Answer:
Carbon dioxide is held together by weak intermolecular forces (only London dispersion LD) and is a non-polar molecule. Because of this weak attraction, it exists as a gas. Water on the other hand is polar (dipole forces DP), and has a stronger hydrogen bond existing within it (in addition to LD). This makes it attract itself more than say carbon dioxide molecules, so it commonly exists as a liquid. Finally, salt like water is polar, and has ionic bonds that are even stronger than a hydrogen bond. This makes salt have a great attraction to itself, sticking together as a solid because its molecules cant easily be broken up.
Explanation:
These are the strongest intermolecular forces ranked from strongest to weakest.
1. Network Covalent
2. Ionic
3. Hydrogen Bonding
4. Dipole Dipole
5. London Dispersion
When an object is pushed by a force and moves in the direction of the force, work is done on the object. The amount of work equals the force times the distance (W = Fd). A small particle is pushed by a force of 2.6 × 10-4 newtons over a distance of 3.7 × 10-3 meters. How much work was done on the particle? Express the answer to the correct number of significant figures and in proper scientific notation. The force did × 10 newton-meters of work on the particle.
Explanation:
[tex]workdone = force \times distance \\ W = (2.6 \times {10}^{ - 4} ) \times (3.7 \times {10}^{ - 3} ) \\ W = 9.62 \times {10}^{ - 7} \: joules[/tex]
The formula W = Fd, where W is the amount of work done, F is the force, and d is the distance, is used to determine how much work is done on a particle when it is pushed by a force. The force and distance in this issue are 2.6 10-4 newtons and 3.7 10-3 metres, respectively.
What is the way to calculate the work done ?We add the force and distance together to determine the work done: 9.62 10-7 newton-meters are equal to W = 2.6 10-4 newtons x 3.7 10-3 metres. The response must be presented using the appropriate scientific notation and significant numbers.
The solution should include three significant figures, just like the numbers in the problem, which have three. Therefore, 9.62 10-7 newton-meters is the correct answer.
This response uses appropriate scientific language.notation because the exponent is a negative power of 10 and the coefficient ranges from 1 to 10. In conclusion, the particle underwent work from the force of 9.62 10-7 newton-meters. This response uses the appropriate scientific notation and the correct number of significant digits.
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Three categories of factors that cause illness or injury are shown here. Match each example on the right to its correct match on the
left.
A baby is born with an abnormal number of chromosomes.
Angela was badly injured in a car accident after her air bag
exploded.
Alex forgot to get a flu shot and missed two weeks of school
with the flu. Answer choices pathogenic agents, genes , environmental factors
Answer:
Alex forgot to get a flu shot and missed two weeks of school
6. The redox reaction that occurs during the operation of a battery is best described as
1) non-spontaneous and occurring in a chemical (voltaic) cell
2) spontaneous and occurring in a chemical (voltaic) cell
3) non-spontaneous and occurring in an electrolytic cell
4) spontaneous and occurring in an electrolytic cell
Answer:
1
Explanation:
The redox reaction that occurs during the operation of a battery is best describes as non-spontaneous and occurring in a chemical (voltaic) cell.
What is a redox reaction?Redox reactions are those reactions in which oxidation or reduction reaction occurs. In these reactions, losing of an electron occur.
An example is formation of hydrogen fluoride.
Thus, the correct option is (1) non-spontaneous and occurring in a chemical (voltaic) cell.
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Question
Which of the following best explains the age of oceanic crust and ocean-floor features?
A. Seafloor spreading
B. Continental drift
C. Subduction
D.crystallization
The answer option which best explains the age of oceanic crust and ocean-floor features is: A. Seafloor spreading.
Earth crust refers to the outermost layer (thin shell) which makes up the Earth such as igneous, metamorphic, and sedimentary rocks.
Generally, the two (2) main types of Earth crust include:
Continental crust.Oceanic crust.An oceanic crust has a thickness ranging from 5 kilometers to 10 kilometers and it comprises denser rocks such as gabbro, diabase, and basalt.
Seafloor spreading can be defined as a process which involves the formation of new oceanic crust due to volcanic activity and an upwelling of magma at mid-ocean ridges, as well as a subsequent outward movement from the ridge.
Basically, the theory of seafloor spreading can be used to explain in details how a new oceanic crust is created or formed at mid-ocean ridges.
Hence, seafloor spreading best explains the age of oceanic crust and ocean-floor features.
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Why were scientists unsure about the last common ancestor between apes and humans?
Answer:
Scientists were unsure about the last common ancestor between apes and humans because fossils are so scarce, researchers do not know what the last common ancestors of living apes and humans looked like or where they originated.
Explanation:
what are the products in a chemical reaction?
Answer:
it's c trust me
Explanation:
c cause it's c
Answer:
d
Explanation:
i dont know
makes the most sense to me
Palladium-100 has a half-life of 4 days. If you started with 20g of Palladium-100, how much would remain after 8 days?
A. 0g
B. 2.5g
C. 10g
D. 5g
Answer:
the answer is i think it's b
Explanation:
An elastic cord can be stretched to its elastic limit by a load of 2N.If a 35cm length of the cord is extended 0.6cm by a force of 0.5N,what will be the length of the cord when the stretching force is 2.5N
Explanation:
[tex]from \: hookes \: law \\ F = k.e \\ but \: e = 0.6 \: cm \\ 2 = k \times 0.6 \\ k = 3.33 \\ when \:F \: is \: 2.5 \\ 2.5 = 3.33 \times e {}^{.} \\ {e}^{. } = 0.75 \: cm \\ new \: length = 35 - {e}^{.} \\ = 35 - 0.75 \\ = 34.25 \: cm[/tex]
PLZ HELP!!!!!! IN YOUR OWN WORDS PLZ! :D
Imagine your cell phone rings. Describe how the sound gets transmitted from your phone to your ear, and then, from your ear to your brain. In your response, be sure to mention the type of wave that a sound wave is, the medium the sound is transmitted through before it gets to your ear, and what happens in your ear once the sound reaches it.
Answer:
String a piece of twine between the cups. Use a long piece of string to help the sound travel farther. Tie a knot in the end of the string to keep it in the cup. Decorate the cups if desired. One person can hold the phone up to their ear and the other person can talk into the other cup. Keep the string tight or the sound waves won’t travel.
Explanation:
The pH of a solution is 2.55. What is the [H3O+]?
Answer:
[H₃O⁺] ≈ 0.00282 M
General Formulas and Concepts:
Acid/Base Equilibria
Bronsted Acid/Bronsted Base
pH Formula: pH = -log[H₃O⁺]
[H₃O⁺] Formula: [tex]\displaystyle [H_3O^+] = 10^{-pH}[/tex]
Explanation:
Step 1: Define
pH = 2.55 (Acidic)
Step 2: Solve
Substitute in pH [Molar Concentration Formula]: [tex]\displaystyle [H_3O^+] = 10^{-2.55}[/tex]Evaluate exponent: [tex]\displaystyle [H_3O^+] = 0.002818[/tex]Step 3: Check
Follow sig fig rules and round. We are given 3 sig figs.
0.002818 M ≈ 0.00282 M
help pls it's about cells
why are so many products made from plastic ?
Explanation:
Plastic takes time to degrade which means it has great longevity. Plastic does not break as easily as glass or other materials. It lasts long and offers great service. Plastic storage containers offer greater flexibility than any other packaging materials.
The Soil conservation method in which mountain slope is cut into step is..
Answer:
Terracing.
Explanation:
Soil formation occurs as a result of the the decay or the remains of plants and animals which are used up.
Weathering can be defined as the physical and chemical breakdown of rock into smaller pieces called sediment. Weathering can be classified into two categories namely;
I. Physical weathering : it is the process of breaking rocks into pieces without affecting its chemical composition e.g temperature, abrasion and frost action.
II. Chemical weathering : it is the process of breaking rocks into pieces by chemical action which leads to changes in its chemical composition e.g carbonation, hydration, plant acid and oxidation.
Soil conservation can be defined as the use of various techniques so as to prevent the loss of the top most later of the soil and protecting it from degradation. Thus, the fertility of the soil is maintained.
The soil conservation method in which mountain slope is cut into step is terracing.
Answer:
Terracing
Explanation:
The Soil conservation method in which mountain slope is cut into step is Terracing.
How much of a 10 M solution is needed to make 1 liter of a 1 M solution
Answer:
0.1 L
Explanation:
M₁ × V₁ = M₂ × V₂
10M × V₁ = 1M × 1L
V₁ = 0.1 L
I hope this helps :)
The molar dilution can be used to estimate the molarity or the volume. 0.1 L of 10 M solution is required to make 1 M of solution.
What is the dilution factor?A dilution factor of the molar concentration is used to calculate the molar concentration or the volume needed to make the diluted solution from the stock.
Given,
M₁ = 10 M
V₁ = ?
M₂ = 1 M
V₂ = 1 L
The volume is calculated as:
M₁ V₁ = M₂ V₂
10 V = 1 × 1
V = 1 ÷ 10
= 0.1 L
Therefore, 0.1 L of the 10 M solution is needed.
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How much energy does a photon of frequency 6 x 10^12 Hz have?
A. 2.21 x 19^-42 J
B. 3.98 x 10^-21 J
C. 1.988 x 10^-25 J
D. 1.10 x 10^-46 J
Answer:
B.3.98x10^-21 JExplanation:
#cArryonLeArning
what is freezing point non-examples?
for the oxidation of iron to form iron(iii)oxide
4Fe(s)+3O2(g)=2Fe2O3(s) deltaS^o=-549.73J×K^-1 at 298K
the enthalpy of formation of Fe2O3(s) is -824.2 kj×mol^-1. what is the standard change in gibbs free energy for this reaction at 298K? Delta G^o=delta H^o-T delta S^o
Answer:
only god knows the answer
The Gibbs free energy is given by the change in enthalpy, temperature, and change in entropy. The standard change in Gibbs free energy for oxidation of iron is –1484.6 kJ.
What is Gibbs free energy?Gibbs free energy is the energy present in a thermodynamic system that is used by the reactant to form a product. It is given as,
Δ G° = Δ H° -T ΔS°
The oxidation reaction of iron is given as,
4Fe(s) + 3O₂(g) → 2Fe₂O₃(s)
Given,
ΔS° = –549.73 J∙K⁻¹
T = 298 K
Δ H° = –824.2 kJ∙mol⁻¹
Substituting values above the Gibbs free energy is calculated as:
Δ G° = Δ H° -T ΔS°
= –824.2 kJ∙mol⁻¹ - 298 K ( –549.73 J∙K⁻¹)
= -1484580.46 J
The units of joules are converted into kilojoules and the standard change in Gibbs free energy will be –1484.6 kJ.
Therefore, –1484.6 kJ is the Gibbs free energy.
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The temperature of a gas is decreased. What effect does this
have on the speed of the particles?
o The particles speed up.
o The particles slow down.
o The particles are destroyed.
The temperature has no effect on the speed of the
particles.
Explanation:
The temperature has no effect on the speed of the
particles.
(g) How does the colour of a star help to find its age?
The oxidation of an unsaturated fatty acid leads to the production of fewer ATPs than a saturated fatty acid with the same number of carbons because ____ A) the oxidation of the fatty acid stops when it reaches the double bond B) unsaturated fatty acids cannot be metabolized C) the double bond results in the bypassing of the first oxidation step of the pathway, thereby eliminating one FADH2 product
Answer:
C) the double bond results in the bypassing of the first oxidation step of the pathway, thereby eliminating one FADH2 product
Explanation:
The beta oxidation of fatty acids is the process by which long chain saturated and unsaturated fatty acids are oxidized to the two-carbon product, acetylCoA.
The beta oxudation of fatty acids occurs in four steps after which the chain length is shortened by 2 with cleavage of an acetylCoA molecule.
The first step involves the oxidation of the fatty acid with introduction of a double bond between C-2 and C-3 of the long carbon chain. This reaction produces FADH2 which donates its electrons to electron carriers in the electron transport chain tomproduce 1.5 moles of ATP. This is the case with saturated fatty acids.
However, in unsaturated fatty acids (which are less reduced than saturated fatty acids) where there is already a double bond innthe molecule, the double bond results in the bypassing of the first oxidation step of the pathway, thereby eliminating one FADH2 product.
This causes a reduction In the number of ATP produced by unsaturated fatty acids when compared to saturated fatty acids.
help please, thank you:)
Answer:
1.67 × 10⁻¹⁰m is the answer.
Explanation:
Given,
4 × 10⁻⁷m thick
2400 atoms thick
therefore 1 atom,
Diameter = 4 × 10⁻⁷/2400
d = 4000 × 10⁻¹⁰/2400
d = 1.67 × 10⁻¹⁰m
∴ diameter of 1 gold atom (3 significant figures) = 1.67 × 10⁻¹⁰m
Please help!!! Best answer will get brainliest
electronic configurations and charges of the ions
in lithium fluoride?
Answer:
Explanation:
The electronic configuration of a lithium atom is 2.1 and that of a fluorine atom is 2.7
an atom of lithium donates an electron to an atom of fluorine to form an ionic compound. The transfer of the electron gives the lithium ion a net charge of +1, and the fluorine ion a net charge of -1.
what is synthetic polymers
Answer:
Synthetic polymers are human-made polymers, and they are commonly found in a variety of consumer products. Various main chains and side chains are used to make different synthetic organic polymers.
Be + Cl₃N -----> Cl₂ + Be₃N₂ *
Answer:
3Be + 2NCl₃ ⟶ 3Cl₂ + Be₃N₂
-TheUnknownScientist
What is the molarity of a 0.4 liter solution containing 1.6 moles of NaCl?
Answer:
4 M
Explanation:
Molarity refers to the molar concentration of a substance (solution). It can be calculated by using the formula below:
Molarity (M) = number of moles (n) ÷ volume (V)
According to the information provided in this question;
V = 0.4 liter
n = 1.6 moles
Molarity = n/V
Molarity = 1.6/0.4
Molarity = 4 M
what is Co³⁺ and Co¹⁺
Answer:
https://clever.com/
Explanation:
Why can’t sound vibrations travel in outer space? *
Your answer
Answer:
Sound does not travel at all in space. The vacuum of outer space has essentially zero air. Because sound is just vibrating air, space has no air to vibrate and therefore no sound. ... Radio is a form of electromagnetic radiation just like light and can therefore travel through the vacuum of space just fine
How many total atoms in 3CuSO4
Answer:
18
Explanation:
Element Symbol no of Atoms
Copper Cu 3
Sulfur S 3
Oxygen O 12
18 = total
To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, there are total 18 electrons in the given compound.
What is atom?Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.
In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron.
Element Symbol no of Atoms
Copper Cu 3
Sulfur S 3
Oxygen O 12
S, there are total 18 electrons in the given compound.
Therefore, there are total 18 electrons in the given compound.
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PLEASE PLEASE HELP
What is the pOH of a solution with an OH- ion concentration of
6.0E-4?
Answer:
3.22
Explanation:
The pOH is defined as:
pOH = - log [OH⁻]
From the problem, we have [OH⁻] = 6.0 x 10⁻⁴.
Thus, we introduce the concentration in the equation to calculate the pOH:
pOH = - log [OH⁻] = -log (6.0 x 10⁻⁴) = 3.22