The amount of heat transferred to a system can be measured in _________________.

Answer:

I’m not sure! Bacteria are kind of disgusting, but some of them might be helpful.

Explanation:

My opinion since I didn't get to read the article :)

Answer:

27.2 kg

Explanation:

13.6 * 2 L of commercial flask of mercury = 27.2 kg.

Hope this helps! Have a good day! :D

Answer:this case, the mass is 2.0g, the specific heat capacity of water is 4.18J/g/K, and the change in temperature is 5.0°C=5K , therefore the energy needed to raise it is: 5×2×4.18=41.8J

Explanation:

The mass of liquid mercury that can fill glass tube is 680.365 gm.

We know that ,

Volume of cylinder = π[tex]r^{2} h[/tex]

where r is the radius of cylinder and h is the height

Here diameter of glass tube is 16mm

Thus the radius r = 8 mm

                           = 0.8 cm

Volume of glass tube = π [tex]0.8^{2}[/tex][tex]*25[/tex] [tex]cm^{3}[/tex]

Density of mercury given is [tex]13.53gm/cm^{3}[/tex]

We know that

Density =  Mass / Volume

∴ [tex]13.53gm/cm^{3}[/tex]  =  Mass/ π[tex]0.8*0.8 * 25[/tex]

Mass =  13.53 *π0.8*0.8*25

         = 680.36 gm

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The experiment described in the question given above supports the law of conservation of mass.

In chemistry, decomposition may be defined as a type of chemical reaction through which one reactant molecule significantly breaks down into two or more product molecules.

The same concept is applied in the question as well where the heating of mercuric oxide produces mercury and oxygen. According to the question, the mass of the reactant is equal to 2.16g, while the mass of the product is equal to 2.00 g plus 0.16 g which is togetherly 2.16 g.

Therefore, the experiment described in the question given above supports the law of conservation of mass.

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There are thousands of hydrogen atoms so together they can let off or group up to form all four colors.

Hydrogen is a chemical element with the symbol H and atomic number 1. Hydrogen is the lightest element. Under standard conditions, hydrogen is a diatomic molecular gas of the formula H2. It is colorless, odorless, tasteless, non-toxic, and highly flammable.

Hydrogen is an energy carrier that can be used to store, transfer, and deliver energy generated from other energy sources. Hydrogen fuel can be produced today by several processes. The most commonly used methods today are natural gas reforming (a thermal process) and electrolysis. It is found in the Sun and most stars, and the planet Jupiter is composed primarily of hydrogen. On Earth, hydrogen is most abundant as water. As a gas in the atmosphere, it is present in trace amounts, less than 1 ppm by volume.

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Answer:

C

Explanation:

2 linear positional isomers of nonene are there

Nonene have molecular formula is C₉H₁₈ called nonene no of possible isomers are 35 but including branched there are 35 isomers of nonene while linear compound mean only straight chain compound here straight chain compound are only 2 common name for nonene is non-1 ene there are so many isomers are seen in nonene Straight chain, Octanes, Heptanes,3,1 Dimethylheptanes,3,2 Ethylheptanes, Hexane, 4.1 Trimethyl. 4.2 Methyl+Ethyl, Pentane. in nonene class of organic compounds known as unsaturated aliphatic hydrocarbons. these are aliphatic hydrocarbons that contains one or more unsaturated carbon atoms. These compounds contain one or more double or triple bonds.

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If Benjamin Franklin had decided to call the charge on the amber rod positive, nothing would have changed only that we would have a different convention for identifying charges.

We know that electricity has to do with the flow of  current, there are fundamentally two kinds of charge, a positive and a negative charge. We know that the kind of charge that a material carries is arbitrary.

As we can see here, it was Benjamin Franklin in 1750 that defined the charge on the glass rod and the charge on the amber rod as negative. If Benjamin Franklin had decided to call the charge on the amber rod positive, nothing would have changed only that we would have a different convention for identifying charges.

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The complete hydrolysis of a protein produces a mixture of free amino acids.

Acids are molecules or ions that can donate protons, known as Bronsted-Lowry acids, or form covalent bonds with electron pairs, known as Lewis acids. The first category of acids is proton donors or Brønsted-Lowry acids.

No oil is either an acid or a base. Neutral. Oil is a neutral, nonpolar chemical. That is, it is a viscous liquid at room temperature. It is immiscible with water, but soluble in alcohol and ether. Whole eggs are relatively pH neutral, but egg whites are one of the few foods that are naturally alkaline, with an initial pH of as high as 7.6 when eggs are laid, but the alkalinity increases as eggs age and reach increases. the pH of 9.2.

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In a phospholipid, the end of the molecule likely to face towards a nonpolar environment is end with fatty acid chain.

Phospholipids are a group of polar lipids that consist of two fatty acids, a glycerol unit and a phosphate group which is esterified to an organic molecule such as choline, ethanolamine, inositol etc. phospholipids are composed of a phosphate group, two alcohols, and one or two fatty acids. on one end of the molecule are the phosphate group and one alcohol this end is polar, i.e. has an electric charge, and is attracted to water means hydrophilic. the other end, which consists of the fatty acids, is neutral it is hydrophobic and water insoluble.

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Body temperature is controlled by a negative feedback control system.

What is negative feedback?

In biological systems, a type of control known as negative feedback occurs when a process's output lowers its own stimulus. A common regulation mechanism in many biological responses is feedback. The body may regulate numerous aspects of its internal environment by permitting particular routes to be switched on and off. This is like turning a switch. Feedback enables a pathway's output to operate a switch. Negative feedback, often known as a "negative feedback loop," happens when a pathway's end product disables the corresponding metabolic step.

In order to maintain body temperature, the hypothalamus reacts to this information by directing nerve impulses to effectors. For instance, the hair erector muscles tighten up if we get too cold. As a result, a layer of air is trapped near to the skin, raising the skin hairs. Systematic negative feedback regulates body temperature.

Thus the hypothalamus is the vital organ for this system.

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Suppose we heat a 4. 31 g sample of a Na2Co3 hydrate. after thorough heating, the mass of the compound is 3. 22 g based on the data, Na₂CO₃ • 2H₂O for the hydrate we start with this formula.

Here compound are Na₂Co₃ then mass of compound is 3.22g and molar mass is 105.98g/mol

Moles of compound (anhydrate Na₂CO₃) = mass / molar mass = 3.22 g / 105.98 g mol = 0.0304 mol mass

So here compound Na₂Co₃ are given and we start with formula Na₂CO₃ • 2H₂O  for the hydrate.

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Ionization energy : the minimum amount of energy demands to detach an electron from an isolated atom.

Ionization energy also known as potential energy.

The charge of the nucleus increases from side to side in a row and so there is an increase in the attraction in the middle of the nucleus and the surrounding electrons.  As we move from side to side in a periodic table from left to right, the nuclear charge increases. This is because of increasing nuclear charge, which concludes in the topmost electron being more strongly leap to the nucleus.

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(C) C4O3N2H8 is the deduced formula of the molecule made from two monomers of glycine.

Of all the human amino acids, glycine has the smallest and most basic structure. The only amino acid whose center carbon is achiral has a side chain made up entirely of hydrogen atoms, and that amino acid is glycine (not a chiral carbon).

In deducing the formula of a compound:

1. Write the symbols side by side, with the basic radical written first and the acidic radical written after.

2. Add each atom's valency to the top of its symbol.

3. Subtract the valency values from their highest shared factor. Radical symbols should be ignored. Alternate the radicals' valencies.

4. To the right of the radicals, write the valency numbers that were switched. Put the radical inside brackets if it consists of a group of atoms and has more than one valency.

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Question correction:

The formula of the amino acid glycine is C2O2NH5. Deduce the formula of the molecule made from two monomers of glycine

A) the information given does not allow such a deduction

B) C4O4N2H10

C) C4O3N2H8

D) C4O2N2H6

E) C4ON2H4

The key difference between free radical and ion is that the free radicals have one or more unpaired electron, but ions have paired electrons.

What is the Paired and Unpaired Electrons?

Unpaired electrons are the ones that appear in an orbital alone, while paired electrons are the ones that appear in an orbital as pairs in an atom. So, in the orbital, paired electrons always appear as two electrons, whereas unpaired electrons always appear as a single electron. The main distinction between paired and unpaired electrons is this. Additionally, whereas unpaired electrons result in paramagnetism or ferromagnetism in atoms, paired electrons cause diamagnetism in atoms.

A change in the orbital motion of electrons caused by an applied magnetic field induces diamagnetism, a very weak form of magnetism. This magnetism is transient and only endures when an outside field is present.

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The general molecular formula for alkanes is cnh2n 2. The general molecular formula for cycloalkanes with two rings CnH2n−2.

Cycloalkanes are hydrocarbons with a ring type structure. The reason of ring formation is because they are saturated compounds. The general formula of the cycloalkanes is CnH2n where n is the number of carbon atoms.

cyclopentane, Cyclobutane, cyclohexane, and cycloheptane, cyclooctane are some example of cycloalkanes and Cyclopropane is considered one of the smallest cycloalkanes.

Cycloalkanes have a lot of uses. They are used in the medical industry for the production of drugs. These compounds are also used in hair and food industries.

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Two isotopes of rubidium occur naturally, rubidium 85 (84.91 amu) at 72.17 % and rubidium 87 (86.91 amu) at 27.83 %. The atomic mass of rubidium is 85.468 μ.

To find the atomic mas of rubidium -

Determining the average atomic mass of an element, we take the average weight of the atomic masses of the naturally occurring isotopes. This means that all the isotopes together are calculated by multiplying the atomic mass and the percentage of abundance. So we have a sum of all the different isotopes ( which is 100 % of abundance)

For naturally occurring rubidium, there are 2 isotopes.

mass of Rb-85 x abundance + mass of Rb-87 x abundance -

84.9118 x 0.7217 + 86.9092 x 0.2783 = 85.46767642 = 85.468 μ

On the periodic table, we can see for Rubidium

85.468 μ which is the average atomic mass of Rubidium and also for its two naturally occurring isotopes.

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The most appropriate answer among the option is a polypeptide with a primary sequence it contains four nonpolar neutral residues.

What is polypeptide?

A longer, unbroken, continuous peptide chain is known as a polypeptide. Peptides therefore belong to the wide chemical families of biological polymers and oligomers, along with nucleic acids, oligosaccharides, polysaccharides, and others.

A polypeptide with typically more than 50 amino acids is referred to as a protein. One or more polypeptides with a physiologically functional structure make up a protein. Proteins commonly interact with other proteins, other macromolecules like DNA or RNA, or intricate macromolecular complexes.

Amino acids that have been incorporated into peptides are called residues. A water molecule is released as a result of every amide connection.

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Florence is only able to find 0. 015 m aqueous ki/i2 on the reagent cart, so they perform a dilution by combining 10 ml of water and 10 ml of the available reagent. They now have 0. 0075 m aqueous ki/i2 which can be used at station there is no difference in the chemical composition of the solution because water was already present in the solution.

Florence is a type of flask used as an item of laboratory glassware and is named after the city Florence. here Florence flask is only able to find 0. 015 m aqueous Ki/i2 on the reagent cart they perform a dilution by combining 10 ml of water and 10 ml of the available reagent They now have 0. 0075 m aqueous Ki/i2 which can be used at station there is no difference  because water was already present in the solution water is only present on the reagent cart.

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A chlorine atom that has gained an electron and has an overall negative charge is an example of an anion. The correct option is a.

Anions are the negatively charged particles of the atom. There are two types of ions, anions, and cations. Cations are positively charged ions.

A chlorine atom has gained an electron, when atoms gain an electron, it attains negative charges. So, when a negative charge is attained, it converts into an anion. The element will be called an anion. When it donates electrons, it attains a positive charge.

Thus, the correct option is a, anion.

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The question is incomplete. Your most probably complete question is given below:

anion

cation

proton

ions.

2.50 x 10⁻³ mol naoh are present in 25.0 ml of a 0.1000 m naoh solution

Here Molarity formula is used to find moles in solution

Molarity = no of moles of solute/volume of solution

M= molarity, V = volume , n= no of moles

M=0.1000m , V=25.0ml  , n=?

M=n/v(ml)×1000

n=MV/10³ = 0.1000×25.0/10³ = 2.50 x 10⁻³ mol

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The diameter of a hydrogen atom is 1.04 × 10⁻⁷ meters.

Diameter or the atomic radius of an atom is a measure of the size of that atom. It is distance from the center of the nucleus to the outermost isolated electron of an atom.

d(H) = 1.04 × 10⁻¹⁰ m; a diameter of hydrogen atom

If a protein molecule has an overall length of 1000 times(1×10³) the diameter of a hydrogen atom, than:

d(protein) = 1.04 × 10⁻¹⁰ m × 1×10³

d(protein) = 1.04 × 10⁻⁷ m; diameter of a protein molecule

Protein is composed of amino acid linked with peptide bond.

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The mass of Calcium required to complete this reaction is 4.008 g.

In the given reaction mass of product after completion of reaction is 13.614 g that means total mass of constituents before reaction should also be 13.614.

So,

mass of Ca + mass of O₂ + mass of S = mass of CaSO4

Ca + 6.400 g + 3.206 g = 13.614 g

mass of Ca = 13.614 - 9.606 = 4.008 g

Therefore, by law of conservation of mass 4.008 g of Ca is required for the completion of the reaction.

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The molality of this solution is 0.165 m.

m(glucose) = 4.92 grams; mass of glucose

V(water) = 165.0 mL; volume of water

d(water) = 1.00 g/mL; the density of water

M(glucose) = 180 g/mol; molar mass of glucose

n(glucose) = m(glucose) / M(glucose)

moles of glucose = mass of glucose / Molar mass of glucose

n(glucose) = 4.92 g / 180 g/mol

n(glucose) = 0.027 mol

m(water) = 1.00 g/mL x 165 mL

m(water) = 165 g = 0.165 kg

molality = number of moles / mass of water

b(solution) = 0.027 mol / 0.165 kg

b(solution) = 0.165 mol/kg; molality of the solution

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The feature of object-oriented computing is an encapsulation of states. The correct option is b.

Object-oriented computing, the short form, is OOP. A computer programming paradigm known as object-oriented programming (OOP) arranges the architecture of software around data or objects rather than functions and logic.

An object is a data field with particular characteristics and behavior. It contains data and codes. It is stored in the form of a procedure. Furthermore, it is a programming paradigm.

Thus, the correct option is b. encapsulation of states.

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The reactant in excess is Al (s)

The mass of remaining surplus reactant is 8.76 g

According to question

4 moles of aluminium reacts with 3 moles of oxygen, to make 2 moles of alumina.

Molar mass Al: 26.98 g/m

Molar mass O2: 32.00 g/m

Mass / Molar mass: Moles

20 g Al / 26.98 g/m = 0.741 moles 10 g O2/32.00 g/m 0.312 moles =

Let's find out the limiting reactant and reactant in surplus by rules of three: the 4 moles of Al reacts with 3 moles of O2

0.741 moles of Al reacts with (0.741.3)/4 = 0.555 moles

Now we know that are needed 0.555 moles of O2 to consume all the Al but we only have 0.312 moles of O2.

The O2 is the limiting reactant, so the Al is the reactant in excess.

Let's make another rule of three

3 moles of O2 reacts with 4 moles of Al

0.312 of O2 reacts with (0.312 .4)/3 = 0.416

We need 0.416 moles to consume all the O2 and we have 0.741 moles of Al.

When we use 0.416 moles from 0.741 it remains 0.325

0.325 moles . 26.98 g/m = 8.76 grams

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In the experiment performed on the compost:

Variables in an experiment are factors that are under the control of the researcher and which brings about changes in the result of the experiment.

There are three types of variables in an experiment, they are;

The independent variable is the variable which affects the result of the experiment by controlling the dependent variable.

The dependent variable changes as a result of changes in the independent variable.

The constant variable is kept constant or unchanged by the researcher.

Considering the experiment performed on the compost:

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