If you have 155 mL solution of a 0.762 M FeCl3 solution, how many
moles of FeCl3 are contained in this sample?

Answer:

Upwelling! Its the process where the deep cold water rises to the surface! :)

Explanation:

Hope this helps! :)

Answer:

upwelling

Explanation:

Answer:

i) The size of X ion is greater than that of X atom even though both contain the same number of protons because the ion has fewer electrons compared to the atom. When an atom forms an anion (negative ion), it gains electrons, which causes increased electron-electron repulsion. This repulsion causes the electron cloud to expand, and as a result, the ion becomes larger than the neutral atom.

In the case of element X, when it forms an ion with a -3 charge, it will gain 3 more electrons, increasing the total number of electrons to 18. This will cause the size of the X ion to be larger than the neutral X atom.

ii) To determine the compound of X in the -3 oxidation state, we first need to determine the element's identity. We know that X has 15 electrons in total (2 in the K shell, 8 in the L shell, and 5 in the M shell). Therefore, X has an atomic number of 15, which corresponds to phosphorus (P).

Since phosphorus is in the -3 oxidation state, it gains 3 electrons and becomes P^3-. To form a compound, we need a cation that can balance the negative charge. A common example is aluminum (Al), which has a +3 charge (Al^3+). When phosphorus and aluminum combine, they form the compound aluminum phosphide with the formula AlP.

Answer

V2 = 10.4 L

Explanation

Given:

Volume 1 = 12.4 L

Volume 2 = ?

Temperature 1 = 23°C = 296 K

Temperature 2 = 40°C = 313 K

Pressure 1 = 0.956 atm

Pressure 2 = 1.20 atm

Required: Volume 2

Solution:

The equation to solve this problem is the following:

V2 = (P1 x V1 x T2)/(T1 x P2)

V2 = (0.956 x 12.4 x 313)/(296 x 1.20)

V2 = 10.4 L

Sally is wrong because copper is less electropositive than hydrogen, thus, can not displace hydrogen from dilute acids.

The reactions to prepare copper (ii) chloride are:

the chlo­ri­na­tion of cop­per sul­fide at a high tem­per­a­ture

reaction of copper (ii) oxide with dilute hydrochloric acid

The equations of the given reactions are as follows:CuS + Cl₂ ---> CuCl₂ + SCuO + 2HCl ----> CuCl₂ + H₂O

Reactive metals are metals that readily give up their electrons to form positive ions.

Reactive metals displace hydrogen from dilute acids. They are found in group 1A and 2A of the periodic table. Copper is not a reactive metal and will not displace hydrogen from acids.

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Sally is wrong because copper chloride is not made from the reaction of copper and dilute hydrochloric acid.

2. Copper (ii) chloride can be prepared as follows:

3. the equations of the reaction are:

Single replacement reactions are reactions in which a more reactive atom replaces another atom in a compound.

An example of a single replacement reaction is the reaction of chlorine gas with copper sulfide at high temperatures to form copper chloride.

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Answer:

The charge that is typical for ions of the alkaline earth metals is +2

Explanation:

Group 1 elements (alkali metals such as Li, Na, K...) all have one valence electron that they donate when forming ionic bonds. This will cause them to have a charge of +1.T he alkaline earth metals (Ca, Mg) have two valence electrons they donate which means their charge when forming ions is +2. The members of the aluminum family lose three electrons giving them a charge of +3.

Considering the formal charges, the lewis structure in which the electronegative atom (O) contains a negative charge and the electropositive (N) contains a positive charge represents bonding in the N₂O. Therefore, option (B) is correct.

A formal charge in chemical bonding can be described as the charge assigned to an atom in a molecule by considering that electrons in all chemical bonds are equally shared between atoms, regardless of relative electronegativity.

The formal charge can be described as the difference between the number of valence electrons of an atom in a neutral state and the number assigned in a Lewis structure to that atom.

When determining the best Lewis structure for a molecule, the structure is selected such that the formal charge is as close to zero on each atom.

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The solubility of a substance, such as sugar, depends on several factors, including temperature, pressure, and the presence of other solutes. In this case, the student adds the same amount of sugar and tea bag to the same amount of hot water every day, but the temperature of the water could vary from day to day, affecting how much sugar dissolves.

According to the graph, the least amount of sugar dissolved on day 3, while the most sugar dissolved on day 5. The difference in temperature on these days could explain this variation. On day 3, the water may have been cooler, making it more difficult for the sugar to dissolve. On the other hand, on day 5, the water may have been hotter, which could have increased the solubility of the sugar.

To increase the amount of sugar that dissolves in the tea, the student could try using hotter water or stirring the sugar more vigorously to distribute it evenly throughout the water. Alternatively, the student could try adding the sugar gradually while stirring to give it more time to dissolve before adding more.

Answer:

I'm not 100% sure on this because mine hasn't been graded yet, but here are the answers I submitted.

Explanation:

Which day the least sugar dissolved and which day the most sugar dissolved:

Day 4 is when the least sugar dissolved, and Day 2 is when the most sugar dissolved.

What could have caused less sugar to dissolve on some days:

The temperature of the tea could have caused the sugar not to dissolve on some days.

What the student could do to his drink to make more sugar dissolve.

The student would need to add the sugar to the tea as soon as it's done boiling.  The Sugar will dissolve faster in a warmer tea due to more energy of movement.  

Be sure to stir the tea as you add the sugar.  Stirring the sugar into the tea speeds up the rate of dissolving by helping distribute the sugar particles throughout the tea.  

If the student were to use granulated sugar, those are smaller particles and have greater surface area.  Greater surface area allows for more contact between the tea and the sugar.

Answer:

3 Ca(OH)2 + 2 K3PO4 ---> Ca3(PO4)2 + 6 KOH

Explanation:

Just balance each atom on both sides.

Answer:

About 14.45 seconds

Explanation:

If a object is going 4.5m/s and its destination is 65m then you need to divide.

65÷4.5 = 14.444444

due to the constant 4 you need to round 14.444 so it would be 14.45 seconds.

Nuclear fission is a process where a heavy atomic nucleus is split into two or more lighter nuclei, releasing a large amount of energy.

1.Uranium-235 fissioned by neutron:

U-235 + neutron → Kr-92 + Ba-141 + 3 neutrons + energy

2.Plutonium-239 fissioned by neutron:

Pu-239 + neutron → Sr-95 + Zr-139 + 2 neutrons + energy

3.Californium-252 fissioned by neutron:

Cf-252 + neutron → 2 Sm-126 + 3 neutrons + energy.

Nuclear fission is a process in which a heavy atomic nucleus (such as uranium-235, plutonium-239, or californium-252) is split into two or more lighter nuclei (such as krypton-92 and barium-141), along with the release of a large amount of energy in the form of radiation and kinetic energy of the resulting particles. This process is typically initiated by the absorption of a neutron by the heavy nucleus, which causes it to become unstable and split apart.

In the fission reaction, the mass of the products is slightly less than the mass of the reactant nucleus, due to the conversion of some mass into energy according to Einstein's famous equation \(E=mc^2\), where E is the energy released, m is the mass lost, and c is the speed of light.

The energy released in nuclear fission reactions is much greater than that released in chemical reactions, making nuclear fission an attractive source of energy for power generation. However, fission reactions can also be dangerous if not properly controlled, as the released energy can cause explosions or release dangerous radiation.

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Answer:

not dependent on light, light independent

Explanation:

Calvin's Cycle is a process where plants and algae use CO2 in the air into glucose. They do not need to be dependent on light to produce glucose (in other words not involving photoexcitation, the process of production using light).

Answer:

A.

Explanation:

Opposite charged particles attract.

Particles of same charge are repelled.

Answer:

attracts opposites (a)

Explanation:

The concentration of the solution is 0.3 mol/L.

We know that concentration is the amount of substances that is present. We know that the concentration can be measured by the use of several units and one of the units that we can be able to use is the  mol/L.

We have that the concentration in w/w is 5.0% and this means that the mass of water in the solution is 5g. From the density of the solution;

volume = mass/density

= 5g/  1.000 g/mL

= 5 mL or 0.005 L

Number of moles of sugar = 5g/342.30 g/mol

= 0.015 moles

Concentration = Number of moles/volume

=  0.015 moles/0.005 L

= 0.3 mol/L

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Answer:

b

Explanation:

The figures of a number that are noteworthy in high accuracy or precision are known as significant figures. They are as follows:

From the given information:

To (3) sig. fig: 5578 L = 558 L

Answer:

Kc = 3.94

Explanation:

CH₃COOH(g) + C₂H₅OH(g) → CH₃COOC₂H₅(g) + H₂O(g)

Liquids aren't included in the equilibrium constant, but at 100°C, all four compounds are a gas.  So the equilibrium equation is:

Kc = [CH₃COOC₂H₅] [H₂O] / ([CH₃COOH] [C₂H₅OH])

Set up an ICE table for each row and calculate the value of Kc.  Then average the results.  (See picture.)

Kc ≈ (3.919 + 4.012 + 3.902) / 3

Kc ≈ 3.94

Answer:

See explanation

Explanation:

The ability of a gas to function as a green house gas depends on its ability to absorb infra red rays. In turn, the absorption of infrared red rays depends on whether or not the molecule is IR active.

The triatomic molecules such as methane and water are IR active. Only IR active molecules can lead to green house effect.

Note that for a molecular vibrational mode to be IR active, the dipole moment of the molecule is changed as the vibration occurs .

Answer:

true

Explanation:

That would be true

(hope this helps ^^)

The temperature of the oxygen gas sample is 609 K, which is approximately 336°C or 637°F. The answer is A.

We can use the ideal gas law equation, PV = nRT, to solve for the temperature of the oxygen gas sample.

First, we need to calculate the number of moles of oxygen gas present in the sample using its mass and molar mass:

n = m/M

where:

n = number of moles

m = mass (in grams)

M = molar mass (in g/mol)

The molar mass of oxygen gas (O2) is 32.00 g/mol.

n = 48 g / 32.00 g/mol = 1.50 mol

Next, we can rearrange the ideal gas law equation to solve for temperature (T):

T = (PV) / (nR)

where:

T = temperature (in Kelvin)

P = pressure (in atm)

V = volume (in liters)

n = number of moles

R = gas constant (0.0821 L atm/mol K)

Plugging in the given values, we get:

T = (3.0 atm x 25 L) / (1.50 mol x 0.0821 L atm/mol K)

T = 609 K

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answer:

ionic bonds form between oppositely charged ions

explanation:

Answer:

Answer is D. All of the above

Answer:

Explanation:

The reaction that is described goes as follows:

2AgCl + Mg(OH)2 ---> MgCl2 + 2AgOH

The precipitate here is the MgCl2 salt.

I hope it helped!

The reaction between A and B is reactant favored. This  inference can be drawn from the graph.

Chemical reactions occur all around us, including in our body's digestion of food and the creation of the sunlight's light. Understanding both chemical and physical alterations is crucial before starting any chemical reactions. The best illustration of a chemical and physical alteration is a burning candle. The reaction between A and B is reactant favored. This  inference can be drawn from the graph.

Therefore, the correct option is option A.

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Answer:

step3:

aluminum- 11.98

copper-12.14

iron- 12.31

lead- 12.46

step5: 12.46, 52.31, 39.85

step7: 100, 22.4, 27.1, 4.7, 72.9

step5: 12.26, 52.49, 40.13

step7: 100, 22.7, 24.6, 1.9, 75.4

step5: 12.42, 52.66, 40.24

step7: 100, 22.5, 24.9, 2.4,75.1

step5: 12.34, 51.99, 39.65

step7: 100, 22.6, 23.3, 0.7, 76.7

step8: 0.90,0.35,0.44,0.12

Answer:

they are producers and they have means to keep themselves warm

Explanation:

I took test and saw answer.

Answer:

The meaning of subconsciously is of or concerning the part of the mind of which one is not fully aware but which influences one's actions and feelings.

Explanation:

sleeping is an example of subconsciously

The sample response is : how do mass and the type of material affect thermal energy transfer?

So one need to have include the below factors in your answer:

The mass of an object influences allure thermal strength transfer traits. Generally, objects accompanying best public have greater warm strength depository volume.

They can absorb more heat strength before experience a meaningful change in hotness. If an equal amount of heat is used to both objects, the object accompanying better mass will demand more heat strength to raise allure temperature distinguished to the object accompanying tinier mass .

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. In this experiment, you need to examine the idea of the thermal energy transfer. Using a controlled experiment, what might a good question about the variables that affect thermal energy transfer be? Thermal energy transfer depends on many properties, be limit your question to only two. What did you include in your question?

Answer:

See answer below

Explanation:

This is a Claisen condensation. In the picture below you have the mechanism and final product.

Hope this helps