Answer:....
Explanation:...
Which of the following answers is true for the following statement?
The conjugate acid of a strong base is:
O aweak acid
O an amphiprotic acid
O a polyprotic acid
O a lousy (or very weak) acid
O a strong acid
it is either "aweak acid or a lousy (or very weak) acid"
TEST QUESTION FOR CHEMISTRY GENIUSES ONLY...
Answer:
HBr has an electronegativity difference of .76 because Hydrogen's electronegativity is 2.2 and the electronegativity of Bromide is 2.96, and by the chart, it has a polar-covalent bond
Hope this helps!
(R)-Limonene is found in many citrus fruits, including oranges and lemons. Draw its structures and identify the relationship between them.
Answer:
we cant draw jn this
Explanation:
because it contin citric acid
What effect does
hybridization have on boods,
Heat flows from hotter objects to colder objects until it reaches a state where heat is no longer flowing. What have the objects reached when heat is no longer
flowing?
Answer:
It has reaced thermal equlibrum
Which of the following has the highest viscosity?
A. Honey
B. Milk
C. Water
D. Oil
The highest viscosity has honey
Answer:
The highest viscosity is honey.
How would you write 0.620 in scientific notation?
Which phrase describes a compound that consist of two elements
Carbon dioxide, nitrous oxide, and methane are all compounds that consist of two elements
Which of the following represents a beta decay?
O A. 220/86 Rn → 294/84Po + 4/2 He
O B. 60/28 Ni → 60/28 Ni + y
C. 235/93 Np → 23/91 Pa+ x
O D. 213/83 Bi → 214/84 Po+0/-1e
Answer:
Option D
Explanation:
Parent isotope has 83 protons, daughter isotope has only one more proton (84). Beta particle is very small, atomic mass of 212 stays the same in beta decay.
[tex]^2^1^2_8_3Bi\;\rightarrow\;^2^1^2_8_4Po\;+\;^0_-1e[/tex] represents a beta decay. Parent isotope has 83 protons, daughter isotope has only one more proton (84). Beta particle is very small, atomic mass of 212 stays the same in beta decay.
What beta decay?In nuclear physics, beta decay (β-decay) is a type of radioactive decay in which a beta particle (fast energetic electron or positron) is emitted from an atomic nucleus, transforming the original nuclide to an isobar of that nuclide.
[tex]^2^1^2_8_3Bi\;\rightarrow\;^2^1^2_8_4Po\;+\;^0_-1e[/tex]
In beta decay, one of the neutrons in the nucleus suddenly changes into a proton, causing an increase in the atomic number of an element.
Hence, option D is correct.
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Usually potassium hydrogen phthalate is kept very pure. But Stu Dent thinks the bottle of potassium hydrogen phthalate has been accidently mixed with sodium chloride salt. He decides to use a titration to determine the amount of potassium hydrogen phthalate present. He weighs 2.3854 g of the contaminated potassium hydrogen phthalate mixture. The titration uses 17.47 mL of 0.5000 M sodium hydroxide. Use the titration volume and concentration to calculate the moles of potassium hydrogen phthalate actually reacted. Then use the molar mass (204.2 g/mol) to calculate the mass of potassium hydrogen phthalate actually reacted. Enter the mass to 4 significant digits with units of g.
Answer:
1.784 g
Explanation:
The equation of the reaction is;
NaOH(aq) + KHC8H4O4(aq) --------> KNaC8H4O4(aq) + H2O(l)
Number of moles of NaOH reacted = 17.47/1000 * 0.5000 M
Number of moles of NaOH reacted =8.735 * 10^-3 moles
From the reaction equation;
1 mole of NaOH reacted with 1 mole of KHC8H4O4
Hence, 8.735 * 10^-3 moles of NaOH reacts with 8.735 * 10^-3 moles of KHP.
So,
Mass of KHP reacted = 8.735 * 10^-3 moles * 204.2 g/mol = 1.784 g
(100 PTS NEED HELP ASAP)
Water waves are surface waves. The energy of the waves moves...
only perpendicular to the motion of the wave
only parallel to the motion of the wave
both parallel and perpendicular to the wave
Answer:
Explanation:
Waves are actually energy passing through the water, causing it to move in a circular motion. ... This phenomenon is a result of the wave's orbital motion being disturbed by the seafloor.
The direction a wave propagates is perpendicular to the direction it oscillates for transverse waves. A wave does not move mass in the direction of propagation; it transfers energy.
Sugar is made of carbon , hydrogen, and oxygen atoms. sugar is ?
Answer:
The white stuff we know as sugar is sucrose, a molecule composed of 12 atoms of carbon, 22 atoms of hydrogen, and 11 atoms of oxygen (C12H22O11). Like all compounds made from these three elements, sugar is a carbohydrate.
Explanation:
which of the following is the ether- containing analgesic drug (pain fever reducer) that likely contributed to the death of famous aviator howard hughes
Answer:
Happy Birthday HAHAHAHAHAYAHYAHAHAH
Phenacetin is the ether-containing analgesic drug that is likely to contribute to the death of famous aviator Howard Hughes.
What is phenacetin?It is a drug used for relieving pain and reducing fever.
It was taken off the market as a medicine in the 1970s because it was deemed hazardous.
This was the reason for the death of the famous aviator Howard Hughes.
The chemical formula of [tex]\rm C_1_0H_1_3NO_2[/tex].
Thus, the correct option is C, phenacetin.
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Hey! I was wondering how to get the solution to this question!
A solution was prepared by dissolving 0.541 g of benzoic acid (HC6H5COO) in 100 mL of
water. The pH was measured to be 2.78. What is the Ka for benzoic acid?
Answer:
6.22 × 10⁻⁵
Explanation:
Step 1: Write the dissociation reaction
HC₆H₅COO ⇄ C₆H₅COO⁻ + H⁺
Step 2: Calculate the concentration of H⁺
The pH of the solution is 2.78.
pH = -log [H⁺]
[H⁺] = antilog -pH = antilog -2.78 = 1.66 × 10⁻³ M
Step 3: Calculate the molar concentration of the benzoic acid
We will use the following expression.
Ca = mass HC₆H₅COO/molar mass HC₆H₅COO × liters of solution
Ca = 0.541 g/(122.12 g/mol) × 0.100 L = 0.0443 M
Step 4: Calculate the acid dissociation constant (Ka) for benzoic acid
We will use the following expression.
Ka = [H⁺]²/Ca
Ka = (1.66 × 10⁻³)²/0.0443 = 6.22 × 10⁻⁵
HELP
Carla and Maurice are recording the temperatures of classrooms at their school, but they're using two different
thermometers. They plan to present their readings in both kelvins and degrees Celsius. Help the students convert their
temperatures from one scale to the other.
Type the correct answer in each box.
Answer:
1. 25.19
2. 301.57
Explanation:
it says it's correct...
The conversion of units of temperatures from one scale to the other which is measure by Carla and Maurice are given as.
298.34 K = 25.34°C
28.42°C = 301.42 K
How many units of temperature there?The temperature can be measure by using three units.
Kelvin abbreviate as KCelsius abbreviate °CFahrenheit abbreviate FRelationship between Kelvin (K) and Celsius (°C)
Let the value of temperature in Celsius (°C) unit as X °C, then value of this temperature in Kelvin (K) is,
X °C = 273 + X °C = (273 + X) K
Let the value of temperature in Kelvin (K) as Y K , then value of this temperature in Celsius (°C) is,
Y K = Y K - 273 = (Y - 273) °C
If 298.34 K
Then 298.34 K = 298.34 K - 273 = 25.34°C
If 28.42°C
Then, 28.42°C = 273 + 28.42°C = 301.42 K
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Safurared Solution changes into Unsaturated
by heating
Answer:
Yes it is because heating expands molecules of solution which helps to form a solution as it acts as solvent solution.
Explanation:
ILL GIVE BRAINLIEST!
Answer:
A since dormant volcanoes haven't erupted for a long time but are expected to erupt again in the future.
Explanation:
Look at Periodic Table. Which
element has 7 valence
electrons and is in period 3?
A. Fluorine
B. Sulfur
C. Chlorine
D. Bromine
Phosphorus is implanted into silicon. The implant parameters are a dose of 1015cm-2at an energy of 150keV.a)Find the depth of the peak of the implant profile and its value at that depth.b)If the wafer originally had 1016cm-3of boron uniformly distributed throughout, find the depth(s) at which the concentration of phosphorus is equal to the concentration of boron.
Answer:
a) ≈ 4.99 / cm^3
b) 0.515 um
Explanation:
Given data:
energy = 150 Kev
dose of 10^15 cm^-2
A) find the depth of the peak of the implant profile and its value at that depth
expression for implant profile = written below in the attached file
value of the peak depth ≈ 4.99 / cm^3
B ) determine the depth at which the concentration of phosphorus is equal concentration of boron
= 0.515 um
attached below is the detailed solution to the problem
Water Cycle, what percentage of Earths water can be found in soil?
How many moles of phosphorus are in a sample of 40.4 grams of phosphorus I NEED HELP FAST
Answer:
1.30 mol P
Explanation:
take what is given to you (40.4g). now divide it by the molar mass of the asked element (phosphorus = 30.97g/mol)
40.4g P / 30.97g/mol P = 1.30 mol P
hope this helps :)
what is the difference between zinc and magnesium
Based on appearances, which group of animals likely has the greatest genetic diversity?
bears
horses
whales
birds
Mention two functions performed by the concentrated sulfuric acid in the reaction
Answer:
Concentrated sulfuric acid is used as a catalyst, and has a dual role:
-Speeds up the reaction.
-Acts as a dehydrating agent, forcing the equilibrium to the right and resulting in a greater yield of ester.
The two functions performed by the concentrated sulfuric acid in the reaction is that Concentrated sulphuric acid often removes molecules of water from formic acid and it acts as a dehydrating agent in creation of carbon monoxide.
The function of the concentrated sulfuric acid in a reaction is that Concentrated sulfuric acid can be used as a catalyst.
It help to Speeds up the reaction and can also be a dehydrating agent, by bringing in the equilibrium to the right and leading to a greater yield of ester.
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Fill in the blanks.
The regioselectivity of a reaction is often based on the energetics of the reaction. The kinetic product of a reaction is the product with the ____________.
The kinetic product is favored when the temperature is ________.
The thermodynamic product of a reaction is the product with the ____________.
The kinetic product is favored when the temperature is ___________.
Answer:
vcfg
Explanation:
The kinetic product of a reaction is the product with the high energy and favored when the temperature is low. The thermodynamic product of a reaction is the product with the low energy and favored when the temperature is high.
What is regioselectivity?Regioselectivity is that part of any chemical reaction where if product is formed by more than one ways than only one way will be prefererd in this condition.
In any system if chemical reaction is occur at low temperature then the fast formed product is the stable product which is kinetically favored, and have the high energy.In any system if chemical reaction is occur at high temperature then the slow formed product is the stable product which is thermodynamically favored, and have the low energy.Hence correct options are high energy, low, low energy and high.
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Draw a mechanism for this reaction. In the reaction scheme, an acyl chloride reacts with an acid to give an acid anhydride. The acyl chloride contains a central C atom that has a double bond to O, a single bond to Cl, and a single bond to a benzene ring. The acid is CH3COH with an O atom double-bonded to the second (from left to right) carbon. The produced anhydride is COCCH3 with a benzene ring attached to the first (from left to right) carbon and an O atom double-bonded to the firth and the second carbons.
Answer:
See explanation and image attached
Explanation:
The reaction shown here is the reaction between an acyl chloride and a carboxylic acid. This reaction produces an acid anhydride.
The first step in the reaction is the nucleophillic attack of the acid on the acyl carbon of the acyl chloride. This is followed by loss of HCl to yield the acid anhydride as shown in the image attached.
The product formed is PhCOOCOCH3.
define saturated and unsaturated fats
Answer:
i don't no the
answer
i am sorry
Answer:
Saturated fats: Saturated fats are a type of fat-containing a high proportion of fatty acid molecules without double bonds, considered to be less healthy in the diet than unsaturated fat.
Unsaturated fats: Unsaturated fats are a type of fat-containing a high proportion of fatty acid molecules with at least one double bond, considered to be healthier in the diet than saturated fat.
10. Many cooking pans are made of aluminium although it is a reactive metal, Explain.
Answer:
Aluminium is a highly reactive metal yet it is used to make utensils for cooking this is because aluminium reacts with oxygen present in air to form a thin layer of Aluminium oxide is oxide layer is very stable and prevent for the reaction of aluminium with oxygen
Diabetes mellitus is characterized by too much glucose buildup in the blood. In _________________ diabetes, this is because the target cells of the body's tissues fail to respond to insulin; in later stages of this type of diabetes, the _______________ begins to fail and eventually stops secreting the hormone insulin, which is required to decrease blood glucose levels. In ______________ diabetes, this is because there are ______________ number of beta cells available to secrete insulin; this results in an insufficient amount of insulin to meet the demands of the body.
Now, choose the individual who is most likely to have type 2 diabetes:
A. A 6-year-old child
B. A 62-year-old inactive man who is tired all the time
C. A 40-year-old runner with tendonitis
D. An overweight teenage girl whose grandmother has diabetes
Diabetes mellitus is characterized by too much glucose buildup in the blood. In Type 2 diabetes, this is because the target cells of the body's tissues fail to respond to insulin; in later stages of this type of diabetes, the pancreas begins to fail and eventually stops secreting the hormone insulin, which is required to decrease blood glucose levels. In Type 1 diabetes, this is because there are less number of beta cells available to secrete insulin; this results in an insufficient amount of insulin to meet the demands of the body. A 62-year-old inactive man who is tired all the time is most likely to have a type 2 diabetes.
What are pancreas?It is an organ located in abdominal region.It severs as an endocrine as well as an exocrine gland.The hormones produced by it helps in regulating blood glucose level.As an endocrine gland, it secretes hormone insulin which coverts glucose into glucagon and glucagon which converts glucagon into glucose.As an exocrine gland, it secrete juices that helps in digestion. What is diabetes mellitus?It is a condition in which you body's blood glucose level is high.The pancreas does not produce enough insulin that is required by our body.It is of three types: Type 1, Type 2 and gestational diabetes.Type 1 diabetes is a condition in which the immune system of our body destroys the beta cells of pancreas that secretes insulin.Type 2 diabetes: In this the beta cells of pancreas are very low and it does not make enough insulin to meet the demands of the body.Type 2 diabetes is usually occurs in person of over 45 years age.Hence, the correct option is B. A 62-year-old inactive man who is tired all the time.
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A chemical plant produces ammonia using the following reaction at high
temperature and high pressure. Which issue are plant engineers and
investors most likely to see as a drawback of this method?
3H2 + N2 = 2NH3 + energy
A. This reaction system will solidify at a higher temperature and
obstruct the equipment.
B. The high temperature will increase the rate of the reactant-favored
reaction at equilibrium.
C. The high pressure will increase the rate of the reactant-favored
reaction at equilibrium.
D. Maintaining a high temperature will require burning fossil fuels or
using a great deal of electricity.
Answer:
D. Maintaining a high temperature will require burning fossil fuels or
using a great deal of electricity.
Explanation:
The chemical plant produces ammonia using the following reaction at high temperature and high pressure the issue is "Maintaining a high temperature will require burning fossil fuels or using a great deal of electricity.
What is the chemical plant?An industrial processing facility known as a "chemical plant" produces chemicals, typically on a large scale.
What are fossil fuels?The components of fossil fuels are decaying plants or animals. These fuels may be consumed to provide energy and could be discovered in the crust of the Earth. Fossil fuels include, for example, coal, oil, as well as natural gas.
Therefore, the chemical plant produces ammonia using the following reaction at high temperature and high pressure the issue is "Maintaining a high temperature will require burning fossil fuels or using a great deal of electricity.
Hence, the correct answer will be option (D)
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