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Answer:

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Based on the balanced reaction equation, 9 moles of carbon dioxide are formed when 3 moles of propane are combusted.

From the balanced reaction equation we can see that 3 moles of carbon dioxide are formed upon the combustion of a single mol of propane:

C₃H₈ + 5 O₂ → 3 CO₂ + 4 H₂O

These molar ratios are constant and enable us to set up a simple proportion:

1 mol of propane : 3 mol of carbon dioxide = 3 mol of propane : X

X = 3 mol of carbon dioxide * 3 mol of propane / 1 mol of propane

X = 9 mol of carbon dioxide

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Answer:vinegar will disolve in water, water will not go into veg oil because it is polar.

rubbing alcohol will disolve in water and not in vegtable oil because it is nonpolar

salt will disolve and water will not disolve in veg oil because it is ionic

Explanation:

The mechanism of formation of Nitrosyl bromide from [tex]Br_2[/tex] and NO in a chemical reaction is depicted by the given elementary steps.

The outcome of a reaction combining nitrogen monoxide and [tex]Br_2[/tex] as our starting materials will be nitrosyl bromide; the final mixture will have a combination of all three chemicals.

Nitrosyl bromide is a red gas that condenses slightly below room temperature. The reversible reaction of nitric oxide with bromine can produce nitrosyl bromide.

Overall reaction can be obtained by adding the given two elementary steps:

[tex]Br_2 + NO \rightarrow Br_2NO\\Br_2NO + NO \rightarrow 2BrNO[/tex]

On addition of the above two reactions,

[tex]Br_2 + Br_2NO + 2NO \rightarrow Br_2NO + 2BrNO[/tex]

The overall reaction obtained is:

[tex]Br_2 + 2NO \rightarrow 2BrNO[/tex]

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A controlled variable is one that is constant and is unchanged in an experiment. It is held constant in order to observe the result of the independent variable.

An independent variable is the variable that is being changed in the experiment in each trial, while a dependent variable is the one that is being measured.

Answer: Pluto

Explanation: Ok, so Pluto is the farthest. It is 3.7 billion miles away from our sun.

The calculated molar volume of hydrogen will be too high as a result of this error

The gas being recorded during the experiment would not only include hydrogen gas, but the air that leaked into the eudiometer tube as well. This leads to the increase in the volume of hydrogen gas which will be too high. Since the volume of hydrogen is too high,  the calculated molar volume of hydrogen would also be too high.

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Answer:

A column in the periodic table of the chemical elements.

Answer:

A group is the arrangement of elements vertically, in the periodic table. It can be determined by the number of valence electrons present in the atom.

The theoretical yield of C that is obtained is 13.26 g.

We know that the theoretical yield has to do with the amount of the substance that is obtained as we can get it from the stoichiometry of the balanced reaction equation. Hence the first step that we have to carry out is to try to obtain the balanced reaction equation that can be used to describe the reaction as it has been shown.

The balanced reaction equation is;

6 A(aq) + 7 B(aq) → 7 C(s) + 6 D(g)

Number of moles of A = 4.0 L * 0.20 M = 0.8 moles

Number of  moles of B =  3.0 L * 0.20 M = 0.6 moles

Now;

6 moles of A reacts with 7 moles of B

0.8 moles of A reacts with 0.8 moles * 7 moles/6 moles

= 0.93 moles

Thus B is the limiting reactant.

If  7 moles of B yleds 7 moles of C

Amount of C obtained = 0.6 moles

Mass of C obtained =  0.6 moles *  22.01  g/mol

= 13.26 g

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Because red and its complementary hue, green, are communicated, we see CoCl2 as a red color. Green, however, is its complementary color and is what is absorbed. The only color that can be seen is the color that is communicated. Red is what we can see, not green.

The logarithm of the ratio of incident to transmitted radiant power through a sample is known as absorbance. As an alternative, absorbance can be defined as "the negative logarithm of one minus absorptance, as measured on a homogeneous sample," for samples that scatter light.

As opposed to absorption, which occurs when electrons move up to a higher energy state from a lower energy state, emission occurs when electrons move down to a lower energy state, giving rise to a negative energy. When electrons undergo an energy change that is positive and migrate from one state of lower energy to another, this is called absorption. The color that can be seen by the eye is called the transmitted color, whereas the color that cannot be seen is called the absorbed color. The ntary color is discernible.

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The atomic weight of one carbon atom = 12 amu

Mass of 1 mole of carbon atoms = 1 × atomic weight of one carbon

= 12 gm

Since we already know that the atomic mass is specified for one mole of the atom, we may get the mass of one atom by dividing the mass by Avogadro's number.

The mass of one atom of carbon is = Atomic mass/Avogadro number

= 12g/6.022×10^23

= 126.022×10^−23g

= 1.9933×10^−23g

Hence, the mass of 1 carbon atom is 1.9933×10^−23grams

Now,

Mass of 8.99 x 10^24 atoms = (8.99 x 10^24) x (mass of 1 carbon atom)

⇒ Mass of 8.99 x 10^24 atoms = 8.99 x 10^24 x 1.9933×10^−23grams

⇒ Mass of 8.99 x 10^24 atoms = 17.919767 x 10

⇒ Mass of 8.99 x 10^24 atoms = 179.2 g (approx.)

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Answer:

A neutralization reaction is when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water

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Answer:

it's b

hydrogen ions and hydroxide ions...

hope it helps you

The addition of ice at the end of the heating process is important because it increases the solubility of the aspirin product.

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The correct option is A.

The percentage error in the measurement of the density is about 12%.

The error in any measurement is the difference between the actual measurement of the substance and the estimated measurement of the substance.

The percentage error is obtained by dividing the error in the measurement by actual measurement and multiply the result by 100%.

The average density measurement = 6.5 g/mL

error = actual measurement - estimated measurement

error = 7.4 g/mL - 6.5 g/mL

error = 0.9 g/mL

percentage error = (0.9 / 7.4) x 100%

percentage error = 12.16 %

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Switch the 3 and the 4, this change must made to the coefficients to balance this equation.

Now, the correct balance equation is C₃H₈ + 5 O₂ → 3 CO₂ + 4H₂O

This method of balancing chemical equations involves assigning algebraic variables as stoichiometric coefficients to each species in the unbalanced chemical equation.

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Answer:

a) The subshell would be 5g .

b) Yes L can be bigger than 3 in case of n=5.

Explanation:

a) The given principle quantum number n=5 signifies the 5th orbit. Also, the given Azimuthal quantum number l=4 represents the g subshell. Thus, the subshell in which the electrons with the given set of principle and azimuthal quantum number are found is 5g.

b) As n=5 and the general rule is l=n-1. So L can be equal to 1,2,3 or 4.

Answer:

A= solid

B= Melting and freezing

C= Liquid

Mixing an acid and a base does not necessarily neutralize them. Neutralization refers to the situation where equal parts of acid and base are mixed.

If equal parts of a strong acid and a strong base are mixed, the pH of the resulting solution will be very close to 7 depending on factors such as temperature. However, if a strong base is used to neutralize a weak acid the resulting solution will have a pH greater than 7 basic and if a weak base is used to neutralize a strong acid, the resulting pH will be less than 7.

It is therefore not entirely correct to say that all acid-base reactions are examples of neutralization only those where acids and bases are mixed in stoichiometrically equal amounts. Hazardous material spills must be absorbed, neutralized, or controlled in the event of an accident to ensure workplace safety. Neutralization of acids and bases allows for safer handling of spills and reduced disposal costs.

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Based on Beer's law and the data provided (molar absorptivity, number of moles, volume of the solution, cell dimension) we can calculate that the absorbance of the sample will be 0.42336.

According to Beer's law, the measured absorbance is proportional to the molar absorptivity of the substance, its molarity in the sample, and the pathlength of the cell:

A = ε * c * l

ε - molar absorptivity (252 M⁻¹cm⁻¹)

c - molarity of the sample

l - pathlength (6.00 mm = 0.6 cm)

To calculate the absorptivity we need to calculate the molarity of the sample:

c = n/V = 0.00140 mol / 0.5000 L = 0.00280 M

A = 252 M⁻¹cm⁻¹ * 0.00280 M * 0.6 cm = 0.42336

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Answer:

i dint not knowwws wj

example

Explanation:

this is so hard someone give answer

a density is a height and can the numbers

maid that because is too long with a

short 40.-- micality

hope itz help

Perfect gas is a hypothetical gas in which the volume of the individual atoms (molecules) is negligible compared to the total volume of the container is true.

For a gas to be ideal, it has to follow the following rules.

The volume of molecules of a Perfect gas also known as an ideal gas has to be almost negligible as compared to the volume of the container.

The molecules do not attract or repel each other. They hardly collide with other in an elastic collision. This elastic collision also happens with the wall of the container.

So according to the first rule, the volume of individual molecules is negligible as compared to the the total volume of the container.

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Hair fall is due to weather change and due to humidity in weather. Hair fall can be because of chemical in oil and shampoo.

Chemicals are defined as a substance is a type of matter with a consistent chemical composition and distinct properties.

It can also be defined as a substance that cannot be broken down without undergoing change.

Chemicals are the substances that are used in chemistry experiments.

There are five main types of chemicals.

Some of the common chemicals are

Thus, hair fall is due to weather change and due to humidity in weather. Hair fall can be because of chemical in oil and shampoo.

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An example of radioactivity that occurs when a neutron is converted to a proton and an electron is emitted from the nucleus and emission of a beta particle

Radioactivity is the phenomena in which spontaneous disintegration of unstable atomic nuclei to form more energetically stable atomic nuclei and radioactive decay is the highly exoergic and radioactivity that occurs when a neutron is converted to a proton and an electron is emitted from the nucleus and emission of a beta particle and beta particle is emitted by radioactivity by conversion of neutron to proton and fast moving electron and  radioactive decay by the loss of an electron from the nucleus

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The temperature reading on Fahrenheit scale is related to the The temperature reading on Celsius scale by a linear equation F = 9/5 C + 32

Data for Fahrenheit temperature scale:

Water freezing point = 32⁰

Water boiling point = 212⁰

Therefore, the scale is divided into 212 - 32 = 180 scales.

Data for Celsius temperature scale:

Water freezing point = 0⁰

Water boiling point = 100⁰

Therefore, the scale is divided into 100 - 0 = 100 scales.

Scale ratio:

C : F = 100 : 180 = 5 : 9

It means each increment of 1⁰ on Celsius scale is equal to an increment of 9/5 degree on Fahrenheit scale. However, we need to add an offset 32⁰ on Fahrenheit scale.

Hence,  the reading C⁰ on Celsius scale is equivalent to:

F = 9/5 C + 32

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The mass of water produced is 35.27g in the given chemical reaction.

A chemical reaction is the chemical change of one set of chemical components into another. A chemical reaction is the process through which two or more molecules combine to create a new product(s). Compounds that combine to make new compounds are referred to as reactants, while the newly produced compounds are referred to as products. When chemical bonds between atoms are established or destroyed, chemical reactions occur. Breaking chemical bonds between reactant molecules and establishing new bonds between atoms in product particles are examples of chemical reactions. The number of atoms is the same before and after the chemical transition, but the number of molecules changes.

Balanced equation:

[tex]2C_6H_{14} + 19O_2 \rightarrow 12CO_2 + 14H_2)[/tex]

Given:

Mass of hexane = 43g

Mass of oxygen = 85.1g

To find:

Mass of water formed = ?

Calculations:

According to the balanced equation, 2 moles of hexane react with 19 moles of oxygen to form 12 moles of carbon dioxide and 14 moles of water.

Molar mass of hexane = 86.118g/mol

Molar mass of oxygen = 32g/mol

(2 x 86.118)g of hexane required = (19 x 32)g of oxygen

43g of hexane required = (19 x 32) / (2 x 86.118) x 43

= 151.79g of oxygen

But we have only 85.1g of oxygen, thus it is a limiting reagent

Now,

(19 x 32)g of oxygen reacts to produce = (14 x 18)g of water

85.1g of oxygen reacts to produce = (14 x 18) / (19 x 32) x 85.1

= 35.271g of water

Result:

35.27g of water is produced.

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0.175M is found to be the concentration of the solution from the given titration reaction.

The idea of concentration is one that is frequently utilized in chemistry and related domains. It is a measurement of how much of one substance is diluted with another.

A chemical species' concentration in a solution, specifically the quantity of a solute per unit volume of solution, is measured by its molar concentration.

Given:

Weight = 0.458g

Volume = 12.84mL

Molecular weight = 204.22g/mol

To find:

Concentration = ?

Formula:

Concentration = no. of moles / volume

Calculations:

No. of moles = weight given / molecular weight

No. of moles = 0.458 / 204.22g/mol

No. of moles = 2.242 x [tex]10^{-3}[/tex] mol

Concentration = 2.242 x [tex]10^{-3}[/tex] / 12.84mL

Concentration = 0.175M

Result:

The concentration of the given solution is found to be 0.175M

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Because there are free electrons present, solid copper conducts electricity. CuCl2(g) does not conduct electricity because it contains no free electrons.

Because free electrons are drawn to metal cations by electrostatic forces in the metallic connection, metals are referred to as conductors of electricity. The conductivity of solid metals is accounted for by these free electrons.

The word "conductivity" is used to describe a number of physical phenomena. In terms of heat, conductivity is the amount of heat that moves through a slab with a unit cross-sectional area per second when there is no temperature difference between the two faces.

Conductivity is a helpful indicator of water quality in general. Every body of water has a typical conductivity range that, once determined, can be used as a reference point for comparison with routine conductivity tests.

A medium that contains ions and is electrically conducting due to the mobility of those ions but does not conduct electrons is called an electrolyte. This contains the majority of salts, acids, and bases that are soluble when dissolved in polar solvents like water.

Along with magnesium, calcium, phosphate, and bicarbonates, sodium, potassium, and chloride are the important electrolytes. We obtain electrolytes from our diet and drinks. Unbalanced amounts of these electrolytes might result in either high or low levels.

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Answer: 26g

Explanation:

First, write the correctly balanced equation for the reaction taking place:

HBr(aq) + NaOH(s) ==> NaBr(aq) + H2O(l) ...  balanced equation

Next, find out which reactant is limiting. An easy way is to just divide the moles of each reactant by the corresponding coefficient in the balanced equation (1 for both in this case):

HBr:  46.1 g HBr x 1 mol HBr / 80.9 g = 0.570 moles

NaOH:  10. g NaOH x 1 mol NaOH / 40. g = 0.25 mols NaOH

NaOH is limiting and will determine the maximum amount of product that can form.

Maximum amount of NaBr that can form:

0.25 mols NaOH x 1 mol NaBr / 1 mol NaOH x 103 g NaBr / mol = 25.75 g NaBr = 26 g NaBr (2 s.f.)

The bubbles indicate that a gas is created and mass is lost as it escapes from the container.

Why stduent is told that the both energy and the mass must be conserved in every chemical reaction?

According to the the law of conservation of mass states that in a chemical reaction mass is neither created nor destroyed.So that the student told that both the energy and mass must be conserved in every chemical reaction.

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