Gravity does NOT * 10 points increase when the distance between two objects increases. increase when the distance between two objects decreases. increase when the mass of one object increases. increase when the mass of both objects increases.

Answer:

12000m & 12km

Explanation:

covert 20mins into seconds.

20 x 60= 1200seconds

distance = speed x time

distance = 10 x 1200

distance = 12000m

1km=1000m

12000/1000= 12km

hope that helps :)

The π bond in ethylene, H2C=CH2, results from the overlap of p atomic orbitals. Therefore, the correct answer is option 2.

A pi bond is created when two atomic orbitals overlap side by side. A pi bond is created when there are parallel electron cloud overlap between p orbitals present on carbon atoms that lie in the same plane. The overlapping of p atomic orbitals results in a bond referred to as a pi bond or π bond. Ethene (ethylene) is an organic molecule with the formula C2H4. The two carbon atoms are bonded together via a double bond, with each carbon atom forming a sigma bond with one of the two hydrogens and a π bond with the other carbon atom.

Therefore, the π bond in ethylene results from the overlap of p atomic orbitals. An sp hybrid orbital is produced by the mixing of one s and one p orbital, resulting in two sp hybrid orbitals. An sp2 hybrid orbital is produced by the mixing of one s and two p orbitals, resulting in three sp2 hybrid orbitals. An sp3 hybrid orbital is created by mixing one s and three p orbitals, resulting in four sp3 hybrid orbitals. Finally, s atomic orbitals cannot form a bond.

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Answer:

The reaction rate would decrease

Explanation:

What would happen to the rate of the forward reaction if the concentration of nitrogen were decreased? The reaction rate would decrease . What will happen to the rates of the forward and reverse reactions when a catalyst is added? Both forward and reverse rates increase.

Answer:

c

Explanation:

h

Answer:

1) Carrying capacity is the maximum number of individuals of a species that an environment can support.

2) Population - all the inhabitants of a particular town, area, or country.

3) An increase in population will inevitably create pressures leading to more deforestation, decreased biodiversity, and spikes in pollution and emissions, which will exacerbate climate change.

4) The three leading causes of population growth are births, deaths, and migration. Births and deaths are seen as natural causes of population change.

Answer:

The answer is C for sure!

Explanation:

In the picture we have the electrons given, so we have to determine the nucleons and protons.

Answer:6.42 ppm

Explanation:ppm = (g soluto/g soluzione) ×1000000

Acetylcholine is released from the synaptic terminus in response to an action potential arriving at the synaptic terminus.

acetylcholine is a neurotransmitter that is released from the synaptic terminus in response to an action potential arriving at the synaptic terminus. When an action potential reaches the synaptic terminus, it causes voltage-gated calcium channels to open. This allows calcium ions to enter the synaptic terminus, leading to an increase in calcium concentration inside the cell.

The increase in calcium concentration triggers the fusion of synaptic vesicles containing acetylcholine with the presynaptic membrane. This process is known as exocytosis. As a result, acetylcholine is released into the synaptic cleft, which is the small gap between the presynaptic and postsynaptic membranes.

Once released, acetylcholine can bind to receptors on the postsynaptic membrane of the target cell. This binding initiates a response in the target cell, which can include the generation of an action potential or the modulation of cellular processes.

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Acetylcholine is released from the synaptic terminus in response to an action potential arriving at the synaptic terminus. The correct answer is (d).

Acetylcholine (ACh) is a neurotransmitter in both the peripheral and central nervous systems. The release of acetylcholine is stimulated by an action potential, which causes a temporary influx of calcium ions (Ca2+) into the synaptic knob, resulting in the exocytosis of synaptic vesicles containing ACh, as shown below.

This causes the acetylcholine to be released from the synaptic terminus. An action potential arriving at the synaptic terminus stimulates the release of neurotransmitters. When an action potential reaches the axon terminal, it depolarizes the membrane and opens voltage-gated calcium channels.

Calcium ions flow into the presynaptic neuron through these channels, causing the synaptic vesicles to merge with the presynaptic membrane and release neurotransmitters into the synaptic cleft.

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Among the following given options Ba₂(NO₃)₂ has the highest boiling point.

The boiling point of a solvent increases due the addition of a solute in the solvent and it follows the formula:

ΔT = K × m × i

Where K represents the boiling point increasing constant (Depends of the solute), m is molality = molarity when solvent is water, and i is Van't Hoff factor.

This implies that the compound with the higher m × i will be the solution with the highest boiling point,

a. NaCl has i = 2 (NaCl dissociates in Na⁺ and Cl⁻ ions).

m × i = 0.15 × 2 = 0.3

b. CaCl₂; i = 3. (3 ions).

m × i = 0.10M × 3 = 0.3

c. Ba₂(NO₃)₂ dissolves in 5 ions. i = 5

m × i = 0.15 M × 5 = 0.75

d. NH₃ has i = 4:

m × i = 0.2M × 4 = 0.8

e. Al₂(NO)₃ : i = 5

m × i = 0.10 × 5 = 0.5

Hence, the m × i value of Ba₂(NO₃)₂ is highest so it has the highest melting point.

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The breakdown of a 22-carbon fatty acid through aerobic metabolism via beta-oxidation and the citric acid cycle provides a substantial amount of energy in the form of ATP, allowing cells to perform various vital functions.

The approximate energy yield through aerobic metabolism of a 22-carbon fatty acid involves a series of major reactions within the mitochondria of cells. The process is known as beta-oxidation, and it generates acetyl-CoA molecules that enter the citric acid cycle (also known as the Krebs cycle) to produce ATP.

First, the 22-carbon fatty acid undergoes a series of four reactions in the beta-oxidation pathway. Each cycle of beta-oxidation removes a two-carbon acetyl-CoA molecule from the fatty acid chain, generating one molecule of NADH and one molecule of FADH2 in the process. These high-energy electron carriers will later enter the electron transport chain to produce ATP.

After the beta-oxidation process, the resulting acetyl-CoA molecules enter the citric acid cycle. In this cycle, each acetyl-CoA molecule is oxidized, leading to the production of three molecules of NADH, one molecule of FADH2, and one molecule of GTP (which can be converted to ATP). These electron carriers (NADH and FADH2) will transfer their electrons to the electron transport chain for ATP synthesis.

Finally, the electron transport chain, located in the inner mitochondrial membrane, utilizes the high-energy electrons from NADH and FADH2 to pump protons across the membrane. This establishes an electrochemical gradient that drives ATP synthesis through oxidative phosphorylation. The exact number of ATP molecules generated depends on several factors, but on average, the complete oxidation of a 22-carbon fatty acid yields approximately 129 molecules of ATP.

Overall, the breakdown of a 22-carbon fatty acid through aerobic metabolism via beta-oxidation and the citric acid cycle provides a substantial amount of energy in the form of ATP, allowing cells to perform various vital functions.

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Answer:

chemical synthesis or chemical property

Explanation:

The answer is 3 times

Edit: I'm so sorry if this is incorrect!!!

Answer:

220.9g of water are required

Explanation:

The molar enthalpy of vaporization is defined as the heat released when 1 mole of water changes from liquid to gas.

For water, 1 mole releases 40.79kJ. To release 500kJ are necessaries:

500kJ * (1mol / 40.79kJ) = 12.26 moles are necessaries

To convert moles to grams we must use the molar mass (H2O = 18.02g/mol):

12.26 moles * (18.02g / 1 mol) =

Answer:

The correct option is;

Group 12

Explanation:

A metallic element that is shiny and silver colored that can exist in the +1 and +2 ionic states and  which forms a bright red compound with sulfur is mercury, Hg

The compound formed between mercury and silver is one of the earliest synthetic compound also known as vermilion and cinnabar. The bright red pigment of the HgS is used widely and is one of the most favorite pigment found in medieval European outstanding works of arts and in Chinese decorated wares made of lacquer as well as in mesoAmerica.

Answer:

12

Explanation:

Among the options, the laboratory test that would support a diagnosis of congestive heart failure is B. Troponin.

Troponin is a cardiac biomarker that is released into the bloodstream when there is damage to the heart muscle. Elevated levels of troponin in the blood are indicative of myocardial injury or infarction, including heart failure.

Congestive heart failure (CHF) is a condition characterized by the heart's inability to pump blood effectively, leading to fluid accumulation and congestion in various parts of the body. While troponin levels are primarily associated with myocardial infarction (heart attack), they can also be elevated in certain cases of heart failure.

In congestive heart failure, the heart muscle may be stressed or damaged, which can cause the release of troponin into the bloodstream. Therefore, an elevated troponin level, along with other clinical findings and diagnostic tests, can support the diagnosis of congestive heart failure.

It's worth noting that other laboratory tests and diagnostic tools, such as imaging studies (e.g., echocardiogram) and assessment of other cardiac biomarkers (e.g., B-type natriuretic peptide, brain natriuretic peptide), are often used in conjunction with troponin levels to evaluate and diagnose congestive heart failure accurately. A comprehensive clinical evaluation by a healthcare professional is necessary to make an accurate diagnosis and develop an appropriate treatment plan.

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Answer:

26.981538 just looked at it.

544.5 g of sulfuric acid can be produced from 200 g of SO₃ and 100 g of H₂O.

The balanced equation for the reaction between sulfur trioxide (SO₃) and water (H₂O) to produce sulfuric acid (H₂SO₄) is:

SO₃ + H₂O → H₂SO₄

To determine how many grams of sulfuric acid can be produced from 200 g of SO₃ and 100 g of H₂O, we need to use stoichiometry.

First, we need to find the limiting reactant, which is the reactant that will be completely consumed first, thereby limiting the amount of product that can be formed. We can determine the limiting reactant by calculating the number of moles of each reactant and comparing them based on their stoichiometric coefficients in the balanced equation.

Moles of SO₃ = 200 g / 80.06 g/mol = 2.499 mol

Moles of H₂O = 100 g / 18.02 g/mol = 5.548 mol

Based on the balanced equation, the stoichiometric ratio of SO₃ to H₂O is 1:1. Therefore, H₂O is the limiting reactant since we have more moles of H₂O than SO₃.

The amount of sulfuric acid that can be produced is limited by the amount of H₂O, which is 5.548 moles. According to the balanced equation, each mole of H₂O reacts with one mole of SO₃ to produce one mole of H₂SO₄. Therefore, the number of moles of H₂SO₄ that can be produced is also 5.548 moles.

The molar mass of H₂SO₄ is 98.08 g/mol. Therefore, the mass of H₂SO₄ that can be produced from 5.548 moles of H₂SO₄ is:

Mass of H₂SO₄ = 5.548 mol × 98.08 g/mol

= 544.5 g

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Explanation:

Hi,

The number of protons is equal to the atomic number. The number of electrons in a neutral atom is equal to the number of protons. So, in this case, you have 72 protons and 72 electrons.

I hope this helps :)

If an element has the atomic number 72, then the number of protons is also equal to 72. As it is clearly mentioned in the question that it is a neutral atom, which means the number of protons is equal to the number of electrons which is also 72.

An atomic number may be defined as the number of a chemical element in the modern periodic table through which the elements are systematically arranged in order of increasing the number of protons in the nucleus.

According to the context of this question, the atomic number of every element is always equal to the number of protons it has. While in a neutral atom, the number of electrons is equal to the number of protons. For calculating the number of neutrons, you have to subtract the atomic number from the atomic mass.

Therefore, there are 72 protons of an element whose atomic number is 72. The number of electrons is also 72.

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Ernest Rutherford and James Chadwick are credited with discovering protons and neutrons. Rutherford conducted studies in the early 1900s that proved the existence of a dense, positively charged core inside atoms, which he dubbed the "nucleus." He also discovered that the nucleus of an atom contains the majority of its mass.

James Chadwick investigated the structure of the nucleus using a technique known as "scattering experiments" in the early 1910s. He discovered that the nucleus is made up of two types of particles: protons and neutrons. Protons are positively charged particles, whereas neutrons are neutral particles (i.e. they have no charge).

The discovery of the nucleus by Rutherford was a significant step in understanding the structure of atoms. Chadwick's discovery of protons and neutrons, on the other hand, provided a more precise understanding of the nucleus' composition. The discovery of protons and neutrons spawned the area of nuclear physics, which investigates the properties and behaviour of atomic nuclei.

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Answer:

The common name for the compound H2O is water.

Explanation:

The systemic name of H2O is Dihydrogen monoxide.

Answer:

water

Explanation:

To determine the pKb1 of CO32-, we can use the relationship between pKa and pKb for conjugate acid-base pairs:

pKa + pKb = pKw

where pKw is the ionization constant of water, which is approximately 14. Therefore, we can rearrange the equation to solve for pKb:

The pKb value represents the negative logarithm of the equilibrium constant (Kb) for the reaction of a base with water. In this case, we are interested in the equilibrium reaction between CO32- and water, which can be represented as CO32- + H2O ⇌ HCO3- + OH-.

By utilizing the relationship pKa + pKb = pKw, we can rearrange the equation to solve for pKb. Given that pKa1 of H2CO3 is 6.35, we subtract this value from pKw (approximately 14) to obtain pKb1

pKb = pKw - pKa

pKb1 = 14 - 6.35 = 7.65

Since none of the given answer choices matches the calculated value, it seems there might be an error or omission in the available options. Please double-check the answer choices provided or refer to additional information to obtain the correct pKb1 value for CO32-.

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look at the clues by it and try not to trust the links they trying to give u...

but i kinda dont know myself  any periodic table i can look at?

The correct answer is we would require 10 L - 200 ml = 9.8 L of water.

How would you make 100 ml of TE buffer (10 mM Tris, 1 mM EDTA) if you have a 1M Tris solution, a 0.5M EDTA solution, and water?

To prepare 100 ml of TE buffer, you require 10 mM Tris and 1 mM EDTA.

Therefore, let's calculate the volume of stock Tris and EDTA solutions that we would require to prepare 100 ml of the buffer.

In a 1M Tris solution, there are 1000 mM. Therefore, for preparing 100 ml of buffer with 10 mM Tris concentration, we need:

V = (10 mM * 100 ml)/1000 mM = 1 ml

So, we would need 1 ml of 1M Tris solution. Similarly,In a 0.5 M EDTA solution, there are 500 mM. Therefore, for preparing 100 ml of buffer with 1 mM EDTA concentration, we need:

V = (1 mM * 100 ml)/500 mM = 0.02 ml

So, we would need 0.02 ml of 0.5 M EDTA solution. Now, we can make up the total volume with water. Therefore,To prepare 100 ml of TE buffer, we require 1 ml of 1 M Tris solution, 0.02 ml of 0.5 M EDTA solution, and 98.98 ml of water.

Describe how you would prepare 200 ml of a 0.25 M solution of NaOH (molecular weight = 40 g/mol)?To prepare 200 ml of a 0.25 M NaOH solution, we need to calculate the mass of NaOH required.

The formula to calculate the number of moles is:

No. of moles = (mass in grams)/Molar mass (in g/mol)

Therefore,0.25 moles = mass in grams/40 g/mol

So, mass in grams = 0.25 * 40 = 10 g

Therefore, we need 10 g of NaOH to prepare 200 ml of a 0.25 M solution of NaOH.

Now, let's dissolve 10 g of NaOH in water and make up the volume to 200 ml.

We have to use a volumetric flask to prepare the solution. Therefore, we should take some water in the flask, add NaOH powder to it, dissolve it, and then add more water to make the volume 200 ml.

How would you make 10L of a lx TAE buffer if you have a stock of 50x?To prepare 10 L of a 1x TAE buffer from a 50x stock, we have to dilute the stock 50 times.

Therefore, let's calculate the volume of the stock solution that we would need to prepare 10 L of the 1x TAE buffer.

We know that the dilution factor is 50x. Therefore, the volume of the stock solution required can be calculated as:

Volume of the stock solution = (Volume of diluted solution) / (dilution factor)= (10 L) / (50)= 0.2 L = 200 ml

Now, we would take 200 ml of the stock 50x TAE buffer and make up the volume to 10 L with water.

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Answer:

Explanation:

Percent composition tells you by mass what percent of each element is present in a compound. A chemical compound is the combination of two or more elements. ... The equation for percent composition is (mass of element/molecular mass) x 100.

Hope it helps:)

Answer:

Confirm the results

Explanation:

Answer:

its the answer from the guy above me so its B

Explanation:

Arrhenius acid

An Arrhenius acid is a compound that increases the concentration of H+ ions that are present when added to water. These H+ ions form the hydronium ion (H3O+) when they combine with water molecules.

The separation compound using diffrence in boiling point melting point like physical properties.

What is physical properties?

A physical property is the any  measurable property that  whose value describes the state of a physical in  system. Changes in the  system's physical property of  can be used to describe its transitions between the  momentary of state.

A physical property is a characteristic of the  matter that is not associated with in a  change in its chemicals composition. Familiar to the  examples of physical property that is include density, color, hardness, melting and boiling points, and the  electrical conductivity.

There are mainly two types of physical properties extensive and intensive.

Sol-The separation scheme to  used to separate the mixture of   based on differences in this  physical properties- such as boiling point, melting point, solubility in a given solvent these are the three components.

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