Answer:
adding water to an anhydrous compound forms a hydrate.
Explanation:
The statement which correctly describes the relationship between a hydrate, water, and an anhydrous compound is adding water to an anhydrous compound forms a hydrate. The correct option is A.
What are anhydrous compounds?Anhydrous means without water, so the compounds that do not contain water are anhydrous compounds. Some examples are sodium sulfate, hydrogen fluoride, etc.
Hydrates are the compounds that contain water as the H2O molecules. These compounds lose their structure if water molecules are removed from the compound.
So, when water is added to the anhydrous molecules, it converts into hydrates. An example is sodium sulfate decahydrate.
Thus, the correct option is A. Adding water to an anhydrous compound forms a hydrate.
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A reaction that is spontaneous at low temperature can become non spontaneous at high temperature if δh is\
Answer:
Reaction
Explanation:
A reaction that is spontaneous at low temperature
For 480. 0 mL m L of pure water, calculate the initial pH p H and the final pH p H after adding 2. 0×10−2 mol m o l of HCl H C l
Given that the volume of the pure water is 480 mL and the mole of HCl added to the water is 2×10¯² mole. Therefore, the Initial and final pH of the water are:
1. The initial pH of the pure water is 7
2. The final pH of the water is 1.38
What is pH ?This is simply a measure of the acidity / alkalinity of a solution.
The pH measures the hydrogen ion concentration while the pOH measures the hydroxide ion concentration
pH scaleThe pH scale is a scale that gives an understanding of the variation of the acidity / alkalinity of a solution.
The scale ranges from 0 to 14 indicating:
0 to 6 indicates acid 7 indicates neutral (pure water) 8 to 14 indicate basicHow to determine the molarity Volume = 480 mL = 480 / 1000 = 0.48 L Mole of HCl = 2×10¯² mole Molarity =?Molarity = mole / Volume
Molarity = 2×10¯² / 0.48
Molarity = 4.17×10¯² M
Dissociation equationHCl(aq) —> H⁺(aq) + Cl¯(aq)
From the balanced equation above,
1 mole of HCl contains 1 mole of H⁺
Therefore,
4.17×10¯² M HCl will also contain 4.17×10¯² M H⁺
How to determine the pH Hydrogen ion concentration [H⁺] = 4.17×10¯² MpH =?pH = –Log H⁺
pH = –Log 4.17×10¯²
pH = 1.38
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Draw the alkyl bromide(s) you would use in a malonic ester synthesis of ethyl 2-methylbutanoate
The structure of the alkyl bromides used in a malonic ester synthesis of ethyl 2-methyl-4-pentenoate are as drawn in the attached image.
Ethyl 2-methyl-4-pentenoate by Malonic ester synthesis.The malonic ester synthesis is a chemical reaction characterized by the alkylation of diethyl malonate or a similar ester of malonic acid at the carbon alpha (directly adjacent) to both carbonyl groups, and subsequently converted to a substituted acetic acid.
Hence, it follows from the structure of Ethyl 2-methyl-4-pentenoate that the alkyl bromides used are Ethyl bromide and methyl bromide.
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Alkyl bromide is a compound that contains a halogen atom in alkane based structure. The structure of the alkyl bromides is attached in the image below.
What is Malonic ester synthesis?Malonic ester synthesis is the alkylation of an ester of malonic acid or diethyl malonate at alpha carbon and is converted to substituted acetic acid.
In malonic ester synthesis of ethyl 2-methyl butanoate, ethyl bromide and methyl bromide are the alkyl bromides used and their images are attached below.
Therefore, alkyl bromides used in the synthesis are ethyl bromide and methyl bromide.
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which element would be most likely to lose electrons in chemical bond
Solutions of monosodium phosphate and disodium phosphate are combined in equal volume to produce a buffer. Identify the combination that will produce the buffer with the highest buffer capacity
Answer: 0.1M NaH2PO4 & 0.1M Na2HPO4
Explanation:
You’re sitting at a car race and the cars sound differently when they approach as opposed to when they are moving away. Why might this be true? Explain in detail.
Answer:
I have no clue this qestion is kinda stumping but it a really good question it got me thinking but i don't know if there is a right answer
Explanation:
I don't know
What is the substance that is dissolved in a solution?
A)solvent
B)solute
C) mixture
D) electrolyte
Answer:
solute dissolves in a solution
Answer:
solvent
Explanation:
because solvent are liquid that disolves
Based on the graph what is the approximate half-life of the reaction shown below
A neutral cloth and a neutral rod are rubbed together. Electrons are transferred from the rod to the cloth. What will be the final charge on the cloth?
Answer: The net charge on the cloth with be negative.
Explanation:
Because electrons are being transferred from the neutral rod to the neutral rod to the neutral cloth, the cloth will become negative due to the excess electrons. (The rod will also become positively charged, but that’s beyond the scope of the question.)
When a neutral cloth and a neutral rod are rubbed together then the final charge on the cloth is negative.
What is transfer of charge from material ?Whenever electrons are transferred between objects, neutral matter becomes charged. For example, when atoms lose or gain electrons they become charged particles called ions. Three ways electrons can be transferred in a material that are conduction, friction, and polarization.
How does the charge transfer from rod to the cloth ?Rubbing a neutral rod with a neutral cloth also transfer charge from both the material. We know that a metal rod is a conductor of electricity whereas the cloth is an insulator that does not conduct electricity. When both the rod and cloth is rubbed, electrons are transferred due to friction on the material. Electrons are always negatively charged. As the rod and cloth is rubbed, the electrons flow from the rod to the cloth thereby making the rod as positively charged and the cloth as negatively charged.
Thus, when a neutral cloth and a neutral rod are rubbed together then the final charge on the cloth is negative.
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Complete the curved arrow mechanism for the reaction of 4-methylpentanenitrile and lialh4, followed by the addition of acid to give the major product
The curved arrow mechanism for the reaction as described is as represented in the attached image.
Nitrile reduction by LiAlH4Nitriles, upon reaction with LiAlH4 can be converted to 1° amines.
Opon occurrence of this reaction, the hydride nucleophile attacks the electrophilic carbon in the nitrile to form an imine anion. Once stabilized by a Lewis acid-base complexation the imine salt can accept a second hydride to form a dianion.
On this note, the nitrile reduction of 4-methyl pentanenitrile and lialh4, followed by the addition of acid to give the major product is as represented in the attached image.
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Why would you argue this is the best energy source to use?
Answer:
really its tought or we can say confusing
°__°
what are the advantages and diadvantages of preparing a standard solution?
Answer:
advantages:
. The error due to weighing the solute can be minimised by using concentrated stock solution that requires large quantities of solute. 2. We can prepare working standards of different concentrations by diluting the stock solution which is more efficient since consistency is maintained
3. Some of the concentrated solutions are more stable and are less likely to support microbial growth than working standards used in the experiments.
Which can be directly linked to a reduction in the surface area available for gas exchange in human lungs
Emphysema is directly linked to a reduction in the surface area available for gas exchange in the human lungs.
What is Emphysema?Emphysema is a lung disease that causes shortness of breath.
The air sacs are damaged in this disease.
The inner walls of the air sacs weaken and rupture, resulting in a larger number of smaller air spaces.
Smoking is the primary cause of Emphysema
Thus, Emphysema is directly linked to a reduction in the surface area available for gas exchange in the human lungs.
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On all aerosol cans you see a warning that tells you to keep the can
away from heat because of the danger of explosion. What is the
potential volume of the gas contained in a 500.0 mL can at 25°C if it
were heated to 54°C. In other words if the can could expand to allow
the gas to take up a greater volume, what would be the new volume of
the gas when heated as previously described?
Gas laws show the relationship between tempertaure, pressure, volume, volume and number of moles. The new volume of the gas is 549 mL.
What is Charles law?Charles law states that, the volume of a given mass of gas is directly proportional to its temperature at constant pressure .
Given that;
V1 = 500.0 mL
T1 = 25°C or 298 K
V2 = ?
T2 = 54°C + 273 = 327 K
Since;
V1/T1 = V2/T2
V1T2 = V2T1
V2 = V1T2/T1
V2= 500.0 mL * 327 K/298 K
V2 = 549 mL
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what is the barometric trend of the weather data?
Answer:
the change of atmospheric pressure during the last few (generally three) hours before a regular observation.
Explanation:
Even small changes in barometric pressure can greatly impact the weather. The Weather Trend directional arrow icon, included on many AcuRite weather station products, will show one of the following three barometric pressure trend directions, indicating potential future weather conditions.
What are two benefits of using tides for energy?Good explanation=Brainliest.
Answer:
Advantages of tidal energyRenewable.
Tidal energy is a renewable source of energy, which means the energy doesn’t deplete as it is used. …
Zero carbon emissions. In addition to being a renewable energy source, tidal power stations do not emit greenhouse gasses during electricity generation. … Predictable. … High power output.
Explanation:
Are all black holes the same size? Explain
Answer:
According to my search, the answer is this.
Black holes come in several different sizes which are defined by their mass. Small black holes are usually the result of a relatively short and violent collapse of a star.
Explanation:
It only has mass. The amount of matter that has fallen into the black hole determines its mass. The more mass/matter a singularity has the larger its event horizon. So, the greater the black hole's mass the larger it is.
Answer: Black holes come in several different sizes which are defined by their mass. Small black holes are usually the result of a relatively short and violent collapse of a star.
Explanation:
327 mL of 3.2 M HCl can be diluted to make mL of 2 M HCI.
Answer:
204,375 mL.
Explanation:
327 mL - 3.2 M
x mL - 2 M
x= (2 M x 327 mL) /3.2 M
x= 204,375 mL.
I need help please. Thanks
Answer:
Battery
Explanation:
The battery supplies the electricity needed for the circuit to work.
a system with 1 mole of an ideal gas changes its volume from 10 L to 1 L by isothermal compressoin. What is the change in entropy of the system
Answer:
ΔS=2.303 n Rlog(
V
1
V
2
)
=2.303×10×8.314log(
10
100
)=191.47 JK
−1
Thus ΔS=191.47JK
−1
Explanation:
what is not a molecule
Answer:
Single atoms of elements are not molecules.
Explanation:
A single oxygen, O, is not a molecule. When oxygen bonds to itself (e.g., O2, O3) or to another element (e.g., carbon dioxide or CO2), molecules are formed
Compare and contrastthe properties of the individual elements that combine to make salt with the compound salt
Answer:
I believe is the correct answer
Explanation:
NaCl made,2(NaCl)or2NaCl,Na2Cl,NaCl2 all represent compounds
0.05 moles of HCL are added to 2 L of H2O. What is the molarity of the solution?
Impossible to answer the question with the information provided.
1.60
0.025M
10.4
The molarity of the solution made by dissolving 0.05 mole of hydrogen chloride (HCl) in 2 L of water (H₂O) is 0.025 M
What is molarity?Molarity is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:
Molarity = mole / Volume
How to determine the molarity Mole of HCl = 0.05 mole Volume = 2 L Molarity =?Molarity = mole / Volume
Molarity = 0.05 / 2
Molarity = 0.025 M
Thus, the molarity of the solution is 0.025 M
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Which process can be used to power a home? solar thermal energy neither solar thermal energy nor solar electric energy both solar thermal energy and solar electric energy solar electric energyWhich process can be used to power a home? solar thermal energy neither solar thermal energy nor solar electric energy both solar thermal energy and solar electric energy solar electric energy
Answer:
solar electric energy
Explanation:
k12
Of the following acids, determine a. The strongest acid b. The acid that produces the lowest concentration of hydronium ions per mole of acid
Answer:
The bond strength of an acid generally depends on the size of the 'A' atom: the smaller the 'A' atom, the stronger the H-A bond. When going down a row in the Periodic Table (see figure below), the atoms get larger so the strength of the bonds get weaker, which means the acids get stronger.
Explanation:
The acid that is strongest of the following is HNO₃ and the acid that produces the lowest concentration of hydronium ions per mole of acid is HF.
What are weak and strong acids?Strong acids are completely dissociated into a solution.
Examples of strong acids are Hydrochloric acid, sulfuric acid, nitric acid, etc.
Weak acids are those that do not completely dissociate in a solution.
Examples are formic acid, acetic acid, nitrous acid, etc.
Thus, the acid that is strongest of the following is HNO₃ and the acid that produces the lowest concentration of hydronium ions per mole of acid is HF.
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Typical household bleach has a ph of 13. what is the h3o concentration in household bleach? round to the nearest hundredth. × 10n m n =
Typical household bleach has a value of pH of 13, so the concentration of H₃O⁺ in household bleach is 1 × 10⁻¹³ M.
What is pH?pH of any solution is defined as the negative logarithm of the concentration of H⁺ ion presnt in the solution.
pH = -log[H⁺]
From this equation we can calculate the concentration of H⁺ ion by removing logarithm as:
[H⁺] = [tex]10^{-pH}[/tex]
Given value of pH = 13
[H⁺] = 10⁻¹³ M
Hence, required concentration is 1 × 10⁻¹³ M.
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Answer:
1st blank is 1.00
2nd blank is -13
Explanation:
Which ion combines with ba2 to form a compound that is most soluble in water
Answer:
(2) OH- is the answer.
Explanation:
Hope this helps:)...if not then sorry for wasting your time and may God bless you:)
The ions that combine with Ba2 to form the compound most soluble in water is OH- ion.
What is barium?Barium is a chemical element with atomic number 58.
Barium reacts with the hydroxide ion to form barium hydroxide. It is also called baryta water.
The reaction is [tex]Ba^2^+ aq + 2OH^- \rightarrow Ba(OH)_2 (aq)[/tex]
Thus, the ions that combine with Ba2 to form the compound most soluble in water is OH- ion.
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_____is the rate of change of displacement
Answer:
Velocity
Explanation:
The rate of change of displacement is velocity.
Answer:
Velocity
Explanation:
The rate of change of displacement with time is called velocity.
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What factor would speed up a chemical reaction
Answer:
Adding Catalyst can Speed up a Chemical reaction
Answer: catalyst
Explanation:
a catalyst is a substance that helps speed up chemical reactions.
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If 15.0 mL of 12.0 M H3PO4 reacts with 100.0 mL of 3.50 M of Ba(OH)2 , which substances is the limiting reactant?
2 H3PO4 + 3 Ba(OH)2 -> 6 H2O + BA3 ( PO4 )2
Use the formula stated below
[tex]\boxed{\sf Molarity=\dfrac{Moles\:of\:solute}{Volume\:in\:L}}[/tex]
So
#H_3PO_4
No of moles[tex]\\ \tt\Rrightarrow n=0.015(12)=0.18moles[/tex]
#Ba(OH)_2
[tex]\\ \tt\Rrightarrow n=0.1(3.5)=0.35mol[/tex]
Barium hydroxide is moreHence H_3PO_4 is the limiting reagent
Answer:
hope it's helpful to you