Several properties of water are shown. Classify each property as a physical property or a chemical property.

-can be split into hydrogen and oxygen
-is liquid at room temperature
-has a density of 1.0 g/cm³
-reacts with certain metals

ASAP

The terms is used to describe a solution that results when both the salute and solvent are called alloys

Alllys simply refers to mixture of a solid metal made by combining two or more metallic elements.

There exist alloys of

In conclusion, the terms is used to describe a solution that results when both the salute and solvent are called alloys

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Answer:

Al has a 3+ charge, and SO4 has a 2- charge. So, it takes 3 of the SO4 anions to balance 2 of the Al cations. So, you get Al2(SO4)3

The major product formed will be : 2-aminophenyl ethyl ketone

The NO₂ group (-nitro group) on reduction will form a NH₂ group (-amino group).

The first law of thermodynamics with pressure volume equation is written as E = Q - PΔV.

The first law of thermodynamics states that energy cannot be created or destroyed, but it can be transformed from one form to another.

It also states that the internal energy (E) is equal to the difference of the heat transfer (Q) into a system and the work (W) done by the system.

E = Q - W

The first law of thermodynamics with pressure volume equation is given as;

W = PΔV

E = Q - PΔV

Thus, the first law of thermodynamics with pressure volume equation is written as E = Q - PΔV.

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Answer:

1.44 g

Explanation:

1. get number of nitrogen atoms in 9.79 grams of nitrogen

1 mole of Nitrogen is 6.022 x 10^23 atoms N which is = 14.01g N

2.

if 6.022 x 10^23 atoms of Nitrogen is 14

then x atoms  of Nitrogen is 9.79

3.

6.022 x 10^23/ x = 14/9.79 ->

x = 8.431 x 10^24 / 9.79 =

8.61799714478 x 10^23

4.

8.61799714478 x 10^23 atoms of N

6.022 x 1023 atoms of H have a mass of 1.008g, so

8.61799714478 x 10^23 atoms of H have a mass of (1.008/6.022 x 1023) x 8.61799714478 x 10^23) = 1.44250051072175g

1.44 g

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Enslaved African is best described as the condition which involved transporting people against their will to work on large farms without pay.

This is referred to a situation in which an individual is owned by another. Slaves were moved from Africa against their will to work on large farms.

They weren't given any pay and worked under hard conditions thereby making option B the correct choice.

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33.33 grams of CH4 would be formed from 25 g C.

C + 2H2 → CH4

from given reaction we can say that ,

2 moles of hydrogen is required for 1 mole of carbon and these will react to form 1 mole of methane.

atomic mass of Carbon = 12 gm

Molecular mass of H2 = 2(H)

                                  = 2(1)

                                  =2gm

moles = molecular mass / given mass

for C,

if 12 gm = 1 mole

then 25 gm = ? mole

           =2.083 moles

1 mole of C will produce 1 moles of CH4

so, 2.083 moles of C also will produce 2.083 moles moles of CH4

molecular weight of methane= C+4(H)

                                             = 12+4(1)

                                             = 16 gm

amount of methane produced= moles × molecular mass

                                              =2.083× 16

                                              = 33.33 gm

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The molecule is water. Molecular formula of water is H₂O. Molecular weight of water is 18 g. The percentage composition of hydrogen and oxygen in water is 11.11 % and 88.89 %. Intermolecular force in water is dipole-induced dipole and London dispersion.

Name of the molecule is Water. Molecular formula of the compound is H₂O.

Molecular mass of H₂O = 2 × Atomic weight of H + Atomic weight of O

                                       = 2 × 1 + 16

                                       = 2 + 16

                                       = 18

The water molecule is Covalent because hydrogen atoms share electrons with the oxygen atom.

Percentage composition = [tex]\frac{\text{Mass of element}}{\text{Molar Mass}}[/tex]

Now,

Molar mass of Water = 18

Percentage composition of hydrogen = [tex]\frac{2}{18} \times 100[/tex]

                                                               = 11.11 %

Percentage composition of Oxygen = [tex]\frac{16}{18} \times 100[/tex]

                                                            = 88.89 %

In water molecule dipole-induced dipole and London dispersion forces are present because water has H-bonds.

The given molecule is water. Water is important for human body to keep a normal temperature. It carries nutrients. It protects our body organs and tissues. The function of water is to serves a s a lubricant. It helps to prevent constipation. It makes up Saliva.

Thus from the above conclusion we can say that The molecule is water. Molecular formula of water is H₂O. Molecular weight of water is 18 g. The percentage composition of hydrogen and oxygen in water is 11.11 % and 88.89 %. Intermolecular force in water is dipole-induced dipole and London dispersion.

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Disclaimer: The question was given incomplete on the portal. Here is the complete question.

Questions: Choose one molecule that is vital to the human body. Provide the following information: Name of the molecule

Now, provide the following information: Molecular formula

Now, provide the following information about your chosen molecule: Molecular mass

Now, provide the following information about your chosen molecule: The type of molecule (covalent or ionic)

Now, provide the following information about your chosen molecule: Percent composition of each element

Now, provide the following information about your chosen molecule: Intermolecular forces within the molecular

Now, provide the following information about your chosen molecule: Describe why the molecule is important and its function within the human body.

Mass of liquid reactant A is 11g.

as we know that,

reactant = product

from conservation of mass

so, liquid reactant A + liquid reactant B = liquid product + solid product

substituting the values, we get,

liquid reactant A + 9 = 8 + 12

liquid reactant A + 9 = 20

liquid reactant A = 20 - 9

liquid reactant A = 11g

Hence, mass of the liquid reactant A is 11g.

what is a reactant ?

A reagent, also known as an analytical reagent, is a substance or compound that is added to a system in chemistry to bring about a chemical reaction or check to see whether one happens. Although the terms "reagent" and "reactant" are frequently used synonymously, "reactant" refers to a material that is consumed during a chemical reaction.

Mass of liquid reactant A is 11g.

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Answer: PINK

Explanation:

The oxidation number of Mn is 0. Details about oxidation number can be found below.

Oxidation number is the hypothetical charge of an atom within a molecule.

However, when an atom exists independently as an element, the oxidation number of such element is 0.

The oxidation number is assigned to an atom in a element/compound. It can either be +, -, or 0 and it tells us if electrons are lost or gained.

Therefore, according to this question, the oxidation number of Mn is 0.

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Answer:

At Anode: oxidation occurs i.e loss of electrons

At cathode: reduction occurs i.e gain of electrons

OPTION 1 is the correct answer

When traveling through a smoke-filled area, a person must be able to have distance of at least 4 feet in order to safely reach a fire exit. That is option C.

Smoke-filled area is an enclosed area that is filled with smoke gas that is usually made up of carbon monoxide.

The smoke-filled area is usually caused by

When there is smoke-filled area die to fire out break, there are some guidelines to follow to safely reach the fire exit early enough.

The importance of these guidelines include the following:

The affected individual should get down and crawl while taking short breath through the nose because cleaner air is nearest to the floor.

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For each pair of molecules given in the table below, the correct relationships are identified as follows.

A molecule is a bonded collection of atoms that represents the smallest fundamental unit of a chemical compound that may participate in a chemical process.

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From the calculation, the concentration of the oxonium ions is 1 * 10^-6 M

The term concentration refers to the amount of substances present in the solution. There are several units that can be used to show the concertation of a substances such as moles/liter, gram per liter, parts per billion, parts per billion, percentage etc.

Now we know that water is composed of the hydrogen and the hydroxide ions and the product of the both is generally known as the ion product of water and have a value of 1 * 10^-14.

If that be the case, we are in order to write the expression;

[H3O+]  [OH-] = 1 * 10^-14

[H3O+] = 1 * 10^-14/ [OH-]

[H3O+] = 1 * 10^-14/ 1 x 10^ -8

[H3O+] = 1 * 10^-6 M

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1.205 × 10²³ atoms of oxygen will be present in 7.51 grams of glycine with formula C₂H5O2N. Details about number of atoms can be found below.

How to calculate number of atoms?

The number of atoms of a substance can be calculated by multiplying the number of moles of the substance by Avogadro's number.

However, the number of moles of oxygen in glycine can be calculated using the following expression:

Molar mass of C₂H5O2N = 75.07g/mol

Mass of oxygen in glycine = 32g/mol

Hence; 32/75.07 × 7.51 = 3.2grams of oxygen in glycine

Moles of oxygen = 3.2g ÷ 16g/mol = 0.2moles

Number of atoms of oxygen = 0.2 × 6.02 × 10²³ = 1.205 × 10²³ atoms

Therefore, 1.205 × 10²³ atoms of oxygen will be present in 7.51 grams of glycine with formula C₂H5O2N.

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If U-235 decays into Cs-135 and 4 neutrons, the other nuclide that will be produced is Rb-96 (option D).

A radioactive decay is the process by which an unstable large nuclei emit subatomic particles and disintegrate into one or more smaller nuclei.

According to this question, a radioactive material Uranium- 235 undergoes radioactive decay into Cs- 135 and 4 neutrons (1/0n).

This means that the mass of the products we have is 135 + 4 = 139.

The mass of the nuclide left must be 235 - 139 = 96, hence, the other nuclide that will be produced is Rb-96.

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The functional group would be the aromatic ring.

Functional groups in organic compounds are a group of atoms that gives the compound a distinctive chemical property or properties.

The major functional groups include Hydroxyl, sulfhydryl, carbonyl, carboxyl, amino, and phosphate groups. Aromatic rings are also considered a functional group.

Functional groups are made up of atoms of elements that are covalently linked to each other. The functional group as a whole is also covalently linked to the rest of the molecule.

Functional groups influence molecules to behave in a particular way when it comes to chemical reactions.

Looking at the image (see the attached), none of the side chains qualify as functional groups except the mother chain which is an aromatic ring.

Thus, the only functional group remains the aromatic ring.

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The rate constant of the second order reaction is 0.137 M-1s-1.

For the second order reaction we can write;

1/[A] = kt + 1/[A]o

[A]o = initial concentration

[A] = final concentration

k = rate constant

t = time

Now;

1/0.319 = 13.5k + 1/ 0.740

1/0.319 - 1/0.740 = 13.5k

3.13 - 1.35 = 13k

k = 3.13 - 1.35/13

k = 0.137 M-1s-1

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Answer:

D.) Zn + H₂SO₄ ----> ZnSO₄ + H₂

Explanation:

Single-Replacement Reaction: a reaction in which an element in a compound is swapped with another element

    ex.) Zn + H₂SO₄ ----> ZnSO₄ + H₂

Double-Replacement Reaction: a reaction in which a cation in one compound is swapped with a cation in another

    ex.) Ba(OH)₂ + H₂SO₄ ----> BaSO₄ + 2 H₂O

Synthesis Reaction: a reaction in which two or more elements/compounds combine to form a new molecule

    ex.) 2 Mg + O₂ ----> 2 MgO

    ex.) H₂O + CO₂ ----> H₂CO₃

The gas is bromine. (This is a fact)

Answer:

Explanation:

yogurt is a colloid because of the milk/dairy in it. yogurt is a complex colloid.

As yogurt includes living bacterial cultures, proteins, lipids, and milk solids in addition to water, yoghurt is a colloid.

Yoghurt is a colloid because it contains living bacterial cultures, proteins, lipids, and milk solids in addition to water. A colloid forms a homogenous mixture rather than settling or separating over time because the particles or components are uniformly distributed throughout the medium. A water-in-oil emulsion, specifically yoghurt is regarded as an emulsion colloid. This implies that water droplets are evenly distributed across an ongoing fat or oil matrix. The matrix of yoghurt is made up of milk solids, proteins, and lipids, and the water phase is present as droplets. Lactic acid is produced when bacteria in the bacterial culture, including Lactobacillus bulgaricus and Streptococcus thermophilus, ferment milk's lactose.

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Molecular mass of  9.3 x 10^ 24 molecules of glucose  = 1675.6 x 10^ 24

It is given that the mass of glucose is 180.18 g/mol
so if we have to calculate the mass of 9.3x 10^ 24 molecules of glucose
we will apply a simple unitary method i.e,

9.3 x 10^ 24 *  180.18 g/mol = 1675.67 x 10^ 24
To calculate the molecular mass of a molecule, multiply the subscript (number of atoms) by the atomic mass of each element in the molecule and add those masses together.
Remember that - To determine the compound's molecular mass in grams per mole, use the molecular formula.
Divide the supplied mass by the molar mass of the chemical to convert it to moles.
By dividing the number of moles by Avogadro's number, you may convert from moles to molecules.

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Answer:

See below

Explanation:

H2 S     shows that each mole of H2S has two moles of H in it

  so 10 moles of H2S would have 20 moles of H

Each mole is Avagadro's Number of atoms

   20 moles  *   6.022 x10^23  atoms/mole = 120.44 x 10^23 toms of H

H2S has one mole of S   for each mole of H2S

     there are then 10 moles of S

       10 * 6.022 x 10^23 = 60.22 x 10^23 atoms of S

Answer:

-43.3 °C

Explanation:

To find the temperature, you need to use the Ideal Gas Law equation. The equation looks like this:

PV = nRT

In this formula,

-----> P = pressure (atm)

-----> V = volume (L)

-----> n = moles

-----> R = Ideal Gas Law constant (0.08206 atm*L/mol*K)

-----> T = temperature (K)

By plugging the given values into the equation and simplifying, you can find the temperature. After you get a temperature, you need to convert it into Celsius.

P = 2.88 atm                              R = 0.08206 atm*L/mol*K

V = 3.76 L                                   T = ? K

n = 0.574 moles

PV = nRT

(2.88 atm)(3.76 L) = (0.574 moles)(0.08206 atm*L/mol*K)T

10.8288 = (0.04710244)T

230. K = T

Kelvin - 273.15 = Celsius

230 K - 273.15 = -43.3 °C

The approximate degree of dissociation of a 0.35 M solution of lactic acid is 4,87%

The degree of dissociation is the quantity used to express the strength of a base, that is, its ability to conduct electric current, which depends on the amount of ions released in the dissociation.

The degree of dissociation (α) is another way of determining the strength of a base. It indicates the fatty acids that were released from a base when it dissociates in water.

With that being said, C stands for concentration and α is the the degree of dissociation.

Latic Acid can be written as  C3H6O3

[tex]CH3Ch(OH)CO2H < -- > H^{+} + CH3CH(OH)CO2^{-}[/tex]

[tex]Ka = \frac{[H^{+}] [CH3CH(OH)CO2^{-}] }{CH#CH(OH)CO2H} = \frac{C^{2} \alpha^{2} }{C(1-\alpha )} = \frac{C\alpha ^{2} }{(1-\alpha )}[/tex]

As α is too small (1-α) can be neglected.

[tex]Ka = C\alpha ^{2} \\\\\\alpha = \sqrt[]{\frac{Ka}{C} }[/tex]

[tex]Ka = 10^{-3,08} = 8,32 .10^{-4} .10^{-4} = 0,35[/tex]

[tex]\alpha = \sqrt{\frac{ka}{C} } \\\\\alpha = \sqrt{\frac{8,32.10^{-4} }{0,35} } = 0,0487[/tex]

In this case, is possible to see that  approximate degree of dissociation of a 0.35 M solution of lactic acid is 4,87%

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Answer:

36.4 atm

Explanation:

To find the pressure, you need to use the Ideal Gas Law. The equation looks like this:

PV = nRT

In this equation,

-----> P = pressure (atm)

-----> V = volume (L)

-----> n = moles

-----> R = constant (0.0821 L*atm/mol*K)

-----> T = temperature (K)

Before you can plug the given values into the equation, you first need to convert Celsius to Kelvin.

P = ? atm                         R = 0.0821 L*atm/mol*K

V = 5.00 L                       T = 393 °C + 273.15 = 312.45 K

n = 7.10 moles

PV = nRT

P(5.00 L) = (7.10 moles)(0.0821 L*atm/mol*K)(312.45 K)

P(5.00 L) = 182.130

P = 36.4 atm

The correct chemical structure that corresponds to 1,1,1-trifluoroethane is (a).

What is  1,1,1-trifluoroethane?

A chemical structure is a spatial arrangement of atoms in a molecule. It determines the molecular geometry and when necessary the electronic chemistry as well .1,1,1-Trifluoroethane or simply known as trifluoroethane is Hydrofluorocarbon (HFC) compound that is colourless and highly inflammable gas with ether like odour. One method of preparation of 1,1,1-Trifluoroethane is by fluorination of 1-chloro-1,1-difluoroethane in the presence of hydrofluoric acid.  The chemical formula for 1,1,1-Trifluoroethane is [tex]C__{2} } H_{3} F_{3}[/tex]. The high stability of it's chemical structure because of being heavier than air makes it a greenhouse gas with high infrared absorbent power. It can be used as a propellant or refrigerant and in cleaning of electrical equipments.

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Rutherford’s, Bohr’s, and the quantum models say that electrons behave as particles,  electron is negatively charged and electrons behave both particles and wave respectively.

Bohr model states that electrons behave as particles, Rutherford's model proposed that the negatively charged electrons surround the nucleus of an atom whereas quantum model explains that the electron has both particle and wave behavior.

So we can conclude that Rutherford’s, Bohr’s, and the quantum models say that electrons behave as particles,  electron is negatively charged and electrons behave both particles and wave respectively.

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Answer:

0.00152 km

Explanation:

The easiest way to complete the conversion is by (1) converting cm to m and then (2) converting m to km. It is important to arrange the conversions in a way that allows for the cancellation of units.

1,000 m = 1 km

100 cm = 1 m

152 cm             1 m                 1 km
-------------  x  --------------  x  ----------------  =  0.00152 km
                      100 cm          1,000 m

[tex]\large\displaystyle\text{$\begin{gathered}\sf So \to \ \ 152\not{cm}*\frac{1 \ km}{100,000\not{cm}}=0.00152 \ km \end{gathered}$}[/tex]

Answer:Therefore, the measurement of the object in km is: 0.00152 Kilometers.

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