4Fe +302 + 2Fe2O3
How many grams of Fe2O3 will be produced from 10.0 g of Fe and 7.00 g of O2?

Answer:

2.5 atm

Explanation:

To find the original pressure of the gas, you need to use the Combined Gas Law. The corresponding equation is:

\(\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}\)

In this equation, "P₁", "V₁", and "T₁" represent the original pressure, volume, and temperature. "P₂", "V₂", and "T₂" represent the new pressure, volume, and temperature.

Before you can plug the given values into the equation and solve for "P₁", you need to convert the temperatures from Celsius to Kelvin (°C + 273 = K).

The final answer should have 2 sig figs like the least accurate given value.

P₁ = ? atm                                          P₂ = 2.0 atm

V₁ = 28 L                                           V₂ = 34 L

T₁ = 45°C + 273 = 318 K                   T₂ = 35°C + 273 = 308 K

\(\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}\)                                            <----- Combined Gas Law

\(\frac{P_1(28L)}{318K}=\frac{(2.0 atm)(34L)}{308K}\)                            <----- Insert values

\(\frac{P_1(28L)}{318K}=0.2208\frac{atm*L}{K}\)                            <----- Simplify right side

\({P_1(28L)}=70.21atm*L\)                         <----- Multiply both sides by 318 K

\(P_1=2.5atm\)                                           <----- Divide both sides by 28 L

The number of moles of sodium chloride (NaCl) that can be produced is:

4.5 moles Na * (2 moles NaCl / 2 moles Na) = 4.5 moles NaCl from 4.5 moles of sodium (Na), you can produce 4.5 moles of sodium chloride (NaCl) according to the balanced chemical equation.

The balanced chemical equation shows that 2 moles of sodium (2Na) react with 1 mole of chlorine (Cl₂) to produce 2 moles of sodium chloride (2NaCl). From the given information, we have 4.5 moles of sodium (Na). According to the stoichiometry of the balanced equation, we can determine the number of moles of sodium chloride (NaCl) that can be produced by using a simple mole ratio. Mole ratio of Na to NaCl: 2 moles NaCl / 2 moles Na Therefore, the number of moles of sodium chloride (NaCl) that can be produced is: 4.5 moles Na * (2 moles NaCl / 2 moles Na) = 4.5 moles NaCl Hence, from 4.5 moles of sodium (Na), you can produce 4.5 moles of sodium chloride (NaCl) according to the balanced chemical equation.

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The first to dissolve is the solute in tank B. The amount of a substance that dissolves in a specific solvent concentration at a specific temperature is known as its solubility.

The introduction of a solute to a solvent is the first stage in the dissolving process. The molecules of these two substances begin to interact, causing the solute molecules to disperse and become encircled by solvent molecules.

In water, salt, sugar, and coffee all dissolve. They disintegrate quickly. They typically dissolve more rapidly and completely in hot or warm water. Even very hot water won't be able to dissolve sand or pepper.

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Answer:

It's A) magnesium bromide

Explanation:

The name for the compound MgBr2 is magnesium bromide. Mg is the symbol for magnesium, and Br is the symbol for bromine.

I Hope it will help

Answer:

Ok so I assume they gave u a reaction before asking this question. Look at that reaction and try to figure out what substances are changing in valency, if there is a substance(s) that doesn't change its valency then it's a spectator ion.

The process that does not occur as water changes phase from liquid to vapor is warming of the surrounding environment.

When water changes from liquid to vapor, it undergoes a phase change called evaporation. During this process, the water molecules absorb heat energy, which allows them to break free from the intermolecular forces that hold them together in the liquid state. This absorption of heat is what causes the temperature of the water to increase as it changes to vapor.

However, as the water molecules absorb heat, they actually cause the surrounding environment to become cooler, not warmer. This is because the heat energy is being transferred from the environment to the water molecules, causing the temperature of the environment to decrease. Therefore, warming of the surrounding environment does not occur during the phase change from liquid to vapor.

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1. Ensure Clear and Visible Placement: Machine controls should be located in a position that is easily accessible, visible, and within reach of the equipment operator. Clear and intuitive labeling or color-coding can also be used to enhance visibility and assist in identifying the controls quickly.

2. Provide Adequate Guarding: The machine controls should be positioned in a manner that minimizes the risk of accidental activation or unintended operation. This can be achieved by incorporating appropriate guarding or barriers around the controls to prevent inadvertent contact or interference.

3. Consider Ergonomics and Operator Comfort: When determining the location of machine controls, it is essential to consider ergonomic principles and operator comfort. Controls should be positioned in a way that allows operators to maintain a comfortable and natural posture while operating the equipment. This can help reduce the risk of operator fatigue, musculoskeletal disorders, and errors due to discomfort or awkward reach.

These rules aim to promote operator safety, minimize the potential for accidents, and ensure efficient and effective control of equipment involving fluid power components.

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Answer: I believe it would be B. Genus

Explanation:

I looked up the definitions for you and genus is defined as the group above species. Picture of definition attached.

The depreciation expense for 2019, using the straight-line method of depreciation, is $1,500.

The straight-line method of depreciation allocates the cost of an asset evenly over its useful life. To calculate the annual depreciation expense, we need to determine the depreciable cost of the asset, which is the cost of the asset minus its salvage value.

In this case, the cost of the asset is $40,000, and the salvage value is $10,000. Therefore, the depreciable cost is $40,000 - $10,000 = $30,000.

Next, we divide the depreciable cost by the useful life of the asset to find the annual depreciation expense. Since the estimated useful life is 5 years, the annual depreciation expense is $30,000 / 5 = $6,000.

However, we are specifically calculating the depreciation expense for the year 2019. Assuming the asset was placed into service on October 1, 2019, the portion of the year it was used is 3 months (October, November, and December). Thus, the depreciation expense for 2019 is $6,000 * (3/12) = $1,500.

Therefore, the correct answer is option a. $1,500.

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To raise the temperature of a 10.35g sample of carbon tetrachloride from 32.1°c to 56.4°c, 222.92J heat is required.

Heat is a form of energy and it is associated with the motion of particles. The amount of heat required to change the temperature of a substance depends on its mass, the specific heat capacity of the substance and the change in temperature.

The mass of carbon tetrachloride is given as 10.35g. The specific heat capacity of carbon tetrachloride is given as 0.85651 J/g°C and the change in temperature is given as 24.3°C. Putting these values into the formula: q = m × C × ΔTq = 10.35 g × 0.85651 J/g°C × 24.3°Cq = 222.92 J. Therefore, 222.92 Joules of heat are required to raise the temperature of a 10.35g sample of carbon tetrachloride from 32.1°c to 56.4°c.

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Answer:The answer is C. n i =3⟶n f =2

Explanation: I just take the test, I hope and helps, I know that is late.

Answer:

C. nᵢ = 3 ⟶ nᶠ = 2

Explanation:

Answer:

The total number of Joules lost to the surrounding is  -837.2 J

Explanation:

Given that:

mass = 10 grams

initial temperature =  80°C

Final temperature = 60 °C

Specific heat of water= c = 4.186 J/g. °C

The total number of Joules lost can be determined by finding the amount of heat energy Q released by using the formula:

Q = mC ΔT

Q = 10 × 4.186 × (60 - 80)° C

Q = 10 × 4.186 × - 20° C

Q = -837.2 J

Thus, the total number of Joules lost to the surrounding is  -837.2 J

The improved telescope showed scientists that the solar system contained comets.

The solar system has to do with the arrangement of the sun and the planets. The sun lies at the center of the solar system and then the sun is surrounded by the planets that move all around the sun in concentric circles.

Now we know that the telescope is the kind of object that could be used in the study of the outer space. We could use it to study the stars as well as other celestial bodies in the study of astronomy.

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Answer:

well because with the velocity of the two, using the second law, it can slow the velocity before there is a casualty.

Explanation:

Answer:

The Bohr model of the atom explains the reactivity of all atoms.

Answer:

prevent hydroxide formation

Explanation:

Answer:

idk but i tryed

Explanation:

The simplest way to use the periodic table to identify an element is by looking for the element’s name or elemental symbol. The periodic table can be used to identify an element by looking for the element’s atomic number. The atomic number of an element is the number of protons found within the atoms of that element.

The most indicative phenotype of a natural killer (NK) cell is CD16+. Option d.

This is because CD16, also known as FcγRIII, is a receptor found on the surface of NK cells that recognizes and binds to the Fc portion of IgG antibodies. This binding triggers the release of cytotoxic granules that can destroy virus-infected cells, tumor cells, and other abnormal cells.

CD2 and CD11b are also expressed on the surface of NK cells, but they are not specific to these cells and can also be found on other immune cells. CD3, on the other hand, is a marker for T cells, which are a different type of immune cell that function differently than NK cells. Therefore, the presence of CD16 on a cell is the strongest indicator of it being a natural killer cell. Answer option d.

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Answer:

B is incorrect

Explanation:

Ocean are made of salt water which is undrinkable therefore they are not any type of drinking water source.

Answer:

20.46 moles

Explanation:

1 mole of NH3 contains 17gm of NH3

so 347.89 gm of ammonia is in,

347.89/17 moles

=20.46 moles

NOTE. There should be ammonia instead of ammonium in question because ammonium is an ion not a compound.

The clay should be fired at a speed of 1.79 m/s (to two significant figures) in order to stop the car.

To solve this problem, we can use the conservation of momentum principle, which states that the total momentum of an isolated system remains constant. In this case, the initial momentum of the car and the final momentum of the car plus the clay must be equal in magnitude and opposite in direction.

Mass of the car (m1) = 1200 kg

Initial velocity of the car (v1) = 1.8 m/s

Mass of the clay (m2) = 10 kg

Final velocity of the car plus the clay (v2) = 0 m/s (since we want to stop the car)

Using the conservation of momentum principle, we can write:

m1v1 = (m1 + m2)v2

Solving for v2, we get:

v2 = (m1v1) / (m1 + m2)

Substituting the given values, we get:

v2 = (1200 kg x 1.8 m/s) / (1200 kg + 10 kg)

v2 = 1.79 m/s

Therefore, the clay should be fired at a speed of 1.79 m/s (to two significant figures) in order to stop the car.

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(complete question)

a 1200 kg car is rolling at 1.8 m/s. you would like to stop the car by firing a 10 kg blob of sticky clay at it. how fast should you fire the clay? express your answer to two significant figures and include the appropriate units.

Answer:  Yes

Explanation:

Liquefied Gases: Liquefied gases are gases which can become liquids at normal temperature when they are inside cylinders under pressure. ... Non-Liquefied Gases: also known as compressed, pressurized or permanent gases. These gases do not become liquid when they are compressed at normal temperatures even at high pressures.

The other gas which the article mentioned is Helium gas.

This refers to the squeezing or shortening of a substance which is most often done by  increasing the temperature.

The information scientists hope to gain by compressing this gas into a solid is by studying the molecular structures and using it in the production of other substances which is why Nitrogen and Helium are the gases being studied in this scenario.

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Answer:

hydrogen               and  gas giants

Explanation:

FROM PLATO

Answer:

D

Explanation:

The chemical reaction is most likely the slowest will be rocks are eroded by acid rain.

A chemical reaction occurs that involves the chemical change of one group of chemical compounds into another series of chemical substances.

Acid rain was the rain that has an overabundance of acids.

The chemical reaction is most likely the slowest will be rocks are eroded by acid rain.

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The key differentiating factor between a nonpolar covalent bond and a polar covalent bond is the unequal sharing of electrons.

i. Unequal sharing of electrons: In a nonpolar covalent bond, electrons are shared equally between the atoms. This occurs when the atoms have similar electronegativity, meaning they have similar abilities to attract electrons. As a result, there is no significant difference in the electron distribution, and the atoms do not acquire partial charges.

ii. Ions: Ions are charged particles that have gained or lost electrons. Unlike ionic bonds, which involve the complete transfer of electrons, covalent bonds involve the sharing of electrons between atoms. Therefore, the presence of ions does not differentiate between nonpolar and polar covalent bonds.

iii. Atoms of partial charge: In a polar covalent bond, there is an unequal sharing of electrons due to differences in electronegativity between the atoms. One atom has a stronger pull on the shared electrons, resulting in a partial negative charge (δ-) on that atom, while the other atom has a partial positive charge (δ+).

This imbalance in electron distribution creates atoms of partial charge.

Therefore, the key distinguishing characteristic between a nonpolar covalent bond and a polar covalent bond is the unequal sharing of electrons, leading to the development of partial charges on the atoms in a polar covalent bond.

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Answer:

answer in the picture hi shirllleeyyyyy

A substantial imbalance between demand and response capability under conditions in which failure has important consequences refers to STRESS. It may affect the functioning of a biological system.

Homeostasis refers to the state of internal (steady) equilibrium, which is required for the normal functioning of a biological system.

Conversely, stress can be defined as any environmental factor (e.g., excessive temperature condition) which is directly affecting the normal functioning of an organism.

Stress may lead to the loss of the homeostatic state when conditions cannot be supported by the organism.

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