what is the number of formula units in a 1.86 mol sample of fecl3?

Answer: A

Explanation:

5.0 g / 56 g/mol is the numerical expression that gives the number of moles in 5.0 g of CaO.

HOW TO FIND NUMBER OF MOLES:

CaO = 40g/mol + 16g/mol = 56g/mol

Number of moles = 5.0g ÷ 56g/mol

Therefore, 5.0 g / 56 g/mol is the numerical expression that gives the number of moles in 5.0 g of CaO.

Learn more: https://brainly.com/question/12513822?referrer=searchResults

Egg whites are simply made frothy by adding air during the whipping process. It's a physical shift as they are still eggs whites—a material that has not changed. Yet in a chemical transformation.

To put it another way, a chemical always consists of the same "substance." There are some substances in nature, like water. Other chemicals, including chlorine, are produced

All of these things are made of chemicals, some organic and others manmade, including air, water, iron, fuel, clothes, stones, equipment, plastics, plants, and food. Chemicals can be made up of several distinct chemicals or they might be specific chemical molecule like water. Nitrogen, carbon, water, carbon dioxide, and other substances are all present in air.

To know more about Chemical visit:

https://brainly.com/question/29447577

#SPJ4

Answer:

Sample response: Leaf-cutter ants gather pieces of leaves and store them in their nests to provide raw materials and food for the fungus that grows on the leaf pieces. The ants feed on the fungus, so by collecting leaves the ants are effectively able to grow their own food supply.

Explanation:

Answer:

Leaf-cutter ants gather pieces of leaves and store them in their nests to provide raw materials and food for the fungus that grows on the leaf pieces. The ants feed on the fungus, so by collecting leaves the ants are effectively able to grow their own food supply.

Explanation:

edg 2020

Answer:

A a metal such as copper

Explanation:

Answer:

A metal such as copper, because its atoms have very mobile electrons

Explanation:

Answer:

C.

Explanation:

Physicists main field of study is physics. This includes everything from force, matter, energy, and even time among other things. Therefore, from the questions provided the one that would most likely be studied by a physicist would be How can the forces on a space probe be controlled so it will land on Mars? This is because this question deals with forces acting on an object, regardless of what the object is Force is a huge part of physics and therefore studied by Physicists.

Answer:

A. Non-metal

B. Six

C. 2

D.NA2O

E.Oxygen

Explanation:

Oxygen is the element in the second period (second horizontal row) and Group VI A of the periodic table. These properties apply to oxygen

The majority of the energy is kept as NADH. The citric acid cycle also occurs in the matrix of mitochondria, where pyruvate is converted to acetyl CoA.

With the exception of succinate dehydrogenase, which is encased in the inner membrane of the mitochondrion, almost all of the enzymes involved in the citric acid cycle are soluble. The byproduct of glycolysis, pyruvate, is converted into acetyl CoA in the mitochondria for the following process. the citric acid cycle, wherein the mitochondrial modification of acetyl CoA results in the production of energy precursors. The cytoplasm is the location of glycolysis. The citric acid cycle takes place within the mitochondrion's mitochondrial matrix, and internal folded mitochondrial membranes are where oxidative metabolism takes place (cristae).

Learn more about glycolysis here-

https://brainly.com/question/15159050

#SPJ4

Answer:

Manganese is a chemical element with symbol Mn and atomic number 25.

Explanation:

Atoms of manganese in 1.00 g is 6.022×10²³

An atom is any particle of matter at its most basic level which contains at least one proton. Here are some examples of the atoms: hydrogen (H) and neon (Ne).

Atoms are made up of three particles known as subatomic particles: protons, neutrons and electrons.

To find the number of atoms  given mass multiplied by the Avogadro number

given mass = 1g

Avogadro no. = 6.022×10²³

number of atoms = 1 × 6.022×10²³ = 6.022×10²³

Thus, the number of manganese atoms is  6.022×10²³

To learn more about atoms, refer to below link:

https://brainly.com/question/20363027

#SPJ2

Answer:

10 g/ml

Explanation:

divide mass by volume means divide 1000 by 100 and your answer will be 10

The energy required to ionize a hydrogen atom in the n = 5 state is 0.544 eV.

To ionize a hydrogen atom in the n = 5 state, we need to completely remove its electron from the atom. This means that we need to supply enough energy to overcome the attraction between the electron and the nucleus. The energy required for ionization can be calculated using the Rydberg formula:
E = -RH/n^2
where E is the energy required for ionization, RH is the Rydberg constant (13.6 eV), and n is the principal quantum number of the electron (in this case, n = 5).
Plugging in the values, we get:
E = -13.6 eV / 5^2
E = -13.6 eV / 25
E = -0.544 eV

The Rydberg constant is a fundamental constant in physics that appears in the formula for the wavelengths of spectral lines emitted or absorbed by hydrogen atoms. It is named after the Swedish physicist Johannes Rydberg, who formulated the Rydberg formula.

The Rydberg constant is denoted by the symbol R∞, and its value depends on the units used. In SI units, the most commonly used value of the Rydberg constant is:

R∞ ≈ 1.0973731568508 x 10^7 m⁻¹
To know more about Rydberg formula, visit:

https://brainly.com/question/28168267

#SPJ11

Answer: Fluorine

Explanation:   There are many variables that can affect the strenght of attraction of the electrons in a chemical bond.

The most significant of them is the electronegativity: a meassure of the affinity an element has with the electrons . The higher the electronegativity, the stronger the attraction with electrons.

Brainliest pls Have a nice day

Answer:

the percent yield is 78.2%

Explanation:

The balanced equation for the reaction is:

2 Al₂(SO4)3 + 3 Mg → 3 MgSO4 + 4 Al

The molar mass of Al₂(SO4)3 is 342.15 g/mol.

First, calculate the number of moles of Al₂(SO4)3 present:

312.7 g / 342.15 g/mol = 0.913 mol Al₂(SO4)3

According to the balanced equation, 2 moles of Al₂(SO4)3 produce 4 moles of Al:

0.913 mol Al₂(SO4)3 x (4 mol Al / 2 mol Al₂(SO4)3) = 1.826 mol Al

The theoretical yield of Al is therefore:

1.826 mol Al x 26.98 g/mol = 49.24 g Al

The percent yield is:

(actual yield / theoretical yield) x 100%

Substituting the given values:

(38.5 g Al / 49.24 g Al) x 100% = 78.2%

Therefore, the percent yield is 78.2%.

Answer:

tantalum

i hope this helps<33 :)))))

Answer:

evaporation occurs when sunlight warms the surface of the water. The heat from the sun makes the water molecules move faster and faster, until they move so fast they escape as a gas

Answer:

Q = 5350.2 Joules.

Explanation:

Given the following data;

Mass, m = 26. 5g

Initial temperature, T1 = 0°C

Final temperature, T2 = 48.3°C

Specific heat capacity of water, c = 4.18 J/g°C.

*To find the quantity of heat*

Heat capacity is given by the formula;

\( Q = mcdt\)

Where;

dt = T2 - T1

dt = 48.3 - 0

dt = 48.3°C

Substituting the values into the equation, we have;

\( Q = 26.5*4.18*48.3\)

Q = 5350.2 Joules.

Therefore, the amount of heat absorbed is 5350.2 Joules.

Answer:

It a comet

Explanation:

that why they are also called dirty snowballs

Answer:

A comment

Explanation:

Because I took the test and that 100 and because comets are icy and sometimes lead tale of water droplets behind them

The triple bond between C1 and C2 is formed by the hybrid orbitals spsp s p s p.

What is the molecular shape VSEPR theory, often known as the valence-shell electron-pair repulsion theory?

The fundamental idea in molecular structures is known as valence shell electron pair repulsion (VSEPR). It basically says that electron pairs are attracted to one another and want to keep as far away as possible because they are made up of negatively charged particles.

What are the three fundamental assumptions of the VSEPR theory?

Since electron pairs are negatively charged, they will go as far apart as they can. Instead of bound electron pairs, lone pairs use up space. In comparison to single bonds, double bonds

To know more about vsper theory visit:

https://brainly.com/question/14992767

#SPJ4

Answer:

I will gain 1 electron

Ba will lose 2 electrons

Cs will lose 1 electron

Se will lose 2 electrons

Explanation:

This is because side reactions and unwanted byproducts are often favored at higher temperatures.

To avoid the formation of a side product in this experiment, the best approach would be to keep the reaction at a low temperature and avoid overheating the product during distillation. This is because side reactions and unwanted byproducts are often favored at higher temperatures. By maintaining a low temperature, the reaction can be controlled to favor the desired product and minimize the formation of side products.

Drying the aqueous layer, using pure sodium iodide, using pure silver nitrate, and venting the gases out of the separatory funnel are not specifically related to preventing the formation of side products in this context. They may be relevant for other aspects of the experiment, but they would not directly address the formation of side products.

Learn more about reactions here

https://brainly.com/question/16737295

#SPJ11

Answer: a)Complete ionic equation:

2NH₄⁺ + S²⁻ + Fe²⁺ + SO₄²⁻ → 2NH₄⁺ + SO₄²⁻ + FeS

Net ionic equation:

Fe²⁺ + S²⁻ → FeS

b) Complete ionic equation:

2Na⁺ + SO₃²⁻ + Ca²⁺ + 2Cl⁻ → 2Na⁺ + 2Cl⁻ + CaSO₃

Net ionic equation:

SO₃²⁻ + Ca²⁺ → CaSO₃

c) Complete ionic equation:

Cu²⁺ + SO₄²⁻ + Ba²⁺ + 2Cl⁻ → Cu²⁺ + 2Cl⁻ + BaSO₄

Net ionic equation:

Ba²⁺ + SO₄²⁻ → BaSO₄

Explanation:

(a) Balanced formula equation:

(NH₄)₂S + FeSO₄ → (NH₄)₂SO₄ + FeS

Complete ionic equation:

2NH₄⁺ + S²⁻ + Fe²⁺ + SO₄²⁻ → 2NH₄⁺ + SO₄²⁻ + FeS

Net ionic equation:

Fe²⁺ + S²⁻ → FeS

(b) Balanced formula equation:

Na₂SO₃ + CaCl₂ → NaCl + CaSO₃

Complete ionic equation:

2Na⁺ + SO₃²⁻ + Ca²⁺ + 2Cl⁻ → 2Na⁺ + 2Cl⁻ + CaSO₃

Net ionic equation:

SO₃²⁻ + Ca²⁺ → CaSO₃

(c) Balanced formula equation:

CuSO₄ + BaCl₂ → CuCl₂ + BaSO₄

Complete ionic equation:

Cu²⁺ + SO₄²⁻ + Ba²⁺ + 2Cl⁻ → Cu²⁺ + 2Cl⁻ + BaSO₄

Net ionic equation:

Ba²⁺ + SO₄²⁻ → BaSO₄

Answer:

CF₄

Explanation:

The molecular formula of the structure shown by the representation is given as:

     CF₄

The central atom is C and it is surrounded by 4 atoms of Fluorine.

Answer:

Answer : it's 8.8kg

Explanation:

that's what's it should be.

Among the given options, the solution that is 0.10 M HCN (a weak acid) and 0.10 M LiCN (its conjugate base) is a good buffer system since it consists of a weak acid and its conjugate base.

A buffer system is a solution that can resist changes in pH when small amounts of acidic or basic substances are added to it. It typically consists of a weak acid and its corresponding conjugate base, or a weak base and its corresponding conjugate acid, in roughly equal concentrations.

In the given options, the solution that contains 0.10 M HCN (a weak acid) and 0.10 M KCN (its corresponding conjugate base) is a good buffer system. This is because HCN can act as a weak acid, donating H+ ions, and KCN can act as its conjugate base, accepting H+ ions. The presence of both the weak acid and its conjugate base allows the buffer system to effectively resist changes in pH by neutralizing any added acidic or basic substances through the H+ and OH- ions produced by the weak acid and its conjugate base.

The other options do not contain a weak acid and its conjugate base in the correct proportions to form a buffer system. They either lack a weak acid or its conjugate base, or the concentrations are not in the appropriate ratio to form an effective buffer system.

To know more about Buffers:

https://brainly.com/question/15875589

#SPJ11

substances as a weak elctrolyte in water: H₂SO₃

Weak electrolytes are those that do not entirely dissociate or ionise in their aqueous solution. These electrolytes have low electrical conductivity and minimal ionisation extension. NH4OH, CH3COOH, etc. are a few examples. (Salts are occasionally referred to as ionic compounds, but particularly strong bases are also ionic compounds.) Weak acids and bases are among the weak electrolytes. Due to the partial dissociation of the solution in the fused or aqueous solution state, Na2CO3 is a weak electrolyte.A weak electrolyte is a solution where a negligible percentage of the dissolved solute is present as ions. A double arrow, signifying an equilibrium between the reactants and products, is used in the equation to depict the ionisation of a weak electrolyte.

Classify each of the following substances as a non electrolyte, weak electrolyte, or strong electrolyte in water:

1. H₂SO₃

2.NaSo4

3.KCl

4.NH4SO4

Learn more about weak electrolyte here:

https://brainly.com/question/29771118

#SPJ4

Answer:

#2.

Explanation:

Look at the charges. Both are positive, therefore both are cations.

Answer:

A. its reactivity

Explanation:

It's reactivity because copper was exposed to air and if it is reactivity it must be exposed to air

Answer:

A.  reactivity

Explanation:

Over time, the atomic size shrinks because as number of shells stays constant but more electrons are added, increasing the nuclear charge.

The distance between an atom's central nucleus and also its outermost shell is known just like its atomic size. The smallest distance here between atom's nucleus and its outermost shell is known as the atomic radius within basic chemistry.

The orbitals from higher primary energy levels have greater sizes than the orbitals form lower principal energy levels. Atomic radius grows down a group as a result of the stronger impact of the major energy levels outweighing a increase overall nuclear charge.

To know more about atomic radius visit:

https://brainly.com/question/29440273

#SPJ4

1) The speed of the particles would increase when heated

2) The balloon would expand when heated and contract when cooled.

3) On a hot day, the pressure of the gas in a beverage increases

4) The mercury thermometer works by expanding or contracting in response to temperature change.

We know that one of the effects of temperature is that it is able change the molecular motion of an object. Thus the molecules of an object are able to move faster when heat is applied and they are able to slow down when the heat is removed.

This is why a balloon would have a greater volume when the temperature is increased as the gas molecules spread out. The volume would reduce or decrease when the temperature is reduced.

Also, on a hot day, a beverage would tend to be more fuzzy as the pressure of the gas in the beverage would increase as the temperature is increased.

Lastly, when we use the mercury thermometer, the volume of the mercury would increase and this is the reason for the expansion of the mercury during temperature measurement.

Learn more about temperature:https://brainly.com/question/11464844

#SPJ1