What happens to the arrangement of particles during melting?

When sulfuric acid is combined with sugar, gas is released and a tall black column forms. This is an example of a Dehydration Reaction.

A Dehydration reaction is defined as a chemical reaction that involves the loss of water from the reacting molecule or ion. Dehydration reactions is the reverse of a hydration reaction. Concentrated sulfuric acid can perform a dehydration reaction with table sugar. After mixing, the color changes from white to brownish and eventually to black. The expansion of the mixture is the result of vaporization of water and CO2 inside the container. The gases inflate the mixture to form a snake-like shape and give off a burned sugar smell. The granularity of the sugar can greatly affect the reaction. powdered sugar reacts very quickly but sugar cubes take longer to react.

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Answer:

mechanical energy

For lemonade titration 0.003952 mol is required which is 3 times the 0.001369 mol which is for citric acid titration.

Phenolphthalein has properties that make it suitable for use in tritation, including the fact that it turns pink in basic solutions but is colourless in acidic conditions.

This implies that the colour of the solution being tritraed will change at the equivalence point (really, just a tiny quantity of the solution is added after reaching the equivalence point).

The triated solution will remain colourless with the phenolphtalein and turn pink at the equivalence point if the solution being triated is an acid.

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1. Reduction half reaction (or cathode reaction):-

Ag+(aq)  +  e-  ---------> Ag(s)..........(1)

2. Oxidation half reaction (or anode reaction) :-

Sn(s) --------> Sn2+(aq) + 2e-  ............(2)

3. Overall reaction :-

2*(1) + (2)

or, 2Ag+(aq) + Sn(s)  --------> 2Ag(s) + Sn2+(aq)

A galvanic cell, often known as a voltaic cell after the scientists Luigi Galvani and Alessandro Volta, is an electrochemical cell in which an electric current is created by spontaneous Oxidation-Reduction events. A voltaic cell is an electrochemical cell that uses a chemical process to generate electrical energy. The oxidation and reduction processes are split into half-cell sections.

To create an electric current, galvanic (or voltaic) cells employ a thermodynamically advantageous redox process. Each half-reaction occurs in its own compartment, or half-cell, which contains an electrode. The anode is the electrode where oxidation happens, while the cathode is the electrode where reduction occurs.

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The formulas for the coordination compounds are as follows:

(a) Potassium hexacyanoferrate(II)

The coordination complex is [Fe(CN)6] and it has a charge of -4. The counter-ion is potassium (K+). Therefore, to balance the charge, we need four potassium ions. So, the formula for potassium hexacyanoferrate(II) is K4[Fe(CN)6].

(b) Sodium diamminedicarbonatoruthenate(III)

The coordination complex is [Ru(NH3)2(CO3)2] and it has a charge of -1. The counter-ion is sodium (Na+). Therefore, to balance the charge, we need one sodium ion. So, the formula for sodium diamminedicarbonatoruthenate(III) is Na[Ru(NH3)2(CO3)2].

(c) Pentaamminechlorochromium(III) chloride

The coordination complex is [Cr(NH3)5Cl] and it has a charge of +2. The counter-ion is chloride (Cl-). Therefore, to balance the charge, we need two chloride ions. One chloride is already in the complex, so we only need one more outside of the complex. So, the formula for pentaamminechlorochromium(III) chloride is [Cr(NH3)5Cl]Cl.

Answer:

Be Electron configuration: 1s2 2s2

Be Orbital Diagram: \//\    \//\ (it would be little arrows going up and down to show the spins)

F Electron Configuration: 1s2 2s2 2p5

F Orbital Diagram: \//\    \//\    \//\ \//\ \/

Answer:

2+

Explanation:

Apex lolz

False. Lipids are hydrophobic, which means they do not dissolve in water. This is because lipids are non-polar molecules and water is a polar solvent.

However, lipids can dissolve in other non-polar solvents such as oils and fats.
False. Lipids are actually hydrophobic, meaning they do not dissolve in water. Hydrophilic substances, on the other hand, do dissolve in water.

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Micas is the silicate group that has tetrahedron arranged in sheets. Micas belong to a group of silicate minerals known as phyllosilicates or sheet silicates.

In phyllosilicates or sheet silicates, the tetrahedral silicate units are arranged in sheets or layers. The sheets consist of interconnected tetrahedra, with each tetrahedron sharing three oxygen atoms with adjacent tetrahedra. The remaining oxygen atom in each tetrahedron is bonded to other elements such as aluminum or magnesium.

The sheet structure of micas gives them unique properties, including a characteristic sheet-like cleavage and the ability to split into thin, flexible flakes. This property is exploited in the commercial use of micas in products like electrical insulators, heat shields, and decorative materials.

Olivine, Amphiboles, and Feldspars do not have tetrahedral arrangements in sheets. Olivine is a silicate mineral with a three-dimensional structure, while Amphiboles and Feldspars have more complex crystal structures that do not involve tetrahedral sheets.


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Answer:

Tricarbon octahydride has the formula C 3 H 8.This means it has three carbon atoms and eight hydrogen atoms.

Explanation:

Answer:

C3 H8

uR wElCOme

the reason for adding vinegar, which is mostly water and approximately 5% acetic acid (CH3COOH), to a reaction is to create an acidic environment.

This is important for certain chemical reactions because it helps to control the pH and improve the efficiency of the reaction. Acetic acid acts as a weak acid, meaning it can donate a hydrogen ion (H+) to the solution, this increase in H+ ions lowers the pH, making the environment more acidic. Acidic conditions can be necessary for specific reactions, such as those involving enzymes or catalysts that require a particular pH range to function optimally.

Additionally, adding vinegar can help drive certain reactions forward by providing a source of protons, which are needed in various acid-base reactions. Furthermore, the use of vinegar is convenient, safe, and cost-effective, making it an ideal choice for household or educational purposes. In summary, vinegar is added to reactions to create an acidic environment that is beneficial for various chemical processes, ensuring efficient and successful outcomes.

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Answer:

As the car starts to slide down the ramp, it is kinetic energy and when it's on the top of the ramp,  it is potential energy. We can see that the energy is now being transferred through the car and ramp.

Explanation:

We know that,

1 mile = 1609.34 m

We need to find how many meters are present in the 12.45 miles. To find it use unitary method as follows :

12.45 mile = 1609.34 × 12.45

12.45 mile=20036.283 meters

or

\(12.45\ mile=2.0036\times 10^4\ m\)

Hence, this is the required solution.

Answer:

hi

Explanation:

Answer:

From the 2, I believe it is called a community.

Answer:

d

Explanation:

it just makes sense

Answer:

Cold temperatures!

Explanation:

Both planets are very far from the sun, now to explain how the other answers would fit or just dont make sense, No rings, the answer isn't the best fitting answer for this question, 27 moons, this is wrong because neptune has 14 moons, only uranus has 27. No axis tilt, this answer is wrong because both planets have an axis.

Answer:

its B

Explanation:

Firstly you need to know the composition of salt.

Salt is made of Sodium and Chloride and is ionically bonded.

Ionic bonding is a type of chemical bonding that involves electrostatic attractions between oppositely charged ions ( e.g Na+ and Cl-).

Therefore salt is bonded by ionic bond.

45.784 grams of water will be formed when 39 g hydrogen is mixed with 49.6 g oxygen.

The balanced reaction for the above reaction is given as:

2 H₂ + O₂ → 2 H₂O

By the relationship between the amount of reagents and products in a chemical reaction, we can conclude that the following amounts of each compound participate in the reaction:

H₂: 2 moles

O₂: 1 mole

H₂O: 2 moles

the molar mass of the compounds are as follows:

H₂: 2 g/mole

O₂: 32 g/mole

H₂O: 18 g/mole

Then, by the reaction stoichiometry, the following amounts of reactant and product mass participate:

For H₂: 2 moles × 2 g/mole = 4 g

For O₂: 1 mole × 32 g/mole = 32 g

For H₂O: 2 moles × 18 g/mole = 36 g

The limiting reagent of the reaction is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, at that time the chemical reaction will stop.

Since we have less mass than we need to react with 39 grams of H₂, oxygen O₂ will be the limiting reagent.

Then we can apply the following rule of three: if by stoichiometry 32 grams of O₂ form 36 grams of H₂O, 49.6 grams of O₂ will produce H₂O is:

mass of H₂O = (49.6 grams of O₂ × 36 grams of H₂O) / 39 grams of O₂

mass of H₂O = 45.784 grams

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Answer:

In the United States today, no federal law prohibits human cloning, either for purposes of reproduction or for purposes of biomedical research.

Explanation:

65 grams of oxygen is approximately equal to 2.03125 moles.

To convert 65 grams of oxygen to moles, we need to use the molar mass of oxygen (O₂), which is approximately 32.00 g/mol. Oxygen exists as a diatomic molecule (O₂), so we use the molar mass of O₂ to convert from grams to moles.

The formula for converting grams to moles is:

Moles = Mass (in grams) / Molar mass (in grams per mole)

Given:

Mass of oxygen = 65 grams

Molar mass of oxygen (O₂) = 32.00 g/mol

Moles of oxygen = 65 grams / 32.00 g/mol

Moles of oxygen ≈ 2.03125 moles

Therefore, 65 grams of oxygen is approximately equal to 2.03125 moles.

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The end of a very long 5-mm-diameter rod is held at 124°C. The surface of the rod is exposed to ambient air at 30°C, with a convective heat transfer coefficient of 100 W/m2K. Determine the temperature at a radial distance of 2.5 mm from the rod's center. The thermal conductivity of the rod is 15 W/mK.b) What is the temperature gradient in the rod at this location?c).

What is the heat flux at this location?The temperature at a radial distance of 2.5 mm from the rod's center is 79.58°C.The solution for this problem can be found by following the steps below:Solution:a) The temperature of the rod, T, can be calculated using the formula for one-dimensional conduction:q/A = -k (d T/d r)whereq is the heat flux,A is the cross-sectional area of the rod,r is the radial distance from the center of the rod,k is the thermal conductivity of the rod,and T is the temperature of the rod.

Taking the boundary condition into account,T(r=0) = 124°CandT(r=2.5 mm) = 30°C, the solution to the differential equation is:T = T0 + (T1 - T0) (r/R)2whereT0 = 30°CT1 = 124°CR = 2.5 mm/2 = 1.25 mmso,T = 30 + (124 - 30) (r/1.25)2 = 30 + 78 (r/1.25)2at r = 2.5 mm,T = 79.58°Cb) The temperature gradient, d T/d r, is given by the derivative of the above equation:d T/d r = 124 (r/1.25)2 / 1.25where d T/d r = 98.72°C/mat r = 2.5 mmc) The heat flux, q/A, is given by the Fourier's law of heat conduction:q/A = -k (d T/d r)whereq/A = -15 (98.72/1000) = -1.48 W/m2at r = 2.5 mmTherefore, the temperature at a radial distance of 2.5 mm from the rod's center is 79.58°C, the temperature gradient in the rod at this location is 98.72°C/m, and the heat flux at this location is -1.48 W/m2.

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The volume of dry hydrogen gas collected at STP is 33.6 liters.

When aluminum reacts with acid, it undergoes a single replacement reaction to form aluminum salt and hydrogen gas. The balanced chemical equation for the reaction is:

\(2Al + 6HCl \rightarrow 2AlCl_3 + 3H_2\)

From the equation, we can see that 2 moles of aluminum react with 6 moles of hydrochloric acid to produce 3 moles of hydrogen gas. The molar mass of aluminum is 26.98 g/mol and the molar mass of hydrogen is 1.008 g/mol.

First, we need to calculate the number of moles of aluminum in the sample:

0.885 g / 26.98 g/mol = 0.0328 mol Al

Next, we can use the mole ratio from the balanced chemical equation to find the number of moles of hydrogen gas produced:

\($\frac{3\ \text{mol H}_2}{2\ \text{mol Al}} = 1.5\ \text{mol H}_2$\)

Finally, we can use the ideal gas law to find the volume of dry hydrogen gas produced at standard temperature and pressure (STP):

PV = nRT

where P = 1 atm, V is the volume of gas, n = 1.5 mol, R = 0.08206 L atm/mol K (gas constant), and T = 273.15 K (standard temperature)

\($V = \frac{nRT}{P} = \frac{(1.5\ \text{mol})(0.08206\ \text{L}\cdot\text{atm/mol}\cdot\text{K})(273.15\ \text{K})}{1\ \text{atm}} = 33.6\ \text{L}$\)

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Yes, The internal pressure can be greater than the external pressure.

Internal pressure can be greater than external pressure because the pressure inside a closed environment can increase due to the factors like changes in the temperature, volume or even the change in the pressure outside can be a factor relating to the increase of internal pressure, which can be figured out by using Boyle's law.

For Example, we can consider a rice cooker, when we cook rice we use a rice cooker because it uses the pressure inside to cook the rice quickly and more efficiently. When the rice cooker is turned on it starts to boil the water inside but the water couldn't escape that closed container which results in the increase of the internal pressure which is indeed greater than the external pressure.

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The height of the mercury column increases if we increase the atmospheric pressure.

Well, we know that 1 atmosphere pressure will support a column of mercury that is 760mmhg .

There will only be 50 tons of air above your head if you ascend to, say, half the height of the atmosphere. As a result, the pressure has increased to 50000 pascal while the force has decreased to 50000 N.

As you can see, pressure has dropped as you've climbed higher. Now the mercury in the barometer experiences the same thing. On the ground, it is pushed with a force of, let's say, x, but halfway through the atmosphere, it will be pushed with a force of, let's say, x/2, and as a result, the barometer will rise less.

And thus the  mercury column, the mercury barometer, is an excellent means to monitor atmospheric pressure, or pressures lower than that of atmospheric pressure.

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A good starting point for citation chaining would be a relevant and well-cited article or book that directly relates to your research the topic.

This article or book should have a comprehensive bibliography or  the reference list that you can use to find additional sources. By examining the references cited in the original article, you can identify the other articles and books that are likely to be relevant to your research. Then, you can examine the references in those articles to find even more sources, continuing the process until you have a comprehensive set of relevant sources for your research.

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Answer: The temperature of the gas at a pressure of  0.987 atm and volume of 144mL is \(25.16^0C\)

Explanation:

The combined gas equation is,

\(\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}\)

where,

\(P_1\) = initial pressure of gas = 0.947 atm

\(P_2\) = final pressure of gas = 0.987 atm

\(V_1\) = initial volume of gas = 150 ml

\(V_2\) = final volume of gas = 144 ml    

\(T_1\) = initial temperature of gas = \(25^0C=(25+273.15)K=298.15K\)

\(T_2\) = final temperature of gas = ?

Now put all the given values in the above equation, we get:

\(\frac{0.947\times 150}{298.15}=\frac{0.987\times 144}{T_2}\)

\(T_2=298.31K=(298.31-273.15)^0C=25.16^0C\)

The temperature of the gas at a pressure of  0.987 atm and volume of 144mL is \(25.16^0C\)

Most reactions are carried out in liquid solution or in the gaseous phase because it is easier for reactants to come in contact with each other. Thus, option B is correct.

A gaseous phase is a type of phrase that refers to the state of matter in which gas molecules occupy space. They are highly compressible and highly expandable. In a gaseous state, the gas molecules are in motion and may disperse uniformly in a container.

When compared to the solid and liquid phases, the gaseous phase is much lighter. The forces acting between the gas molecules are relatively small, allowing them to disperse and fill the whole available space. It is easier for reactants to come in contact with each other in a liquid solution or in the gaseous phase.

The main reason for this is that the molecules in the gaseous state are highly separated and possess a huge amount of kinetic energy, which allows them to move around quickly. Thus, option B is correct.

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Density is defined as the mass divided by volume.

Density is also known by the name of viscosity.

Density is denoted by D.

It's unit is basically denoted by kg/m^3.

The density of the block is 0.42 g/cm^3.

The formula of the density is, Density = mass (m) / volume (v)

Now, it is given in the word problem that,

Mass of pine wood = 27g

Volume = 4^3 = 64 cm^3

Thus, Density = 27 g /64 cm^3 = 0.42 g/cm^3.

Hence, the density of the block of pine would be 0.42 g/cm^3

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