Calculate the amount of heat needed to melt 199. g of solid ethanol (CH3CH2OH) and bring it to a temperature of significant digits. Also, be sure your answer contains a unit symbol.

Answer:

The amount of grams of Cu that reacted is 18.15g

Explanation:

Where:.

Cu= 63.5

O= 16

N= 14

Molar mass of Cu(NO3)2 =

63.5 + 2(14+ 48)

63.5 + 124

=187.5

THEN IF 63.5g of Cu reacted in 187.5g of Cu(NO3) 2

x of Cu is in - - - - >53.6g

x= 63.5 * 53.6/187.5

x= 3403.6/187.5

x= 18.15g of Cu reacted.

Dalton's Atomic Theory and the Law of Definite Proportions are compatible. Hence option b that is Law of Definite Proportions agrees with Dalton's atomic theory is correct statement.

What is the atomic theory of Dalton?

The second part of the theory states that every atom in a certain element has the same mass and properties. The third part defines compounds as mixtures of two or more different types of atoms.

As a result, Dalton's theory acknowledged that all matter is composed of atoms, which is true, but it did not acknowledge the existence of smaller particles within atoms, which is incorrect.

Because compounds are made by the fusing of two or more different types of atoms, Dalton's theory, which claimed that atoms could not interact with one another, is incorrect.

To learn more about Dalton's theory, visit

https://brainly.com/question/15507302

#SPJ13

The energy in nuclear fuel comes from the fission (splitting) or fusion (merging) of atomic nuclei. When the nucleus of an atom is split or merged, a large amount of energy is released in the form of heat and radiation. This energy is known as nuclear energy, and it is one of the most concentrated forms of energy known to us.

To convert nuclear energy into electrical energy, we typically use a nuclear reactor, which is a device that uses controlled nuclear reactions to generate heat. The heat is then used to produce steam, which drives a turbine connected to a generator. The generator converts the mechanical energy of the turbine into electrical energy, which can be distributed to homes and businesses through a power grid.

In more detail, the nuclear reactor contains fuel rods that are made of a radioactive material, such as uranium-235 or plutonium-239. When a neutron strikes the nucleus of one of these atoms, it causes the nucleus to split into two smaller nuclei, along with the release of additional neutrons and a large amount of heat. This process is known as nuclear fission, and it is sustained in the reactor by controlling the rate of neutron production and absorption.

The heat produced by nuclear fission is transferred to a coolant, such as water or gas, which carries the heat to a heat exchanger. In the heat ex

Formula unit is defined as the empirical formula of any covalent or ionic network solid compound which is used as an independent entity for the stoichiometric calculations.

Formula unit is the lowest whole number ratio of ions which represented in an ionic compound.

A molecule consist of two or more elements which are covalently bonded and a formula unit represents the lowest whole number ratio of ions in an ionic compound.

Molecular mass is also termed as molecular weight and it actually indicates the mass of a molecule relative to the carbon-12 atom which has a mass of twelve units. Formula mass of any substance is defined as the sum of atomic masses of constituents atoms in an ionic compound.

Formula mass and molecular mass are basically the same terms but they are uses differently because an ionic compound cannot be a molecule whereas molecules are actually covalent compounds means they have only nonmetals and therefore we can say formula mass when we are taking ionic compounds.

The molecule is made up of two or more elements which are covalently bonded. It is defined as the smallest particle of a covalent substance that has the properties of that particular substance, the smallest particle of that substance which can take participate in a chemical reaction.

Thus, we concluded that formula unit represents the lowest whole number ratio of the ions in an ionic compound.

learn more about formula unit:

https://brainly.com/question/2596742

#SPJ9

The order of marbles can be Aluminum, Nickel, Silver, and Rhenium.

If volume is the amount of three-dimensional space contained by a closed surface, such as the amount of space within a given cube, cylinder, or other three-dimensional shape.

Liquid volume is a way to measure an amount of liquid by describing how much three-dimensional space it occupies.

The mass of something is the amount of stuff it is made of. The volume of an object is the amount of space it usually takes up.

Density provides an easy way to calculate a body's mass from its volume or vice versa.

The mass is equal to the volume multiplied by the density (M = Vd), and the volume is equal to the mass divided by the density (V = M/d).

As per the density given, the volume of aluminum can be 1.11mL, Silver is 0.286mL, Rhenium is 0.144mL, Nickel is 0.337mL.

Thus, the order from largest to smallest will be Aluminum, Nickel, Silver, and Rhenium.

For more details regarding volume, visit:

https://brainly.com/question/1578538

#SPJ2

Types of luminous flames:

1. Yellow Luminous Flame

2. Smoky Luminous Flame

3. Orange Luminous Flame

4. Blue Luminous Flame

Luminous flames are characterized by their visible glow, which is caused by the incomplete combustion of fuel. The presence of soot particles in the flame causes the emission of light. There are different types of luminous flames, which can be classified based on their fuel composition and burning conditions. Here are some common types of luminous flames:

1. Yellow Luminous Flame: This is the most common type of luminous flame, often seen in open fires, candles, and gas stoves. It appears yellow due to the presence of soot particles in the flame. Yellow flames indicate incomplete combustion of hydrocarbon fuels, such as methane, propane, or natural gas. The high carbon content in these fuels leads to the formation of soot, which emits visible light.

2. Smoky Luminous Flame: This type of flame is characterized by a significant amount of black smoke and soot production. It is commonly observed in poorly adjusted or malfunctioning burners or engines. The excessive presence of unburned fuel in the flame results in incomplete combustion and the emission of dark smoke particles.

3. Orange Luminous Flame: An orange flame indicates a higher combustion temperature compared to a yellow flame. It is often seen in more efficient burners or when burning fuels with a higher carbon content, such as oil or diesel. The higher temperature helps in burning more of the carbon particles, reducing the amount of soot and making the flame appear less yellow.

4. Blue Luminous Flame: A blue flame is typically associated with complete combustion. It indicates efficient burning of fuel, resulting in minimal soot formation. Blue flames are commonly observed in gas burners or Bunsen burners. The blue color is a result of the combustion of gases, such as methane, in the presence of sufficient oxygen.

It's important to note that the luminosity of a flame can vary depending on factors such as fuel-air mixture, combustion temperature, and the presence of impurities. Achieving complete combustion and minimizing the production of soot is desirable for efficient and cleaner burning processes.

for more questions on luminous

https://brainly.com/question/27163038

#SPJ8

Explanation:

The number of protons and neutrons. you can simply subtract the number of protons, or atomic number, from the mass number to get your final answer.

Answer:

percent ionization = 50.01%; pH = 4.75

Explanation:

To solve this question we must write the acetic acid equilibrium (Where HX will be acetic acid and X⁻ the sodium acetate):

HX(aq) ⇄ H⁺(aq) + X⁻(aq)

Where equilibrium constant, Ka, is defined as:

Ka = 1.76x10⁻⁵ = [H⁺] [X⁻] / [HX]

Where the concentration of each ion is:

[H⁺] = X

[X⁻] = 0.10M + X

[HX] = 0.10M - X

Replacing in Ka expression:

1.76x10⁻⁵ = [X] [0.10-X] / [0.10+X]

1.76x10⁻⁶ + 1.76x10⁻⁵X = 0.10X - X²

X² - 0.0999824 X + 1.76×10⁻⁶ = 0

X ≈ 0.1M → False solution. Decreases a lot the concentration of HX

X = 0.0000176M → Right solution.

The concentration of each ion is:

[H⁺] = 0.0000176062M

[X⁻] = 0.10M + 0.0000176M = 0.1000176M

[HX] = 0.10M - 0.0000176M = 0.0999824M

Percent ionization:

[X-] / [X-] + [HX] * 100 =

0.1000176M / 0.2M =

And pH = -log [H+]

As you can see, [H+]≈ Ka

Answer:

Try this for answer 3082.24

The balanced molecular equation for the reaction between sodium hydroxide (NaOH) and aluminum chloride (\(AlCl_3\)) in aqueous solution can be written as follows: 2NaOH(aq) + 3\(AlCl_3\)(aq) → 3NaCl(aq) + \(Al(OH)_3\)(s)

In this reaction, sodium hydroxide (NaOH) reacts with aluminum chloride (\(AlCl_3\)) to form sodium chloride (NaCl) and aluminum hydroxide (\(Al(OH)_3\)). The coefficients in the balanced equation indicate the stoichiometric ratio between the reactants and products.

The physical states of the substances are indicated by the symbols (aq) for aqueous solutions and (s) for the solid precipitate.

The reaction is a double-displacement reaction, also known as a precipitation reaction. Double-displacement reactions involve the exchange of ions between two compounds, resulting in the formation of a precipitate.

In this case, sodium hydroxide and aluminum chloride react to form sodium chloride and aluminum hydroxide, with aluminum hydroxide being the white solid precipitate.

It's worth noting that the actual reaction might involve hydrated forms of the compounds, such as NaOH·x\(H_2O\) and \(AlCl_3\)·y\(H_2O\). However, for simplicity, these hydrated forms are not included in the balanced equation.

Overall, the balanced equation represents the chemical reaction between sodium hydroxide and aluminum chloride, showing the reactants, products, and their stoichiometric ratios.

For more such question on balanced molecular equation visit:

https://brainly.com/question/11904811

#SPJ8

Answer:

Neutral

Explanation:

NaCl aqueous solution is formed by NaOH and HCl.

NaOH is a base and HCl is an acid, so they go through neutralization process forming a neutral salt and water.

Answer:

56.96 grams

Explanation:

To find the mass of 1.78 moles of O2, we need to use the molar mass of O2, which is the mass of one mole of O2.

The chemical formula for O2 is O-O or simply O2. The molar mass of O2 is the sum of the atomic masses of two oxygen atoms, which can be found on the periodic table.

The atomic mass of oxygen (O) is approximately 16.00 g/mol. So the molar mass of O2 is:

Molar mass of O2 = 2 x atomic mass of O

= 2 x 16.00 g/mol

= 32.00 g/mol

Therefore, the mass of 1.78 moles of O2 is:

Mass = number of moles × molar mass

= 1.78 mol × 32.00 g/mol

= 56.96 g

So the mass of 1.78 moles of O2 is 56.96 grams.

An appropriate metric prefixes have been used to write the following measurements without use of exponents:

Measurement can be defined as an act or process through which the size, magnitude, dimensions, or distance traveled by a physical object or body is taken, especially for the purpose of an experiment.

Metric prefixes are also referred to as SI prefixes and they can be defined as a series of prefixes to basic units of measurement, especially in the International System of Units (SI).

A conversion factor can be defined as a number that is typically used to convert (change) a number in one (1) set of units to another, either by dividing or multiplying.

In Science, an appropriate conversion factor to an equal value must always be used when it is necessary to perform any mathematical conversion.

1 L = 1 × 10₉ nm

2.3 × 10⁻¹⁰ L = X nm

Cross-multiplying, we have:

X = 1 × 10₉ nm × 2.3 × 10⁻¹⁰ L

X = 0.23 nm

2.3 × 10⁻¹⁰ L = 0.23 nm.

1 g = 1 × 10⁶ μg

4.7 × 10⁻⁶ g = 4.7 μg.

Read more on conversion factor here: brainly.com/question/768963

#SPJ1

Complete Question:

Use appropriate metric prefixes to write the following measurements without use of exponents:

(a) 2.3 × 10⁻¹⁰ L

(b) 4.7 × 10⁻⁶ g

(c) 1.84 × 10² cm.

(d) 16.7 × 10⁶ s.

(e) 1.34 × 10⁻³ m

Answer:

Furthermore, because hydrofluoric acid, HF, loses a proton, H+1, to generate its conjugate in the reaction that is shown above, this reactant can be classified as a Brønsted-Lowry acid, and, consequently, the fluoride ion, F–1, is the conjugate base of this acid.

Explanation:

hope this helps

The formula of the conjugate base of the Bronsted-Lowry acid, HF​ is represented as F⁻.

The Bronsted-Lowry theory can be described as an acid-base reaction where acid and base react with each other and by an exchange of proton acid, produces its conjugate base and the base creates its conjugate acid.

The Bronsted-Lowry concept is actually an extended version of Arrhenius's theory of acid base. According to the Bronsted-Lowry concept, acid is a substance that donates a hydrogen ion or a proton and forms its conjugate base and the base is a substance that accepts proton and produces its conjugate acid.

Bronsted-Lowry acid can be represented as:

Acid ⇄   Conjugate base +   H⁺

The conjugate base of Bronsted-Lowry acid HF can be represented as follows:

HF   ⇄  F⁻ +   H⁺

Therefore, fluoride ion F⁻ is the conjugate base of the Bronsted-Lowry acid HF​.

Learn more about the Bronsted-Lowry concept, here:

https://brainly.com/question/14407412

#SPJ6

Answer:

We need more? What else is in the question? This is unanswerable.

Explanation:

The ratio of final pressure to initial pressure, given that the volume and number of moles of the gas are held constant is 1.31

The following data were obtained from the question:

P₁ / T₁ = P₂ / T₂

P₁ / 308.15 = P₂ / 403.15

Cross multiply

308.15 × P₂ = P₁ × 403.15

Divide both sides by 308.15

P₂ = (P₁ × 403.15) / 308.15

Divide both sides by P₁

P₂ / P₁ = 403.15 / 308.15

P₂ / P₁ = 1.31

Thus, the ratio of final pressure to initial pressure, is 1.31

Learn more about pressure:

https://brainly.com/question/15343985

#SPJ1

The amount of heat released from the system as the pentane cools is 67.5kJ.

To determine the heat released from the system as the pentane cools, we need to consider the heat absorbed or released during each of the phase changes (vaporization and fusion) as well as the heat absorbed or released during the temperature change of the substance in each phase.

The heat absorbed or released during a phase change can be calculated using the enthalpy of vaporization (AHvap) or enthalpy of fusion (AHfus) and the number of moles of substance undergoing the phase change.

The heat absorbed or released during a temperature change can be calculated using the specific heat of the substance and the number of moles of substance and the temperature change.

In this case, we can first calculate the heat absorbed or released during the vaporization of the pentane:

Heat = ΔHvap * moles

Heat = 45.3 kJ/mol * 144.29 g / (58.12 g/mol) = 102.1 kJ

Next, we can calculate the heat absorbed or released during the cooling of the pentane vapor to the melting point:

Heat = specific heat * moles * temperature change

Heat = 168 J/mol K * 144.29 g / (58.12 g/mol) * (117 - (-84)) K = 68400 J = 68.4 kJ

Then, we can calculate the heat absorbed or released during the fusion of the pentane:

Heat = ΔHfus * moles

Heat = 120 kJ/mol * 144.29 g / (58.12 g/mol) = 270 kJ

Finally, we can calculate the heat absorbed or released during the cooling of the pentane from the melting point to the final temperature:

Heat = specific heat * moles * temperature change

Heat = 168 J/mol K * 144.29 g / (58.12 g/mol) * (-84 - (-84)) K = 0 J

The total heat released from the system can be calculated by adding up the heat absorbed or released during each of these processes:

Total heat = 102.1 kJ + 68.4 kJ + 270 kJ + 0 kJ = 440.5 kJ

The correct answer is therefore D) 67.5 kJ.

Learn more about heat absorbed, here:

https://brainly.com/question/12473602

#SPJ1

Answer:

0.5mol

Explanation

Please mark answer as brainliest

\(refer \: to \: the \: attachment.\)

Answer:

China

Explanation:

Answer:

3 Covalent Bonds and 1 Co ordinate Bond

Explanation:

4 bonds are in NH4¹+

NH4¹+ is the ammonium ion, which consists of a central nitrogen atom (N) and four hydrogen atoms (H). Nitrogen is located in group 15 of the periodic table and has 5 valence electrons. Hydrogen, on the other hand, has 1 valence electron.

To achieve a stable electron configuration, nitrogen needs to share electrons with the hydrogen atoms. Each hydrogen atom can form a single bond with the nitrogen atom by sharing its valence electron.

In NH4¹+, all four hydrogen atoms form single bonds with the central nitrogen atom. These bonds are represented by lines connecting each hydrogen atom to the nitrogen atom.

So, NH4¹+ has 4 bonds. Each bond represents a pair of electrons shared between the nitrogen atom and a hydrogen atom. The bonding arrangement ensures that the nitrogen atom has a complete octet (eight valence electrons) and each hydrogen atom has two electrons, following the stable configuration of helium.

The "+1" charge on NH4¹+ indicates that the ion has lost one electron, resulting in a positive charge. However, the number of bonds remains the same regardless of the charge.

Therefore, the correct answer is 4 for the number of bonds in NH4¹+.

Know more about the Ammonium ion here:

https://brainly.com/question/13796846

#SPJ8

Answer:c

=

0.0253 M

Explanation:

Molarity is a measure of a solution's concentration in terms of how many moles of solute it contains per liter of solution.

So, in essence, if you have the number of moles of solute, like you do here, and the total volume of the solution expressed in liters, you can find how many moles of solute you get per liter, i.e. the molarity of the solution.

Keeping in mind the fact that the moles of solute are distributed evenly in any given volume of the solution, you can say that because  

7.98 L

of solution contain  

0.202

moles of solute, which in your case is potassium chloride,  

KCl

,  

1 L

of this solution will contain

1

L

⋅

0.202 moles KCl

7.98

L

=

0.0253 moles KCl

So, if your solution contains  

0.0253

moles of potassium chloride per liter, it follows that its molarity is equal to

c

=

0.0253 M

Here  

M

is equivalent to  

mol/L

, or molar.

The molarity of the solution that contains 0.505 mol KCl in 7.98 L of the solution is 0.0632 moles/L.

Molarity is a measure of a solution concentration in terms of how many moles of solute it contains per liter of solution.

Molarity = Moles of solute / Liters of solution

Its unit is mole/L

Given that a solution contains 0.505 mol KCl in 7.98 L of solution

Moles of solute (KCl) = 0.505 mol

Liters of solution = 7.98 L

Then, the molarity will be

M = \(\frac{0.505}{7.98}\)

   = 0.0632 moles/L

Therefore, the molarity of the given solution is 0.0632 moles/L.

Learn more about molarity here:

https://brainly.com/question/9118107

#SPJ2

The actual yield is also the amount of product you obtained for that % yield

for that we have to calcualte first the theoretical yeild or in other words how mane grams of NaCl would be obtained if all 11.50 grams of Na are conberted into NaCl For that we need the molar mass of Na and NaCl

Mm of Na= 23 g/mol ; Mm of NaCl = 58.5 g/mol.

Which tht information and according to the stechiometry of the reaction we know that 23g of Na produce 58.5 g of NaCl. If we use this information as conversion factor and multipli it by the initial amount of Na we can calculate the theoretical yield:

tho obtain the actual yield we have to multiply the theoretical yield times the percentage yield:

Answer:

Since the 3s if now full we'll move to the 3p where we'll place the remaining five electrons. Therefore the Chlorine electron configuration will be 1s22s22p63s23p5. The configuration notation provides an easy way for scientists to write and communicate how electrons are arranged around the nucleus of an atom.

The branched alkanes in boxes two and three all have molecular formula C6H14 and are isomers of the compound shown.

Isomers are compounds that has the same molecular formula but different structural formulas. Hence, isomers of compounds can be represented by the same molecular formula since they contain the same number of each atom.

The molecule shown has molecular formula C6H14. The branched alkanes in boxes two and three all have molecular formula C6H14 and are isomers of the compound shown.

Learn more about isomers: https://brainly.com/question/1558338

Answer:

A

Explanation:

Answer:

CaCl3 is the limited reagent

Explanation:

The weight of the container after the wax hardens is 0.18 N.

We know that according to the law of the conservation of mass, the mass of an object can neither be created nor destroyed but it can be changed from one form to the other.

Looking at this law, we know that the mass would not change even after the time that the wax must have hardened. The total mass of the wax would have to be a constant.

Total mass would now be;

Mass of the wax + mass of the container

= 3 g + 15 g

= 18 g

Weight = 18/1000 * 9.8 m/s^2

= 0.18 N

Learn more about mass:https://brainly.com/question/13383562

#SPJ1

The percent yield of ammonia in the reaction  is 79.045%

The reaction of the formation of ammonia when hydrogen and nitrogen reacts is as follows:

                  N₂ + 3H₂ -------------> 2NH₃

It is given that 5.18g of Hydrogen gas and nitrogen gas reacted to produce 23.2g of Ammonia. To find the percent yield, the following formula is to be used:

Percent yield = Actual yield/ Theoretical yield x(100)

To calculate the actual yield of Ammonia, we get

Actual yield = (5.18g of H₂/1) x (1 mole of H₂ / 2g of H₂) x (2 moles of NH₃/ 3 moles of H₂) x (17g of NH₃/1 mole of NH₃)

= 5.18 x 0.5 x (34/3)

= 88.06/3

Actual yield = 29.35g

Therefore, the actual yield of ammonia is 29.35g

From this we can calculate the percent yield as follows:

Percent yield = 23.2/29.35 x(100)

Percent yield = 79.045%

Therefore the percent yield if 5.18 g of hydrogen gas and excess nitrogen gas were reacted to produce 23.2 g of ammonia is 79.045%

To know more about Haber's process, click below:

brainly.com/question/21867752

#SPJ9

Answer:

don't know mass? or energy just search

Answer:

true

The water cycle affects the weather and climate of a particular region in multiple ways