Answer:
Explanation:
Equation for the reaction ;
AgNO3 + HCl → AgCl + HNO3
Since AgNO3 is taken in excess, the limiting reactant/agent here is HCl.
Concentration (molarity) of HCl = 0.110 M
Amount of HCl in 1 litre (1000 mL) solution = 0.110 mol
Amount of HCl in 50 mL = (0.110 x 50)/1000 = 0.0055 mol
As per the reaction equation, the consumption of HCl and the formation of AgCl are in the molar ratio 1 : 1.
Moles of AgCl formed = moles of HCl used = 0.0055
Molar mass of AgCl = 107.8 + 35.5 = 143.3 g/mol
Which of the following has the lowest entropy?
A. H₂O(g)
B. H₂O(s)
C. O₂(g)
D. H₂O(/)
Answer:
im pretty sure its B
Explanation:
What is the molar mass of a compound if 0.0401 moles weigh 21.6 grams ?
The molar mass of a compound of 0.0401 moles weighing 21.6 grams is 538.65 g.
The molar mass of a substance is the mass in grams of one mole of the compound. In a substance, the amount of entities present e.g. atoms, molecules, ions, is defined as a mole.
∴M = m / n
M = molar mass
m = mass of a substance (in grams) = 21.6 grams
n = number of moles of a substance = 0.0401 moles
∴ 0.0401 moles of a compound have a mass of 21.6 g
∴ 1 mole of the compound will have a mass of 21.6 / 0.0401
= 538.65 g (molar mass of compound)
So, the molar mass of a compound of 0.0401 moles weighing 21.6 grams
is 538.65 g.
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PLEASE HELP!! WILL GIVE BRAINLIEST!!
A certain reaction is endothermic in the forward direction and has a greater number of molecules on the product side. Which set of conditions should be used to maximize the yield of the products? (5 points)
Group of answer choices
Decrease the temperature and decrease the pressure.
Increase the temperature and decrease the pressure.
Decrease the temperature and increase the pressure.
Increase the temperature and increase the pressure.
Answer:Decrease the temperature and increase the pressure
what is the IUPAC name of the following substance?
The IUPAC name of the following substance is 3-methylpent-2-ene.
What is IUPAC NAME?Th IUPAC nomenclature of an organic chemistry is defined as a method of naming of the organic chemical compounds which is recommended by the International Union of Pure and Applied Chemistry. It was published in the Nomenclature of Organic Chemistry.
Rules:Firstly, we check the chain having large number of carbon atoms. Since, the substance having longest chain contain five chain. Prefix is named by seeing the functional group. Since, methyl group is attached to the third carbon atom. Therefore, 3-methyl is suffix. This compound contains double bond. Therefore, ene is used as suffixThus, we concluded that the IUPAC name of the following substance is 3-methylpent-2-ene.
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For each salt, determine how much will remain undissolved if 500 g is mixed into a liter of pure water at 40 ∘c. One significant figure is sufficient in each answer.
The amount of the salts left undissolved at 40 °C is Lead II nitrate = 300 g and Potassium chloride = 100 g and Potassium dichromate = 0 g.
What is the undissolved salt mass?We are aware that the mass of a solute that may dissolve at a specific temperature is related to the solubility. The absorption is temperature dependant, it must be said.
Briefing:Let's consider how much of each salt would absorb at 40 °C;
Pb(NO3)₂ : 0.0g
KCl : 100.0g
K₂Cr₂O₇ : 300.0g
For any salt, we may calculate the amount that can be dissolved at 40 °C by dissolving 500 g and subtracting its solubility at that temperature.
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The complete question is-
For each salt, determine how much will remain undissolved if 500 g is mixed into a liter of pure water at 40 °C. One significant figure is sufficient in each answer.
Pb(NO3)₂:
KCI:
K₂Cr₂O7:
list three ways in which the properties of metallic solids and ionic solids are different.
Balance the chemical equation: Fe + Cl₂ → FeCla.
Answer:
2Fe + Cl₂ → 2FeCl
Explanation:
Answer:
2Fe + Cl(sub2) ---> 2FeCl
Explanation:
Before balancing, there is 1 Fe and 2 Cl on the left side of the equation. In order to get 2 Cl on the right side, we have to multiply (FeCl) by 2. This causes there to be 2 Fe on the right side also, so now you go back and multiply 2 by the Fe on the left. Leaving you with 2 Fe and 2 Cl on the left, and 2 Fe and 2 Cl on the right.
A transcriptional repressor, which is at a concentration in the bacterial cell of 10 nM, binds to
its target DNA sequence with a KD of 0.1 nM in the absence of its ligand, and with a KD of 1 μM in
the presence of its ligand. It also binds to non-target DNA sequences with a KD of 10 μM
regardless of the presence or absence of its ligand. The transcriptional repressor’s target DNA
sequence occurs once in the genome and there are 20,000 non-target DNA sites in the genome.
What is the specificity of the transcriptional repressor for its target site over non-target sites in
the absence of its ligand?
What is the specificity of the transcriptional repressor for its target site over non-target sites in
the presence of its ligand?
The specificity of the transcriptional repressor for its target site over non-target sites in the absence of its ligand is very low. The specificity in the presence of the ligand is very high.
What is transcriptional repressor?Transcriptional repressor is defined as a sequence-specific DNA binding proteins work by enticing corepressor complexes, which are made up of a variety of proteins, including histone modifying enzymes. It binds the DNA and repel RNA polymerase.
In the absence of its ligand, the specificity of the transcriptional repressor for its target site over non-target sites is relatively low. In the presence of the ligand, the specificity is quite high because ligand is used as a binding agent and if binding agent is not present the molecule does not bind easily.
Thus, the specificity of the transcriptional repressor for its target site over non-target sites in the absence of its ligand is very low. The specificity in the presence of the ligand is very high.
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3. Write the names for each of the following structures.
The IUPAC names of the given organic compounds are as follows:
methanolpropan-2-ol or 2-propanolbutan-2-ol or 2-butanolhexanolheptanolWhat are the IUPAC names of the given organic compounds?The IUPAC names of the given organic compounds are derived from three parts to their name:
the root hydrocarbon - this is the longest continuous straight carbon-to-carbon chain whose name is derived from the parent alkanethe suffix - which is the main substituent ground serving as the functional group in the compoundthe prefix - other substituents in the compound that are not the functional group.The given compounds have a principal functional group of -OH which is the alkanol functional group.
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Which unit cell is a simple cubic unit cell?
Answer:
his unit cell only contains one atom. Its packing efficiency is about 52%. To packing efficiency, we multiply eight corners by one-eighth (for only one-eighth of the atom is part of each unit cell), giving us one atom. An example of a Simple Cubic unit cell is Polonium.
Explanation:
A description of a unit cell in which a simple cubic unit cell is found in polonium.
How polonium is a simple cubic unit cellA simple cubic unit cell simply refers to that substance which consist of 8 different atoms in a cubic unit. When we look carefully into polonium, it usually, frequently and most of the time crystalizes in cubic unit. It is on this premise that we say that polonium is identified as a simple cubic unit cell?
So therefore, we can now confirm and also deduce from the explanation above that we a simple cubic unit cell has in itself eight corners of atoms.
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Is it possible to get a homozygous dominant offspring with brown eyes if you
cross and Heterozygous Dad with brown eyes, and a Homozygous recessive
with blue eyed Mom?
Use the empty Punnett square to determine if this is possible. Explain your
answer and copy and paste your completed Punnett square into the
discussion along with your answer.
Yes, because green eye alleles are more common than blue eye alleles; therefore, a parent with blue eyes can only have two blue eye alleles.
What is a brief definition of alleles?The term "allele" is used to refer to a gene's alternate form or variants. For each autosomal gene, one allele is inherited from each parent, and we often group the alleles into categories. Usually, we refer to them as normal, wild-type, aberrant, or mutant alleles.
An allele or a gene?A gene's changeable form is called an allele. There are some genes that come in different forms yet all have the same genomic location on a chromosome. Humans are considered diploid organisms because each genetic locus in them has two alleles, one from each parent..
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What is the medium of the wave being detected by the seismograph
A. paper
B. Air
C. ink
D. rock
Answer:
D.
Explanation:
How many hydrogen atoms are in 25.5g of c2h2?
The hydrogen atoms are in 25.5g of C₂H₂ is 11.79 gm. The chemical substance known as acetylene has the formula C₂H₂ . One acetylene molecule contains two hydrogen atoms. The alkyne series' first stable component is acetylene.
What is acetylene ?The chemical compound acetylene has the formula C2H2 and the chemical formula HC ≡ CH. It is the most basic alkyne and a hydrocarbon. This colorless gas is frequently utilized as a fuel and a component of chemical compounds. Since it is unstable in its pure state, a solution is typically used.
Compressed acetylene and compressed oxygen are frequently utilized to power torches used for a variety of operations. Due to its strong flammability, instability, and particular storage and transportation needs, acetylene poses special risks. Acetylene is extremely brittle.
Thus, The hydrogen atoms are in 25.5g of C₂H₂ is 11.79 gm.
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During aerobic respiration, h2o is formed. Where does the oxygen atom for the formation of the water come from?.
The oxygen atom for the formation of the water comes from molecular oxygen.
The non-metallic chemical element oxygen is found in Group 16 of the periodic table, generally known as the oxygen group (O). All living creatures require the colorless, tasteless, and odorless gas known as oxygen. When plants use it as a source of carbon and release the oxygen back into the environment, plants utilise the carbon dioxide that animals have taken up and converted it into.
Oxygen may react with almost every other element to form compounds in addition to reactions that remove elements from their combinations with one another. Combustions are the name for these reactions, which are typically accompanied by the creation of heat and light. The most important component is water.
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How does the weight of an object affect the amount of force it would need to move
If 9.8 g of sulfuric acid is dissolved in an excess quantity of water, it will yield _______ moles of hydrogen ion ( H+) and _______ mole of sulphate ions (SO4 -2).
If 9.8 g of sulfuric acid is dissolved in an excess quantity of water, it will yield 0.2-mole moles of hydrogen ions ( H+) and 0.1 moles mole of sulfate ions (SO4 -2).
Sulfuric acid or sulphuric acid, known in antiquity as oil of vitriol, is a mineral acid composed of the factors sulfur, oxygen, and hydrogen, with the molecular system H₂SO₄. it's miles a drab, odorless and viscous liquid that is miscible with water.
Calculation:-
The molar mass of sulphuric acid = 98
mass = 9.8 gram
moles = mass/ molar mass
= 9.8/98
= 0.1 moles
moles of H+ = 2 × 0.2 = 0.2 mole
moles of sulfate ions (SO4 -2). = 0.1 moles.
Sulfuric acid is used in many industries. it's used to supply other chemical compounds, explosives, and glue; to refine petroleum; to remedy metal, and in lead-primarily based vehicle batteries.
Sulfuric acid reacts violently with alcohol and water to launch warmth. It reacts with most metals, mainly while diluted with water, to shape flammable hydrogen gasoline, which may additionally create an explosion danger.
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Help me please!!
Means a lot
How to identify covalent and ionic compounds?
Ionic compounds are (usually) formed when a metal reacts with nonmetal (or a polyatomic ion). Covalent compounds are formed when two nonmetals react with each other11 dinitrogen trioxide - N2O3 - covalent , both oxygen and nitrogen are nonmetals.
13 barium phosphate - Ba₃ (PO4)₂ - ionic , bond is created by giving or taking electrons.
14 lithium acetate - Li⁺ CH3COO⁻ - ionic
15 phosphorus trifluoride - PF₃ - covalent, formed by the sharing of electrons between phosphorus and fluorine atoms.
16 vanadium (V) oxide - V2O5 - ionic
17 aluminum hydroxide - Al(OH)3 - covalent, according to fajan rule
18 zinc sulfide - ZnS - ionic , its composed of Zn²⁺ and S²⁻ ions
19 silicon tetrafluoride - SiF4 - covalent, their bonds are arranged in tetrahedral shape
20 nickel(11) phosphate - Ni₃(PO4)₂ - ionic, as nickel is metal and phosphate is polyatomic ion
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1.) A Compound has 38.7% carbon 9.6% hydrogen 51.6% oxygen
What is its empirical formula ?
The molar mass of the compound is 62g/mol what is its molecular formula?
2.) a compound has 94.1% oxygen and 5.9% hydrogen
what is its empirical formula ?
its molar mass is 34 g/mol
Empirical formula is the simplest whole number ration of elements in a compound. Molecular formula is n times the empirical formula, where n is integers 1,2,... The empirical formula is CH[tex]_2[/tex]O.
What is Empirical formula?
Empirical formula gives the proportion of the element that is present in a compound. It does not give information about the actual number or the arrangements of the atoms.
Number of gram atoms in compound and divide by smallest Number of gram atoms in compound
C=(38.7%)÷12=3.2
H=(9.6%)÷1=9.6
O=( 51.6%)÷16=3.2
The atomic ratio is 3.2:9.6:3.2
Whole number C:H:O is1:2:1
Empirical formula corresponding to this whole number is CH[tex]_2[/tex]O.
Thus the empirical formula is CH[tex]_2[/tex]O.
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Please SHOW WORK/steps for all problems, answers already there
1. The solution of the problem is volume = 9.14 mL.
Use this formula, P1V1/T1 = P2V2/T2
Here,
P1 = initial pressure, given = 746 mm Hg
V1 = initial volume, given = 10.1 mL
T1 = initial temperature, given = 23° C = 296 K
P2 = final pressure, given = 760 mm Hg
V2 = final volume
T2 = final temperature, given = 0° C = 273 K
Put these values in formula, P1V1/T1 = P2V2/T2
V2 = P1V1T2/P2T1
V2 = 9.14 mL
Hence,
2. The solution of the problem, put the values in formula,
P1V1/T1 = P2V2/T2
V2 = P1V1T2/P2T1
3.The solution of the problem, put the values in formula,
P1V1/T1 = P2V2/T2
V2 = P1V1T2/P2T1
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Part A
A sample of ideal gas is in a sealed container. The pressure of the gas is 735 torr, and
the temperature is 29 °C. If the temperature changes to 62 °C with no change in
volume or amount of gas, what is the new pressure, P2, of the gas inside the container?
Express your answer with the appropriate units.
View Available Hint(s)
HÅ
P₂ = Value
Submit
O
Units
?
Pressure of the gas inside the container is 662.59 torr.
What is ideal gas law?The ideal gas law (PV = nRT) connects the macroscopic characteristics of ideal gases. An ideal gas is one in which the particles are both non-repellent and non-attractive to one another (have no volume).
The general law of ideal gas can be applied here: PV is equal to nRT, where P is the gas pressure in atm.
V is the number of moles of the gas in a mole, and n is the volume of the gas in L. R is the universal gas constant. T is the temperature(Kelvin) of the gas.
If P and T are different values and n and V are constants, then
(P₁T₂) = (P₂T₁).
P₁ = 735 torr, T₁ = 29°C + 273 = 302 K,
P₂ = ??? torr, T₂ = 62°C + 273 = 335 K.
∴ P₂ = (P₁T₂)/(P₁) = (735 torr)(302 K)/(335 K) = 662.59 torr.
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Consider the reaction below.
HCl (aq) + NaOH (aq) --> H2O (l) + NaCl (aq) Δ = -55.8 kJ
Calculate the final temperature (in oC) when 25.0 mL of 5.42 M HCl are mixed with 25.0 mL of 4.32 M NaOH, if each solution starts at 25.0 oC.
Ignore the heat absorbed by the calorimeter, and assume the solution has the same specific heat capacity and density as pure water.
The final temperature (in °C) when 25.0 mL of 5.42 M HCl are mixed with 25.0 mL of 4.32 M NaOH, if each solution starts at 25.0 °C is 28 °C.
The reaction is given as :
HCl + NaOH -----> H₂O + NaCl
moles of HCl = 5.42 × 0.025
= 0.135 mol
moles of NaOH = 4.32 × 0.025
= 0.108 mol
moles of reaction = 0.108 mol
specific heat capacity is given as:
Q = mc ΔT
Q = 0.108 × (- 55.8) = - 6.026 kJ = 602.6 J
total volume = 25 ml + 25 ml = 50 ml
mass = density × volume
= 1.04 × 50 = 52 g
now, Q = mc ΔT
602.6 = 52 × 3.93 × ( T - 25)
The final temperature T = 28 °C
Thus, The final temperature (in °C) when 25.0 mL of 5.42 M HCl are mixed with 25.0 mL of 4.32 M NaOH, if each solution starts at 25.0 °C is 28 °C.
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In a _____, one line represents one pair of electrons being shared.
In a covalent bond, one line represents one pair of electrons being shared.
What are covalent compounds?Covalent compounds are compounds formed as a result of sharing of electrons between the atoms that make up the compound.
In other words, electrons are shared among atoms that make up covalent compounds unlike in ionic compounds where some atoms donate electrons while some atoms accept electrons.
Thus, a line in the structure of covalent compounds represents a bond formed as a result of sharing a pair of electrons between two atoms.
For example, the line between C and H in C-H represents a bond formed between the two atoms as a result of sharing a pair of electrons between them. Whereas, the line between Na and Cl atoms in Na-Cl represents a bond formed as a result of Na donating an electron to Cl.
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*30 Points* What is the electronegativity difference of the compound HNO?
Hydrogen Electronegativity Level: 2.20
Nitrogen Electronegativity Level: 3.04
Oxygen Electronegativity Level: 3.44
Answer:
Hydrogen Electronegativity Level: 2.20 is the correct answer
What is physical weathering?
the transformation of rocks into some other type of materials
the breaking of rock into smaller pieces from nonchemical processes
the building up of rock that has been brought from other places
the movement of rock from one place to another
Answer:
B
Explanation:
I took the test
Answer:
the breaking of rock into smaller pieces from nonchemical processes
Explanation:
Basically, the process that breaks rocks apart without changing their chemical composition.
Hydrogen peroxide decomposes to water and oxygen at constant pressure by the following reaction:
2 H2O2(l) → 2 H2O(l) + O2(g) ΔH = -196 kJ
Calculate the value of q (kJ) in this exothermic reaction when 5.00 g of hydrogen peroxide decomposes at constant pressure.
The value of q (kJ) in the exothermic reaction when 5.00 g of hydrogen peroxide decomposes at constant pressure is 14.40kJ.
What is an exothermic reaction?
Exothermic reaction is the reaction in which the standard enthalpy change of the reaction is negative that is there is release of heat energy.
The q (kJ) in the exothermic reaction can be calculated as,
2 H2O2(l) ------> 2 H2O(l) + O2(g) ΔH = -196 kJ
So, 196kJ of heat (q) will be released for every 2 moles of hydrogen peroxide. To calculate the heat released for 5.00 g of hydrogen peroxide,
Number of moles of hydrogen peroxide = 5.00g / 34.016 g/mol
n = 0.147
q = -196 x 0.147 / 2 = 14.40kJ.
Therefore, 14.40kJ of heat is released by 5.00 g of hydroxide peroxide when it decomposes in the exothermic reaction.
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Why does a uranium glass glows under UV light ?
Answer:
The uranium fluoresces under UV light
Explanation:
The uranium fluoresces under UV light because the UV excites the electrons above the ground state and gives off photons as the electrons transition back to the ground state,” Naomi Marks, a research scientist at the Lawrence Livermore National Laboratory in California, tells Collectors Weekly.
Answer:
Uranium oxide.
Explanation:
Uranium glass does indeed glow under a blacklight. This is because of the uranium oxide that is used to produce the glass. When exposed to ultraviolet light, the uranium oxide will emit a greenish-yellow light.
Hypochlorous acid is a weak acid. Write an equation showing how HCIO acts in solution; then
write the K, expression for HCIO.
Hypochlorous acid is a weak acid. Its equation is following:-
HClO ⇄ H⁺ + ClO⁻
K = [H⁺] [ClO⁻] / [HClO]
Weak Acids are the acids that do not completely dissociate into their constituent ions when dissolved in solutions.
When dissolved in water, an equilibrium is established between the concentration of the weak acid and its constituent ions.
The awareness of a substance is the quantity of solute present in a given amount of answer. Concentrations are typically expressed in phrases of molarity, defined as the wide variety of moles of solute in 1 L of answer.
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How do I go about solving this?
Answer:
A. 40.0%
Explanation: Divide 8/20=0.4 Move the decimal twice to the right BAM! you got 40%.
The nature of a volcanic eruption (i.e. how explosive) is determined largely by the _____ of the magma.
A) pressure
B) color
C) density
D) chemistry
E) temperature
Answer:
D
Explanation:
I'm not 100% sure on this but I am pretty confident that it's D or C I'm 98% sure it's D
What would the sunscreen look like if it absorbed all of the visible light that hits it
Sunscreen look like if it absorbed all of the visible light that hits it look like skin bright
A substances that help protect the skin from the sun harmful rays and sunscreen reflect and absorbed and scatter both ultraviolet radiation and provide protection against both type of radiation and sunscreen contain ingredient that help absorbed UV light and they sit on the surfaces of the skin and reflect away from the skin and sunscreen ingredient form a thin protective film that penetrate from the skin
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