₁ = C₂V₂
1.6 × 0.175 = C₂ × 1.0
0.28 = C₂ × 1.0
C₂ = 0.28
Thus from the above conclusion we can say that 175 ml of a 1.6 m solution of KCl is diluted to a new volume of 1.0 L. The new concentration of the solution is 0.28 m KCl.
Hence, Option (B) is correct answer.
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An enzyme _____. An enzyme _____. can bind to nearly any molecule is an organic catalyst increases the the activation energy of a reaction is a inorganic catalyst is a source of energy for endergonic reactions
An enzyme is an organic catalyst that can bind to nearly any molecule is an organic catalyst increases the activation energy of a reaction is an inorganic catalyst is a source of energy for endergonic reactions
Enzymes are substances that act as catalysts for living organisms and regulate the rate at which chemical reactions take place without a change in the process. The biological processes that occur in all living organisms are chemical reactions, most of which are controlled by enzymes.
Enzyme functions as an organic catalyst. A catalyst is a chemical that participates in a chemical reaction but is not modified by it. Many enzymes work by lowering the activation energy of the reaction.
Enzymes are called biocatalysts because they speed up the biochemical reactions of living organisms. Enzymes are called biocatalysts because they promote chemical reactions without changing the equilibrium state.
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What types of functional groups react to form the imine intermediate in the Strecker synthesis of amino acids
Strecker synthesis of amino acids:
Aldehyde and ketone are the functional groups that react to form the imine intermediate in the Strecker synthesis of amino acids.
Method of Strecker synthesis:
A method for synthesizing amino acids by the reaction of an aldehyde with ammonia in the presence of potassium cyanide is known as the Strecker amino acid synthesis. α-aminonitrile is produced by the condensation reaction, and this α-aminonitrile is then hydrolyzed to produce the required amino acid. The technique is applied commercially to make racemic methionine from methional.
Although primary and secondary amines also produce substituted amino acids, using ammonium salts only produces unsubstituted amino acids. Similar to this, using ketones in place of aldehydes results in amino acids that are α,α-disubstituted.
Reaction mechanism:
An aldehyde's carbonyl oxygen is protonated in the first phase of the reaction, which is followed by an ammonia nucleophilic attack on the carbonyl carbon. Water is separated from the intermediate iminium ion after a second proton exchange. The iminium carbon is then attacked by a cyanide ion, resulting in an aminonitrile.
The aminonitrile's nitrile nitrogen is protonated in the second step of the Strecker Synthesis, and a water molecule attacks the nitrile carbon. Proton exchange and a nucleophilic attack of water on the former nitrile carbon are followed by the formation of a 1,2-diamino-diol. The protonation of the amino group is then followed by the elimination of ammonia, and eventually, the deprotonation of a hydroxyl group results in the production of amino acids.
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Q: How many of the molecules shown contain only one covalent bond?
Cl₂ H₂ HCl N₂ O₂
A. 2 B. 3 C. 4 D. 5
Answer:
cl2 - 1 bond
HCl.- 1 bond
N2 - 3 bond
o2 - 2 bond
Cl requires one electron to complete it's octave so it share it's one electron with other chlorine and make a single covalent bond H has one electron and Cl requires one so both form one single bond N requires 3 electrons so it form 3 bonds with other N oxygen requires 2 electrons so it forms 2 bond with other oxygenHow can one tell if a reaction is a redox reaction?
a. spectator ions are present.
b. elements change phases.
c. a precipitate is formed.
d. electrons are gained and lost.
submit
Answer:
D.) electrons are gained and lost.
Explanation:
Redox reactions involve the change in oxidation states of the reactants. Oxidized molecules lose electrons whereas reduced molecules gain electrons. In redox reactions, the oxidation number of oxidized molecules decreases and increases in reduced molecules.
which of the following measurements are listed in the proper mathematical relationship?(Select all that apply)
A. PV = K
B. V/T = K
C. PV/T = K
D. P/V = K
The measurements which are listed in the proper mathematical relationship include:
PV=kV/T=kPV/T = kWhat is a Constant?This is used in mathematical expressions and has a constant value which doesn't change in expression.
Options A,B and C have the appropriate constants as pressure is usually multiplied by volume.
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Lawrencium-262 has a half-life of 4 hr. How much of a 40 mg sample remains after 12 hours?
Answer:
5 mg
Explanation:
If one half life is 4 hours, then 3 half lives is 12 hours.
This means that the sample will decay to 1/8 of its original amount.
So, the answer is 40(1/8) = 5 mg.
The remnants of an ancient fire in a cave in Peru showed a decay rate of 8.0 counts per minute per gram of carbon. Assuming that the decay rate in freshly cut wood is 12.7 counts per minute per gram of carbon, calculate the age of the remnants. The half life of 614C is 5730 years.
The age of the remnants is calculated as 3807 years.
What is the half life?The half life is the time taken for only half of the number of the radioactive atoms to remain.
Half life of carbon - 14 = 5730 years.
Initial count rate = 8.0 counts per minute per gram
Count rate at time t = 12.7 counts per minute per gram of carbon
Since;
0.693/t1/2 =2.303/t log (N/No)
0.693/5730 = 2.303/t log (12.7/8)
1.21 * 10^-4 = 2.303/t * 0.2
t = 2.303 * 0.2/1.21 * 10^-4
t = 0.4606/1.21 * 10^-4
t = 3807 years
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Set up the math. But don’t do any of it. Just leave your answer as a math expression. Also be should you’re answering includes all the correct unit symbols.
Answer:
See below
Explanation:
9 m * 2.16 kg/ m = ___________ kg ( see how the 'm' cancels out?)
The chemical equation for a reaction is shown below.
2 NO2(g) → N2O4(g)
What is the standard free energy change (ΔGo) in this reaction at 298 K? (NOTE: At 298 K, ΔGfo for NO2 is 51.84 kJ/mol, and for N2O4 is 98.28 kJ/mol.)
The standard free energy change (∆Gº') is the energy released when the products are created from the reactants. The (∆Gº') at 298 K is -5.40kJ.
What is standard free energy change?The standard free energy change is given by the sum of the standard free energies of the products subtracted from the sum of the standard free energies of the reactants, given as,
ΔG = ∑nΔG°products − ∑mΔG°reactants
Given,
ΔG°(NO₂) = 51.84 kJ/mol
ΔG°(N₂O₄) = 98.28 kJ/mol
Substituting values:
ΔG = ∑nΔG°products − ∑mΔG°reactants
= ΔG°(N₂O₄) − 2ΔG°(NO₂)
= 98.28 − 2(51.84)
= - 5.4
Therefore, -5.40 kJ is the standard free energy.
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What volume of a 0.167 M potassium hydroxide solution is required to neutralize 16.6 mL of a 0.366 M nitric acid solution
36.38 ml of a 0.167 M potassium hydroxide solution is required to neutralize 16.6 mL of a 0.366 M nitric acid solution.
Given that 16.6 mL of a 0.366 M nitric acid solution is neutralized by 0.167 M potassium hydroxide solution.
The balanced equation for the reaction is:
HNO₃ + KOH → KNO₃ + H₂O
From the equation given above,
Mole ratio of the acid, HNO₃ (nA) = 1
Mole ratio of the base, KOH (nB) = 1
From the question:
Molarity of the acid, HNO₃ (Ma) = 0.366 M
Volume of the base, KOH (Vb) =
Molarity of the base, KOH (Mb) = 0.167 M
Volume of the acid, HNO₃ (Va) = 16.6 ml
Now,
MaVa/ MbVb = nA/nB
0.366 × 16.6 / 0.167 × Vb = 1/1
6.0756 = 0.167 × Vb
Vb = 36.38 ml
Therefore, 36.38 ml of potassium hydroxide solution is required for the reaction.
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If the initial pressure of gas inside the balloon was 1.65 atm, what is the new pressure?
The new pressure of the gas is 4.95 atm.
What is the Boyles law?Boyles law states that the volume of a given mass of gas is inversely related to its pressure at constant temperature.
Given that;
V1 = 1.50 L
V2 = 0.50 L
P1 = 1.65 atm
Then;
P1V1 = P2V2
P2 = 1.65 atm * 1.50 L/ 0.50 L
P2 = 4.95 atm
The new pressure of the gas is found to be 4.95 atm.
Missing parts:
a balloon filled with a volume of 1.50 L is compressed to a volume of 0.50 L at a constant rate of temperature. if the initial pressure of the gas inside the balloon was 1.65 atm what is the new pressure?
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Question 12(Multiple Choice Worth 1 points)
[OSS.01] The picture below shows an early model of the solar system.
Saturn
Jupiter
Mara
Sun
Vanua
Mercury
Moon
Stars
Source http://dawn.iol.nasa.gov/DawnClassrooms/1 hist dawn/history discovery/Exploration outside_box.pdf
Why is this model useful to scientists?
Six-membered cyclic hemiacetals and five-membered cyclic hemiacetals are called, respectively, ________.
Six-membered cyclic hemiacetals and five-membered cyclic hemiacetals are called, respectively mannoses and xyloses.
What are cyclic hemiacetals?Cyclic hemiacetals are those molecules that contain both alcohol and a carbonyl group and can undergo an intramolecular reaction to form a cyclic hemiacetal.
Example of Cyclic hemiacetals are :
Mannoses: These are they type of Cyclic hemiacetals that contains Six-membered cyclic hemiacetals.Xyloses: These are they type of Cyclic hemiacetals that contains five-membered cyclic hemiacetals.Learn more about xyloses here:
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Six-membered cyclic hemiacetals and five-membered cyclic hemiacetals are called, respectively, pyranoses and furanoses.
What are hemiacetals?Hemiacetals are chemical compounds containing hydrogen or organic substituents in their molecules and formed by aldehydes or ketones.
The chemical formula of these hemiacetals compounds may be depicted as RHC(OH)OR'.
In conclusion, six-membered and five cyclic hemiacetals are pyranoses and furanoses.
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The ___________ of a chemical reaction shows how much product was actually made compared with the amount of product that was expected. A. percent yield B. atom economy C. actual yield D. exponential yield
The Actual yield of a chemical reaction shows the amount of product actually made
What is actual yield ?Actual yield in a chemical reaction is the exact amount of products that is produced in a chemical reaction other than the expected amount of products ( theoretical yield ) from the chemical reaction.
Hence we can conclude that the actual yield of a chemical reaction shows the amount of product actually made.
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Answer:
B.) Atom economy
Explanation:
Got it right on founders edtell
The flask contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. The buret contains 0.200 M NaOH. It requires 14.0 mL of the NaOH solution to reach the end point of the titration.
A buret filled with a titrant is held above a graduated cylinder containing an analyte solution.
What is the initial concentration of HCl
M₁V₁=M₂V₂
M₁ x 10 = 0.2 x 14
M₁ = 0.28
Chlorine and bromine have very similar chemical properties. This is best explained by the fact that both elements:
What is the similarity between chlorine and bromine?
Chlorine and bromine have very similar chemical properties and are best explained by the fact that they both belong to the category of halogens.
Similarities shared by halogens:
Chemical elements are represented as periods and groups on a periodic table. Chemical elements with comparable properties make up each category. Halogens are group 17 elements that are primarily non-metallic.
In the case of halogens, each element's atom possesses seven valence electrons, [tex]ns^{2} np^{5}[/tex], in which n stands for the energy level. The electron configuration of chlorine is [tex][Ne]3s^{2} 3p^{5}[/tex], and the electron configuration of bromine is [tex][Ar]3d^{10}4s^{2} 4p^{5}[/tex].
Because of comparable electron configurations, elements of the same group have similar properties. The number of valence electrons, which are located in the outermost (highest energy) s and p orbitals, is particularly similar.
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