A solution is made by dissolving 4.92 g of glucose (c6h12o6) in to 165 ml of water. the molality of this solution is ________ m, if the density of water is 1.00 g/ml.

Answer:

its placebo it is inactive substance not active like outer drugs which forms bonds with chemicals present in our body

When an acid is dissolved in water, by releasing protons into the solution, it lowers the pH.

What is pH?

The letters pH stand for the potential of hydrogen since pH is essentially a measurement of the number of hydrogen ions (i.e. protons) in a substance. The pH scale was created in 1923 by scientist Peter Lauritz Srensen. (1868-1969).

The pH of a solution is a key marker of its chemical makeup. The pH can have an impact on the biological processes that take place, the behavior of bacteria, and the behavior of chemicals.

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There are 3 experiments which helps to under water evaporation system.

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Having a half-life of 61 days, iodine-125 would take 122 days for a 0.25 g of iodine-125 to remain from 1.00 g of it.

Half-life, an aspect of radioactive decay, is defined as the amount time it takes a radioactive isotope to disintegrate by a half. The formula for half-life is given by:

N(t) =N(0) 1/2 ^ t/t(1/2)

where N(t) = amount of substance remaining

N(0) = initial amount of substance

t = elapsed time

t(1/2) = half-life of the substance

Using this formula where N(t) = 0.25 g, N(0) = 1.00 g, and t(1/2) = 61 days,

N(t) =N(0) 1/2 ^ t/t(1/2)

0.25 g = 1.00 g x (1/2)^t/61

(1/2)^t/61 = 1/4

t = 122 days

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Urn the gas off immediately if the flame sputters, flares, or goes out, or if you  smell gas.

If something which includes an engine or a flame sputters, it really works or burns in an uneven way and makes a chain of soft popping sounds.

What reasons a gasoline burner to sputter?

if your gasoline burner is hissing, sputtering, or burning a yellow flame, it isn't always running successfully. The problem is due to an excessive amount of or too little air being supplied to the flame. here is a way to make an adjustment: Wait to carry out your repair until the stovetop floor is cool

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oil, natural gas, coal..........

Answer:

Coal, oil, and natural gas

Explanation:

Coal is a material usually found in sedimentary rock deposits where rock and dead plant and animal matter are piled up in layers.

Answer:

Prolly 4

NH2 CONH2

Explanation:

No, the jewelry, could not be made of pure silver.

The characteristics of pure silver include being almost white, shiny, soft, ductile, malleable, and a superb conductor of both heat and electricity. Although it is not a chemically active metal, heated concentrated sulfuric acid and nitric acid both attack it and cause nitrate to form. Silver is one of the so-called precious metals, along with gold and the metals from the platinum group. Silver has been used for many years to make coins, ornaments, and jewelry due to its relative rarity, dazzling white color, malleability, ductility, and resistance to air oxidation. Silver is also a soft, malleable, highly ductile, and shiny metal. Despite having the highest electrical conductivity of any metal, its exorbitant cost prevents it from being widely used for electrical purposes. Silver is not a metal that reacts chemically.

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The names of the new substances formed are:

1) ammonium chloride (NH₄Cl)

2) Sodium chloride (NaCl)

3) Calcium chloride (CaCl₂) and carbon(IV) dioxide (CO₂)

1) Balanced chemical equation for reaction of ammonia (NH₃) and dilute hydrochloric acid (HCl):

HCl + NH₃ → NH₄Cl

2) Balanced chemical equation for reaction of sodium hydroxide (NaOH) and dilute hydrochloric acid:

HCl + NaOH →  NaCl + H₂O

3) Balanced chemical equation for reaction of calcium carbonate (CaCO₃) and dilute hydrochloric acid:

CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O

These chemical reactions are double displacement reactions, cations and anions of the two reactants switch places and form two new compounds.

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The number of sodium, potassium and ATP would be: 700 Na+ ions, 200 K+ ions and 900 ATP molecule.

The net charge differential would be -200.  

Potassium is important for keeping the body hydrated and with sodium support cellular function (sodium-potassium ( Na⁺/K⁺) pump).

The sodium-potassium pump releases three Na+ ions, while in the same time two K+ ions exit the cell. For this process one molecule of ATP is consumed.

Inside the cell, there are 1000 sodium ions, 1000 molecules of ATP.

While outside the cell, there are 1000 potassium ions.

After 100 cycles, 300 sodium ions will exit the cell and 200 potassium ions will enter the cell, using 100 ATP molecules.

1000 - 300 = 700; number of sodium ions (Na+) left in the cell

1000 - 100 = 900; ATP molecules left in the cell

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Answer:

28g Fe

Explanation:

source: https://www.answers.com/Q/How_many_grams_of_iron_will_be_needed_to_react_completely_with_an_excess_of_oxygen_to_form_40_grams_of_iron3_oxide

The electron configuration of ions derived by stable arrangement.

Their valence shell contains two or eight electrons. They don't acquire, shed, or distribute electrons.

An atom with a full outermost (valence) shell has a stable electrical configuration. The quantity of electrons that leave or enter an atom's outer shell is known as its valency.

A noble gas configuration is a stable electron configuration for representative or main group elements. By acquiring or losing electrons and forming ions, or by sharing electrons with other atoms, the representative elements' atoms can adopt a noble gas structure.

The stability of an electron arrangement can be predicted. When all of an atom's orbitals are filled, it is at its most stable and unreactive. The combinations with full energy levels are the most stable.

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Mass of water is 11.52 grams.

Overall chemical equation for reaction of combustion a compound containing only carbon and hydrogen:

CxHy + O₂ → xCO₂ + y/2H₂O

m(CxHy) = 7.02 g; mass of the compound

m(O₂) = 25.5 g; mass of oxygen

m(CO₂) = 21.0 g; mass of carbon dioxide

m(H₂O) = ?; mass of water

Conservation of matter states that the mass of the reactants have to be equal to the mass of the products.

m(CxHy) + m(O₂) = m(CO₂) + m(H₂O)

7.02 g + 25.5 g = 21.0 g + m(H₂O)

m(H₂O) = 32.52 g - 21.0 g

m(H₂O) = 11.52 g; mass of water

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8.21g of KMnO₄ correspond to 3.13 x 10²² formula units of KMnO₄? avogadro' s number is 6.022 x 10²³

Here,3.13 x 10²² formula units of KMnO₄=1 mole of KMnO₄/avagadro no

1 mole of KMnO₄/6.022 x 10²³

= 3.13 x 10²²/6.022 x 10²³

= 5.197moles of KMnO₄

Now KMnO₄ has molar mass is 158.034g/mol

5.197moles of KMnO₄=158.034/1 mole of KMnO₄

158.034×5.197=821.1g of KMnO₄

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Answer:

because when girl slide down then her body was in full speed and after that she gets up her hair is in the air because when she slide down her hair was also blowing in the air and after that her body thinks that they're still sliding down.so,it happened.

In this way, the Adhesion of water through hydrogen bonds to the molecules, which comprise the Villi on the cat's tongue.

What is Adhesion?

The act or quality of sticking or remaining fastened: the glue's adherence to the wood b. Physics The attraction between two substances that is strong enough to be seen at a macroscale and is caused by their differences.

What kind of bonds do water molecules form?

Hydrogen bonds form between nearby hydrogen and oxygen atoms of adjacent water molecules in the case of water. A bond known as a hydrogen bond is formed when individual water molecules are attracted to one another.

Which of the cat's tongue's villi works to resist gravity's pull downward?

By forming hydrogen bonds with the molecules that make up the villi on the cat's tongue, water adheres to them in this way, helping to fend off the effects of gravity. As a result, the phenomenon of adhesion aids in the maintenance of entire, joined drops of water.

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56.0g mass of MgO is produce.

A sample of 35.0 g of magnesium undergoes oxidation then the reaction is

2 Mg(s) + O2(g) → 2 MgO(s)

2×24.31                 2(24.31+16)

Molar mass of Mg = 24.31 g/mol     mass(Mg)= 35.0 g  

35.0 g of magnesium gives 80.62 MgO

24.31 g of mg will give 24.31×80.63/35.0=56.00g

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while a capacitor has a capability distinction between the plates it's miles said to be consistent.

each plates have different fee which means that one has better ability than the other.

V= potential distinction across the plates , when the capacity distinction V is improved , rate on capacitors additionally will increase such that the ratio Q/V , remains consistent i.e. capacitance remains consistent . due to the fact capacitance relies upon upon plate location , medium between plates and distance among plates .

consequently, whilst we be a part of them in parallel, charge will float from better to lower. and it continued to go with the flow until equilibrium (the whole method took just a few seconds), indicating that the capacity remains consistent.

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Most foods that are high in calcium are poor sources of iron. this statement illustrates the characteristic of a nutritious diet known as balance.

Nutrition is an important factor in health and development. Better nutrition is associated with improved infant, child, and maternal health, stronger immune systems, safer pregnancies and births, reduced risk of non-communicable diseases (such as diabetes and cardiovascular disease), and longer lifespans. doing. Healthy children learn better. Well-nourished people are more productive and can create opportunities to gradually break the cycle of poverty and hunger.

Malnutrition in all its forms poses a significant threat to human health. I'm facing Malnutrition has several forms and including undernutrition (wasting or underdevelopment), inadequate vitamins or minerals, overweight, obesity, and consequent diet-related noncommunicable diseases.

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Answer:

An atom is the smallest particle of an element and is the building block of all matter.

Answer: Alkene

Explanation:

this hydrocarbon has a double bond so it is an alkene.  it only needs to have 1 double bond in the formula.

if there were only C-C bonds in the molecule it would be an alkane. If there was a triple bond between 2 carbons it would be an alkyne.

Electronegativity

The tendency of an atom to pull electrons towards itself is called electronegativity.

It is the tendency of an atom to attract bonding pair of electrons towards itself. These atoms which are more electronegative are able to bear a negative charge and be stable.

Unlike electropositive elements which tend to lose electrons , electronegative elements hold on tightly to the electrons.

The electronegativity is measured using the Pauling Scale where the most electronegative element of the periodic table, Fluorine , is given a value of 4 and the rest of the elements have values lower than 4 according to the trends followed by their groups and periods.

The least electronegative element of the periodic table , Cesium has a value of 0.7 on the Pauling Scale.

Electronegativity increases when we move from left to right in the periodic table and it decreases (in general) when we move down the group.

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Analytical chemist analyses show that a sample of acetic acid contains 2.4 moles of carbon. The number of moles of hydrogen in the sample is 5.75 moles.

The mole is a SI unit of measurement that is used to calculate the quantity of any substance. Mole can be calculated by dividing the mass by the molar mass.

Acetic acid is a colorless liquid, with a pungent smell.

The formula of acetic acid is CH₃COOH

For every 12 moles of hydrogen, there's 1 mole of oxygen.

2.4 / 12 = 0.2.

Thus,  therefore, there are 5.75 moles of oxygen in the sample.

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The approximate concentration of reaction product in a solution that has an absorbance of 0.7 at ph 6.0 is based on the equation A = εbc given in the passage, the concentration c is the absorbance A divided by the absorptivity ε in a 1 cm path length cell. 0.7 divided by approximately 1400 gives 500 μM.

A = εbc

0.7 = 1400 x c

7/14000 = 1/2000 = 0.0005 = 5x10^-4 = 500 μM

1 μM = 1 x10 ^-6

The concentration of a substance is the amount of solute present in a given volume of solution. Concentration is usually expressed in molarity, defined as the number of solutes in 1 L of solution. Solution concentration is a measure of the amount of solute dissolved in a given amount of solvent or solution.

Concentrated solutions are solutions that contain relatively large amounts of solutes. Dilute solutions are solutions that contain relatively small amounts of solutes. The definition of concentration means the amount of an ingredient or part relative to other ingredients or parts. An example of concentration is the amount of salt to water in a brine solution.

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The compound classes are alcohol (hydroxyl group) and ether (ether group).

A unknown compound was found to have the molecular formula C₅H₁₂O₂.

Degree of unsaturation = (2C + 2 + N - X - H) / 2

Degree of unsaturation = (2 × 5 + 2 + 0 - 0 - 1) / 2

Degree of unsaturation = 0

C = number of carbon

H = number of hydrogen

N = number of nitrogen

X = number of halogen

The degree of unsaturation is 0, a unknow compound has only single bond.

Alcohols and ethers have single bonds and oxygen in their structure.

In the pictures below, there are examples of alcohol with two hydroxyl group (-OH)  and ether with two ether groups.

It cannot be carboxylic acid, because acid has double bon.

It cannot be phenol, because it must have minimum six carbon atoms.

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A solution of known concentration that is slowly added to a solution of unknown concentration is called titrant.

Titration is the steady addition of a known concentration solution (called a titrant) to a known volume of an unknown concentration solution until the reaction approaches neutralization, which is sometimes indicated by a color change.

Until the reaction is complete, the analyte (the unknown solution) is normally added in a known amount to the titrant (the known solution) through a buret. Knowing the volume of titrant added allows the concentration of the unknown to be calculated. An indicator is often used to indicate the reaction's endpoint or end of reaction.

Therefore, titration is a technique used to determine the concentration of an unknown solution.

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In the reaction between a monosaccharide and a ferric ion, The carbonyl carbon is oxidized to a carboxyl group, the cupric ion is reduced.

Chemical reactions often involve color changes, temperature changes, gas evolution, or precipitate formation. Simple examples of everyday reactions are digestion, combustion, and cooking. The definition of reaction is a reaction. An example of a reaction is someone stopping their car at a stop sign. noun. response to stimuli.

The five basic types of chemical reactions are combination, decomposition, single exchange, double exchange, and combustion. By analyzing the reactants and products of a particular reaction, we can classify them into one of these categories. Some responses fit into multiple categories. It is modeled after the old Italian reaction, the French response, derived from the medieval Latin response (nominative to react). It is a noun of action formed in Late Latin from the past participle stem of the Latin reader.

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Yes, the density of an object change if only the volume changes because density is an intensive property.

Density is the measure of the mass of matter contained by a unit volume.

This suggests that the density of a substance is a function of the mass and volume of the substance.

However, an increase in volume decreases the overall density of an object, making it float.

Therefore, yes, the density of an object change if only the volume changes because density is an intensive property.

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d5 electron count can exhibit both high-spin and low-spin states in an octahedral complex

Electron is a free, open-source software framework developed and maintained by GitHub. This framework is designed to build desktop applications using web technologies rendered using a variant of the Chromium browser engine and a backend using the Node.js runtime environment.

Electrons are negatively charged subatomic particles that are free to (not) bond with atoms. Electrons bound to atoms are one of the three main types of particles within atoms. The other two are protons and neutrons. Electrons, protons, and neutrons together form the nucleus.

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The correct order of increasing negative charge on carbon atom is :

CH₃F < CH₃OH < CH₃NH₂ < CH₃CH₃ < CH₃MgBr < CH₃Li

when the electronegativity of the element increases the positive charge on carbon will increases and negative charge on the carbon atom will decreases.    

Electronegativity   ∝  (+ charge on carbon)

Electronegativity    ∝   1 / (- charge on carbon)

Electronegativity is defined as tendency of an atom or group to attract electrons towards itself. higher the electronegativity of an atom , the more strongly that elements attract the electron towards itself. as the proton increases the electronegativity or attraction increases.        

according to electronegativity the following  order of increasing negative charge on carbon as follows:

 CH₃F < CH₃OH < CH₃NH₂ < CH₃CH₃ < CH₃MgBr < CH₃Li

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