Plz I need help on this Science question I don’t understand

Answer:

hey here is the answer to your question.

Explanation:

1) Write a balanced equation for the reaction occurring. (*Iron occurs in a few different oxidation states, but I will assume we're referring to Fe(II) or Fe2+)

Fe + CuSO4 -> Cu + FeSO4

2) Calculate the number of moles of each reactant.

Fe: 1.924 g * (1 mol / 55.85 g) = 0.03455 mol Fe

CuSO4: 0.1363 L * (0.0750 mol / 1 L) = 0.01022 mol CuSO4

3) Determine the limiting reactant. Because we have fewer moles of copper(II) sulfate and are reacting both reactants in a 1:1 ratio, we will run out of copper(II) sulfate first, making it the limiting reactant.

4) Convert moles of the limiting reactant to moles and grams of product of interest.

0.01022 CuSO4 (1 mol Cu / 1 mol CuSO4 ) (63.55 g Cu / 1 mol Cu) = 0.6495 g Cu

Answer:

Geologic carbon sequestration is the process of storing carbon dioxide (CO2) in underground geologic formations. The CO2 is usually pressurized until it becomes a liquid, and then it is injected into porous rock formations in geologic basins. This method of carbon storage is also sometimes a part of enhanced oil recovery, otherwise known as tertiary recovery, because it is typically used later in the life of a producing oil well. In enhanced oil recovery, the liquid CO2 is injected into the oil-bearing formation in order to reduce the viscosity of the oil and allow it to flow more easily to the oil well.

Biologic carbon sequestration refers to storage of atmospheric carbon in vegetation, soils, woody products, and aquatic environments. For example, by encouraging the growth of plants—particularly larger plants like trees—advocates of biologic sequestration hope to help remove CO2 from the atmosphere.

Hope this helped!

Answer:

Temperature is a common type of controlled variable. If a temperature is held constant during an experiment, it is controlled. Other examples of controlled variables could be an amount of light, using the same type of glassware, constant humidity, or duration of an experiment.

Explanation:

Answer:

Reaction will move rightwards.

Explanation:

Hello there!

In this case, according to the proposed question, it turns out possible for us to  figure out the effect of the addition of silver nitrate, by using the following representative equation for the formation of the silver chloride precipitate:

[tex]Ag^+(aq)+Cl^-(aq)\rightleftharpoons AgCl(s)[/tex]

Now, due to the addition of silver nitrate, we will be actually adding silver ions to the solution, which means that, in terms of the Le Ch atelier's principle, the reaction will shift to the right towards the formation of more silver chloride precipitate.

Best regards!

Answer:

6.3 atm

General Formulas and Concepts:

Atomic Structure

Ideal Gas Law

Ideal Gas Law Formula: PV = nRT

Explanation:

Step 1: Define

Identify variables

[Given] n = 3.2 mol O₂

[Given] V = 12.3 L

[Given] T = 294 K

[Solve] P

Step 2: Solve for P

Step 3: Check

Follow sig figs and round. We are given 2 sig figs as our lowest.

6.27965 atm ≈ 6.3 atm

Answer:

You will need 12.0 moles of F₂

Explanation:

Based on the chemical equation, 2 moles of AlF₃ are produced when 3 moles of F₂ are added in an excess of Al.

Using this expression: 2mol AlF₃ = 3mol F₂ we can find the moles of F₂ as follows:

8.00 mol AlF₃ * (3mol F₂ / 2mol AlF₃) =

Answer:

2Al + 3Cu(ClO3)2 → 2Al(ClO3)3 + 3Cu and

3Ag + Li3PO4 → Ag3PO4 + 3Li

Explanation:

In single repacement reactions, one element is substituted for another to produce a different compound. In the problem, the cation is exchange and the elements produced are:

Al(ClO3)3 and Ag3PO4.

The reactions are:

And:

Answer:

there's nothing in the picture or post

Answer:

There doesn't appear to be a question here.

Explanation:

you might need to reupload this with the question

Answer:

90g

Explanation:

I hope this helps plz give brainliest ! :D

Answer:

correct answer is d)

Explanation:

This answer demonstrates law of conservation of mass because the mass of the products is equal to the mass of reactants with the help of the coefficients which is the process known as balancing. This answer also includes the correct formulas, as Br is a gas so it MUST be written as Br2. hope this helps:)

2Al(s) + 3Br2(1) - 2AlBr3(s) is the  correct formulas and demonstrates conservation of mass.

Every action has an equal and opposite response, states Newton's Third Law. This indicates that any force applied to an item will have an equal and opposite-directed response force of the same magnitude. A force pair is the collective name for these connected forces.

Each individual object will have a different force pair with each other object in systems of numerous objects where all things interact. In the case of charged particles, the charge of each object will dictate the direction of each force in the force pair.

Similar charges will cause particles to repel one another by directing their forces away from one another. With their forces pointing in the same direction, particles with opposing charges attract one another.

Therefore, 2Al(s) + 3Br2(1) - 2AlBr3(s) is the  correct formulas and demonstrates conservation of mass.

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Answer:

I believe it's either a or b but I'm pretty sure that it's a

Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore, the electronic configuration of Nb²⁺ is [Kr]4d³.

Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.

The systematic distribution of electrons in the various atomic orbitals is called its electronic configuration. The atomic number of Nb is 41. The electronic configuration of Nb is [Kr] 4d⁴ 5s¹. The electronic configuration of Nb²⁺ is [Kr]4d³. Nb²⁺ also has an odd number of valence electrons. The superscripts represents the number of electrons in each orbitals.

Therefore, the electronic configuration of Nb²⁺ is [Kr]4d³.

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Answer:

Two Helium atoms

If two carbon atoms underwent fusion (of 600 million kelvin) you would get two helium atoms.

Answer:

Explanation:

The properties that are observed or measured without changing the composition of matter are called physical properties.

color, Temperature, Texture are the physical properties as the composition of matter remains the same.

On the other hand, Radioactivity, Flammability and Reactivity comes under chemical property as during the chemical reactions there might be some changes in the properties.

Answer:

B

Explanation:

B is the best showing of a chemical reaction out of the choices

Answer:

it is all except C

Explanation:

a chemical reaction occurs when 2 substances completely mix together and they do not remain separate

Given that the enthalpy change ΔH for the reaction is negative, energy is released during the reaction (Option D)

From the data given above, we can see that the enthalpy change (ΔH) for the reaction is negative.

This simple means that heat energy is lost to the environment.

Therefore, we can conclude that the during the reaction, energy is released (Option D)

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Answer:

The answer is C

Explanation:

I did it on edge

Answer:

False

Explanation:

Molecules are not more sizable atoms than the average atom. Molecules are compunds of two different symbolic elements, when you combine then you get a molecule. The answer to your question is false because if they were larger molecules, they would be in object around us but molecules are not in all objects around us.

Answer:

1,587.6

Explanation:

You use 92-32 =60

Then 60*29.4*0.9

You will get the answer

Answer:

The correct answer is C 112

Explanation:

I just took the test good luck :)

Answer:

I think it is 112

Answer:

D in addition to the original sample. In a file cabinet, she finds a paper labeled "Electrochemistry Activity" which lists five metals: zinc, aluminum, magnesium, silver and tin She is not able to find anything that identifies which metals correspond to which letters. She makes some quick observations, summarized below.

Explanation:

Answer:

The chemical bond formed by the transfer of electrons from the valence shell of one tom to the valence shell of another atom is called electrovalent bond or ionic bond ad the valency is electrovalency. The compounds which are formed as a result of lectrovalent bonding are called electrovalent compounds or ionic compounds.

Explanation:

ectrovalent bond is formed between two atoms in which one atom belongs to a etal while the other to a non-metal. The metal atom loses its valance electron to tain stable electronic configuration and gains positive ion or cation. On the other nd, the non-metal atom gains electrons from the metal to form stable negative ion anion. The atom of an element which has less than 4 electrons in its valence shell has tendency to lose electrons whereas the atom which has more than 4 electrons in its lance shell has a tendency to gain electrons to attain the inert gas configuration. As a sult, these atoms acquire electrical charges; called ions. Usually metal atoms lose ectron (s) and gain positively charged whereas non-metal atoms usually gains electron and acquires a negative charge. These two oppositely charge ions i.e. cation and mion are bonded together by the force of attraction to form the ionic bond.

Answer:

the chemical which transfer elements totally

Answer:

I think B but I'm not sure.

Answer: Amplitude of the light wave impacts brightness; the wavelength is what impacts/is associated with color.

Answer:

1. Al³⁺ + 3e⁻ → Al

Explanation:

In a reduction, the oxidation number of a species is converted to a lower value.

In the following half-reaction:

The number of atoms is the same on both sides of the equation (one Al atom). The electrical charge is also the same, as there is a total charge of 0 on both sides.

Answer:

Final temperature = 1279.25 K

Explanation:

We can solve this using the formula for Charles law since we are given volume and temperature.

From Charles law, we know that;

V1/T1 = V2/T2

Where;

T1 is the initial temperature

V1 is the initial volume

T2 is the final temperature

V2 is the final volume

We are given;

V1 = 2 L

T1 = 301 K

V2 = 8.5 L

Thus, making T2 the subject, we have;

T2 = V2•T1/V1

Plugging in the relevant values;

T2 = 8.5 × 301/2

T2 = 1279.25 K

Answer: a)neptunium b) the element is unstable

Explanation:

a) 238 0 239 -1

U + n = Np e

92 1 93 0

b) it is an isotope of neptunium with half-lives less than 4.5 days, with most less than 50 minutes. It is therefore not stable that's why they where unable to identify it

Answer:

Mechanical energy

Explanation:

Given that,

Potential energy of an object is given by :

P = mgh

The kinetic energy of an object is given by :

[tex]K=\dfrac{1}{2}mv^2[/tex]

Where

m is mass

h is height

v is velocity of the object

The sum of potential and kinetic energy is equal to total energy or the mechanical energy.

Hence, if air resistance is negligible, the sum total of potential and kinetic energies of a freely falling body is equal to mechanical energy.