For a second order reaction where concentration is measured in molarity and time is measured in seconds, the units on the rate constant must be:___.

Answer:

pretty sure its C

Explanation:

Democritus was all about the consept f tiny indestructible partivls called atoms so C is the only one that doesn' t fit

Answer:

I'm pretty sure it's A

Dendral was the first expert system developed to determine the chemical structure of molecules.

A molecule refers to a set of (2) or more atoms that are chemically bonded collectively, which allows you to form the smallest essential unit of a chemical compound. additionally, molecules are capable of taking elements in a chemical reaction.

A molecule is the smallest particle of a substance that has all of the physical and chemical houses. Molecules are made up of one or extra atoms. A molecule is a hard and speedy of or greater atoms held together via the use of a way of appealing forces called chemical bonds.

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Answer:

alpha particles

Explanation:

alpha particles the least penetrating but potentially most damaging and gamma rays the most penetrating. A beta particle, also called beta ray or beta radiation, is a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay.

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Answer:

don't be sad you have a nice peach

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don't be sad go get a tattoo

Answer:

Netflix and chill | do you need d!c rn ? | spoil her

Explanation:

The chemical reaction taking place to let the meat be tenderized when it is soaked in lemon juice or vinegar is called denaturation.

Denaturation is a process where the protein structure of the meat changes due to the acidity of the lemon juice or vinegar. The acidity breaks down the proteins, making the meat more tender. This is why meat is often soaked in an acidic liquid such as lemon juice or vinegar to tenderize it.

Meat is left tenderized by soaking in a liquid like lemon juice or vinegar for several hours because the acid in the vinegar or lemon juice breaks down the proteins in the meat. The acidity breaks down the proteins, making the meat more tender and easier to chew. Vinegar and lemon juice work so well to tenderize meat because they contain acid. Denaturation is the process by which proteins are altered due to changes in pH, temperature, or other conditions. When meat is soaked in vinegar or lemon juice, the acid denatures the proteins in the meat, making it more tender.

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The heat absorbed or released by a substance when its temperature changes depend on its heat capacity (Cp). The Cp of the water is 1 cal/g°C. The heat released can be found by the following equation:

Where,

Q is the heat released or absorbed

m is the mas oof water, 15.5g

Cp is the heat capacity of water, 1cal/g°C

dT is the change in temperature

We replace the known values

In Joules the heat released will be:

the heat has a negative value, this is because the water released heat.

Answer:

The amount of heat released is 504 calories or 2019 joules

In safety and hazard communication, specific colors and markings are used to convey different types of hazards.  A barrier with yellow and purple markings indicates a radiation hazard.

In safety and hazard communication, specific colors and markings are used to convey different types of hazards. One such color combination is yellow and purple, which is commonly associated with a radiation hazard.

Radiation hazards refer to situations where there is potential exposure to ionizing radiation, such as alpha particles, beta particles, gamma rays, or X-rays. These types of radiation can have harmful effects on living organisms and require proper precautions to minimize the risks.

The use of a barrier with yellow and purple markings serves as a visual warning to indicate the presence of a radiation hazard. It alerts individuals to exercise caution, restrict access to the area, and take necessary safety measures to prevent unnecessary exposure. This may include the use of personal protective equipment (PPE), adherence to safety protocols, and following established procedures for handling and controlling radiation source.

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"Hypotonic solution," refers to a solution with the highest water concentration due to its lower solute concentration compared to the other options, leading to water influx into cells.

A hypotonic solution would be most likely to have the highest water concentration. In a hypotonic solution, the solute concentration is lower than that inside the cell or compared to another solution. As a result, water tends to move into the cell or the solution to equalize the concentration.

When a cell is placed in a hypotonic solution, water molecules will move into the cell through the process of osmosis. This influx of water increases the water concentration inside the cell, leading to cell swelling or even bursting in extreme cases.

Compared to hypertonic and isotonic solutions, a hypotonic solution has a lower solute concentration, allowing for a higher concentration of water molecules. This results in a higher water concentration in the solution. It's important to note that the concept of tonicity is related to the relative solute concentrations between two solutions and their effect on cell osmosis. In this case, a hypotonic solution is characterized by a higher water concentration compared to the other options.

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There are 2.4 moles of ethane (C₂H₆) in 81 grams of ethane (C₂H₆).

To calculate the number of moles of ethane in 81 grams, the formula to use is Number of moles = given mass / molar mass of the substance. Molar mass of C₂H₆ = 2 x (atomic mass of carbon) + 6 x (atomic mass of hydrogen) = 2 x 12.01 + 6 x 1.01 = 30.07 g/mol. Number of moles of C₂H₆ = 81 g / 30.07 g/mol = 2.698 mol.

Therefore, the number of moles of ethane (C₂H₆) found in 81 grams of ethane (C₂H₆) is 2.7 moles, which can be rounded off to 2.4 moles.

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It is important to realize that an element’s line spectrum can include emissions at wavelengths throughout the electromagnetic spectrum including ultraviolet, visible, and infrared then according to section 2 of the experiment visible region collecting data on hydrogen and helium’s line spectra

Electromagnetic spectrum are the spectrum in which electromagnetic radiation are classified wavelength into radio waves,  microwave, infrared, visible light, ultraviolet, X-rays and gamma rays and the types of electromagnetic spectrum are

The hydrogen line spectra fall between wavelength, 410 nm to 656 nm. The helium line spectra fall between wavelength, 400 nm to 781 nm and this two fall in the visible region of line spectra

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The compound is a substituted cyclohexane with halogens at positions 1 and 2 of the ring. It can exist as several stereoisomers, depending on the arrangement of the substituents around the ring. There are eight possible stereoisomers of 1-bromo-2-chlorocyclohexane, which are four pairs of enantiomers with different configurations of substituents on the ring.

There are four possible stereoisomers, which are cis-1-bromo-2-chlorocyclohexane, trans-1-bromo-2-chlorocyclohexane, cis-1-chloro-2-bromocyclohexane, and trans-1-chloro-2-bromocyclohexane. Cis-1-bromo-2-chlorocyclohexane has the bromine and chlorine substituents on the same side of the ring. Trans-1-bromo-2-chlorocyclohexane has the bromine and chlorine substituents on opposite sides of the ring. Cis-1-chloro-2-bromocyclohexane has the chlorine and bromine substituents on the same side of the ring, but at positions 1 and 2, respectively. Trans-1-chloro-2-bromocyclohexane has the chlorine and bromine substituents on opposite sides of the ring, but at positions 1 and 2, respectively. Each of these stereoisomers can exist as a pair of enantiomers, which are mirror images of each other. Therefore, there are eight possible stereoisomers of 1-bromo-2-chlorocyclohexane, which are four pairs of enantiomers with different configurations of substituents on the ring.

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Answer: The elements in Groups 2,15,16 and 17 of the Periodic Table are called alkali metals. They form ionic compounds when they react with non-metals. Their ions have a single positive charge. For example, sodium forms sodium ions, Na+

Explanation:

hope you understood

Answer:

4 moles...................

The correlation coefficient always takes a value between -1 and 1, with 1 or -1 indicating perfect correlation.

In a chemical reaction there is no change in the mass of the substance, because in a chemical reaction there is only a rearrangement of the atoms of the reactants to form a new arrangement as the product of the reaction, so that no atoms are lost or created. Therefore, the number of atoms to the left of the arrow must equal the number of atoms to the right of the arrow.

This principle is used to balance chemical equations. to equalize the number of atoms, the reaction equation in front of the chemical formula must be given a coefficient.

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The new molarity is 0.0216 M

The quantity of solute molecules per liter of solution is known as a solute's molarity or molar concentration. Sometimes the chemical formula of the solute is enclosed in square brackets to indicate the molar concentration of the solute. We may translate between the volume of the solution and the moles (or mass) of the solute using molar concentration.

Volume of sample used = 50 mL

molarity of H2SO4 used = 0.108 M

final volume of the solution = 250 mL

M1 x V1 = M2 x V2

where ,

M1 = molarity before dilution

V1 = initial volume

M2 = molarity of final solution

V2 = volume of the final solution

M2 = M1 x V1 / V2

= > M2 = 0.108 x 50 / 250 = 0.0216

Therefore, the molarity of the final solution is 0.0216 M

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Answer:

Five points of Dalton's atomic theory:

1) all elements are made up of atoms.  

2) atoms are so small that they cannot be divided any further.  

3) an atom can neither be destroyed nor be formed.  

4) atoms of an element are similar, they possess the same mass and same properties.  

5) atoms of different elements combine in a definite ratio to form compounds.  

Due to further experimentation, it was concluded that an atom is made up of small particles identified as protons, neutrons, and electrons. They can be further subdivided.

Another change is the presence of isotopes of atoms of different elements. Hence, atoms of the same element can also have different masses.

Hope this helps, have a nice day/night! :D

As per Dalton's atomic model atoms are the minuscule, distinct building blocks of all stuff.

What is Dalton's atomic model?

Dalton proposed that the concept of atoms may be used to explain the laws of conservation of mass as well as definite proportions. He proposed that atoms, of the kind, that he described as "solid, tightly compacted, hard, impenetrable, moving particle," are the smallest, indivisible units of matter.

Dalton's atomic model is as fellow:

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Answer:

Explanation:

A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms. These electrons are simultaneously attracted by the two atomic nuclei. A covalent bond forms when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions.

Answer:

The correct answer is - sudden static charge could damage sensitive medical equipment.

Explanation:

Staff members of a hospital or medical institution wear special shoes that are able to prevent static charge as they walk. These shoes help to prevent static charge as we know that the sudden transfer of a static charge to medical equipment may alter the reports or damage sensitive equipment. This type of static charge is negative or positive due to electronic devices touches the device leads to damage of electric devices.

Thus, the correct answer is - sudden static charge could damage sensitive medical equipment.

Answer:

malleable

Explanation:

The image represent in malleable property of metal.

The image possibly represents the photoelectric effect of a metal, which is when it emits electrons after being exposed to electromagnetic radiation. Metals are also characterized by physical properties such as conductivity, malleability, metallic luster, and metallic bonding.

Based on your question, the image possibly represents the photoelectric effect, a key property of metals. This phenomenon occurs when a metal surface exposed to electromagnetic waves of a certain frequency absorbs radiation and emits electrons. These emitted electrons are called photoelectrons. Metals can also exhibit free electron model behavior, where electrons freely roam within the metal structure.

Metals possess unique physical properties like conductivity, malleability, and metallic luster. Malleability refers to the metal's ability to deform without breaking, while conductivity refers to the metal's ability to transfer heat or electricity. A metallic luster gives metals their characteristic shiny appearance.

Finally, metals are also known for their metallic bonding—a unique force that holds together the atoms within a metallic solid. Metallic bonding gives rise to many useful and varied bulk properties of metals.

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Answer:

0.342 mol

Explanation:

Molar mass of  

NaCl = 58.4 g/mol

Number of moles in  

20.0 g NaCl

is

20.0

g

58.4

g

/mol

=

0.342 mol

All once-living things contain carbon - 14 and the amount begins to decrease when the tree dies. That's why we have to use 1 point carbon-14 to measure the half-life of a decaying tree.

Carbon-14 is a naturally occurring radioactive isotope of carbon with a half-life of 5730 years. Carbon-14 is produced in the upper atmosphere when cosmic rays hit nitrogen atoms. Carbon-14 is then oxidized to form carbon dioxide, which is assimilated by plants via photosynthesis.

The half-life of carbon-14 is used to determine the age of once-living organisms, including trees. Because carbon-14 decays over time, measuring its abundance in a sample allows scientists to determine how long it has been since the organism died.

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The decreasing bond length is H-I  > H-Br > H-F.

What is bond length?

The bond length is the separation between the centres of two atoms that are covalently bound. The number of bonded electrons influences the length of the bond (the bond order). Higher bond orders are related to shorter bond lengths and stronger forces between the two atoms.

What is bond order?

The shared covalent bonds between two atoms. When two atoms share one pair of electrons, one bond (bond order = 1) is created. A double bond is made up of two pairs of electrons (bond order = 2), whereas a triple bond is made up of three pairs of electrons (bond order = 3).

H-I > H-Br > H-F

With increase in atomic size from F to I ,bond length of H----X

bond increases

Therefore, the decreasing bond length is H-I  > H-Br > H-F.

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The direction in which the proteins migrate during electrophoretic separation of serum proteins at pH 8.6 is determined by their net charge.

The migration of proteins during electrophoresis is determined by their net charge, which is influenced by the pH of the surrounding medium. At pH 8.6, which is relatively alkaline, the proteins in serum typically carry a net negative charge.

In an electric field, proteins with a net negative charge will migrate towards the positively charged electrode (anode) because oppositely charged particles are attracted to each other.

Therefore, in electrophoretic separation of serum proteins at pH 8.6, the proteins will migrate towards the anode, moving in the direction opposite to the migration of the negatively charged ions present in the buffer solution.

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Answer:

Cohesion exists because of the polarity of water. The water has a dipole that causes it to act like a magnet, attracting other water molecules to it. ... The salt water has a much lower cohesion than plain water so it's attractive forces are less than plain water.

Answer:

Sc3F3

I hope its help for you

Answer:

beacuse water is same every where because it is the combination of h2 +o2 h2o which doesn't change while it is different

Explanation:

ok