what is 82 microliters in scientific notation​

Answer:

the rate of heat transfer is directly proportional to the mass flow rate.

Explanation:

There is an elementary equation from basic thermodynamics that states that the rate of heat transfer (Q) equals the mass flow rate (M) times a Constant (the specific heat of water) times the Delta T (fluid temp out minus fluid temp in): Q = M x C x Delta T In other words, the rate of heat transfer is directly proportional to the mass flow rate.

The allotropes of carbon are diamond and graphite. The allotropes can have same or different physical or chemical properties. The correct options are options A,B,D.

Allotropy is a property by which an element exist in more than one form. The different forms of element are called allotropes.

The features of graphite are :

1.Graphite form strong covalent bonds.

2. Graphite has delocalized electrons but they don't have metallic bonding.

3. There are total four electrons per carbon but only three electrons are available for covalent bond. One electron per carbon is responsible for delocalization.

4. Graphite forms a giant structures.

Therefore the correct options are option A,B,D.

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The temperature at which the pressure will be equal to 1.75 atm, given that the tank has an initial pressure of 101325 Pa is 257.25 degrees celsius

First, we shall list out the given parameters from the question. This is shown below:

The final temperature can be obtain as follow:

P₁ / T₁ = P₂ / T₂

1 / 303 = 1.75 / T₂

Cross multiply

1 × T₂ = 303 × 1.75

T₂ = 530.25 K

Subtract 273 to obtain answer in degree celsius

T₂ = 530.25 – 273 K

T₂ = 257.25 degrees celsius

Thus, the temperature required is 257.25 degrees celsius

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Answer:

Making observation

Explanation:

The correct answer to the question is: A) increase, decrease

The first ionization energies of the elements increase as you go from left to right across a period of the periodic table, and decrease as you go from the bottom to the top of a group in the table.

1. Going from left to right across a period, the atomic number increases, which means there are more protons in the nucleus. This results in a stronger attraction between the positively charged nucleus and the negatively charged electrons. As a result, it becomes harder to remove an electron, requiring more energy, and therefore the first ionization energy increases.

2. Going from the bottom to the top of a group, the atomic size decreases. This is because the number of energy levels or shells decreases, and the electrons are closer to the nucleus. As the distance between the nucleus and the outermost electrons decreases, the attractive force between them increases. Consequently, it becomes easier to remove an electron, requiring less energy, and therefore the first ionization energy decreases.

Therefore, the correct answer to the question is:

A) increase, decrease

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The molecular formula of the compound which has a molecular weight of 112.124 atomic mass units is C₆H₈O₂.

Molecular formula of any compound tells about the composition and numbers of each entities present in that molecule.

Steps involved in the prediction of molecular formula:

      Molar mass of C₃H₄O = 3(12) + 4(1) + 16 = 56

        112.124/56 = 2

        Molecular formula = (C₃H₄O)₂ = C₆H₈O₂

Hence correct option is (E).

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Answer:

Vapor pressure increases with temperature because molecular speeds are higher as temperature increases. Water boils at 100 °C because the vapor pressure exceeds atmospheric pressure at this temperature.

Explanation:

Answer: The strength of the gravitational force between two objects depends on two factors, mass and distance. the force of gravity the masses exert on each other. If one of the masses is doubled, the force of gravity between the objects is doubled. increases, the force of gravity decreases.

Explanation: Hope this Helps??

Answer:

(c) 4.4g

Explanation:

Given:

mass of calcium carbonate (mCaCO3) = 10g

MrCaCO3 = 100

To find: mCO2

Solution:

CaCO3 + 2HCl → CaCl 2 + H2O + CO2

Now,

MrCaCO3 = 40 + 12 + 16.3 = 100

Therefore,

Number of moles (n) = m/Mr

nCaCO3 = 10/100 = 0.1

The amount of moles is proportional to the coefficient of the reaction. Since both calcium carbonate (CaCO3) and carbon dioxide (CO2) have the same coefficient.

nCO2 = 0.1

MrCO2 = 12 + 16.2 = 44

mCO2 = 0.1 × 44 = 4.4g

Answer:

hypothalamus

Explanation:

Answer:

Explanation:

is the

Answer:a+b

Explanation:

Option D is correct. He has the lowest boiling point of the five substances, followed by LiCl, NBr3, Cl2S, and CH3COOH.

The boiling point of a substance depends on the strength of the intermolecular forces between its molecules. Among the five substances listed, He has the lowest boiling point because it is a noble gas, which means it has a full valence shell and does not participate in intermolecular interactions such as hydrogen bonding or dipole-dipole interactions.

In contrast, the other four substances have polar or polarizable molecules that can interact with each other, resulting in stronger intermolecular forces and higher boiling points.

CH3COOH (acetic acid) has the highest molecular weight and can participate in hydrogen bonding, which contributes to its relatively high boiling point. NBr3 (nitrogen tribromide) is a polar molecule that contains a highly electronegative element (nitrogen) and can participate in dipole-dipole interactions, also contributing to a high boiling point.

Cl2S (chlorine sulfide) is a polar molecule that contains a highly electronegative element (chlorine) and can participate in dipole-dipole interactions, resulting in a higher boiling point. LiCl (lithium chloride) is an ionic compound that forms strong ionic bonds between its positive and negative ions, contributing to its high boiling point.

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The precipitation reactions of silver ion, lead (II) ion, and mercury (I) ion with chloride ion have the following balanced net ionic equations:

Silver Ion (Ag+) Precipitation: Ag+ (aq) + Cl- (aq) -> AgCl (s)

Lead (II) ion (Pb2+) precipitation: Pb2+ (aq) + 2Cl- (aq) -> PbCl2 (s)

Mercury (I) Ion (Hg2+) Precipitation: Hg2+ (aq) + 2Cl- (aq) -> Hg2Cl2 (s)

In these reactions, the chloride (Cl-) ion combines with the appropriate metal ions (Ag+, Pb2+, and Hg2+) to produce insoluble chloride salts (AgCl, PbCl2, and Hg2Cl2) that precipitate out of the solution. When hydrochloric acid is introduced, this enables the separation and elimination of these cations from the mixture.

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The optimum pH range for blood is approximately 7.35 to 7.45. Deviations from this range can have serious consequences on physiological processes. The body employs three mechanisms to control pH: buffers, respiratory regulation, and renal regulation. Blood plays a crucial role in maintaining pH homeostasis by utilizing these mechanisms.

The optimum pH range for blood is tightly regulated between 7.35 and 7.45. If the blood pH deviates from this range, it can disrupt normal physiological processes. For example, if the blood becomes too acidic (pH below 7.35), a condition called acidosis occurs.

Acidosis can lead to impaired enzyme function, decreased oxygen delivery to tissues, and disruption of the central nervous system. On the other hand, if the blood becomes too alkaline (pH above 7.45), a condition called alkalosis occurs. Alkalosis can result in muscle twitching, confusion, and even seizures.

To maintain the pH within the optimal range, the body employs three primary mechanisms: buffers, respiratory regulation, and renal regulation. Buffers are chemical substances that can accept or donate hydrogen ions to resist changes in pH. They can bind excess hydrogen ions when blood becomes acidic or release hydrogen ions when blood becomes alkaline.

The respiratory system regulates pH by adjusting the levels of carbon dioxide (\(CO_{2}\)) in the blood through changes in breathing rate and depth. By altering the amount of \(CO_{2}\), the body can regulate the concentration of carbonic acid (\(H_{2}\)\(CO_{3}\)) and thus control pH. The kidneys play a crucial role in long-term pH regulation by selectively reabsorbing or excreting bicarbonate ions (\(HCO_{3}\)-) and hydrogen ions (H+) in the urine.

Hence, the optimum pH range for blood is approximately 7.35 to 7.45. Deviations from this range can lead to acidosis or alkalosis, disrupting physiological processes. The body controls pH through buffers, respiratory regulation, and renal regulation. Buffers resist pH changes, the respiratory system regulates \(CO_{2}\) levels to control carbonic acid concentration, and the kidneys selectively reabsorb or excrete bicarbonate and hydrogen ions to maintain pH homeostasis.

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Answer:

Light and heat

ur welcomeeeeeeee

Answer:

Light and Heat

Give the other guy brainiest

Explanation:

Thx for the point though

The correct answer is that none of the substances listed actually speeds up the absorption of alcohol.

As the rate of alcohol absorption depends on various factors such as the amount of alcohol consumed, the rate of gastric emptying, and the presence of food in the stomach. However, carbonated water and starchy foods may help slow down the absorption of alcohol by delaying the emptying of the stomach, which can result in a slower increase in blood alcohol concentration. Meat products may also help in slowing down the absorption of alcohol due to their high protein content, which can reduce the rate of gastric emptying. Plain water, on the other hand, may actually dilute the alcohol content in the stomach but will not speed up its absorption. It is important to note that while these substances may help to delay the absorption of alcohol, they do not reduce its effects on the body or prevent intoxication. The only effective way to reduce the effects of alcohol is to consume it in moderation or to avoid it altogether. It is also important to never drink and drive, and to seek medical attention if one experiences severe symptoms of alcohol consumption.

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According to the Nerst equation, when Ecell = 0 then : A) Q = K, the nerst equation is then :

log Keq = (n E°) / (0.0592 V)

The Nerst equation is given as follows :

E cell = E°cell  - (0.0592 V / n ) log Q

the electrical potential of the cell is depend on the Q, that reaction quotient of the reaction. at equilibrium ΔG = 0 . the reaction quotient    Q = K and from the equation , ΔG = -nFE , ans E = 0, now the nerst equation is given as :

0 = E° - ( RT / nF ) ln K

0 = E° - ( 0.0592 V / n) log K

log K = (n E°) / (0.0592 V)

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Answer:

Selenium trisulfide

Answer:

No, because the moon takes about 27 days to fully orbit which means that 3 weeks would not be enough to see all of the moon's phases, but if you think that you don't need 27 days due to the fact that some of the days there may not be a phase change then that is completely up to you.

Explanation:

Hope this helps:)...if not then sorry for wasting your time and may God bless you:)

Answer: Thus X is Plutonium

Explanation:

Alpha Decay: In this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. The mass number is reduced by 4 units and atomic number is reduced by 2 units.

General representation of alpha decay :

\(_{Z}^{A}\textrm{X}\rightarrow _{Z-2}^{A-4}\textrm{Y}+_2^4\textrm{He}\)

where Z = atomic number

A= mass number

X and Y = atomic symbol of elements

\(_{Z}^{A}\textrm{X}\rightarrow _{92}^{235}\textrm{U}+_2^4\textrm{He}\)

Thus \(_{94}^{239}\textrm{Pu}\rightarrow _{92}^{235}\textrm{U}+_2^4\textrm{He}\)

Thus X is Plutonium with atomic number 94 and mass number 239

Answer:

the answer is D on edge

Explanation:

The balanced nuclear equations for the following:(c) Alpha decay of ²¹²₈₃Bi is ^22688Ra → ^22286Rn + ^42He

Alpha decay usually occurs in heavy nuclei such as uranium or plutonium, and therefore is a major part of the radioactive fallout from a nuclear explosion.

Alpha decay occurs most often in massive nuclei that have too large a proton to neutron ratio. An alpha particle, with its two protons and two neutrons, is a very stable configuration of particles.

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Taking into account the definition of calorimetry, the temperature change of A will be one sixth of the temperature change of B.

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).

So, the equation that allows to calculate heat exchanges is:

Q = c× m× ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case, for object A:

QA = cA× mA× (ΔT)A

and for object B:

QB = cB× mB× (ΔT)B

You know:

Object A has double the specific heat of object B. ⇒ cA= 2× cB

Object A has triple the mass of object B. ⇒ mA= 3× mB

If the same amount of heat is applied to both objects ⇒ QA= QB

Then:

cA× mA× (ΔT)A= QB = cB× mB× (ΔT)B

2× cB × 3× mB× (ΔT)A=  cB× mB× (ΔT)B

Solving:

6× cB × mB× (ΔT)A= cB× mB× (ΔT)B

(ΔT)A= (cB× mB× (ΔT)B) ÷ (6× cB × mB)

(ΔT)A=\(\frac{1}{6}\) (ΔT)B

Finally, the temperature change of A will be one sixth of the temperature change of B.

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The observed mass increase was probably caused by the osmosis of water molecules from an unidentified solution.

Osmosis is the "Movement of Solute Molecules from Lower Concentration to a Higher Concentration of Solution Across a Semipermeable Membrane," according to the right definition.

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Answer:

Melting and Boiling points

Explanation:

The boiling point of a liquid is 100°C and the melting point is 0°C; this can help identify whether or not the liquid is pure or could potentially be water.

The molarity of the 10.0% CaCl₂ solution is 0.9007 M

Molarity of a solution is defined as the number of moles of solute present in 1 litre of the solution.

To calculate the molarity of the CaCl₂ solution, we need to first determine the mass of CaCl₂ present in one liter i.e. 1000 ml of the solution.

A 10.0% CaCl2 solution means that 10.0 g of CaCl₂ is present in 100 g of the solution.

We can use this information to calculate the mass of CaCl2 in one liter of the solution as follows:

Mass of CaCl₂ in 1 L

= (10.0 g CaCl₂ / 100 g solution) x (1000 g solution / 1 L solution)

∴ Mass of CaCl₂ in 1 L = 100 g CaCl₂ / 1 L solution

Now since we know the mass of CaCl₂ in one liter of the solution, we can use the molarity formula to calculate the molarity of the solution:

Molarity = moles of solute / volume of solution (in liters)

To find the moles of CaCl₂ present in one liter of the solution, we need to divide the mass of CaCl₂ by its molar mass.

The molar mass of CaCl₂ is 110.98 g/mol

moles of CaCl₂ in 1 L

= 100 g CaCl₂ / 110.98 g/mol

= 0.9007 mol

Finally, we can use the formula for molarity to calculate the molarity of the solution:

Molarity = moles of solute / volume of solution in L

Molarity

= 0.9007 mol / 1 L

= 0.9007 M

Thus, molarity of the solution is 0.9007 M

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An initial change brought on by cutting down on a reactant in an equilibrium system is an increase in the concentration of the products. Here option B is the correct answer.

When a reactant is reduced in a system at equilibrium, the system is no longer in equilibrium and will try to re-establish equilibrium. The system will do this by shifting the equilibrium position in the direction that reduces the effect of the change. In this case, reducing the amount of a reactant will cause the system to shift in the direction that produces more of that reactant.

This means that there will be an initial decrease in the concentration of the remaining reactants, as the system tries to produce more of the reactant that was reduced. At the same time, there will be an increase in the concentration of the products, as the increased production of the reactant leads to increased production of the products.

However, as the system moves towards a new equilibrium position, the concentrations of all species will change until a new equilibrium is established. This new equilibrium will depend on the specific equilibrium reaction and conditions of the system.

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Complete question:

Which of the following is an initial change caused by reducing the amount of a reactant from a system that is at equilibrium?

A) An increase in the concentration of the remaining reactants.

B) An increase in the concentration of the products.

C) A decrease in the concentration of the remaining reactants.

D) A decrease in the concentration of the products.

Propene on reaction with N-bromosuccinimide in CCl4 produces 3-bromopropene.

In this reaction, allylic H atom is replaced with Br atom.

An allylic radical is the kind of reactive intermediate that is created when propene reacts with n-bromosuccinimide (nbs) to produce 3-bromo-1-propene. With NBS as one of the reactants, it is likely that a free radical bromination will take place.

The methyl group in propene would be attacked because the free radical that is forming can only be stabilized via resonance. A radical is said to be allylic if its resonance forms, which individually include unpaired electrons, are all located on an allylic carbon. Depending on where the allylic carbon is located, it can be categorized as a primary, secondary, or tertiary allylic radical.

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Three structural isomers with the formula C5H12 according to their IUPAC nomenclature are pentane, 2-Methylbutane and 2-Methylpropane (Isobutane).

(A) Isomer with 5 carbon atoms in the main chain:

Name: Pentane

Structure:

CH3 - CH2 - CH2 - CH2 - CH3

B. Isomer with 4 carbon atoms in the main chain:

Name: 2-Methylbutane

Structure:

CH3 - CH(CH3) - CH2 - CH3

C. Isomer with 3 carbon atoms in the main chain:

Name: 2-Methylpropane (Isobutane)

Structure:

CH3 - CH(CH3) - CH3

These are the three structural isomers of C5H12, named according to the IUPAC nomenclature.

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Answer:

Elements are distinguished from one another by their atomic numbers. No two elements have the same atomic number. It is the atomic number, and therefore the number of protons in its atomic nuclei, that define an element.