What color is this? I think it’s blue or gray, but I’m color blind.

The percentage by mass of sodium in a 25 g sample of sodium chloride =39.92%

A chemical compound is made up of two or more elements which are chemically combined together.

For example sodium chloride which contains sodium and chloride are chemically combined together to form sodium chloride as a chemical compound.

The first compound of sodium chloride= 5g

The percentage that is sodium= 39.34%

The second compound of sodium chloride= 25g

The percentage that is sodium= x%

That is = 5g = 39.34%

Therefore quality of sodium in grams;

= 39.34/100× 5

= 0.3934× 5

= 1.967g

Therefore if 5g of NaCl contains 1.967g of Na

25g of NaCl will contain xg

Make xg the subject of formula,

= 25×1.978/5

= 49.45/5

= 9.98g of sodium.

To conver 9.98g to %;

=9.98/25 × 100/1

= 0.3992×100/1

= 39.92% of sodium.

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The following factors can affect the solubility of a substance is temperature and pressure

Solubility is the maximum amount of substances that will dissolve in a given amount of solvent at specific temperature and solubility is the characteristics property of specific solute and solvent combination and different substances has greatly different solubility's and there are two direct factor that affect the solubility and they are temperature and pressure and temperature affect solubility of both solid and gases but pressure only affect the solubility of gases

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The equation representing the heat of reaction in letters is ΔH = q = [tex]cp_{sp}[/tex] x m x (ΔT)

Heat of reaction is also known as Enthalpy of the reaction. It is a measurement used in thermodynamics energy that was produced or released in a reaction. ΔH represents change in heat or enthalpy

Heat of reaction, ΔH = q = [tex]cp_{sp}[/tex] x m x (ΔT)

where,

ΔH and q represents heat of reaction

m represents the mass of the reaction medium

[tex]cp_{sp}[/tex] represents the specific heat capacity

ΔT represents the difference in temperature of the medium

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Kinds of intermolecular forces exist between acetone molecules is Hydrogen bond.

A. CH3 -C-CH3.

B. The molecular is nonpolar.

C. Dipole-dipole interactions.

D. CH3-CH₂-OH → 1-proposal if dissolves in water form the strong Hydrogen bonding Acetone with water when Compare with 1-prop and have more strong Hydrogen bonding due to its bending 1-propenal has more boiler point.

Molecules with oxygen atoms nitrogen atoms or ionizable groups -CO2H and -SO3H tend to be polar. A non-polar molecule is a molecule that does not have regions of positive and negative charge. Ethane is an example of a non-polar substance. A bond is considered nonpolar if the electronegativity difference is less than about 0.4.

When things are different at both ends we call them polar. Also, some molecules have positive and negative ends, and when they are present, we call them polar. Otherwise, it is called non-polar. Polar things can attract or repel each other. Opposite charges attract and charges repel.

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Covalent bonds and ionic bonds differ as follows: ionic bonds form by the transfer of electrons. Covalent bonds form by sharing electrons. In ionic bonding, electrons are completely transferred from one atom to

another. In the process of either losing or gaining negatively charged electrons, the

reacting atoms form ions. Ions that have a positive charge are called cations and the ones that have a negative charge are called anions. On the other hand, covalent bonds can be formed by any equal or unequal sharing of electrons. The substances formed by ionic bonds are called compounds and those formed by covalent bonds are referred to as molecules (option 2).

Ionic bonds are a type of chemical bond where two atoms or molecules are connected to each other by electrostatic attraction.

On the other hand, a covalent bond is a type of chemical bond where two atoms are connected to each other by the sharing of two or more electrons.

Ionic bonds occur between metals, which lose electrons, and nonmetals, which gain electrons. Ions with opposite charges will attract one another creating an ionic bond.

Also, covalent bonds form when two atoms of similar charges share electron pairs.

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A certain gas is present in a container obeys Boyles law.

The Boyles law stated that if the temperature and amount of gas remain constant within a closed system, the absolute pressure exerted by a given mass of an ideal gas is inversely proportional to the volume it fills.

Boyles law can be expressed as

P1V1 = P2V2

As per Boyles law P= k / V

So, Pi = ki / Vi

Ki = Pi Vi

   = 2.0 x 11.0 = 22.0 atm-L

Thus for Kf

Kf = Pf Vf

   = 4.0 x 5.5 = 22.0 atm-L

Thus Ki = Kf

This signify that it obeys Boyles law.

Thus, a certain gas is present in a container obeys Boyles law.

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An object’s displacement is the distance and direction of the object’s change in position.

Displacement in physics is the quantity which denotes distance with a directional component.

Displacement and distance are two inter-related terminologies that are often misused, however, they differ being that displacement is a vector quantity while distance is a scalar quantity.

This means that displacement has direction and magnitude, hence, can be defined as the distance and direction of an object’s change in position.

Displacement is denoted by ∆x and is calculated by dividing the change in position by time taken.

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Taking into account the definition of dilution, after two dilutions the final concentration is 0.1923 M.

When it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution. This is accomplished by simply adding more solvent to the solution at the same amount of solute.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume of the solution increases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where

In this case, you know for the first dilution:

Replacing in the definition of dilution:

1.50 M× 68 mL= Cf× 208 mL

Solving:

(1.50 M× 68 mL)÷ 208 mL= Cf

0.49 M= Cf

Now, in a second dilution you take a sample of 104 mL of this diluted solution and add another 161 mL of water. The final volume of the solution will be

Vfinal= 104 mL + 161 mL= 265 mL

The concentration of the 104 mL sample is equal to the concentration of the first diluted solution, this is 0.49 M. Therefore, the concentration of the final solution will be:

0.49 M× 104 mL= Cf× 265 mL

Solving:

(0.49 M× 104 mL)÷ 265 mL= Cf

0.1923 M= Cf

In summary, the final concentration is 0.1923 M.

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Water has a molar mass of 18 g/mol while propane has a molar mass of 44 g/mol.

As a result, 44.0 g (1 mole) of propane will burn in order to produce 4 moles of water.

Mass of water obtained =4×18=72.0 g.

Propane undergoes burning with hydrocarbons to release its chemical energy. An animation of hydrocarbon combustion is shown here to demonstrate the overall process that happens when oxygen and propane mix. One instance of an exothermic process is the hydrocarbon combustion reaction, which produces heat energy.

A fuel and an oxidant, often atmospheric oxygen, engage in a high-temperature exothermic (heat-releasing) redox (oxygen-adding) chemical reaction during combustion that results in oxidised, frequently gaseous products in a mixture known as smoke.

The balanced chemical equation for the total combustion of propane states .

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The change in the total energy of the system is -93.1kJ.

Let us note that the term thermodynamics has to do with the study of heat. Recall that heat is that which leads to the increase in the temperature of a body. From the first la of thermodynamics, we know that heat can neither be created nor destroyed but can be transformed from one form to another as we can see.

We also know from the first law of thermodynamics that;

ΔE = q + w

ΔE  = total internal energy

q = heat absorbed or evolved

w = work done

Let us find the work done as;

w =pΔV

w = 45.0 atm (3 - 8.8)

w = -261  atm L or -26.4 kJ

We have q as  -66.7 kJ  because heat was released

ΔE  = -66.7 kJ - 26.4 kJ

ΔE  = -93.1kJ

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The maximum amount of ethane (C₂H₆) that can be formed is 9.15 g.

The formula for the the limiting reagent is H₂

The amount of excess reagent that remains after the reaction is 3.86 g.

The limiting reagent is the reactant that is completely used up in a reaction, and thus determines when the reaction stops.

The limiting reagent is determined by balancing the chemical equation as follows;

H₂ + C₂H₄  --------> C₂H₆

From the reaction above;

1 mole of hydrogen gas = 1 mole of ethylene = 1 mole of ethane

2 g of hydrogen gas (H₂)  = 30 g of ethane (C₂H₆)

0.61 g of H₂ = ? of C₂H₆

= (0.61 x 30)/2

= 9.15 g of C₂H₆

Thus, the maximum amount of ethane (C₂H₆) that can be formed is 9.15 g.

The formula for the the limiting reagent is H₂ because it will be completely used up.

2 g of H₂ = 28 g of C₂H₄  -

0.61  of H₂ = ?

= (0.61 x 28)/2

= 8.54 g

Excess mass of the ethylene that remains = 12.4 g - 8.54 g = 3.86 g

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The unknown elements based on their physical properties are as follows:

Element 1 is Krypton

Element 2 is Strontium

Element 3 is Lead

Element 4 is Bromine

Element 6 is Francium

Some of the physical properties of elements used to identify the elements include:

Considering the properties of the given elements from the periodic table:

Element 1 = Krypton

Element 2 = Strontium

Element 3 = Lead

Element 4 = Bromine

Element 5 = Copper

Element 6 = Francium

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The molecular weight of oxygen gas is 32 grams per mole, and we calculate the weight of the atmosphere based on this estimate.

Solution:

PV = nRT

6.30 x 1.95 = n x 12.285 x 290

n = 0.6226 moles.

The molar weight of oxygen gas is 32 grams, mol on which to estimate the atmospheric weight. Irregular Edges Edges are often jagged chipped or blurred. The pigment can spread to the surrounding skin. Uneven Colors Black brown and tan shades may be present. White, gray red, pink, or blue areas can also be seen.

If the mole is larger than other moles has dirty or uneven edges is uneven in color, or is slightly pink see a doctor for an examination. please give me. Bruises that appear in adulthood should be checked. However, the most worrying sign is the change in the mole. Experts believe that genetic factors, hormonal changes, and sun damage can cause new moles to suddenly appear, but no one knows for sure.

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The group that accounts for the difference among the various amino acids is the side chain (option B).

Amino acids are any chemical molecule that has both an amino and a carboxylic acid functional group.

The antecedents or building blocks of protein molecules are known as amino acids. Ingredients that make up amino acids include:

The R group, a particular side chain, is also joined to the carbon in each of the 20 amino acids. The shapes, sizes and charges of the R groups vary. As a result, amino acids can be categorized based on the characteristics of their side chains.

All amino acids have the same amino and carboxyl groups; the R group, however, differs for each amino acid.

In nature, there are 20 different amino acids, each of which has an amino and carboxyl group. However, what sets them apart from one another is that they each have a unique R (side) chain.

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Moles of potassium nitrate are produced at the same time 4.4 moles of aluminum phosphate are produced is 28.63 mole

Potassium nitrate is an inorganic salt with a chemical formula of KNO₃ it is a natural source of nitrate and has been used as a constituent for several different purposes including food preservatives, fertilizers, tree stump removal, rocket propellants, and fireworks

Here given data is

4.4 moles of aluminum phosphate

We have to find  moles of potassium nitrate =?

Number of mole = mass of substances/mass of one mole

Number of mole = 126/ 4.4 moles

Number of mole = 28.63mole

So, 28.63 mole potassium nitrate are produced at the same time 4.4 moles of aluminum phosphate are produced

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Answer:

6186.98

Explanation:

105.4 mol of nickel is 6186.98 nickel

Answer:

chicken tenders and egg rolls and butter fingers

Answer:

Explanation:

Many materials can be used in making textiles. The materials are mainly from animal, plant, mineral and synthetic sources. The examples are as follows;

Condensation is a chemical reaction of synthesis and represents two organic molecules producing one organic molecule.

Condensation reaction is a reaction of two substances with the simultaneous loss of water or other small molecule.

Condensation reaction is a chemical reaction that synthesizes larger molecules from two or more smaller molecules with the release of water.

An example of condensation reaction is the synthesis of dipeptide (protein) from amino acids building blocks.

Therefore, it can be said that condensation synthesizes larger organic molecules from two smaller ones.

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The number of breadths supplied by the 200 atm scuba tanks, found using Boyle's law, taking the air as an ideal gas are as follows;

First tank with 14.2 L volume delivers 1,893.[tex]\overline 3[/tex] breadths of air

The second tank with 11.4 L volume, delivers 1,520 breadths of air

An ideal gas is a gas that is not subject to particle to particle interactions, and consists of many particles

The given parameters are;

Pressure air in the two scuba tanks, P₁ = 200 atm

Volume of air in the first tank, V₁₁ = 14.2 L

Volume of air in the second scuba tank, V₁₂ = 11.4 L

Volume of air delivered for each breadth, Vₐ = 1.5 L

Pressure of air delivered by the tank regulator, P₂ = 1 atm.

According to Boyle's law, at constant temperature, the pressure  of a given mass of gas is inversely proportional to its volume

Mathematically, we have;

P ∝ V

P₁·V₁ = P₂·V₂

The volume occupied by a given number of breadths, n, Vₙ = Vₐ × n

According to Boyle's law, the number of breadths supplied by the first tank is therefore;

P₁·V₁₁ = P₂·Vₐ·n

Which gives;

[tex]n = \dfrac{P_1\cdot V_{11}}{P_2 \cdot V_a}[/tex]

Therefore;

[tex]n = \dfrac{200\times 14.2}{1 \times 1.5}\approx 1893.\overline 3[/tex]

The number of breadths supplied by the first tank is 1,893.[tex]\overline 3[/tex] breadths

Similarly, the number of breadths supplied by the second tank is given by the formula;

P₁·V₁₂ = P₂·Vₐ·n

[tex]n = \dfrac{P_1\cdot V_{12}}{P_2 \cdot V_a}[/tex]

[tex]n = \dfrac{200\times 11.4}{1 \times 1.5}\approx 1893.\overline 3 = 1,520[/tex]

The number of breadths supplied by the second tank is 1,520 breadths

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The element X  in the ionic compound from the question belongs to group 2.

An ionic compound is a compound that is formed when there is a combination of two or more atoms that are combined by the transfer of electrons. Now we know that the transfer of the electrons would give rise to the formation of to ions, a cation and an anion. The cation is the specie that lost electrons while the anion is the specie that gained the electrons. Thus the compound is composed actually of an ions pair that are necessarily of opposite charges from each other.

In this case, an ionic compound has the formula[tex]X_{3} N_{2}[/tex]. We can see that the element X has reacted with nitrogen to form a nitride and that the nitrogen has a subscript of 2 as shown.

The fact the nitrogen has a subscript of 2 shows that the element belongs to group 2.

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The statement that is true if the ΔEsys = -100 J is that the system looses 100J  of energy which is gained by the surroundings.

Note that the study of energy is what we call thermodynamics. We should note that according to the laws of thermodynamics, energy can not be created nor destroyed but can be converted from one form to another.

This implies that the energy that is lost by the system must be gained by the surroundings since there can never be energy that goes to waste in the system.

Recall that the universe is composed of the system and the surroundings and the energy that is lost by the system must be gained by the surroundings and vice versa. This would now be our guide in deciding which statement is right above from what we have in the question here.

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Will Argon, Neon, and Krypton react same

Noble gases only helium and neon are truly inert and the other noble gases will react on a limited scale under very specific conditions and krypton will form a solid with fluorine, and xenon will form a variety of compounds with oxygen and fluorine and the name comes from the fact that these elements are virtually unreactive towards other elements or compounds and they do not react with other element

Neon is a colorless, odorless, unreactive gas and argon is a colorless, odorless, unreactive gas and krypton is a colorless, odorless, unreactive gas

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The bonds do not have energy, the atoms release heat.

change: unmarried alternative AB + C → AC + B

exchange: Double alternative AB + CD → ad + CB

mixture (Synthesis) A + B → AB

Decomposition AB → A + B

A chemical reaction is a method that ends in the chemical transformation of one set of chemical substances to some other.

A procedure that includes rearrangement of the molecular or ionic shape of a substance, in preference to a exchange in bodily form or a nuclear reaction.

A chemical response is a technique in reactants react chemically and convert into products via chemical transformation. as an example, breathing – we inhale oxygen which reacts with glucose and produces carbon dioxide, water and strength. The response is given below. C6H12O6 + 6O2 → 6CO2 + 6H2O + power.

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Answer:

A. True

Explanation:

Explanation

Given

N2(g)+3H2(g)—> 2NH3(g)

Number of moles of nitrogen = 1.5 moles

Number of moles of hydrogen = 6 moles

Required: Limiting reagent

Solution

For Nitrogen:

For Hydrogen:

The limiting reagent is Nitrogen, because less moles of NH3 will be produced by nitrogen, meaning it all of it gets used up.

Answer

The limiting reagent is Nitrogen.

Answer:

proton= 17

neutron=18

electron=16