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_______ scientists study the properties of substances that are either synthetic or natural.

Gamma radiation can penetrate the deepest into body tissue among the given forms of radiation.

Gamma radiation has the highest energy and smallest wavelength, which allows it to easily penetrate through the human body's soft tissues. Alpha particles, on the other hand, have a large size and low energy, which make them easily blocked by even a piece of paper. Beta particles are more energetic than alpha particles and can penetrate a few millimeters of human tissue, but not as much as gamma rays. Positrons have similar characteristics to electrons, which can penetrate a few centimeters of tissue, but still not as much as gamma radiation. Protons also have a limited penetration depth and are used for localized cancer treatment.

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Answer:

Water is a remarkable substance, and its unique properties are largely due to the presence of polar covalent bonds and hydrogen bonds in its structure. These characteristics play a crucial role in the physical and chemical properties of water, making it essential for life as we know it.

Explanation:

The polar covalent bonds in water arise from the unequal sharing of electrons between oxygen and hydrogen atoms. This results in the oxygen atom having a partial negative charge (δ-) and the hydrogen atoms having partial positive charges (δ+). These charges create polarity within the water molecule, leading to the formation of hydrogen bonds.

Hydrogen bonds occur when the partially positive hydrogen atom of one water molecule is attracted to the partially negative oxygen atom of another water molecule. These hydrogen bonds are relatively weak individually, but when present in large numbers, they contribute to the cohesion, surface tension, and high boiling point of water.

The importance of these bonds is manifold. The cohesion between water molecules due to hydrogen bonding enables water to form droplets, have a high surface tension, and flow freely, facilitating transport within organisms and in the environment. Additionally, hydrogen bonding leads to the high specific heat capacity and heat of vaporization of water, making it an effective regulator of temperature in living organisms and ensuring stable environmental conditions.

Furthermore, hydrogen bonds play a crucial role in the unique properties of water as a solvent. The polar nature of water allows it to dissolve a wide range of substances, including ionic compounds and polar molecules, facilitating various biological processes such as nutrient transport and chemical reactions in cells.

Answer:

Explanation:

-------Choices  ---------------

Predict

Use variable

Plan and conduct investigations

Hypothesize

Measure

Classify and order

Record and display data

Use time and space relationships

Use numbers

=================

Selection:

These are in approximate order:

Plan and conduct investigations:  Design experiments that test the hypothesis.  E.g., see if any neutrons are reflected backwards.  If they are, the hypothesis needs to be changed.

Measure:  Do the work.  Calibrate the equipment and record everything.

Record and display data:  Publish the results and conclusions for peer review.  Seek other's input in order to generate general agreement that the data, procedure, and conclusions are warranted.

===

Use numbers?  Nah.  Not if they are not required to reach a conclusion.(e.g., the precipitate will be pink or the reaction will stink).

Use Time and Space Relationships:  Yes, but only if the hypothesis depends on them.

Classify and Order:  OK, especially if you are a biologist, but not always necessary.

Use variable:  usually, but what and how depends on the experiment.

Blame:  Place blame on the lab partner (Just kidding).

Answer:c

Explanation:

Answer:

It's organic

Explanation:

Answer:

A three-carbon chain has a straight line extending from the center carbon.

Explanation:

Isomers are compounds having the same molecular formula but different structural formulas.

Butane and 2-methylpropane are constitutional isomers. Constitutional isomers differ in the way that the constituent atoms are connected to each other.

Butane is a straight chain compound while the compound 2-methylpropane consists of a three-carbon chain which has a straight line extending from the center carbon.

Answer:

it is b on edge 2021

Explanation:

Regioselectivity is the tendency for chemical bonds to form or break in one direction over all other potential directions, whereas stereospecific mechanism describes the stereochemical outcome of a given reactant.

Regioselectivity occurs when two possible reaction products are regioisomers. Stereoselectivity exists when two possible reaction products are stereoisomers. Chemoselectivity refers to a reactant's preference for one functional group over another inside a substrate. Markovnikov's law predicts the regiochemistry of his HX addition to unsymmetrically substituted alkenes. The regioselectivity of elimination reactions is explained by the Zaitsev and Hoffman rule. When only one regioisomer is created as the primary byproduct, a reaction is said to be regioselective. They are positional isomers because of where the double bonds are located in the two alkenes. a strategy that prioritizes some atoms above other possible bond-forming atoms.

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Inheritance. Infant lactose intolerance is passed down in the autosomal recessive form, meaning that both copies of LCT gene present in every cell are mutated.

In families, lactose intolerance is common (hereditary). In these circumstances, the body of the individual may produce less lactase over time. Teenage or adult years may be when symptoms first appear. After an accident, a sickness, or an infection, the small intestine may occasionally stop producing lactase.

A recessive condition, lactose intolerance. A recessive condition can only manifest if both of the gene's copies, or alleles, are identical. People who are lactose intolerant and have cytosine (C) residues on both alleles near to the lactase locus do not make lactase as adults.

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we use the formula

pV=nRT

we convert Kilo Pascals to mmHg

253.25 KPa=253250 pascals

1mmHg is equal to 133.322 pascals

xmmHg are equal to 253250pascals

x=253250/133.322=1900mmHg

now we convert mmHg to atmospheres

1 atmosphere is equal to 760mmHg

x atmospheres are equatl to 1900mmHg

x=1900/760=2.5 atmospheres

in the formula:

pV=nRT

p-pressure

V-volume

n-number of moles

R-ideal constant of gases

T-temperature

the only missing variable is temperature since we know that  R=0.082

250ml=0.25L

0.25*2.5=0.1*0.082T

T=0.625/0.0082=76.219K

Answer:

False . Not all substances can be put in the trash for disposable

Explanation:

the final pressure of the air sample when cooled from 448 K to 224 K, with constant volume, is approximately 3.75 atm.

The final pressure of the air sample can be determined using the combined gas law, which states that P1/T1 = P2/T2, where P1 and T1 are the initial pressure and temperature, and P2 and T2 are the final pressure and temperature, respectively. Since the volume remains constant, we can use this formula to solve for P2:
P1/T1 = P2/T2
Plugging in the given values, we get:
7.50 atm / 448 K = P2 / 224 K
Simplifying and solving for P2, we get:
P2 = (7.50 atm / 448 K) * 224 K
P2 = 3.75 atm
Therefore, the final pressure of the air sample is 3.75 atm.
We'll be using the Combined Gas Law formula to solve this, but since the volume remains constant, we can simplify it to Gay-Lussac's Law.
Gay-Lussac's Law: P1/T1 = P2/T2
Where:
P1 = initial pressure = 7.50 atm
T1 = initial temperature = 448 K
P2 = final pressure (what we're solving for)
T2 = final temperature = 224 K
Step 1: Rearrange the equation to isolate P2:
P2 = (P1/T1) * T2
Step 2: Plug in the given values:
P2 = (7.50 atm / 448 K) * 224 K
Step 3: Calculate the final pressure:
P2 = (0.0167410714286) * 224 K
P2 ≈ 3.75 atm
So, the final pressure of the air sample when cooled from 448 K to 224 K, with constant volume, is approximately 3.75 atm.

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The term used for the geometrical isomer shown below is the term "cis-isomer."

Cis-trans isomerism, also known as geometric isomerism or configurational isomerism, is a type of stereoisomerism that occurs in alkenes and cyclic compounds.

Cis-isomer and trans-isomer are two types of stereoisomers.

Cis-isomer refers to a molecule in which two functional groups or substituents are on the same side of the double bond or ring.

Cis-isomerism occurs when substituents on a double bond or ring have the same spatial orientation.

The molecule shown below is an example of a cis-isomer.

Cis-isomers and trans-isomers have the same molecular formula and sequence of bonded atoms but differ in their spatial arrangement.

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There would be an increase in the concentration of carbonic acid - this is how an increase in carbon dioxide concentration influences the system.

In chemistry, a dynamic equilibrium lives once a reversible reaction occurs. Substances transition between the reactants and products at equal rates, indicating there is no net change. Reactants and products exist formed at such a rate that the concentration of neither changes. It is a precise example of a system in a steady state. After a time, a reversible reaction in a closed system can get what we call a dynamic equilibrium.

The correct answer is option D.

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Answer:

black hole in ourter space for the first time the scientific research

and development of the following layers lethargic

Explanation:

STUDY CORRECTION.

The batch reactor time for 40% conversion is twice as long as the batch reactor time for 80% conversion.

The batch reactor (BR) time required to achieve a particular conversion depends on the reaction rate constant, the initial concentration of reactants, and the reaction order. Without knowing these parameters, it is not possible to calculate the BR times directly.

To calculate the batch reactor (br) times to achieve 40% and 80% conversion when 400 moles of A are charged to a 400 dm3 reactor, we can use the following formula:

t = V/(rA * XA)

where t is the batch reactor time, V is the volume of the reactor, rA is the rate of reaction for species A, and XA is the conversion of species A.

For 40% conversion:

t = 400 dm3/(rA * 0.40)

t = 1000 dm3/rA

For 80% conversion:

t = 400 dm3/(rA * 0.80)

t = 500 dm3/rA

Without the value of rA, we cannot calculate the exact batch reactor times. However, we can see that the batch reactor time for 40% conversion is twice as long as the batch reactor time for 80% conversion.

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Answer: number 1

Explanation:

Answer:

Mercury is a poor conductor of heat, but a fair conductor of electricity. Mercury has a unique electron configuration which strongly resists removal of an electron, making it behave similarly to noble gas elements. As a result, mercury forms weak bonds and is a liquid at room temperature.

Explanation:

hope it helps, if not im sorry

Due to a phenomenon known as diamagnetic anisotropy, aromatic protons emit signal(s) in the range of 7-8 ppm.

In aromatic compounds with resonance in the 7–8 ppm range, this impact is more prominent. A ring current is the term for the movement of the p electrons in benzene, and it induces an extra magnetic field that helps the protons. While the signals attributable to its aromatic carbons were seen in the range from 128 to 133 ppm, those for the aromatic phthalate ring protons were seen in the range from 7.63 to 7.82 ppm. ... the cis/trans-cyclohexylene CH carbon signals were detected in the range of 70.8 to 72.3 ppm.

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Answer:

wrong.

Explanation: charged atoms have have more electrons than neural because  they charge it . a  neural atom has eaqual number of electrons and neutrons.

hope this helps(^人^)

A column or plume in hydrodynamics is a vertical body of one fluid moving through another. Momentum (inertia), diffusion, and buoyancy are a few of the factors that govern how the fluid moves (density differences).

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Answer:

Burned Energy

Explanation:

Energy that burns

Answer:

Any of a large group of organic compounds occurring in foods and living tissues and including sugars, starch, and cellulose. They contain hydrogen and oxygen in the same ratio as water (2:1) and typically can be broken down to release energy in the animal body.

Explanation:

Hope this helps

(didn't get this from the internet)

The mass percent of oxygen in acetaminophen is approximately 21.18% which is present in a single tablet of regular strength tylenol contains 325 mg of the active ingredient.

To find the mass percent of oxygen in acetaminophen, we need to first determine the mass of oxygen in one mole of acetaminophen.
The molecular formula of acetaminophen (\(C_8H_9NO_2\)) indicates that there are two atoms of oxygen in one molecule of acetaminophen.
The molar mass of acetaminophen is 151.17 g/mol.
To find the mass of oxygen in one mole of acetaminophen, we can use the molar mass of oxygen (16.00 g/mol) and the number of oxygen atoms in one mole of acetaminophen (2):
mass of oxygen = 16.00 g/mol * 2 = 32.00 g/mol
Therefore, the mass percent of oxygen in acetaminophen can be calculated by dividing the mass of oxygen by the total mass of one molecule of acetaminophen (using the molar mass):
mass percent of oxygen = (32.00 g/mol / 151.17 g/mol) * 100% = 21.18%

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Explanation:

It suggests that the extranuclear part consists of electrons in specific spherical orbits around the nucleus.

The reaction is chemical and endothermic.

One or more chemicals, also referred to as reactants, are transformed into one or more other substances, often referred to as products, in a chemical reaction.

Chemical processes that can release or absorb energy are referred to as endothermic. In endothermic reactions, more energy is absorbed when bonds in the reactants are broken than is released when new bonds are generated in the products.

Given that the reaction between vinegar and baking soda is a chemical reaction and the mixture cools as a result, the process is endothermic and heat is absorbed ( as it happens in endothermic reactions).

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The complete question is :

Which best describes what is occurring in the reaction? When vinegar and baking soda react, the mixture becomes cold to the touch and gas and a new liquid substance are formed.

a. The reaction is chemical and endothermic.

b. The reaction is chemical and exothermic.

c. The reaction is non-chemical and endothermic.

d. The reaction is non-chemical and exothermic.​

Answer:

0.086J/g°C

Explanation:

The following data were obtained from the question:

Mass (M) = 30g

Initial temperature (T1) = 10°C

Final temperature (T2) = 45°C

Change in temperature (ΔT) = T2 – T1 = 45°C – 10°C = 35°C

Heat (Q) released = 90J

Specific heat capacity (C) of wood =..?

We can obtain the specific heat capacity of the wood as follow:

Q = MCΔT

90 = 30 x C x 35

Divide both side by 30 x 35

C = 90/(30 x 35)

C = 0.086J/g°C.

Therefore, the specific heat capacity of the wood is 0.086J/g°C.

The partial pressure of nitrogen in the resulting mixture, given 1.92 moles of N₂ and 2.69 moles of O₂ in a 60.41 L container is 78.96 KPa

The folloing data were obatined from the question:

From the above, we can obtain the partial pressure of nitrogen as illustrated below:

PV = nRT

60.41 × P = 1.92 × 8.314 × 298.83

Divide both sides by 60.41

P = (1.92 × 8.314 × 298.83) / 60.41

P = 78.96 KPa

Thus, we can conclude that the partial pressure of nitrogen is 78.96 KPa

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The per cent recovery of cinnamaldehyde is 0.678%, which means that only a small amount of cinnamaldehyde was recovered from the cinnamon.

In this case, the student used 9.00 grams of ground cinnamon to isolate 61.0 milligrams (mg) of cinnamaldehyde.

To calculate the per cent recovery, we need to convert the mass of cinnamaldehyde from milligrams to grams by dividing by 1000, since there are 1000 milligrams in a gram. So, 61.0 mg is equal to 0.061 grams.

To calculate the per cent recovery, we divide the mass of cinnamaldehyde obtained (0.061 g) by the mass of cinnamon used (9.00 g) and then multiply by 100 to get the percentage. The calculation is as follows:

First, we need to convert the mass of cinnamaldehyde from milligrams to grams. Since there are 1000 milligrams in a gram, 61.0 mg is equal to 0.061 grams.

Next, we calculate the per cent recovery by dividing the mass of cinnamaldehyde obtained by the mass of cinnamon used and multiplying by 100.

Per cent recovery = (0.061 g / 9.00 g) x 100

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