what is NOT a function of the Digestive System

Answer: 25.13 g of \(N_2O\)  and 20.56 g of \(H_2O\) will be produced from 45.70 g of \(NH_4NO_3\)

Explanation:

To calculate the moles :

\(\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}\)    

\(\text{Moles of} NH_4NO_3=\frac{45.70g}{80.04g/mol}=0.571moles\)

The balanced chemical equation is:

\(NH_4NO_3\rightarrow N_2O+2H_2O\)  

According to stoichiometry :

1 mole of \(NH_4NO_3\) produce = 1 mole of \(N_2O\)

Thus 0.571 moles of \(NH_4NO_3\) will require=\(\frac{1}{1}\times 0.571=0.571moles\)  of \(N_2O\)  

Mass of \(N_2O=moles\times {\text {Molar mass}}=0.571moles\times 44.01g/mol=25.13g\)

1 mole of \(NH_4NO_3\) produce = 2 moles of \(H_2O\)

Thus 0.571 moles of \(NH_4NO_3\) will require=\(\frac{2}{1}\times 0.571=1.142moles\)  of \(H_2O\)  

Mass of \(H_2O=moles\times {\text {Molar mass}}=1.142moles\times 18g/mol=20.56g\)

Thus 25.13 g of \(N_2O\)  and 20.56 g of \(H_2O\) will be produced from 45.70 g of \(NH_4NO_3\)

To solve this problem, we need to use the ideal gas law to determine the number of moles of butane (C4H10) that are present in the given volume and conditions. Then, we can use the balanced chemical equation to find the ratio of moles of C4H10 to moles of H2O produced, and finally use the molar mass of water to convert the number of moles to grams.

Step 1: Calculate the number of moles of butane

Using the ideal gas law:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

We need to convert the given temperature from Celsius to Kelvin by adding 273.15:

T = 65.0°C + 273.15 = 338.15 K

Now we can solve for n:

n = PV/RT = (1.70 atm)(36.0 L)/(0.0821 L·atm/mol·K)(338.15 K) = 1.56 mol

So we have 1.56 moles of C4H10.

Step 2: Calculate the number of moles of water produced

From the balanced chemical equation:

2C4H10 + 13O2 → 8CO2 + 10H2O

we see that 2 moles of C4H10 produce 10 moles of H2O. Therefore, the ratio of moles of C4H10 to moles of H2O is:

2 mol C4H10 / 10 mol H2O = 0.2 mol C4H10 per mol H2O

So for 1.56 moles of C4H10, we will have:

1.56 mol C4H10 × (1 mol H2O / 0.2 mol C4H10) = 7.8 mol H2O

Step 3: Convert moles of H2O to grams

Using the molar mass of water, which is 18.015 g/mol, we can convert the number of moles of H2O to grams:

7.8 mol H2O × 18.015 g/mol = 140.3 g H2O

Therefore, 140.3 grams of water will be produced.

Answer:

The rarity of each element.

Explanation:

The periodic table shows the atomic number and the atomic mass. The abundance (or rarity) of each element is not given.

Answer: sorry misclick

Explanation:

Answer:

11: D

12: C

last picture: A

Explanation:

hope this helps

Avogadro's hypothesis states that in constant temperature and pressure, the total number of atoms/molecules of a gas is directly proportional to the volume of gas. This can be expressed by the following equation,

N ∝ V, where N and V represent moles of gas and volume of gas respectively.

Under identical conditions, each liter of all gases contains the same number of molecules.

Avogadro's Number(Nₐ) = 6.023×10²³

A gas containing 6.023×10²³ molecules is called 1 mole of that particular gas. For example, 1-mole Oxygen gas contains 6.023×10²³ Oxygen molecules.

Under standard temperature and pressure (STP), all gases have a volume of 22.4 liters. Hence, under STP conditions, all gases contain the same number of molecules which is 6.023×10²³.

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Coal-burning plants and nuclear plants both generate waste, but only nuclear waste must be stored indefinitely due to its hazardous and radioactive nature.

Coal-burning plants generate waste in the form of ash, sludge, and other byproducts. This waste can be reused in other industries, such as construction materials and cement production, or disposed of in landfills. While some of the waste from coal-burning plants may contain heavy metals and other pollutants, it is generally not considered hazardous or radioactive.

On the other hand, nuclear plants generate highly radioactive waste in the form of spent nuclear fuel and other byproducts of nuclear reactions. This waste can remain dangerous for thousands of years and must be carefully stored and monitored to prevent harm to human health and the environment. The long-term storage and disposal of nuclear waste is a complex and controversial issue that has yet to be fully resolved.

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The rate constant of the Decay of Radium with half life of 1620 years is 0.0004277/year.

We know, every radioactive reaction is a first order reaction.

So, it will follow the first order kinetics.

The half life of the radium sample is 1620 years.

We know, the standard formula for the half life of the first order reaction is,

T = 0.693/K

Where,

T is the half life of the reaction,

L is the rate constant of the reaction.

It is given that the half life of the reaction is 1620 years, so, putting all the values,

T = 0.693/K

K = 0.693/1620

K = 0.0004277/year.

So, the rate constant of the decay of radium is 0.0004277/year.

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Explanation:

In a solid particles are firmly together and are stuck in a regular pattern

in a liquid particles still touch but arent in a fixed pattern

in a gas particles move quickly in all directions

Answer:

Ions are formed when atoms lose or gain electrons in order to fulfill the octet rule and have full outer valence electron shells.

Explanation:

When they lose electrons, they become positively charged and are named cations. When they gain electrons, they are negatively charged and are named anions.

The hydrolysis of esters in base is called saponification .

So, option C is correct one.

The saponification is the process that involves conversion of fats , oils , lipids into soap and water in the presence of alkaline medium. Saponification is the process of making soap.

During the saponification process, the mixture has an acidity, which tells that it's not safe for usage. After the saponification process is complete, the pH should be a base.The process of formation of carboxylic salt and water by hydrolysis of ester in base is called saponification.

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The species that is capable of donating protons are called acids. Acids in the aqueous solution increase the level of the hydrogen ion concentration.

Acids are the ions and molecules that donate their protons to another species forming a conjugate base. They are the sour-tasting substance that alters the blue litmus to red in colour.

According to Bronsted Lowry, the species donates protons or dissociate to give the \(\rm H^{+}\) ions. For example,

\(\rm H_{2}SO_{4} \leftrightharpoons H^{+} + SO_{4}^{-2}\)

When sulfuric acid is dissolved in water it increases the hydrogen ion concentration as,

\(\rm \rm H_{2}SO_{4} + H_{2}O \leftrightharpoons HSO_{4}^{-} + H_{3}O^{+}\)

Therefore, option c. acids increase the hydrogen ion concentration.

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Answer:

c

Explanation:

took the test

The frequency of an x-ray wave with an energy of 2×10^(-17) J in hertz is 3.01 × 10^(16) hz.

We can find the value of frequency of an x ray wave by using the relation between energy and frequency.

As we know that,

Energy is directly proportional to the frequency of the wave.

Mathematically,

E = h. f

Where,

E is the energy in joule

f is the frequency of the wave in hertz

h is the planck's constant

Given,

E = 2 × 10^(-17)J

h = 6.63 × 10^(-34) kg.m2/s

By substituting all the values, we get

2 × 10^(-17)J = 6.63 × 10^(-34) kg.m2/s × f

f = 2 × 10^(-17)J / 6.63 × 10^(-34) kg.m2/s

f = 3.01 × 10^(16) hz.

Thus, we concluded that the frequency of an x-ray wave with an energy of 2×10^(-17) J in hertz is 3.01 × 10^(16) hz.

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Answer:

one generation to the next via DNA,

Explanation:

Heritable traits are known to be passed from one generation to the next via DNA, a molecule that encodes genetic information. ... Organisms inherit genetic material from their parents in the form of homologous chromosomes, containing a unique combination of DNA sequences that code for genes.

Answer:

Salt particles will diffuse and towards where it is less that is left !!

so your answer is A !! left through diffusion !!

Explanation:

Answer:

Salt particles will move toward the left through diffusion

Explanation:

I just took the quiz.

Answer:

60.052 g/mol

Explanation:

Answer:

60.052 g/mol

I hope it can help

Answer:

Explanation:

Here, we want to know what happens to a solution that becomes more acidic

A lesser ph (1-7) indicates acidity with the acidity being higher as the number becomes smaller

What this means is that a solution with a pH of 3 is more acidic than a solution with a pH of 5

Thus, when the acidity increases, it is expected that the pH of the solution decreases (it becomes smaller in number)

Evaporation is the process by which a liquid converts into a gas or vapor at a temperature below its boiling point. Latent heat of fusion is the amount of heat required to convert a solid into a liquid without any change in temperature.  Steam causes more severe burning as compared to boiling water at 100°C due to the large amount of latent heat of vaporization.

On the other hand, boiling is the process by which a liquid turns into a gas or vapor at a temperature equal to or above its boiling point. In other words, when the liquid is heated to a temperature equal to or greater than its boiling point, it turns into a gas or vapor. The effect of humidity on the rate of evaporation is that if the air around the liquid is already humid, then the rate of evaporation will be slower because the air is already saturated with water molecules.
Latent heat of fusion is the amount of heat required to convert a solid into a liquid without any change in temperature. In other words, it is the amount of heat required to break the intermolecular forces between the molecules of a solid to convert it into a liquid.
Steam causes more severe burning as compared to boiling water at 100°C because steam contains a large amount of latent heat of vaporization. When steam comes in contact with the skin, it releases a large amount of latent heat of vaporization, which causes more severe burns as compared to boiling water at 100°C.

Evaporation is the process of turning a liquid into a gas or vapor at a temperature below its boiling point. Boiling, on the other hand, is the process of turning a liquid into a gas or vapor at a temperature equal to or above its boiling point. Humidity affects the rate of evaporation. Latent heat of fusion is the amount of heat required to convert a solid into a liquid. Steam causes more severe burning as compared to boiling water at 100°C due to the large amount of latent heat of vaporization.

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Typical DMI (Dry Matter Intake) for dairy cattle during the dry period is around 2.0 to 2.2% of their body weight. This means that a dairy cow will consume approximately 2.0 to 2.2% of its body weight in dry feed each day during the dry period.

Dairy cows are not producing milk during the dry period, which is the time frame of about 60 days prior to calving, and are instead getting ready for the upcoming lactation cycle. Their dietary needs at this period are different from those they have when they are actively making milk.

There are a number of reasons why DMI is lower during the dry season. First of all, during the dry phase, the cow's udder involutes (regresses) and gets ready for the impending lactation. The cow's metabolic activity decreases as a result, and she requires less energy.

Second, during the dry season, the cow's rumen capacity drops. Due to the growing calf and the shrinking amount of the udder, the capacity of the rumen, the main component of the cow's stomach, has been diminished. The amount of feed that the cow can eat is constrained by the small rumen space.

The cow's physiological state during the dry period and fluctuations in hormone levels can also have an impact on the cow's appetite. A decrease in feed intake may result from hormonal changes and rumen motility changes that the cow may encounter.

It is crucial to keep in mind that the precise DMI during the dry period can change depending on elements including cow genetics, physical condition, and management techniques. For dairy farmers to maintain ideal cow health and get their animals ready for a successful lactation phase, it's critical to track each cow's consumption and modify feeding techniques accordingly.

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Answer:

CaCO3

Explanation:

E.F. is looking for the lowest possible ratio

ANSWER

EXPLANATION

Given that

The number of moles lithium bromide is 5.5 moles

Firstly, write a balanced equation for the reaction

Find the number of moles of bromine using stoichiometry ratio

Let x represents the number of bromine

Answer: 8000

Explanation:

Answer:The correct answer is (a) 0.0886 M.

Explanation:

To calculate the molarity of household bleach in moles per liter of NaOCl, we can use the given equation:

Molarity = (% NaOCl * 10 * density) / Molecular Weight

Let's substitute the given values into the equation:

% NaOCl = 6.0% = 0.06 (decimal form)

Density = 1.10 g/mL = 1100 g/L

Molecular Weight of NaOCl = 74.45 g/mol

Molarity = (0.06 * 10 * 1100) / 74.45

Molarity = 0.0886 M

Therefore, the molarity of household bleach in moles per liter of NaOCl is 0.0886 M.

The molarity of household bleach in moles per liter of NaOCl is 0.886 M.

To calculate the molarity of household bleach in moles per liter of NaOCl, we can use the formula:

Molarity = (% NaOCl * 10 * density) / Molecular Weight

Given that household bleach contains 6.0% w/w of NaOCl, the percentage is 0.06. The density of the bleach solution is 1.10 grams/ml, or 1100 grams per liter. The molecular weight of NaOCl is 74.45 grams/mole.

Plugging these values into the formula, we have:

Molarity = (0.06 * 10 * 1100) / 74.45

Simplifying the expression, we get:

Molarity = 0.886

Therefore, the molarity of household bleach in moles per liter of NaOCl is 0.886 M.

So, the correct answer is c) 0.886 M.

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Explanation:

1.) 6Li + Al2(CO3)3 -----> 3Li2CO3 + 2Al

From the stoichiometry of the equation,

6 moles of Li reacts with 1 mole of Al2(CO3)3

x of Li will react with 1.64 moles of Al2(CO3)3

=> x = (1.64 × 6) ÷ 1

=> x = 9.84 moles of Li

2.) 2Mg + N2 -----> 2MgN

2 moles of Mg react completely with 14 g of N2

4.226 moles of Mg will react with x of N2

=> x = (4.226 × 14) ÷ 2

=> x = 29.582 g of N2

3.) 8Fe + S8 -----> 8FeS

256 g of Sulphur give 8(56 + 32)g of FeS

16 g of Sulphur will give x of FeS

=> x = (16 × 704) ÷ 256

=> x = 44 g of FeS

256 g of Sulphur react with 8(56)g of Fe

16 g of Sulphur will react with x of Fe

=> x = (16 × 8 × 56) ÷ 256

=> x = 28 g of Fe

4.) B2H6 + 3O2 -----> HBO2 + 2H2O

27.6 g of B2H6 burn in 3(32)g of O2

31.6 g of B2H6 will burn in x of O2

=> x = (31.6 × 3 × 32) ÷ 27.6

=> x = 109.9 g of O2

27.6 g of B2H6 produce 2 moles of H2O

12.8 g of B2H6 will produce x of H2O

=> x = (12.8 × 2) ÷ 27.6

=> x = 0.93 moles of H2O

Answer:

Hey kimalonzo59!

· Calculate specific heat as c = Q / (mΔT). In our example, it will be equal to c = -63,000 J / (5 kg * -3 K) = 4,200 J/ (kg·K). This is the typical heat capacity of water.

I hope this Helps, Have an Awesome Day!

~ Chloe Marcus ❤

Water freezes at 0° C.  One gram of water when freezes release 333.55 J/g  of energy. Therefore, 95.7 g of water releases 31920.73 J  energy when freezing.

Freezing point is the temperature at which a substance changes from its liquid state to solid state, where, these two states are in equilibrium. Freezing point of a substance depends on the molecular weight, bond type, temperature and pressure.

The energy  released during the phase change from liquid to solid is called heat of fusion or fusion enthalpy. More specifically it is the energy required to fuse the molecules  together to form their solid pack.

The heat of fusion of water is 333.55 J/g. Therefore, 1 g of water when freezes at 0° C it releases 333.55 J of energy. Thus, the amount of energy  released when 95.7 g of water is freezed can be calculated as follows:

Heat of fusion = mass × heat fusion of 1 g of water

                       = 95.7 g × 333.55 J/g

                       = 31920.73 J

Therefore, 95.7 g of water releases 31920.73 J heat energy when freezing.

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Answer:

d. pOH = 12 => pH = 14 - 10 = 2 => most acidic

Explanation:

pH = -log[H⁺] => [H⁺] = 10^-pH

By definition, if ...

[H⁺] > 10⁻⁷ > [OH⁻] => pH < -log(10⁻⁷) < 7 => pOH > 14 - 7 > 7 => acidic solution

[H⁺] = 10⁻⁷ = [OH⁻]  => pH = -log(10⁻⁷) = 7 => pOH = 14 - 7 = 7 => neutral solution

[H⁺] < 10⁻⁷ < [OH⁻]  => pH > -log(10⁻⁷) > 7 => pOH < 14 - 7 < 7 => basic solution

∴ From most basic to most acidic ...

a. pH = 12 => most basic

b. pOH = 5 => pH = 14 - 5 = 9

c. [H⁺] = 1 x 10⁻⁸ => pH = -log(10⁻⁸) = -(-8) = 8

d. pOH = 12 => pH = 14 - 10 = 2 => most acidic

The correct option is C, The predominant intermolecular force between molecules of I₂ is ion-dipole interactions.

Intermolecular forces refer to the attractive or repulsive forces that occur between molecules. These forces are responsible for the physical properties of substances, including their boiling and melting points, viscosity, and surface tension.The strength of intermolecular forces varies depending on the type of molecule and the distance between them. The four main types of intermolecular forces are van der Waals forces, hydrogen bonds, dipole-dipole interactions, and ion-dipole interactions.

Van der Waals forces are the weakest and occur between all molecules, while hydrogen bonds are the strongest and occur specifically between molecules containing hydrogen and a highly electronegative atom, such as nitrogen, oxygen, or fluorine. Intermolecular forces play an important role in many chemical and physical processes, including the solubility of substances, the behavior of gases, and the properties of liquids and solids

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The combination of ionic bonding and polar covalent bonding in NaOH gives rise to its distinct chemical and physical properties.

In NaOH, sodium hydroxide, two types of bonding occur: ionic bonding and polar covalent bonding.

Ionic bonding is the primary type of bonding in NaOH. It involves the transfer of electrons from the metal atom (sodium, Na) to the non-metal atom (oxygen, O) and hydrogen (H). Sodium donates its outermost electron to the oxygen atom, resulting in the formation of a positively charged sodium ion (Na+) and a negatively charged hydroxide ion (OH-). The strong electrostatic attraction between these oppositely charged ions holds the compound together.

However, there is also a degree of polar covalent bonding within NaOH. The oxygen atom, being more electronegative than hydrogen, attracts electrons more strongly. As a result, the oxygen atom in the hydroxide ion (OH-) carries a partial negative charge, while the hydrogen atom carries a partial positive charge. This unequal sharing of electrons creates a polar covalent bond between the oxygen and hydrogen atoms within the hydroxide ion.

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