precipitate the reactants in achemical reaction. II. TRUE or FALSE. Write TRUE if the statement is correct and FALSE if it is not.
21. Sugar is very soluble in a nonpolar liquid like mineral oil.
22. Acetone has a higher vapour pressure than ethanol.
23. In a water molecule, the hydrogen is partially positive, while the oxygen is partially negative.
24. The stability of the DNA structure arises from the H-bonding of base pairs.
25. Components of electronic devices include nonpolar substanceslike transient suppression diodes, metalloids and semimetals.
26. Vapour pressure rises as the strength of IMFA decreases.
27. Boiling point, melting point, viscosity ang surface tension increases as the strength of IMFA decreases.
28. lon-dipole interaction exists between ions and a nonpolar compound. 29. Hydrogen bonding occurs with polar molecules bonded with highly- electronegative atoms.
30. Water is a polar molecule, thus it is miscible with nonpolarmolecule like oil.
Answers
Answer:
FalseTrueTrueFalseFalseTrueFalseTrueTrueTrueExplanation:
Sucrose is a polar carbohydrate. The negative and positive regions on the polar sucrose molecules are attracted by the polar water molecules, causing sucrose to dissolve in water. A polar substance like sucrose cannot be dissolved by a nonpolar substance like mineral oil.Because hydrogen bonding gives ethanol a stronger intermolecular force than acetone, ethanol has a higher boiling point than acetone. Because vapor pressure is proportional to boiling point in an indirect manner, acetone has a higher vapor pressure at 25° than ethanol.The Ostart text, O, end text atom hogs electrons and keeps them away from the Hstart text, H, end text atoms because oxygen is more electronegative (electron-hungry). This results in a partial negative charge on the oxygen end of the water molecule and a partial positive charge on the hydrogen end.The stability of DNA double-helical structures is aided by aromatic stacking and hydrogen bonding between nucleobases, which are two of the most important interactions. Hydrogen bonds are noncovalent interactions that are weak, yet the enormous number of hydrogen bonds between complementary base pairs in a DNA double helix combine to endow the structure with a lot of stability.'Boron, silicon, germanium, arsenic, antimony, and tellurium are metalloids. These elements resemble metals but do not conduct electricity as effectively as metals, making them semiconductors.The strength of a liquid's intermolecular forces determines its vapor pressure. The vapor pressure of a liquid with weak intermolecular interactions is higher. The vapor pressure of a liquid with higher intermolecular interactions is lower than that of a liquid with less intermolecular forces.The stronger the IMFs, the lower the vapor pressure of the substance and the higher the boiling point.When an ion interacts with a non-polar molecule, it causes an ion-induced dipole force. The charge of the ion produces a distortion of the electron cloud in the non-polar molecule, generating a brief partial charge, similar to a dipole-induced dipole force.water is a polar solvent and it will dissolve salts and other polar molecules, but not non-polar molecules like oil.Related Questions
Explain how oxygen and carbon dioxide move with breathing.
Answers
Answer/Explanation:
With oxygen, it is what you breathe in so obviously, it is going to move around into your body. But with carbon dioxide, it is what you breathe out. When you breathe in, your body takes in the oxygen and the releases the carbon dioxide. Carbon dioxide is what plants actually consume, while they release oxygen.
I hope this helps!
-No one
Use the bond energy to calculate an approximate value of ΔH for the following reaction. Which is the more stable form of FNO2?
Answers
The Lewis structures in which there are no formal charges is the most stable. Hence, structure (b) is the more stable form of FNO2.
Lewis structureThe question is incomplete but I will try to answer you as much as I can. Now the equation is missing hence we can't numerically caculate the enthalpy chnage of the reaction from bond energies. However, we can do this using the formula; Σbond energy of reactants - bond energy of products.
Concerning the Lewis structures of FNO2, the most stable structure is structure (b) as shown in the image attached where the atoms have no formal charges.
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Looking at the figure, the overall (SiO4) molecule, which forms the common mineral quartz, has a tetrahedral shape. It is probably a:
non-polar molecule
polar molecule
Answers
non-polar molecule because the chemical formula is in a tetrahedral form(O4) and the (Si) is in the centre. I hope this will help you
When 20.4g of sodium metal are mixed with chlorine gas, are 52.0 g of sodium chloride
produced? Explain (use calculations to prove your answer.
.ves or no
-with amounts shown)
Answers
Answer: True
Explanation:
[tex]\mathrm{The\ balanced \ chemical \ equation\ is\ :}\\$2 \mathrm{Na}{(s)}+\mathrm{Cl}_{2}(g) \rightarrow 2 \mathrm{NaCl}(s)[/tex]
For Na
[tex]\\$Given mass $=20.4 \mathrm{~g}$ \ \ Molecular mass $=23 \mathrm{~g}\ \ $Number of moles $=\frac{\text { Given mass }}{\text { Molecular mass }}$$$\begin{aligned}&=\frac{20.4}{23} \\&=0.887 \text { moles }\end{aligned}$$Stoichiometric ratio of $\mathrm{Na}$ is same as that of $\mathrm{NaCl}$ i.e., $1: 1$.$\therefore$ Moles of $\mathrm{NaCl}=0.887$ motes[/tex]
For NaCl
[tex]$$\\\begin{aligned}\text { Molecular mass } &=23+35.5 \\&=58.5 \mathrm{~g}\end{aligned}$$[/tex]
[tex]\begin{aligned}\\& $\therefore$ Mass of $\mathrm{NaCl}$ produced will be=\text { No.of moles } \times \text { Molecular mass } \\&=0.887 \times 58.5 \\&=51.9 \\&\simeq 52 \mathrm{~g} \quad\end{aligned}$$[/tex]
Therefore, it is true that when 20.4g of sodium metal are mixed with chlorine gas, 52.0 g of sodium chloride is produced
Explanation:
The answer: True
I explained the answer to your question in the submitted photo
Amory turns the light on in her house. Looking at the lights, she begins to wonder how the charges are moving through the bulb. Which statement best describes how the charges move through the bulb ?
Answers
The statement 'when charges pass through the bulb, light is produced' best describes how the charges move through the bulb.
What is an electrical charge?An electrical charge is a type of positive or negative charge of the particles that move in a conductor.
At the atomic level, protons are positively charged particles, electrons are negative, and neutrons do not have a charge.
The electrical charges depend on the charge's initial time, the final time, and the net outward current.
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Fe(NO3)3
Percent composition
Answers
Answer:
Fe: 23.1%
N: 17.4%
O: 59.5%
Explanation:
You take the grams that each weigh on the periodic table and add it all up. Afterward you create fractions of each over the whole. (Example: Fe/Fe+N+O) then you divide and turn that decimal into a percentage.
I would really appreciate someone could answer this question for mee! I will mark brainliest aswell. :)
Which statement is true about the total mass of the reactants during a chemical change?
A)It is destroyed during chemical reaction
B)It is less than the total mass of the products.
C)It is equal to the total mass of the products.
D)It is greater than the total mass of the products.
Answers
Answer:
c
Explanation:
mass is like matter it cant be created or destroyed so mass stays the same.
Answer:
C) It is equal to the total mass of the products.
Explanation:
The law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products.
- profparis
Kinetic friction is the frictional force needed to start an object at rest into
motion.
O A. True
O B. False
Answers
Answer:false you are welcome
Explanation:
Answer: False I hope this helpful please mark me brainlist
Explanation:
Kinetic friction is the friction acting upon a moving object. It would be the frictional force against you if you pulled a box across a table.Static friction is the frictional force needed to overcome to get an object at rest into motion.
The text above says that many acids taste sour, but also states that oranges and tomatoes contain acid. Suggest at least one reason why these fruits don't taste sour
Answers
Fruits don't taste sour because of less hydrogen ions and less acid.
Why these fruits taste sour?Scientists discovered that pulp from sour fruit contains more hydrogen ions, which leads sour taste while on the other hand, the sweeter fruit-like pineapples has pulp that contains fewer hydrogen ions, leading to less acidic and sweeter in taste.
So we can conclude that fruits don't taste sour because of less hydrogen ions and less acid.
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Why is the electron configuration for copper 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 10 4 s 1 instead
of 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 9 4 s 2 ?
A The 4 s orbital has higher energy than the 3 d orbital.
B Electrons occupy orbitals of the highest energy levels first.
C A filled sublevel is more stable than a half-filled sublevel.
Answers
please help!!!
Sulfur (S) has 16 protons and 16 neutrons. How many electron shells does an element of sulfur have?
3
4
2
1
Answers
Answer:
Sulfur (S) has 3 shells.
Explanation:
The first shell can have up to 2 electrons. The second and third shells have up to 8 electrons as well. This makes the maximum of each shell to be 2, 10, and 18. Sulfur has 16 electrons so it has more than the second shell but less than the third shell. So, it will have 3 shells with a valence of 2 since it is missing 2 electrons to create a full shell.
In Fig C, which pair of electrons is the lone pair?
H:P:H
Fig C
H
O Top
O Left
Bottom
O Right
Answers
Answer:
bottom right top left fig
determine the degree of ionization at pH 2.0
Answers
Answer:
answer in the picture above
1) A solution is prepared with 0.55 M HNO2 and 0.75 M KNO2. Fill in the ICE Table with the appropriate values
2) The Ka for this solution of HNO2 is 6.8x10^-4. Based on the ICE table, set up the expression for Ka.
3) Based on your ICE table, determine the pH of the buffer solution
Answers
Based on the calculations through the ICE table, the pH of the buffer solution is equal to 3.30.
Given the following data:
Concentration of [tex]HNO_2[/tex] = 0.55 M.Concentration of [tex]KNO_2[/tex] = 0.75 M.Rate constant = [tex]6.8 \times 10^{-4}[/tex]How to determine the pH of the buffer solution.First of all, we would write the properly balanced chemical equation for this chemical reaction:
[tex]HNO_2(aq)\rightleftharpoons H^{2+} (aq)+ KNO_2^{-}(aq)[/tex]
Initial cond. 0.55M 0 0.75M
[tex]\Delta C[/tex] -x x x
At equib. 0.55M - x 0 + x 0.75M + x
From the ICE table, the Ka for this chemical reaction is given by:
[tex]K_{a}=\frac{[H^+][NO_2^+]}{HNO_2} \\\\H^+ = K_{a}\frac{[HNO_2]}{[NO_2^+]} \\\\H^+ = 6.8 \times 10^{-4} \times \frac{0.55}{0.75} \\\\H^+ = 6.8 \times 10^{-4} \times 0.733\\\\H^+ = 4.98 \times 10^{-4} \;M[/tex]
Now, we can calculate the pH of the buffer solution:
[tex]pH=-log[H^+]\\\\pH=-log[4.98 \times 10^{-4}]\\\\pH=-(-3.30)[/tex]
pH = 3.30.
Alternatively, you can calculate the pH of this buffer solution by applying Henderson-Hasselbalch equation:
[tex]pH =pka+ log_{10} \frac{A^-}{HA}[/tex]
Where:
HA is acetic acid.[tex]A^-[/tex] is acetate ion.Read more on concentration here: https://brainly.com/question/3006391
Which type of resources cannot be replenished by natural processes in a reasonably short period of time?
A: nuclear waste
B: natural resources
C: nonrenewable resources
D: renewable resources
Answers
Amphetamine (C9H13N) is a weak base with a pKb of 4.2.
Calculate the pH of a solution containing an amphetamine concentration of 215 mg/L .
Express your answer to two decimal places.
Answers
Weak base: [OH⁻] = √Kb.C
pKb = 4.2
[tex]\tt Kb=10^{-4.2}[/tex]
c = concentration
MM Amphetamine (C9H13N) = 135.21 g/mol
c = 215 mg/L = (0.215 g : 135,21 g/mol) / L = 0.00159 mol/L = 1.59 x 10⁻³ mol/L
[tex]\tt [OH^-]=\sqrt{10^{-4.2}\times 1.59\times 10^{-3}}=3.17\times 10^{-4}[/tex]
pOH = 4 - log 3.17
pH = 14 - (4 - log 3.17)
pH = 10 + log 3.17 = 10.50
If you start with 10 carbon and 3 Hydrogen, what will you end with?
Answers
Answer:
The simplest Organic compounds are made up of only Carbon and Hydrogen atoms only. Compounds of Carbon and Hydrogen only are called Hydrocarbons.
Explanation:
New materials can be constructed molecule-by-molecule and atom-by-atom using ______________ in their design.
Answers
An element is made up of only one type of atom.
Which kind of wave is formed when a transverse wave and a longitudinal wave combine?
A a surface wave
B an electromagnetic wave
C a sound wave
D a radio wave
Answers
The kind of wave that is formed when a transverse wave and a longitudinal wave combine is surface wave.
What is surface wave?A surface wave is a mechanical type of wave that propagates along the boundary between two different media.
How surface waves formWhen a mechanical wave travels at the interface between two media, a transverse wave and a longitudinal wave can combine to form a surface wave.
An example can be seen in ocean waves.
Thus, the kind of wave that is formed when a transverse wave and a longitudinal wave combine is surface wave.
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Referring to your benzene model, explain why there is no directionality for a substituent group bonded directly to a benzene ring.
Answers
The benzene molecule is flat and planar. As a result of this planarity, the substituent is also in the plane of molecule and do not show any directionality.
What is the benzene moleculeThe benzene molecule is a flat and planar molecule owing to the fact that all the bond lengths and bond angles in the molecules are the same. This results from resonance in the molecule.
Hence, owing to the planarity of the molecule, the substituent is also in the plane of molecule and do not show any directionality.
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What are the characteristics of nonvascular plants? (select all that apply) A . They don’t rely on roots to receive water.
B .They have xylem vessels and phloem vessels
C . They are able to push water and nutrients to each part of the plant.
D . They are found in moist environments.
Answers
Answer:
D . They are found in moist environments.
Explanation:
Nonvascular plants do not have a xylem or phloem, roots, stems, or leaves. Because these plants lack water-conducting tissues, they fail to achieve the structural complexity and size of most vascular plants and have evolved in habitats which allow their survival and reproduction.
The plant body that is most obvious in non-vascular plants are the the gametophyte generation. The gametophte gemeration is haploid.
The non-vascular plants grow in moist environments. It is due to lack of vascular tissue that requires to maintain close contact with water to prevent desiccation. Nonvascular plants are plants that do not have any special internal pipelines or channels to carry water and nutrients. Instead, nonvascular plants absorb water and minerals directly through their leaflike scales. Nonvascular plants are usually found growing close to the ground in damp, moist places. Non-vascular plants thrive in damp conditions since they don't need to rely on roots to acquire enough water.
As a chemical energy is converted into heat energy during a reaction the total energy of the system
Answers
When a chemical energy is converted to hear during a chemical reaction, the total energy of the system remain constant.
Law of conservation of Energy?Law of conservation of energy state that the today energy interacting with bodies in a isolated system remain constant
the Law of Conservation state that the total energy in a system remain unchanged, and that oftentimes a chemical reaction will absorb or release energy in the form of heat, light, or both.
Therefore, The total energy of the system remain constant.
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Which statement describes a seismic wave during an earthquake?
A.
The wave changes directions as it is pulled by gravity.
B.
The wave changes speed as it moves through different materials.
C.
The wave loses energy to the oceans when it comes in contact with the water.
D.
The wave reflects off the surrounding rocks as it moves through the outer core.
Answers
Based on their nature of waves, seismic waves changes speed as it moves through different materials.
What are seismic waves?Seismic waves are the waves that are produced and travel through the earth crust during an earthquake.
Seismic waves are often described as elastic waves which is the energy caused by a sudden breaking of rock within the earth's crust.
Seismic waves can travel at different speeds through different types of rock, bouncing back or changing direction.
Therefore, the correct statement which describes a seismic wave during an earthquake is that the wave changes speed as it moves through different materials.
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Are two atoms of the same element identical?
Answers
Answer:
No. They typically are not identical.
Explanation:
Atom's electrons can be in different states
Answer:
NO
Explanation:
Atoms are like dna and cells they all have a different job even if they are the same element
Identifying My Interests
List five activities that you enjoy
Answers
Answer:
BIKE riding, Watching yt, Hanging with friends, Food,Dogs
An ion has 14 protons and a charge of “+2”. How many electrons does it have?
Answers
Answer : 12
It has a +2
Take it out from 14
Which statement is true about precipitation in biomes around the world.
Question 6 options:
The taiga has more precipitation than the deciduous forest biome.
Deciduous forest biome is second in precipitation to the tropical rainforests.
Coniferous forest biome has more precipitation to the Deciduous forest biome.
The desert biome has more precipitation to the Deciduous forest biome.
Answers
Answer:
i want to say it's
Explanation:
(B) but i don't know but did you ever figure out the anwser?
Answer:
Coniferous forest biome has more precipitation to the Deciduous forest biome.
Explanation:
At 4.5 atm of pressure, the solubility of a gas is 9.5 g/L.
How much gas, in grams, will dissolve in 1 L if the pres.
sure is reduced by 3.5 atm?
Answers
For a gas at 4.5 atm of pressure, the solubility of a gas is 9.5 g/L.
How much gas, in grams, is mathematically given as
s2=8.3782grams
What is the amount of gas in grams?Generally, the equation for the is mathematically given as
Si /S2 √P1/√P2
Therefore
[tex]s2=9.5*\sqrt{3.5}/\sqrt{4.5}[/tex]
s2=8.3782g
In conclusion. The solubility is
s2=8.3782g
Read more about Solubility
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please help, I'm giving brainliest. Explain the term'wear acid'.
Answers
Weak acids are acids that don't completely dissociate in solution. In other words, a weak acid is any acid that is not a strong acid. The strength of a weak acid depends on how much it dissociates: the more it dissociates, the stronger the acid.
how many moles of glucose do I have if I have 26 grams of glucose
Answers
Answer:
0.1443194637888042 moles
Explanation:
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