Decide whether a chemical reaction happens in either of the following situations. If a reaction does happen, write the chemical equation for it. Be sure your chemical equation is balanced and has physical state symbols. chemical reaction? situation chemical equation A strip of solid palladium metal is put into a beaker of 0.045M Feso4 solution. yes no A strip of solid iron metal O yes is put into a beaker of 0.051M PdC2 solution. O no

Answer:

D.

Explanation:

Catalysts are substances that increase the rate of a reaction i.e. make it faster. Catalysts do this by reducing the activation energy needed for a reaction to occur.

According to the image in this question, a graph showing the energy of a reaction without a catalyst is displayed. This means that a longer time will be spent. However, with a catalyst, the activation energy will reduce as seen in the image in option D.

When NH₄OH and CaS are mixed the following reaction occurs:

NH₄OH + CaS ---> Ca(OH)₂ + (NH₄)₂S

Ca(OH)₂ is a poorly soluble base in water. So the formula of the precipitade formed is Ca(OH)₂ and its name is calcium hydroxide.

Bases with cations of the group II of the periodic table are generally poorly soluble in water.

Answer:

They all have the same number of molecules or atoms which is 3.011*10²⁴ molecules or atoms.

5 moles of O = 3.011*10²⁴ molecules or atoms

5 moles of N = 3.011*10²⁴ molecules or atoms

5 moles of MgCl2 = 3.011*10²⁴ molecules or atoms

5 moles of C2H3NO = 3.011*10²⁴ molecules or atoms.

Explanation:

a)

5 moles of O = ?

1 mole of any substance is equal to Avogadro's number which is equal to 6.022×10²³molecules or atoms

From the question above,

5 moles of O = 5 × 6.022*10²³ = 3.011×10²⁴atoms or molecules.

b)

5 moles of N

From the same principle or fundamentally stated fact above,

1 mole of any substance = 6.022*10²³molecules or atom

5 moles of N = 5 × 6.024

2*10²³ = 3.011*10²⁴atoms or molecules.

c)

5 moles of MgCl₂

Same principle we used in a and b,

1 mole of any substance = 6.022*10²³ atoms or molecules

5 moles of MgCl2 = 5.0×6.022*10²³ = 3.011*10²⁴ atoms or molecules.

d)

5 moles of C₂H₃NO = ?

1 mole of C₂H₃NO = 6.022*10²³molecules or atoms

5 moles = x molecules or atoms

x = 5 × 6.024

2*10²³ = 3.011*10²⁴ atoms or molecules

What this proves is that no matter the compound, molecule or element, as long as they have equal amount of moles, they'll have the same number of atoms, molecules or particles.

Answer:

a. 3.011x10²⁴ atoms of O in 5 moles.

b. 3.011x10²⁴ atoms of N in 5 moles.

c. 3.011x10²⁴ atoms of MgCl₂ in 5 moles.

d. 3.011x10²⁴ atoms of C₂H₃NO in 5 moles

Explanation:

A mole is defined as the number of atoms in exactly 12.000g of ¹²C.

This number is equal to 6.022x10²³. That means 1 mole is equal to 6.022x10²³.

Thus:

a. O . 5 moles of oxygen (An atom) are:

5 moles O ₓ (6.022x10²³ atoms of O / mole) = 3.011x10²⁴ atoms of O in 5 moles

b. N . Also, 5 moles of nitrogen are:

5 moles N ₓ (6.022x10²³ atoms of N / mole) = 3.011x10²⁴ atoms of N in 5 moles

c. MgCl₂ . Magnesium chloride is a molecule. Again, 1 mole of MgCl₂ contains 6.022x10²³ molecules and 5 moles are:

5 moles MgCl₂ ₓ (6.022x10²³ molecules of MgCl₂ / mole) = 3.011x10²⁴ atoms of MgCl₂ in 5 moles

d. C₂H₃NO. 5 moles of C₂H₃NO are:

5 moles  C₂H₃NO ₓ (6.022x10²³ molecules of  C₂H₃NO / mole) = 3.011x10²⁴ atoms of C₂H₃NO in 5 moles

As you can see, number of molecules of 1 mole doesn't depend on the nature of the substance.

If the mass of the magnesium oxide collected is 0.224 g then the 0.296g solid magnesium is E) Limiting reagent

Limiting reagent is a term used in chemistry to describe a reactant that is completely used up in a reaction in which it is involved and therefore this reagent determines when the reaction stops.

Magnesium burns brightly because the reaction releases a lot of heat. Because of this exothermic reaction, magnesium gives two electrons to oxygen, forming the product which is powdery magnesium oxide.

The reaction of magnesium with oxygen can be illustrated as follows;

\(2Mg + O_{2} ---- > 2MgO\)

As per the reaction, 2 moles of magnesium react with 1 mole of oxygen therefore magnesium produces less magnesium oxide as compared to oxygen and thus is the limiting reagent in this reaction.

Although a part of your question is incorrect, you might be referring to this question:

A 0.296 g piece of solid magnesium reacts with gaseous oxygen from the atmosphere to form solid magnesium oxide. In the laboratory, a student weighs the mass of the magnesium oxide collected from this reaction as 0.224 g The 0.296 g solid magnesium is the

Choose one:

O A actual yield

O B theoretical yield

O C excess reagent

O D. percent yield

O E limiting reagent

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Equilibrium is a state of balance or uniformity between opposing forces. In this case, the equilibrium is 2NO2(g) = N2O2(g). If the volume of the container increases, the answer to what will happen to the following equilibrium is "It will shift to the right.

Let's understand this in detail:

Le Chatelier's Principle is used to predict the effect of a change in the reaction conditions on the position of the equilibrium of a chemical reaction. This rule says that if stress or change is added to a system at equilibrium, it will adjust to relieve the stress or change.

The volume of the container in which the equilibrium is contained increases, meaning that the pressure decreases because there is now more space for the molecules to move around. The equilibrium position will shift to the side with more moles of gas, according to Le Chatelier's Principle.

In this instance, the equilibrium reaction contains two moles of NO2(g) and one N2O2(g) mole. This implies that the reaction produces more moles of gas than it consumes.

As a result, a rise in volume will cause the equilibrium to shift to the right to counterbalance the increased volume by increasing the number of gas molecules to fill the extra space.

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Chlorine contains a total of 17 electrons which are filled in different orbitals of which 7 electrons are located in the outermost energy level or orbital.

In an atom, the electrons are surrounding the nucleus through fixed paths or energy levels called orbitals.  Electrons are filled in the increasing order of energy level. Thus lower energy levels are filled first.

The last electrons are filled in the outermost energy levels and are called valence electrons.  Each shell have a definite capacity for electrons.

Cl is 17the element in periodic table and has 17 electrons of which 7 electrons are located in the outermost shell. Hence, option A is correct.

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TNT (Trinitrotoluene) has relatively small energy per pound, but it is a very effective explosive due to the following reasons:

1. It is an insensitive explosive: TNT has a high ignition temperature, making it less prone to accidental detonation. TNT can also resist shock and friction, making it a stable explosive.

2. High detonation velocity: TNT is capable of detonating at a speed of 6,900 m/s. This high velocity allows TNT to produce a supersonic shockwave that can cause significant damage to its surroundings.

3. High gas yield: When TNT explodes, it produces a large amount of gases, which further increases the pressure exerted on its surroundings. This high-pressure shockwave causes significant damage to buildings and structures.

4. Easy to manufacture: TNT is relatively easy and cheap to manufacture, making it a popular explosive for military and industrial applications.

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The number of milliliters of a 9.0 M H₂SO₄ solution needed to make 0.45 L of a 3.5 M solution is 157.5 milliliters.

To find the volume, in milliliters, of a 9.0 M H₂SO₄ solution needed to make 0.45 L of a 3.5 M solution, we can use the equation:

M1V1 = M2V2

Where:
M1 = initial concentration of the solution (9.0 M)
V1 = initial volume of the solution (unknown)
M2 = final concentration of the solution (3.5 M)
V2 = final volume of the solution (0.45 L)

Substituting the values into the equation, we have:

(9.0 M)(V1) = (3.5 M)(0.45 L)

Simplifying the equation:

V1 = (3.5 M)(0.45 L) / 9.0 M

V1 = 0.1575 L

To convert liters to milliliters, we multiply by 1000:

V1 = 0.1575 L * 1000 mL/L

V1 = 157.5 mL

Therefore, you would need 157.5 milliliters of a 9.0 M H₂SO₄ solution to make 0.45 L of a 3.5 M solution.

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To prepare a 0.45L solution of 3.5M H2SO4 from a 9.0M solution, 175 ml of the initial solution is needed.

To calculate the volume of the initial 9.0M H2SO4 solution required to dilute to a 0.45L solution of 3.5M concentration, we use the formula M1V1 = M2V2. Here, M1 is the initial molarity, V1 is the initial volume, M2 is the final molarity, and V2 is the final volume.

Plugging in our known values (M1 = 9.0 M, M2 = 3.5 M, and V2 = 0.45L), we solve for V1: 9.0 M * V1 = 3.5 M * 0.45 L.

Therefore, V1 = (3.5M * 0.45L) / 9.0M = 0.175 L or 175 milliliters of the 9.0 M H2SO4 solution are needed to prepare a 0.45 L solution of 3.5 M H2SO4.

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Atomic spectrum is the type of spectrum which is produced when electromagnetic radiation is emitted or absorbed as electrons change energy levels in atom.

This is a term which is referred to as a subatomic particle which has a negative charge and is involved in chemical reactions.

In a scenario where an electromagnetic radiation is emitted or absorbed as electrons change energy levels in atom, atomic spectrum is produced and has also been shined through or originates from a material in which it either emits or absorbs light of a specific wavelength thereby making it the correct choice.

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Answer:

Argon

Explanation:

Because, it is positioned down on the periodic table

Answer:

Argon

Explanation:

a. The chemical equation for the neutralization reaction between perchloric acid, HClO₄, and barium hydroxide, Ba(OH)₂, is:
HClO₄ + 2Ba(OH)₂ → Ba(ClO₄)₂ + 2H₂O

b. The salt produced in this reaction is called barium perchlorate, Ba(ClO₄)₂.

a. To write the chemical equation for the neutralization reaction between perchloric acid (HClO₄) and barium hydroxide (Ba(OH)₂), we need to remember that in such reactions, an acid reacts with a base to produce water and a salt. The balanced chemical equation for this reaction is:

2 HClO₄ (aq) + Ba(OH)₂ (aq) → 2 H₂O (l) + Ba(ClO₄)₂ (aq)

b. The name of the salt produced in this reaction is barium perchlorate, with the chemical formula Ba(ClO₄)₂.

So, the neutralization reaction between perchloric acid (HClO₄) and barium hydroxide (Ba(OH)₂) can be represented by the balanced chemical equation 2 HClO₄ (aq) + Ba(OH)₂ (aq) → 2 H₂O (l) + Ba(ClO₄)₂ (aq), and the salt produced in this reaction is barium perchlorate (Ba(ClO₄)₂).

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Answer:

48.23 liters.

Explanation:

To calculate the volume of a gas, we can use the ideal gas law equation:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the universal gas constant, and T is the absolute temperature.

First, we need to convert the temperature to Kelvin by adding 273.15:

T = 61.6°C + 273.15 = 334.75 K

Next, we can substitute the given values into the equation and solve for V:

V = (nRT) / P

V = (1.95 mol * 0.08206 L atm mol^-1 K^-1 * 334.75 K) / (844 mmHg * 1 atm / 760 mmHg)

V ≈ 48.23 L

Therefore, the volume of the gas is approximately 48.23 liters.

The molar mass of gas is 6.48 g/mol

Graham's law of diffusion states that the rate of diffusion of a gas is inversely proportional to the density of the gas.

The molar mass of Hydrogen gas = 2

R2/R1 = 1.8

Molar mass of gas = 2 × 1.8 × 1.8

Molar mass of gas = 6.48 g/mol

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Answer:

\(\frac{7}{3}\)

Explanation:

Using two points to find the slope

The formula:

\(\frac{y_ {2} - y__1}{x_2-x_1}\)

The points:

\((0,-5)\)

\((6,9)\)

Plug the points in the formula; solve:

\(\frac{9-(-5)}{6-0}\)

\(=\frac{14}{6}\)

\(=\frac{14\div2}{6\div2}\)

\(=\frac{7}{3}\)

\(\bold{m=\frac{7}{3}}\)

Therefore, the slope is \(\frac{7}{3}\).

The Slope of this line is 3/7. Hence option B is correct.

The slope is ratio of the rise to the run. You can determine the slope of a line from its graph by looking at the rise and run. One characteristic of a line is that its slope is constant all the way along.

The equation of the straight line is given by,

y = mx + c

here m is the slop of the line and c is the intercept, when line goes from the origin the intercept of the line is zero.

The line is straight in the space.

the slope of x-y coordinates is given by,

m = (y₂ - y₁) ÷ (x₂ - x₁)

In this given figure we have,

y₂ = 9

y₁ = -5

x₂ = 6

x₁ = 0

m = ?

m = (y₂ - y₁) ÷ (x₂ - x₁) = (9--5)/6 = 14/6 =7/3

Hence option D is correct.

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The muscles of the stomach crush food that has entered the stomach cavity is a physical change. The correct option is D. a physical change.

Digestion is the breakdown of food material in the stomach, which produce energy.

Digestion includes a chemical and physical process. The food is digested by the chemicals present in the stomach.

Thus, the correct option is D. a physical change, only.

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Answer:

H2SO4 + 2NaNO2 → HNO2 + Na2SO4

The balanced equation for the breakdown of sulfuric acid and sodium nitrate is:

H2SO4 + 2NaNO2 -> HNO2 + Na2SO4

This equation shows that for every one molecule of sulfuric acid (H2SO4), two molecules of sodium nitrate (NaNO2) are required to produce one molecule of nitrous acid (HNO2) and one molecule of sodium sulfate (Na2SO4).

In terms of mass, the equation shows that for every 588 grams of sulfuric acid, 828 grams of sodium nitrate are required to produce 564 grams of nitrous acid and 384 grams of sodium sulfate.

The stroke volume in the next few cardiac cycles will be 100 ml if the end-diastolic volume is increased from 135ml to 165m.

The formula for stroke volume is given as;

SV = EDV - ESV

Here SV represents stroke volume, EDV represents end-diastolic volume and ESV represents end-systolic volume.

First, we calculate this person's end-systolic volume as follows;

If the person’s stroke volume was 70ml and his initial diastolic volume was 135 ml, then:

70 = 135 - ESV

70 - 135 = -ESV

-65 = -ESV

ESV = 65ml

Now the stroke volume in the next few cycles if the end-diastolic volume increase to 165 ml can be calculated as follows;

SV = 165 - 65

SV = 100ml

Therefore, the stroke volume in the next few cardiac cycles is calculated to be 100ml.

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Answer:

Enthalpy is a property of a thermodynamic system, defined as the sum of the system's internal energy and the product of its pressure and volume, H = U + pV

Explanation:

The answer is option

The reaction:

is a Synthesis reaction, because from 2 different substances it is produced

We do not have enough information to deduce the isotope that would have nine neutrons. Option 5

The atom is composed of subatomic particles. The subatomic particles that are in the atom are such that we have the electrons that are negatively charged, the protons that are positively charged and the neutrons that are uncharged.

Now, we know that the number of neutrons is obtained as the difference between the mass number and the atomic number of the atom. In this case, we only have the mass numbers and not the atomic numbers thus we do not have sufficient information.

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The electrolytes will have higher conductivity when the electrolytes  dissolves through the water

When an electrolyte dissolves in water, an electric current will flow through the solution. Electrolytes conduct electricity by dissociating the electrolyte solution into ions.

Other elements or compounds in water that provide free ions, such as sodium chloride. Pure  water can conduct electricity depending on pressure and volume (also known as voltage and current), but it is a relatively weak conductor.

Most water contains trace elements that contribute to ions and allow electrical conductivity. The more ions, the higher the conductivity. In the broadest sense, an element or compound that dissolves in water and can add ions to the solution causes a higher electrical conductivity.

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Stronger Lewis bases can displace weaker Lewis bases as ligands within a complex due to their higher reactivity and ability to form stronger coordination bonds. Stronger Lewis bases are typically characterized by having lone pair electrons on atoms with a net charge and/or a lower electronegativity.

In coordination chemistry, Lewis bases act as ligands by donating electron pairs to form coordinate bonds with metal ions. The strength of a Lewis base determines its ability to displace weaker ligands within a complex. Stronger Lewis bases have a greater tendency to form stronger coordination bonds with the central metal ion, leading to the displacement of weaker ligands.

A Lewis base's strength is influenced by various factors. Atoms with lone pair electrons on atoms with a net charge, such as anions or atoms in negatively charged functional groups, tend to be stronger Lewis bases. The presence of a net charge enhances the availability of the lone pair electrons, facilitating their donation to the metal ion.

Additionally, atoms with a lower electronegativity tend to be better Lewis bases. Lower electronegativity indicates that the atom holds its electrons more loosely, making them more readily available for donation. The weaker the attraction between the electrons and the nucleus, the more easily the atom can act as a Lewis base.

Charged species, including both anions and cations, are generally less stable and more reactive compared to uncharged species. The formation of a bond between a Lewis base and a metal ion results in a more stable, lower energy state, contributing to the higher reactivity of charged species.Overall, the ability of stronger Lewis bases to displace weaker ligands is attributed to their higher reactivity, stronger coordination bond formation, and the availability of lone pair electrons facilitated by factors such as net charge and lower electronegativity.

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The given statement is true. In order for an electron to go back to the ground state, the atom emits the excess energy in the form of a photon.

After absorbing the energy, the electron advances to a higher energy state. In the opposite process, called emission, the electron releases the excess energy it had taken up and goes back to its ground state.

The energy of the electron drops when it changes levels, and the atom releases photons. The emission of the photon occurs as the electron transitions from a higher to a lower energy state. The energy of the photon is precisely the energy that is lost when an electron moves to a level with less energy.

Because each element has a different amount of electrons and hence a diverse range of energy levels, each element's spectra are distinct.

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Answer:

41 inches

Explanation:

There is 12 inches in 1 foot so times 12 and 3. Thats 36 so now do 36 + 5 that =41.

Ethyl alcohol is the waste product that yeast produce under anaerobic conditions.

Yeast cells are versatile and play a key role in producing numerous important products.

Yeast cells generate carbon dioxide, ethyl alcohol, and energy during fermentation.

When oxygen is not available, anaerobic respiration, or fermentation, is used by yeast cells to convert sugar into energy.

When sugar is broken down through fermentation, carbon dioxide and ethanol (ethyl alcohol) are the two most abundant byproducts produced by yeast cells.

The CO2 is the same gas that is responsible for producing bread's signature light texture, while the alcohol is utilized to create drinks like beer, wine, and other fermented beverages.

Yeast cells are critical in the production of these items, which are widely consumed across the world.

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In anaerobic conditions, yeast produces ethyl alcohol (or ethanol) and carbon dioxide as waste products.

Under anaerobic conditions, yeast perform a type of respiration known as fermentation. In this process, yeast convert sugars into different forms of energy, producing a characteristic waste product, which in this case, is ethyl alcohol (or ethanol) and carbon dioxide. This is different from aerobic respiration (in the presence of oxygen), where the waste products would be water and carbon dioxide.

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A total of 10 electrons are needed to fill a complete set of d orbitals, with each of the five d orbitals holding a maximum of two electrons.

The dxy, dxz, dyz, dz2, and dx2-y2 orbitals are the five orbitals that make up a full set of d orbitals. The greatest number of electrons that can fit into each of these orbitals is two, therefore a full set of d orbitals needs 10 electrons to fill it.

According to Hund's rule, electrons fill empty orbitals with parallel spins at the same energy level before partnering up, this is how the d orbitals are filled. This filling order impacts the element's chemical characteristics and the electron configuration of the element.

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1) The intermolecular forces   for \(Br_{2}\) is Dispersion forces

2) The intermolecular forces   for  HCl - Hydrogen bonding

3) The intermolecular forces   for \(H_{2} O\)- Hydrogen bonding

4) The intermolecular forces   for He - Dispersion forces

5) The intermolecular forces   for \(CH_{3} Cl\) -  Dipole-dipole

The term  intermolecular forces has to do with the forces that holds the molecules of a substance together. These are the kind of forces that determine the physical properties of the substance that is under consideration.

We know that the helium molecules and the bromine molecules are both held together by the dispersion forces alone. All the other substances have a mixture of other kinds of forces in them.

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Answer:

mendellevs periodic table states that the properties of elements are the periodic function of their relative atomic masses. mendeleev arranged all 63 elements which were discoverd till his time; in the order of their increasing relative atomic masses in a tabular form. it is known as mendellev periodic table.

Explanation:

hope it helps!!