3. Which of the following is determined by a change in velocity divided by time?
a. Speed
b. Acceleration
c. Velocity

The atomic number of an atom that has six protons, six neutrons, and six electrons is 6. And the element is carbon.

Carbon is known as a tetravalent compound.

It has four electrons in its outermost shell. It forms a covalent bond with other compounds.

The number of neutrons. = 6

Number of electrons = 6

Number of protons = 6

So the atomic number of the compound is,

The atomic number of an element = Number of protons present in its nucleus

The number of protons given in the compound is 6.

So the atomic number of the compound is also 6.

Carbon has six atomic numbers.

Therefore, the atomic number of an atom that has six protons, six neutrons, and six electrons is 6. And the element is carbon.

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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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The absolute pressure in a compressed air tank is 180 kpa. pressure in psia  is 26.10 psia

The pressure of having no matter inside a space, or a perfect vacuum called absolute pressure. it indicates how much higher your process pressure is than that of a process in vacuum, so measurements are always positive. for calculate pressure

P=(180kPa)(1 psia/6.895 kPa) = 26.10 psia

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One-half cup of black-eyed peas contains at least 100 mcg of folate per serving.

In infants and the women with poor folic acid intakes, the neural tube defects (NTDs), or failures in the closure of the neural tube are more common. For the normal formation of the spinal cord, proper closure of the neural tube is required.

Within the first month of gestation, the neural tube begins to close, often before a person realizes that she is pregnant.

Therefore, 0.4 mg of folic acid should be taken every day, while consuming dietary sources of folate, i.e. intake of folate rich diet/meal by all people who are capable of becoming pregnant.

One-half cup of black-eyed peas contains at least 100 mcg of folate. Ready-to-eat breakfast cereal contains 200 mcg of folate and a slice of bread contains 20 mcg, and not 100 mcg of folate. One-half cup of broccoli and a cup of pasta contain 50 mcg, not 100 mcg of folate.

Complete question is-

Which food contains at least 100 mcg of folate per serving? one, some, or all responses may be correct.

1. Bread

2. Broccoli

3. Cooked pasta

4. Black-eyed pasta

5. Ready-to-eat breakfast cereal

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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 ability of water to function as a versatile solvent arise from the structure of water molecules are because:

Water molecules form hydrogen bonds with atoms that are part of polar covalent bonds other molecules

Water's versatility as solvent arises from the polar covalent bonds of water molecules.

Hydrogen bond is an electrostatic attraction between two polar groups that occurs when a hydrogen atom (H), covalently bound to a highly electronegative atom such as flourine (F), oxygen (O) and nitrogen (N) atoms.

In water, atoms of hydrogen (H) and oxygen (O) are connected by polar covalent bonds.

Covalent bond is bond between nonmetals. Hydrogen and oxygen are nonmetals.

Solvation is the interaction of solvent (water) with molecules or ions (for example K⁺ and I⁻) in a solute.

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His results showed that matter included particles much smaller than the atom.

J. J. Tomson concluded that atoms are divisible and that the corpuscles are their building blocks.

Atoms are made up of smaller particles.

J. J. Thomson discovered the electron ( the negative charges of the atom) in 1897.

His "plum pudding" model (1904) suggested: the electrons are embedded in the positive charge and evenly distributed throughout the entire atom.

With this model, he abandoned his earlier hypothesis that the atom was composed of immaterial vortices.

Later, scientist Rutherford demonstrate that J.J Thompson's Plum Pudding model was not accurate.

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Hg is a heterogeneous mixture, not a homogeneous mixture.

In chemistry, a mixture is a substance consisting of two or more different chemical substances that are not chemically combined. A mixture is two or more substances physically combined in which they retain their identity and are mixed in the form of solutions, suspensions, and colloids.

A mixture is formed when two or more different substances are physically combined and can be separated into their original substances. A chemical reaction occurs when two or more substances combine to form a new substance that cannot be converted back into the original substance.

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The correct answer is 0.15.

We are aware that there is 0.05 mol of an unidentified hydrocarbon we will refer to as "X" and that its burning produces 6.6 g of carbon dioxide and 3.6 g of water.

These quantities might be converted to moles by applying the following formula:

amount= mass/ relative atomic mass

Thus, the following equation may be written for H2O: moles = 3.6 / 18 = 0.2 and for CO2: moles = 6.6 / 44 = 0.15.

0.05X + x'O2 = 0.15CO2 + 0.2H2O

This may be made simpler by dividing through by 0.05 (this step is likely to be the most helpful to you), resulting in:

1 x + x O2 = 3 co2 + 4 H2O

The hydrocarbon must have been the source of all the carbon in the carbon dioxide and all the hydrogen in the water.

Accordingly, 4 x 2 = 8 moles of H and 3 x 1 = 3 moles of C.

There are 3/1 = 3 Cs and 8/1 = 8 Hs in one X molecule.

This clearly identifies C3H8 or propane as the hydrocarbon X (dividing by 1 seems unnecessary, but it illustrates the process to use if there were more than one mol of X in the first equation).

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When you purchase 0.500 gallon of milk, 7.89mL of milk are there in the container

Unit of liquid capacity equal to four quarts or 231 cubic inches or 3.785 liters called gallon. here 1 gallon = 3.785 l and you purchase 0.500 gallon so multiply the no of cubit feet by 7.47 then and here

volume is 8 then 8×7.47=59.76 so  

1 gallon = 3.785=59.76÷3.785=15.78

15.78×0.0500gallon=7.89ml

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Answer:

the potassium permanganate formula is KMnO₄

Explanation:

Potassium permanganate, also known as permanganate of potash or Condy's crystals, is a chemical compound consisting of two ions: a potassium ion and a permanganate ion.

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The formula of potassium permagnet is KMnO₄, Therefore there is only one potassium ion is present in potassium permagnet.

An atom with a negative electrical charge is known as an ion. Generally, the charge of an electron is considered to be negative,this charge is equal to and equivalent to the charged of a proton, which is thought to be positive.

When an atom's number of protons and electrons is out of balance, ions are created. As a result, an atom that has acquired or lost one or more electrons and thus has a positive or negative charge is said to be an ion.

Potassium permanganate is made up of one potassium atom ( K ), one manganese atom ( Mn ), and four oxygen atoms, according to its chemical formula ( O ).

Therefore there is only one potassium ion is present in potassium permagnet.

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The 14.1 ml solution has a density of 2.1365 g/ml.

Density is defined as the ratio between the mass of a substance and the volume it occupies. Denoted by ρ, density is mass per unit volume and the formula is given below:

ρ =  mass / volume

To solve for the density of a mixture or solution of two substances with different densities, the mass and volume of each substance must be known, as:

ρ mix = (M1 + M2) / (V1 + V2)

The volume and densities of the two given substances are known and can be used to solve for the unknown mass of each substance.

M1 = ρ x V1

M1 = 1.492 g/ml x 7.60 ml

M1 = 11.3392 g

M2 = ρ x V2

M2 = 2.890 g/ml x 6.50 ml

M1 = 18.785 g

Solving for the density of the mixture,

ρ mix = (M1 + M2) / (V1 + V2)

ρ mix = (11.3392 g + 18.785 g) / (7.60 ml + 6.50 ml)

ρ mix = 30.1242 g / 14.1 ml

ρ mix = 2.1365 g/ml

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The reaction that demonstrates a chemical change is iron (Fe) reacting to water((H,O)) and oxygen(O) to form iron oxide(Fe2Og). That is option B.

A chemical change is defined as the change that occurs when two substances reacts or combines to form an entirely new product.

The following are the features that shows that a chemical change has taken place. They include:

When the above signs are seems there is every reason to accept the fact that a chemical change has occurred in the chemical reaction that took place.

From the chosen option, the reactants and product of the chemical reaction are:

Iron (Fe) + water (H2O) --> iron oxide(Fe2Og)

This reaction is a chemical reaction as the product formed leads to a colour change known as rust.

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Answer:

Carboxylic acid group

Explanation:

Carboxylic acid and amine groups form the basis of an amino acid.  One group reacts with the other group on a neighboring amino acid to form the peptide bond, with the release of a water molecule.

The mass of an object with a density of 1.35 g/ml & a volume of 24 ml is 32.4 g/ml.

Mass is the quantity of matter in a physical body.

The product of the molar mass of the compound and the moles of the substance are defined as mass.

Density is the mass per unit volume. Volume is the space taken by an object. Density, mass, and volume are interrelated to each other.

Given, that the density is 1.35 g/ml

The volume is 24 ml

The formula is

mass = volume x density

mass = 24 x 1.35 =  32.4

Thus, the mass of the object is 32.4 g/ml.

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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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If ADP (two phosphates) were hydrolyzed to AMP, how would you expect this reaction to compare with the hydrolysis of ATP to AMP?

ADP and ATP are both hydrolyzed to give AMP, the only difference remains in the side product formed which is pyrophosphate for ATP hydrolysis and inorganic phosphate for ADP hydrolysis.

What is ATP hydrolysis?

Adenosine triphosphate (ATP) contains highly energetic phosphoanhydride bonds that, when broken, such as occurs in muscles, release chemical energy through a catabolic reaction process called ATP hydrolysis. Adenosine diphosphate (ADP) and an inorganic phosphate are the end result (Pi). Adenosine monophosphate (AMP), energy, and another inorganic phosphate can all be produced by further hydrolyzing ADP (Pi). The final step in the energy chain from food or sunlight to useful work like muscle contraction, the creation of electrochemical gradients across membranes, and life-sustaining biosynthetic processes is ATP hydrolysis.

ATP + H 2 O → AMP + Pyrophosphate(PP)ADP + H 2 O → AMP + Inorganic Phosphate(Pi)

Thus, ADP and ATP are both hydrolyzed to give AMP, the only difference remains in the side product formed which is pyrophosphate for ATP hydrolysis and inorganic phosphate for ADP hydrolysis.

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It is impossible for an element to have an atomic number of 110.5 because atoms of an element all have the same whole number of protons. Thus, option C is correct.

The atomic number is the number of protons in the nucleus of an atom. The number of protons defines the identity of an element. The atomic number of an atom is equal to the number of protons in the nucleus of an atom or the number of electrons in an electrically neutral atom.

For example, in a sodium atom, there are 11 electrons and 11 protons.

Thus, the atomic number of Na atom = number of electrons = number of protons is equal to 11.

The atomic number is based only on the number of protons in the nucleus of an atom. Since this is a count of whole numbers, it cannot be a decimal. It's either element 110 or 111, not 110.5.

There is no half proton in the atom, hence we can not have an atomic number of 110.5.

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To ensure that the 9-Fluorenone was totally dry, it had to be washed with methylene chloride. To make sure that methylene chloride is present in a pure solution, sodium sulfate binds to water and precipitates.

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Answer:

Fusion.

Explanation: fusion is a nuclear reaction in which smaller atoms fuse together to form heavier elements. This describes the fusion of hydrogen into helium.

The binder found in high-fiber foods that inhibits the absorption of iron and zinc is oxalic acid Choose raw fruits and vegetables instead of juice, and consume the peels. Alternative fiber sources include whole buckwheat, whole wheat couscous, quinoa, bulgur, wheat germ, chia water seeds, hemp seeds, lentil pasta, and edamame pasta.

Popcorn is a complete grain. Serve it low-fat and without butter for a healthy snack option. It is a white crystalline substance that dissolves colorlessly in water. It got its name from the fact that early researchers obtained oxalic acid from blooming plants of the genus Oxalis, sometimes known as wood-sorrels.

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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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Most combustibles, when burned with just the stoichiometric amount of air, under conditions where no heat is lost, will produce flames between the temperature range of 2100-2300 K.

Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives off heat. The original substance is referred to as the fuel and the oxygen's source as the oxidizer. Although it is typically a liquid for airplane propulsion, the fuel can be a solid, liquid, or gas. However, combustion is a chemical reaction between substances, usually including oxygen, and usually accompanied by the generation of heat and light in the form of flame.

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According to the bohr model, the energy change in joules that occurs E=−1.36×10∧−19J, when an electron falls from the n = 4 to the n = 2 energy level in a hydrogen atom.

The Bohr model, also known as the Rutherford-Bohr model, was first proposed by Niels Bohr and Ernest Rutherford in 1913 and describes an atomic system with an orbiting system of electrons and a small, dense nucleus that is similar to the Solar System in structure but is attracted by electrostatic forces rather than gravity.

1) The orbits of the electrons surrounding the nucleus are circular and have a constant energy.

2) The electron only rotates in orbits with angular momentum greater than or equal to nhi/2π³.

Only when an electron transitions from one orbit to another can energy become realised or absorbed in the form of a photon.

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The average mass of a manganese atom is 54.94 amu or  9.12 x 10⁻²⁶ kg.

One unified atomic mass unit is approximately the mass of one nucleon (proton or neutron).

The unified atomic mass unit (amu) is a standard unit of atom mass.

One unified atomic mass unit is approximately the mass of the one nucleon (1.66·10⁻²⁷ kg)

Ar(Mn) = 54.94 amu; a relative atomic mass of manganese atom

m(Mn) = Ar(Mn) x 1.66·10⁻²⁷ kg

m(Mn) = 54.94 x 1.66·10⁻²⁷ kg

m(Mn) = 91.2 x 1.66·10⁻²⁷ kg

m(Mn) = 9.12 x 10⁻²⁶ kg; the average mass of a manganese atom

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The chemical shift of a given proton is decided specifically with the aid of interactions with the nearby electrons. The most necessary thing to recognize is that when electrons are subjected to an external magnetic field, they structure their own small prompted magnetic fields in opposition to the exterior field.

Consider the methane molecule ( CH4 ) in which the four equal protons have a chemical shift of 0.23 ppm (this is a price we can look up in any chemistry reference source). The valence electrons around the methyl carbon, when subjected to B0, generate their own very small triggered magnetic area that opposes  B0 . This induced field, to a small however full-size degree, shields the close by protons from experiencing the full force of  B0 , an impact regarded as local diamagnetic shielding. In different words, the methane protons do now not quite journey the full force of  B0  - what they journey is known as  Beff , or the high-quality field, which is slightly weaker than  B0  due to the have an effect on of the close by electrons.

In nuclear magnetic resonance (NMR) spectroscopy, the chemical shift is the resonant frequency of an atomic nucleus relative to a preferred in a magnetic field. Often the position and range of chemical shifts are diagnostic of the shape of a molecule.

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When NAD becomes NADH, it is being reduced and gaining chemical energy.

Nicotinamide adenine dinucleotide (NAD), a coenzyme, can exist in two forms, NAD⁺ (oxidized) and NADH (reduced form).

Electrons and protons released in catabolism reactions are attached to NAD⁺. The conversion of NAD⁺ to NADH is important reaction for production of ATP during the cellular respiration.

Reduction is lowering oxidation number because element, ion or compound gain electrons.

Chemical equation for reaction of reduction of NAD⁺ (see picture below):

NAD⁺ + 2e⁻ + H⁺ → NADH

Nicotinamide adenine dinucleotide (NAD) is made of two nucleosides joined by pyrophosphate.

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The peptide bond is broken by the hydrolysis of water. The hydrogen ion of water goes to the -NH end (shown to the right of bond C) and the hydroxyl Ion of water goes to the -CO ends (shown to the left of bond C), resulting in the breakdown of peptide Bond and formation of individual amino acid.

The reaction of water with another compound forms two or more products. Some examples of hydrolysis include dissolving salts of weak acids or weak bases in water or dissolving sulfuric acid in water to form hydronium and bisulfate compounds.

The difference between hydration and hydrolysis is that hydrolysis is the process of breaking a bond with water whereas hydration is defined as an electrophilic addition reaction without breaking the original molecule. During hydration, water molecules are added to the substance. A chemical decomposition process that involves breaking bonds and adding hydrogen cations and hydroxide anions of water.

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The mass of NaCl produced is 0.117 g.

The pH of a solution is what tells us if the solution is acidic or basic. The solution is acidic if the pH of the solution is less than 7.

1) pH = - log(3.5 x 10^-5 M)

= 4.45

Thus the solution is acidic.

2) We can see that the concentration as given is the concentration of OH^-

[OH ] = 4.0 x 10^-3 M

pOH = -log (4.0 x 10^-3 M)

pOH = 2.39

pH = 14 -  2.39

pH = 11.61

The equation of the reaction is; [tex]NaOH + HCl ----- > NaCl + H2O[/tex]

Number of moles of NaOH =  0.40 M * 10/1000 = 0.004 moles

Number of moles of HCl = 0.20 M  * 10/1000 = 0.002 moles

We can see that HCl is the limiting reactant

Mass of NaCl produced ;

0.002 moles * 58.5 g/mol = 0.117 g

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