hi:) anyone able to explain no.2 of what happens to particles of a solid that is heated until it melts? I don’t understand it. Thanks !

Hey there!

Na + FeBr₂ → NaBr + Fe

Firstly, balance Br.

Two on the left, one on the right. Add a coefficient of 2 in front of NaBr.

Na + FeBr₂ → 2NaBr + Fe  

Next, balance Na.

One on the left, two on the right. Add a coefficient of 2 in front of Na.

2Na + FeBr₂ → 2NaBr + Fe

Lastly, balance Fe.

One on the left, one on the right. Already balanced.

Our final balanced equation:

2Na + FeBr₂ → 2NaBr + Fe

Hope this helps!

Answer:

44.01 g/mol because its basically the weight

Explanation: 12.0107 + 15.9994*2

The gfm (Gram Formula Mass) or molar mass of CO₂ (Carbon Dioxide) is calculated by adding the atomic masses of its constituents: one Carbon atom (12.01 g/mol) and two Oxygen atoms (32 g/mol). This adds up to 44.01 g/mol.

You asked for the gfm (Gram Formula Mass) of CO₂. Gram Formula Mass is another term for molar mass, which is calculated by adding up the atomic masses of all the atoms in the molecule. In the case of CO₂, we have one atom of Carbon and two atoms of Oxygen.

The atomic mass of Carbon (C) is approximately 12.01 g/mol, and that of Oxygen (O) is approximately 16.00 g/mol. Since there are two Oxygen atoms, their combined mass is 2 * 16.00 = 32.00 g/mol.

Adding the atomic masses of Carbon and Oxygen together gives us the total gfm of CO2: 12.01 g/mol (Carbon) + 32.00 g/mol (Oxygen) = 44.01 g/mol (for CO₂).

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the answer is: Ground water is water beneath the earth’s soil stored in soil pore spaces and in fractures of rock formations. :)

Final answer:

Li3N, or lithium nitride, is primarily an ionic compound formed by the transfer of electrons from lithium to nitrogen, resulting in Li+ cations and N3- anions.

Explanation:

The compound Li3N (lithium nitride) is primarily considered to be ionic in nature. Lithium (Li), being in Group 1 of the periodic table, is a metal, and nitrogen (N2), being in Group 15, is a nonmetal. The electronegativity difference between them is significant, which leads to the formation of ionic bonds as lithium donates electrons to nitrogen, forming cations (Li+) and an anion (N3-). Although lithium can form polar covalent bonds due to its high charge density and the polarizing effect it has on its bonding partners, in the case of lithium nitride, the overwhelmingly dominant type of bonding is ionic.

While lithium can form more covalent type bonds in organometallic compounds, when combined with a nonmetal such as nitrogen, the result is an ionic compound. It is important to consider that while the distinction between ionic and covalent bonds is taught, in reality, there is often a continuum with many compounds exhibiting characteristics of both ionic and covalent bonding. However, based on lithium nitride's composition and attributes, it falls closer to the ionic side of the spectrum.

265.2 mmHg is the partial pressure of oxygen in 780 mmHg of total pressure.

Explanation:

The partial pressure of a gas is defined as the individual pressure of the gas in total mixture. In an ideal gas all the constituent gases have partial pressure some of which will give total pressure of the gas.

The partial pressure of a gas is calculated by

total pressure x mole fraction of the gas.

Mole fraction of the oxygen present is 0.34 as it is 34% of the total gas.

[tex]\frac{34}{100}[/tex] = 0.34  is the mole fraction

Total pressure is given as 780 mm Hg

The partial pressure can be calculated using the above formula:

Putting the values in equation:

780 x 0.34

= 265.2 mm Hg is the partial pressure of oxygen.

Answer:

1258 grams of AgN03

Explanation:

We calculate the weight of 1 mol of AgN03:

Weight 1 mol AgN03= Weight Ag + Weight N +( Weight 0)x3=108g+ 14g+16gx3=170 g/mol

1 mol----170 g AgN03

7,4mol---x= (7,4 mol x170 g AgN03)/1 mol=1258 g AgN03

Answer:

A

Explanation:

heat energy is transfered through a hot object touching a cold object

Final answer:

Heat energy is the transfer of energy due to a temperature difference between two systems, such as from a warm hand to a colder ice cube. This transfer occurs spontaneously and can result in the change of state of matter, like melting. Heat flows from a higher to a lower temperature and can play a role in various chemical and physical processes.

Explanation:

Energy transfer due to a temperature difference is known as heat energy. This kind of energy transfer occurs because heat is the spontaneous transfer of energy that happens when there is a difference in temperature between two systems. For instance, when an ice cube is held in your hand, the heat from your hand is transferred to the ice cube, causing it to melt.

Thermodynamically, heat energy is the energy that is transferred from one system to another that is not work. This might occur during various processes, such as when electrical energy is converted into light energy in a light bulb and some energy is lost as heat, or during cellular metabolic reactions. Additionally, matter has thermal energy due to the kinetic energy (KE) of its molecules, and temperature corresponds to the average KE of those molecules. Heat energy flows from a higher to a lower temperature, and it can be absorbed or released during chemical and physical processes.

Answer:

Explanation:

The reaction is:

       [tex]PCl_5(g)+heat\rightleftharpoons PCl_3(g)+Cl_2(g)[/tex]

The application of LeChatelier's principle leads to consider the heat as a reactant or a product depending on if it is on the left side or the right side.

In this reaction, the heat is on the left side, thus it must be considered a reactant.

Decreasing the temperature is equivalent to remove or consume heat. Thus, the reaction must shif to the left to compensate that reduction of heat. That is the reverse reaction shall be favored.

In conclusion, there will be a shift toward the reactants.

Answer:

100 atm

Explanation:

Answer:

Option B. 100atm

Explanation:

The following data were obtained from the question:

n = 2moles

V = 0.5L

T = 310K

R = 0.0821 L.atm/mol.K

P =?

The pressure can obtained by doing the following:

PV = nRT

P = nRT /V

P = (2 x 0.0821 x 310)/0.5

P = 100atm

Answer: true

Explanation: matter can’t be created or destroyed, none the less

Hey there!

Molar mass of CaCl₂:

Add the molar masses of each element multiplied by the amount of that element we have.

Ca: 1 x 40.078

Cl: 2 x 35.453

---------------------

           110.98 grams

The molar mass of calcium chloride is 110.98 grams.

Hope this helps!

The molar mass of Calcium Chloride (CaCl2) is 111.0 grams per mole.

To calculate the molar mass of calcium chloride, which is represented by the formula CaCl2, you must add the molar masses of calcium (Ca) and chlorine (Cl) atoms. Calcium has a molar mass of 40.0 grams per mole, while chlorine has a molar mass of 35.5 grams per mole. Since there are two chlorine atoms in calcium chloride, you must multiply the molar mass of chlorine by 2. Therefore, the total molar mass of calcium chloride is the sum of the molar mass of calcium plus two times the molar mass of chlorine: Ca (40.0 g/mol) + 2 × Cl (35.5 g/mol) = 111.0 g/mol.

Answer:

14.64 grams of carbon

Explanation:

The Molecular formula of Glucose is C₆H₁₂O₆.

From the molecular formula, the Molar mass of Glucose is,

Mass of Carbon in Glucose = 6*12 = 72.

Mass of Hydrogen in Glucose = 12*1 = 12.

Mass of Oxygen in Glucose = 6*16 = 96.

Molar mass of Glucose = 72+12+96 = 180 grams.

180 grams of Glucose contains 72 grams of Carbon.

How many grams of Carbon are there in 36.6 grams of Glucose.

180 --> 72

36.6 --> ?

Let it be 'x' grams

Then, by Criss Cross, (x)(180) = (36.6)(72) => x = 14.64 grams.

Therefore 14.64 grams of carbon are there in 36.6 grams in glucose.

Answer:

D

Explanation:

Answ

D

Explanation:

Any ones whos job requires chemical

Theoretical yield is 216.88 grams when reacting with 100.0 grams of Cl2 with excess CS2.

Explanation:

Theoretical yield is the complete conversion of a limiting reagent in product.

In the equation given

3Cl2 +  CS2 ⇒ CCl4

100 grams of Cl2 will give

number of moles = [tex]\frac{mass given}{atomic mass}[/tex]

                             = [tex]\frac{100}{70.906}[/tex]

                              = 1.41 moles

3 moles of Cl2 gives 1 mole of CCl4

1.41 moles of Cl2 will give x moles of CCl4

[tex]\frac{1}{3}[/tex] = [tex]\frac{x}{1.41}[/tex]

0.47 moles of CCl4 is formed

Theoretical yield is 0.47 x 153.82

= 216.88 grams.

 100 gram of Cl2 is the limiting reagent in the reaction which produced 216.88 grams of CCl4.

Answer:

Answer is D

Explanation:

xrays would be far more efficient at detecting objects through solids.

X-rays would be best because they are high-energy waves that can penetrate solids ( D )

X-rays have shorter wavelengths and higher frequency when compared to radio waves therefore they have higher energy which is required to penetrate solids at the Airport.

Therefore X-rays would be a better suited electromagnetic wave to be used by Airport security to see items inside a luggage.

Hence we can conclude that The type of electromagnetic wave that would be the best for airport security to use is  X-rays.

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Explanation:

your protons will likely go towards (2)

leaving you with

FSbF6^-2+ H2C6H4C4

Answer:a

Explanation: duh man

Answer:

To answer your first question, when the outer layer of aluminum interacts with oxygen, it forms an aluminum oxide layer that is passive. While the outer layer corrodes, it provides a protective coating that protects the inner layer from further deterioration. As a result, aluminum corrosion is beneficial.

To answer your second question, corrosion of iron is a serious problem because almost all things in our civilization is made of iron or one of its alloys, from automobiles to homes, tools to prosthetics.

When you look back at the past of corrosion research, you'll notice that it all began with the question "why does iron rust?" The most powerful organization of corrosion engineers, NACE, crunched the numbers, and the total amount of iron (only in the United States) is in the billions!

When you consider how inexpensive iron is in comparison to other metals, you can see why it is so widely used; and when you consider all of the developments in metallurgy over the last century, you can see how scientists have worked to improve its sturdiness: new alloys with improved corrosion resistance and strength; treatments to postpone corrosion and even attempt to replace it.

Explanation:

I deeply apologize if this is a late or overdue answer. I also hope this answers your original question and if it doesn't, I deeply apologize.

Other than that, I hope this was helpful and I hope you have a pleasant evening :)

Answer:

101333.33mmHg

Explanation:

The following were obtained from the question:

P1 = at stp = 760mmHg

V1 = 400.0cu.ft

V2 = 3cu.ft

P2 =?

Using Boyle's law equation, we obtained:

P1V1 = P2V2

760 x 400 = P2 x 3

Divide both side by the 3

P2 = (760 x 400) /3

P2 = 101333.33mmHg

The gas must b compressed to a pressure of 101333.33mmHg

Answer:

1. relative time

2.absolute time

Explanation:

Time that is measured in definite periods such as minutes, days, and years is called

a. Relative time.

b. absolute time.

Answer: 3.06m/s

Explanation:

Distance covered by swimmer = 220 m

Time taken by swimmer = 72 s.

Velocity = ?

Recall that velocity is the rate of change of distance per unit time. it is measured in metres per second.

Velocity = Distance / time taken

Velocity = 220m / 72seconds

Velocity = 3.055 m/s (approximate to 3.06m/s)

Explanation:

hydrogen + oxygen = water

Word equation that shows hydrogen reacting with oxygen to form water is Hydrogen + oxygen → Water

In a chemical reaction the compounds that are present in the left hand side of the reaction is reactants and those present on the right hand side are products.

Given options are-

O oxygen + water → hydrogen

O hydrogen + oxygen→ Water

O oxygen + water → hydrogen + 'water

O hydrogen + water → oxygen

Therefore, Word equation that shows hydrogen reacting with oxygen to form water is Hydrogen + oxygen → Water.

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Answer:

The density of the gas is 0.00125 g/cc and the gas is Air.

Explanation:

Given,

mass of gas = 1.25 grams

Volume = 1000 cc.

Density = ?

Density of the gas can be found by using the formula

Density = Mass/Volume

Substituting the values we get,

Density = 1.25/1000 = 0.00125 g/cc.

The gas is air because at room temperature and pressure air has a density of 0.00125 g/cc.

Answer:

NH3 + H2SO4 ---> ((NH4)2)SO4 + H2O

Explanation:

This is a common reaction; ammonia and sulfate make ammonium sulfate and the excess hydrogen and oxygen(not part of a polyatomic ion) get into the form of H2O

I hope this helps!

(This can commonly be confused as double replacements but hydrogen is in both reactants.)

Answer:

340.8mL

Explanation:

The following data were obtained from the question:

P1 = 740.0mmHg

V1 = 350.0mL

P2 = at stp = 760mmHg

V2 =?

Using Boyle's law equation P1V1 = P2V2, we can easily find the new volume as illustrated below:

P1V1 = P2V2

740 x 350 = 760 x V2

Divide both side by 760

V2 = (740 x 350) /760

V2 = 340.8mL

The new volume is 340.8mL

To convert the volume at a different pressure to its new volume at standard pressure, use Boyle's Law. Substituting the given values into the equation, the new volume at standard pressure is 343.42 mL.

To convert the volume at a different pressure to its new volume at standard pressure, we can use Boyle's Law. Boyle's Law states that the pressure and volume of a gas are inversely proportional at constant temperature.

We can use the equation:

P1V1 = P2V2

Where P1 and V1 represent the initial pressure and volume, and P2 and V2 represent the new pressure and volume. Rearranging the equation, we get:

V2 = (P1V1) / P2

Substituting the given values into the equation, we have:

V2 = (740.0 mmHg * 350.0 mL) / (760.0 mmHg)

V2 = 343.42 mL

Therefore, the new volume at standard pressure is 343.42 mL.

Answer:

Polarizing Power is the basis of Fajan's rules of covalent character generally in ionic compounds.

Charges and radius are a function of Polarizing Power, because the higher the charge is, the larger the polarizing power is for cations with the same radius. Also the smaller the radius is, the larger the polarizing power is for cations with the same charge.

Explanation:

Answer:

The amount of electrons in each atom of the element

Explanation:

Answer:

The amount of electrons in each element of the atom.

Answer:

B)

Explanation:

The layers of the atmosphere are classified by changes in temperature in accordance with height.

Answer:

Use Hooke's law

Explanation:

Answer:

Tungsten atom has 6 energy level

Explanation:

6 energy levels of tungsten atom

Energy level 1 - 2

Energy level 2 - 8

Energy level 3 - 18

Energy level 4 - 32

Energy level 5 - 12

Energy level 6 - 2

What's a tungsten atom

Is a chemical element with the symbol W and with an atomic number 74.

Answer:

D

Explanation:

the answer is d as the law of conservation must be hold good during the equation