A compound that binds to a receptor but does not activate the neuron is known as an Antagonist.
A receptor is a large protein molecule on a neuron that gets activated when a ligand binds to it such as a drug or hormone, or when electrical impulses pass through it.
An antagonist is a drug or hormone that binds to receptor, but instead of activating the receptor, it blocks or dampens the activation of the neuron. Antagonist drugs are used to interfere with the normal function or operation of a protein receptor.
Depending on the nature of the antagonist or the receptor it's bound to, the effects of antagonists may be permanent or temporary.
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Lauric acid is an organic compound composed of 71.95% c, 12.08% h, and the rest oxygen. if 0.141 mol of lauric acid has a mass of 28.2 g, what are the empirical and molecular formulas of lauric acid? empirical formula:
If 0.141 MOL of Lauric acid has a mass of 28.2 g, the empirical formula of lauric acid is C₁H₂O₁. And the molecular formula of lauric acid is C₁₂H₂₄O₂.
What is the empirical and molecular formula?The empirical formula is the simplest whole number ratios of the moles of the compounds. They are the atoms present in the compound.
The molecular formula tells the total number of atoms present in the element of a compound.
The empirical formula of lauric acid is C₁H₂O₁. if 0.141 MOL of lauric acid weighs 28.2 g. Lauric acid's chemical formula is C₁₂H₂₄O₂.
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If volume of a water sample is 11.3 ml and the mass is 11.349 g, what is the exact density of the sample?
The exact density of the water sample with volume 11.3ml and mass 11.349g is 1.004g/ml.
Density of a solution is defined as the ration of mass of the solution to the volume of the solution. Density is measured in g/cm³ for solids, g/ml for liquids, and g/L for gases.
As per the definition of density ,we can write
Density of solution = (Mass of the Solution / Volume of the solution)
Mass of the water sample = 11.349g
Volume of water sample = 11.3ml
Density of Water sample = (Mass of water sample/Volume of Water sample)
Density of Water sample = (11.349g / 11.3ml)
Density of Water sample = 1.004g/ml.
The exact density of the water sample with volume 11.3ml and mass 11.349g is 1.004g/ml.
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when an open cup of water sits in a table, it will evaporate over gime. do all liquids evaporate at the same rate? suppose you conduct an experiment to see how quickly water, rubbing alcohol and bail polish remover evaporate. describe theee important techniques you will have to follow to make sure your experminal procedure is repeatable and objective.
Answer:
Research Experiment
Abstract
The study is to investigate the rates of evaporation of liquids. It depends on the energy that the molecules possess. For the research, 4 beakers were filled with different liquids and made to stand for 7 days. The quantity left after the time period has elapsed determines the rate at which the liquids evaporate. Studying the individual characteristics of the liquids one could theorize the reason behind the varying rates of evaporation.
Introduction
The purpose of the experiment is to check whether different liquids evaporate at the same rate or not.
Problem Statement
Do all liquids evaporate at the same rate?
Hypothesis
Different liquids evaporate at different rates.
Materials
Orange juice
Alcohol
Nail polish remover
Water
4 beakers with graduations
Pen and paper
Step By Step Procedure
Pour 80 ml of each liquid in separate beakers.
Label the beakers with the names of the liquids
Place them in a dry location under room temperature.
Make a table on the paper to monitor the levels of the beaker for a week.
Calculate the ph of 1.0 l of an aqueous solution containing 75 mmol of mes (pka = 6.09) and 25 mmol of its conjugate base.
The pH of 1.0 l of an aqueous solution containing 75 mmol is 5.61
Here we calculate pH value
Given data is aqueous solution containing 75 mmol (pka = 6.09) and 25 mmol of its conjugate base
pH = pKa + log [A-]/[HA]
pH = 6.09 + log (25 mM/75 mM) = 6.09 - 0.48 =5.61
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Small stretches of a deoxyribonucleic acid molecule, situated as a particular site on a chromosome, are knows as?
The small stretches on a chromosome of a deoxyribonucleic acid (DNA) molecule on a particular site is known as gene.
Gene is a fundamental, structural and operational component of heredity in living beings. They serve as a blueprints for synthesis of proteins. Genes are responsible for transfer of traits from parents to the progeny.
The sequence of nucleotide on a DNA strand determines the coding for various proteins. From a few hundred DNA bases to more than 2 million bases, genes range in size. Every human contains two copies of same gene, one from each parent.
Protein-coding genes make up only around 1% of DNA; the remaining 99% is non-coding genes. There are no protein-making instructions in non-coding part of DNA.
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23 What kind of change-chemical or physical-accompa-
nies each of the following?
(a) The conversion of two elements to a compound
(b) The conversion of two compounds into a solution
(c) The combination of an element and a compound into
another compound
(d) The conversion of a compound to an element and
another compound
(e) The separation of a mixture into its components
A chemical change is one that leads to the formation of a new substance. It involves the rearrangement of the atoms in a substance to produce a new substance(s).
A physical change does not involve the rearrangement of atoms. It does not also lead to the formation of new substance. The changes are as follows;
The conversion of two elements to a compound - Chemical changeThe conversion of two compounds into a solution - physical change The combination of an element and a compound into another compound - chemical changeThe conversion of a compound to an element and another compound - chemical changeThe separation of a mixture into its components - physical changeLearn more about chemical change:https://brainly.com/question/23693316
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Hydrolysis of which covalent bonds in atp releases a considerable amount of energy?
There is a significant quantity of energy released during the hydrolysis of the covalent bonds in ATP.
Phosphate-phosphate bond hydrolysis occurs during the breakdown of an ATP molecule, which releases a significant amount of energy.
How is ATP hydrolysis defined?
Adenosine triphosphate (ATP) contains highly energetic phosphoanhydride bonds that, when broken, such as occurs in muscles, release chemical energy through a catabolic reaction process called ATP hydrolysis.Nitrogen-carbon double bonds, phosphate-phosphate bonds, carbon-hydrogen bonds, and hydrogen bonds are all found in an ATP molecule.
Phosphate-phosphate bond hydrolysis occurs during the breakdown of an ATP molecule, which releases a significant amount of energy.
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Calculate the mass defect of the oxygen nucleus 16 8o 816o . the mass of neutral 16 8o 816o is equal to 15.994914 atomic mass units
The mass defect of the oxygen nucleus is 16 8o 816o. the mass of neutral 16 8o 816o is equal to 15.994914 atomic mass units
8(1.008665)+8(1.007825)
=16.13192
16.13192-15.994914
=.13701 amu
The atomic nucleus is a small, dense region made up of protons and neutrons at the center of an atom, discovered by Ernest Rutherford in 1911, based on Geiger-Marsden's gold leaf experiment in 1909. After the discovery of the neutron in 1932, models of the nucleus composed of protons and neutrons were rapidly developed by Dmitri Ivanenko[1] and Werner Heisenberg. I was.
The cell nucleus carries genes, structures that control and regulate cell activity (such as growth and metabolism) and contain genetic information. Nucleoli are small bodies commonly found within the nucleus. The nucleoplasm is the gel-like matrix in which the core components are suspended.
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How many covalent bonds are predicted for an atom of cl? enter your answer in the provided box.
Seven covalent bonds are predicted for an atom of cl.
covalent bonds are formed by the mutual sharing of electrons from the atoms taking part in the bonding. Atoms participating in a covalent bond share their valence electrons in a way to complete their octet rule.
A covalent bond depends on the number of electrons that are present in the valence shell. The formation of CH4, H2O, and NH3, are types of covalent bonding.
A chlorine atom has seven electrons in its valance shell so it can form seven covalent bonds.
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3-hydroxybutanal can exist in equilibrium as a cyclic hemiacetal.true /false
It is false that 3-hydroxybutanal can exist in equilibrium as a cyclic hemiacetal.
Hemiacetal is produced when one molecule of aldehyde and one molecule of alcohol react.
3-hydroxybutanal (see the structure in the picture below) has both carbonyl and hydroxyl group, so it can, theoretically, undergo an intramolecular reaction to form a cyclic hemiacetal in aquatic solution.
Stability of cyclic hemiacetals depends on the size of the ring. Five or six membered rings are generally favored.
If 3-hydroxybutanal form a cyclic hemiacetal, it will have four membered ring, so it will be very unstable. It cannot exist in aquatic solution, while 4-hydroxybutanal can (see the picture below).
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If you had equal masses of each of the following substances, which would occupy the greatest volume?
Cocoa butter occupies the greatest volume.
What is cocoa butter good for?
Vitamin E has several health advantages for the body, and cocoa butter is a good source of this vitamin. The health of your blood, brain, skin, and reproductive system are all supported by vitamin E. Due to its high fatty acid content, cocoa butter is an excellent choice as the main component of skin creams.
Cocoa butter is 9/0 it's close to ICL but cocoa butter is the smallest end this one will take off the most volume because it is divided by the smaller density.It is important not to overheat the Baker when drying the sodium chloride because by these comments won't be loss and Baker was properly heat.
Complete question -
If you had equal masses of each of the following substances, which would occupy the greatest volume?a. ice (d = 0.917 g/mL)d. cocoa butter (d = 0.910 g/mL)b. water (d = 0.997 g/mL)e. aluminum (d = 2.70 g/mL)c. beeswax (d = 0.960 g/mL)
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Fatty acids that have been chemically altered so that ____________ atoms are on opposite sides of a double bond are called ____________ fatty acids.
Fatty acids that have been chemically altered so that hydrogen atoms are on opposite sides of a double bond are called trans fatty acids.
What are fatty acids?
Fatty acids are the building blocks of fat found in both our food and our body. During digestion, the body transforms lipids into fatty acids so they may be absorbed into the bloodstream. Three fatty acid molecules are joined together to form a molecule called a triglyceride.
Saturated, monounsaturated, and polyunsaturated fatty acids are all present in dietary fats. Even while meals include all three forms of fatty acids, they are frequently grouped according to the prevalent type.
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What chemical reactions occur in a Nelson's cell?
Explanation:
The graphite anodes are suspended into the brine. During electrolysis, Cl ions are oxidized at the anode and chlorine gas goes out of the cell, while sodium ions are reduced at the mercury cathode forming sodium amalgam. ... Hydrogen gas is obtained as a by–product at the cathode.
Energy-requiring reactions can occur in biological systems because they can be coupled with reactions that are?
Energy-requiring reactions can occur in biological systems because they can be coupled with reactions that are exergonic reaction.
In chemical thermodynamics, an exergonic reaction is a chemical reaction where the conversion in the free energy is negative (there is a net allow to leave of free energy). This shows a unbidden reaction if the structure is closed and starting and final temperatures are the similar.
Formula of exergonic reaction :
∆G = Gproducts - Greactants
where
∆G = change in free energy
G-products = free energy of products
G-reactants = free energy of reactants
Now, it can understood that "Energy - requiring reactions can occur in biological systems because they can be coupled with reactions that are exergonic reactions."
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Propane, c3h8, is a common fuel used for cooking and home heating. what mass of o2 is consumed in the combustion of 1.00 g of propane?
3.63g of O2 is consumed in the combustion of 1.00 g of propane.
Propane, c3h8, is a common fuel used for cooking and home heating.
C3H8 + 502---> 3CO2 + 4H20.
The combustion equation must first be balanced as illustrated above. The law of constant proportions can then be used to deduce that for every 1 mol of C3H8, there will be 5 mol of O2.
Using significant figures,
1 mol C3H8 -------> 44 g
1 mol O2 ------> 32g x 5 = 160
= 160/ 44g
160g/44g= 40/11 = 3.63g.
= 3.63g of O2 is consumed in the combustion of 1.00 g of propane.
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The formula for potassium permanganate is K3MnO4. In this formula, how many potassium ions are present?
1
2
3
4
Answer:
the potassium permanganate formula is KMnO₄
Explanation:
Potassium permanganate, also known as permanganate of potash or Condy's crystals, is a chemical compound consisting of two ions: a potassium ion and a permanganate ion.
hope this help if it does help I'd be happy if you follow and give me the brainliest answer
The formula of potassium permagnet is KMnO₄, Therefore there is only one potassium ion is present in potassium permagnet.
What is ion ?An atom with a negative electrical charge is known as an ion. Generally, the charge of an electron is considered to be negative,this charge is equal to and equivalent to the charged of a proton, which is thought to be positive.
When an atom's number of protons and electrons is out of balance, ions are created. As a result, an atom that has acquired or lost one or more electrons and thus has a positive or negative charge is said to be an ion.
Potassium permanganate is made up of one potassium atom ( K ), one manganese atom ( Mn ), and four oxygen atoms, according to its chemical formula ( O ).
Therefore there is only one potassium ion is present in potassium permagnet.
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The density of benzene at 15 °c is 0. 8787 g/ml. Calculate the mass of 0. 1500 l of benzene at this temperature. Enter your answer in terms of grams, but do not include units in the blank.
Using benzene density, the mass of benzene is 131.805 grams.
We need to know about the density to solve this problem. Density is a unit that measures how dense an object is. Density can be measured by dividing mass by volume. It can be written as
ρ = m / V
where ρ is density, m is mass and V is volume
From the question above, we know that
ρ = 0.8787 g/mL
V = 0.15 L = 150 mL
By substituting the following parameters, we get
ρ = m / V
0.8787 = m / 150
m = 0.8787 . 150
m = 131.805 grams
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What word or two-word phrase best describes the shape of the formaldehyde ( ch2o ) molecule?
Trigonal planar two-word phrase best describes the shape of the formaldehyde ( ch2o ) molecule
In formaldehyde carbon has four valence electrons, so it tends to make four bonds in covalent compounds. oxygen has six valence electrons, but as it tends to accept two, it tends to make two bonds in covalent compounds. hydrogen is almost always going to make only one bond, given that it only has one valence electron. 4+2+6=12 valence electron . in formaldehyde molecule carbon is on middle and double with oxygen am=nd single bond with 1 hydrogen and single bond with 1 hydrogen this make shape of formaldehyde called trigonal planar.
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A buffer solution is composed of 9.00 mol of acid and 4.75 mol of the conjugate base. if the pa of the acid is 2.40 , what is the ph of the buffer?
The pH of buffer solution is 2.1225
We know that
pH = [tex]pK_a[/tex] + [tex]log_1_0 \frac{[A]^{-} }{[HA]}[/tex]
In this question
[tex]pK_a[/tex] = 2.40
[tex][A]^{-}[/tex] = 4.75 mol
[HA] = 9 mol
Therefore putting values in formula
pH = 2.40 + [tex]log_1_0\frac{4.75}{9}[/tex]
pH = 2.40 + [tex]log_1_0[/tex] 0.52
pH = 2.40 - 0.283
pH = 2.1225
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If each oxygen atom represents 0.050 mol, how many molecules of dichlorine monoxide were present before the decomposition?
0.6 moles molecules of dichlorine monoxide were present before the decomposition.
Balanced chemical equation for reaction of gaseous dichlorine monoxide decomposes to chlorine and oxygen gases:
2Cl₂O → 2Cl₂ + O₂
n(O) = 12 × 0.050 mol
n(O) = 0.6 mol; number of oxygen atoms
n(O) : n(O₂); ratio of oxygen atoms to oxygen molecules (see the picture below)
n(O₂) = 0.6 ÷ 2
n(O₂) = 0.3 mol; amount of oxygen molecules
n(O₂) : n(Cl₂O) = 1 : 2; from balanced equation
n(Cl₂O) = 2 × 0.3 mol
n(Cl₂O) = 0.6 mol; amount of dichlorine monoxide
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Restate how a satellite stays in orbit with your own words, as if you were trying to explain the process to a younger friend or sibling
Satellite stays in orbit because of two factors velocity and gravitational pull of Earth.
A rocket fired from the ground with enough power to leave our atmosphere is used to put satellites into orbit.The satellite is dropped into orbit once the rocket arrives at the predetermined location.A satellite can stay in orbit for hundreds of years if it maintains its initial speed once it separates from the launch vehicle.A satellite keeps its orbit in place by balancing the gravitational pull of Earth with its velocity, which is the speed required to move in a straight line. In order to withstand the stronger gravitational attraction, a satellite must circle at a faster pace as it gets closer to the Earth.In short, they hold their place by locking into speeds that are quick enough to overcome gravity's pull downward.Therefore, Satellite stays in orbit.
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if an atom of carbon gains or loses a proton, what is it called?
Answer:
Carbon can not gain or lose protons because it has 4 electrons.
Explanation:
When a cell is placed in a solution with a very low solute concentration, water diffuses into the cell. such a solution is called a(n) _________ solution.
When a cell is placed in a solution with a very low solute concentration, water diffuses into the cell. such a solution is called a hypotonic solution. Subtract the solute's mass from the total volume of the solution. Divide the figures you found for mass and volume to find the concentration of your solution.
The overall solute concentration of a solution is described by its osmolarity. A solution with a low osmolarity has more water molecules than solute particles; a solution with a high osmolarity contains fewer water molecules than solute particles. Solute concentration is defined as the amount of solutes and particles dissolved in a solution.
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Which reaction best illustrates the behavior of the weak base h2po4- in aqueous solution?
The reaction best illustrates the behavior of the weak base h₂po₄- in an solution is:H₂PO₄ (aq) + H₂O (l) ↔ H₃PO₄ (aq) + OH- (aq)
What is a weak base?
A weak base is a base that, upon dissolution in water, doesn't dissociate completely, therefore the resulting aqueous solution contains only a small proportion of hydroxide ions and the concerned basic radical and a large proportion of undissociated molecules of the base.
Contents 1 pH, Kb, and Kw 2 Percentage protonated 3 A typical pH problem.
Examples of Weak Bases.
Ammonia (NH₃) Ammonia could also be a chemical compound with the formula NH ₃. it is a weak base which exists as a colour less gas under standard conditions for ...
2 Trimethylamine (N (CH₃) ₃)₃ Pyridine
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What states of matter do halogens exist in at room temperature?
At room temperature, the halogens show all the states of matter.
Halogens are the elements of the periodic table that belong to group number 17 and are non-metals. Fluorine and chlorine are gaseous at room temperature, bromine exists as liquid, whereas iodine and astatine are solid in nature. The halogens are highly electronegative and reactive in nature.
States of matter are the physical form in which a substance can exist. There are three states of matter: solid, liquid and gas. Fluorine and chlorine have weak forces of attraction between their molecules at room temperature, hence gaseous. Bromine has little stronger intermolecular force that prevents its evaporation and hence a liquid. The molecular weight of higher halogens is large with strong forces molecular forces and hence are solids.
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Calculate the energy (a) in ev and (b) in joules of the third energy level (n= 3) ofa hydrogen atom.
The energy (a) in EV and (b) in joules of the third energy level (n= 3) of the hydrogen atom.
-1.51 eV
-2.42 x 10^-19 J
In physics, energy is a quantitative property that is transferred to a body or physical system and can be perceived in the performance of work or in the form of heat and light. Energy is Conserved - The law of conservation of energy states that energy can be transformed into form, but cannot be created or destroyed.
The energy price cap, introduced in 2019 by market regulator Ofgem, sets the maximum amount (known as the “unit price”) that utilities can charge per kWh of gas and electricity. There is no right or wrong answer to choosing between a fixed power plan and a variable power plan. Which energy rate is best for your home depends on your assessment of future energy prices and your willingness to take risks. Compare energy suppliers to find the perfect match.
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This country has the most tornadoes in the world every year.
Canada
O United States
O Mexico
O England
Answer:
it's the United states
Explanation:
because It has alot of tornadoes
What are the effects on the bodies of water? use terms algal bloom, dead zone and hypotoxic
Water pollution is defined as the mixing of water with unwanted substances and that makes water unsafe.
Water pollution includes runoff of excess fertilizers,
herbicides, and insecticides from agricultural lands
and residential areas; oil, grease, and toxic chemicals
from urban runoff and energy production; and
sediment from improperly managed construction sites,
crop and forest lands, and eroding stream banks.
Polluted waters have high BOD which affects aquatic biodiversity.
Hpotoxic substances such as lead, arsenic, and fluoride cause many problems to aquatic animals and humans. Water contaminated with Arsenic results in diseases such as arsenicosis. Fluoride had been reported to cause depression in DNA and RNA synthesis in cultured cells, significant reductions in DNA and RNA levels, and conditions including aging, cancer, and arteriosclerosis are associated with DNA damage and its disrepair. Lead causes problems related to the central nervous system. Children and pregnant women are most at risk. Routine applications of fertilizers and pesticides for agriculture and uncontrolled runoff in water bodies. Adds nitrogen and phosphorus to water. It adds nitrogen and phosphorus to water causing eutrophication and algal blooms.
Therefore, all these activities make our water bodies a death zone for the marine ecosystem as well as humans.
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0.10 mol of naoh is added to 0.30 mol of weak acid hx in a total volume of 1.00 l. the ph of the resultant solution is 8.65. what is ka for hx?
Ka for HX is 1.12×10⁻⁹.
Balanced chemical equation for the reaction of sodium hydroxide (NaOH) with weak acid (HX):
NaOH + HX ⇄ NaX + H2O
n(NaOH) = 0.10 mol; amount of sodium hydroxide
V = 1.00 L; volume of the solution
c(HX) = (0.3 mol - 0.1 mol) / 1.00 L
c(HX) = 0.2 M; concentration of a weak acid
c(NaX) = 0.1 M; concentration of a salt
pH = 8.65
Henderson–Hasselbalch equation: pH = pKa + log(cs/ck).
8.65 = pKa + log(0.1 M / 0.2 M)
8.65 = pKa - 0.30
pKa = 8.95
Ka = 10∧-8.95
Ka = 1.12×10⁻⁹; the acid dissociation constant
Buffer is a solution that can resist pH change upon the addition of an acidic or basic components and it is able to neutralize small amounts of added acid or base, pH of the solution is relatively stable.
This buffer is example of weak acid (HX) and its conjugate base (X⁻).
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Name the phase change that occurs when a diamond film forms on a surface from gaseous carbon atoms in a vacuum?
Deposition, when a diamond film forms on a surface from gaseous carbon atoms in a vacuum, a gas changes directly into a solid.
What is deposition?Depositions typically take place in attorneys' offices rather than in courtrooms. A court reporter will record the entire deposition word-for-word while the lawyers interrogate the witness, or deponent, about details of the lawsuit and other events.
The reporter is present throughout the session and will create a transcript at a later time. A deposition could also be videotaped. This is typically done when the deponent is so very ill and may not be well enough for trial, or whether the deponent will be out of town or unavailable during trial.
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