I need help on this please

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

Peanut butter is a homogenous mixture, because it is made up of many ingredients Therefore, option C is correct.

A mixture is called as homogenous if its constitution is constant throughout. Because the dissolved salt is uniformly spread across the whole salt water sample, the salt water depicted above is homogenous.

Most commonly, homogenous refers to having the same pieces or components throughout. A homogenous mixture has a consistent feature or attribute throughout.

The term "homogenous" can also refer to a group of items that are fundamentally the same or of the same sort.

It is homogenous because it consists of many components adding sugar, salt, vegetable oil, and roasted peanuts.

Thus, option C is correct.

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The risk assessment team, consisting of various members from different departments within the winery, conducted a comprehensive assessment of the potential risks associated with sulfur dioxide (SO2) and dimethyl dicarbonate (DMDC) operations.

Data was collected regarding the equipment, chemicals, procedures, training, incident history, and physical attributes of the workplace. The team also interviewed employees to gather their experiences, concerns, and suggestions.

After reviewing the collected information, the team identified the potential risks of fatalities or serious incidents related to workplace exposures of SO2 and DMDC. These risks were considered of utmost priority and required immediate control to ensure an acceptable level of safety. The consultant highlighted the importance of addressing these serious risks, as fatality and serious incident rates have not shown a decline and demand serious attention.

Factors contributing to the potential for environmental releases, explosions, and disasters were identified, including unusual and nonroutine work, nonproduction tasks, facility modification or construction activities, shutdowns and startups for repair and maintenance tasks, exposure to high-energy sources (such as electrical, steam, pneumatic, chemical), and situations transitioning from normal to abnormal (upsets).

Based on the assessment and the identified risks, it is crucial for the winery to implement effective control measures to minimize the potential for fatalities, serious incidents, and environmental disasters. These measures may include improving procedures, enhancing operator training, implementing stricter safety protocols, and ensuring proper handling and storage of chemicals.

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Answer:

If an orderly set of steps is followed, the observations and results are more reliable. The experiment can be conducted again using the sample procedure.

Explanation:

Hope it helps :)

Answer:

Magnesium has valency equal to 2 +

Explanation:

because the electronic configuration of Mg is [2,8,2]. The nearest noble gas to magnesium is neon with electronic configuration of [2,8], to achieve this stable electronic configuration Mg can lose 2 valence electrons, hence its valency is 2 + .

The molar mass of the compound (i.e silver oxide) Ag₂O obtained from the periodic table is 232 g/mol

The molar mass a compound is simply defined as the sum of the molar masses of the individual elements found in the compound.

Molar mass of Ag₂O = (2×108) + 16

Molar mass of Ag₂O = 216 + 16

Molar mass of Ag₂O = 232 g/mol

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Answer: 231.753 g/mol

Explanation:

got it right on Exact Path

Answer:

I not sure if this is right but maybe b since its particles is more spread out?

Answer:

Jelani Jones

Explanation:

But I thought it was 2 not three

Answer:

1. yes because it wants to go back to its original spot.

2. the poetical energy turns into kenotic energy and then moves back to the original position

3. it will go back to the original position just different angle

4. same thing as last time goes back to the original position but different angle because of how you are holding the ruler.

Explanation:

Answer:

C

Explanation:

I took this class it's C they are balanced

Answer:

The main function of sensory transduction is the conversion of sensory signals to chemical signals in the nervous system. Sensory transduction occurs in the sensory receptors. In sensory transduction, the sensory neurons play an important role.

Explanation:

The element with lowest electronegativity, based on periodic trends, is Li. An atom's electronegativity is measured.

Atomic radius, ionisation energy, electron attraction, electronegativity, valency, and metallic nature are important periodic trends. Due to the periodic nature of the elements and their similar electrical configurations within their various groups or periods, these tendencies are present.

The number of protons on the nucleus, the number of energetic levels, & the shielding effect are three variables that aid in the prediction of trends in the periodic table. In any group, the atomic radii get larger from top to bottom.

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Answer: B.

Explanation:

Trust me already took the quiz on it its B.

Answer:

Yes its B

Explanation:

Explanation:

Newtons third law states for every action (force) in nature there is an equal and opposite reaction

Answer:

\(2H_2O\rightarrow 2H_2+O_2\)

Explanation:

Hello there!

In this case, for the reaction by which water is decomposed to molecular hydrogen and oxygen:

\(H_2O\rightarrow H_2+O_2\)

It is necessary to perform the inspection balance process since there is a dissimilar number of atoms of oxygen on both sides; therefore, by putting a 2 on water we balance oxygen:

\(2H_2O\rightarrow H_2+O_2\)

But now, there are four hydrogens on the left; therefore, we put a 2 on hydrogen to finally balance it:

\(2H_2O\rightarrow 2H_2+O_2\)

And obviously, the coefficient in oxygen is an unwritten 1.

Best regards!

The approximate normal boiling point of 2-chloroheptane can be determined using a vapor pressure nomograph. Given that the boiling point of 2-chloroheptane is 46 °C at 19 mmHg, we can use the nomograph to estimate the boiling point at normal atmospheric pressure.

1. The vapor pressure nomograph is a graphical representation that relates the boiling point and vapor pressure of a substance at different pressures. To estimate the normal boiling point, we need to determine the vapor pressure at standard atmospheric pressure (760 mmHg) using the given data.

2. On the vapor pressure nomograph, locate the point representing 19 mmHg on the y-axis and draw a horizontal line to intersect with the diagonal line representing the normal boiling point. From this intersection, draw a vertical line down to the x-axis to determine the temperature corresponding to 19 mmHg.

3. By estimating the intersection point, we find that the temperature is approximately 46 °C at 19 mmHg. Since the normal boiling point is defined as the boiling point at atmospheric pressure (760 mmHg), we can approximate the normal boiling point of 2-chloroheptane to be around 46 °C.

4. It's important to note that the accuracy of this approximation depends on the precision and reliability of the vapor pressure nomograph used.

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If the total mass of the mixture is 115.5 g, 36.38g of cacl2 and 79.12g of water were used.

The problem requires calculating the mass of water and calcium chloride in a mixture of calcium chloride and water.

The mixture's total mass is 115.5 g, with calcium chloride accounting for 31.5% of the mixture. Let x be the mass of calcium chloride in grams in the mixture of calcium chloride and water. So, the mass of water in grams will be (115.5-x).

The mass fraction of the calcium chloride in the mixture is 0.315, as given in the question. Thus, we can write:

mass of calcium chloride / total mass of mixture = 0.315

where the mass of calcium chloride is x grams and the total mass of mixture is 115.5 grams.

Rearranging the equation gives:

mass of calcium chloride = 0.315 × total mass of mixture

mass of calcium chloride = 0.315 × 115.5

mass of calcium chloride = 36.38 g

Since the total mass of the mixture is 115.5 g, the mass of water will be:

mass of water = total mass - mass of calcium chloride

mass of water = 115.5 - 36.38

mass of water = 79.12 g

Therefore, 36.38 g of calcium chloride and 79.12 g of water were used to make a 115.5 g mixture.

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Answer:

The two factors that determine whether a reaction is spontaneous are:

Enthalpy: When the reaction gives off energy, then the reaction is said to be spontaneous.

Entropy: It is the measure of randomness in a system. As the randomness of the reaction increases, the spontaneous is the reaction.

That's it

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The pH of the 0.741 M LiOH solution at 25°C is approximately 13.87.

To determine the pH of a 0.741 M LiOH solution at 25°C, we need to calculate the concentration of hydroxide ions (OH-) in the solution and then use that value to find the pOH. Finally, we can calculate the pH using the equation pH = 14 - pOH.

LiOH is a strong base that dissociates completely in water, so the concentration of hydroxide ions is equal to the concentration of LiOH. In this case, the concentration is given as 0.741 M.

Next, we can calculate the pOH using the equation pOH = -log[OH-]. Since the concentration of hydroxide ions is 0.741 M, the pOH is -log(0.741) = 0.13.

Finally, we can calculate the pH using the equation pH = 14 - pOH. Substituting the value of pOH, we get pH = 14 - 0.13 = 13.87.

Therefore, the pH of the 0.741 M LiOH solution at 25°C is approximately 13.87.

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(a) Carbon monoxide (CO) emissions from internal combustion engines increase in colder climates. Thus, the environmental damage from CO emissions is worse in the winter months than in the summer months.

Nonetheless, air quality control authorities use a standard for CO that is uniform throughout the year with no allowance for seasonal effects. Suppose you are in charge of setting a policy for CO emissions. The marginal damages cost (MD) in the winter is 3E and in the summer is 2E. The MAC of CO emissions in both winter and summer is 60-E. To ensure an allocatively efficient outcome across the two seasons, the marginal damage cost (MD) and the marginal abatement cost (MAC) should be equal. At the point where MD=MAC, social welfare will be maximized. Therefore, equating marginal damage cost (MD) and marginal abatement cost (MAC) in both winter and summer gives: 3E = 60 - E2E = 60 - EE = 20. Thus, the government should set a uniform CO emission standard for winter and summer seasons at 20 to ensure an allocatively efficient outcome across the two seasons.

(b) If the government sets a policy that says emission level for winter and summer will be equiproportion, i.e., E = 15, determine the change in net benefit or welfare loss associated with this policy. MD of CO emission in winter = 3E = 3(15) = 45MD of CO emission in summer = 2E = 2(15) = 30 MAC of CO emission in both winter and summer = 60 - E = 60 - 15 = 45. For a policy that says emission level for winter and summer will be equiproportion, the level of CO emission will be E = 15. The corresponding net benefit can be found as: NB = MB - MC = (MD - MAC) * E = (45 - 45) * 15 = 0. Therefore, the net benefit or welfare loss associated with this policy is zero.

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Answer:

diagram C best represents the mixture

Answer:

28.82 mL

Explanation:

This is about gases laws, in this case about  Charles Gay Lussac.

At constant pressure the volume is proportional to the T°.

V₁ / T₁ =  V₂ /T₂

42.1 mL / 371K = V₂ /254K

(42.1 mL / 371K) . 254K

V₂ = 28.82 mL

In conclussion:

As T° was decreased, the volume also decreased too.

Answer:

0.333 M

Explanation:

Divide the mass of NaOH by the molar mass and then divide by the volume.

80.0 g / 40.0 g/mol = 2.00 mol NaOH

2.00 mol NaOH / 6.00 L = 0.333 M NaOH

Answer:

See Explanation

Explanation:

It is a common observation that a strip of aluminium metal in aqueous copper(II)Sulfate does not show any visible reaction. Aluminium is normally expected to displace copper in solution since it is higher than copper in the electrochemical series.

The reason for this is that aluminium forms an oxide film around its surface which prevents reaction with aqueous copper(II)Sulfate. This oxides film protects the aluminium surface such that it is now unable to react with the aqueous copper(II)Sulfate

When the cyclist goes downhill, their energy increases and their potential energy decreases At the same time, they move down faster and their energy increases. The matchup of the images is given in the image attached.

If PE is lowest, this means the cyclist is at the lowest point, like at the bottom of a hill or in a valley. Right now, the cyclist has the lowest amount of potential energy due to gravity because they are the closest to the ground.

Therefore, when a cyclist goes uphill, their energy decreases but their potential energy increases.

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Therefore, the normal force on the wheels at A and B is 760.28 N.

To find the acceleration of the trailer, we need to use Newton's second law, which states that the net force acting on an object is equal to its mass times its acceleration. In this case, the net force acting on the trailer is the horizontal force of 600 N, and the mass of the trailer is 155 kg. So, we can calculate the acceleration as follows:
Net force = 600 N
Mass = 155 kg
Acceleration = Net force / Mass
Acceleration = 600 N / 155 kg
Acceleration = 3.87 m/s^2
Therefore, the acceleration of the trailer is 3.87 m/s^2.
To find the normal force on the wheels at A and B, we need to consider the forces acting on the trailer. Since the wheels are free to roll, the only force acting on them is the normal force from the ground. The normal force is perpendicular to the ground and is equal in magnitude to the weight of the trailer and its load.
The weight of the trailer and its load can be calculated as follows:
Weight = Mass x gravitational acceleration
Weight = 155 kg x 9.81 m/s^2
Weight = 1520.55 N
Since the weight is evenly distributed between the two wheels, the normal force on each wheel is half of the weight, which is:
Normal force = Weight / 2
Normal force = 1520.55 N / 2
Normal force = 760.28 N

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Answer:

1) Elements consist of small particles  called atoms

2) All atoms of the same element are identical and different elements have      different types of atom.

3) Atoms can neither be created nor destroyed.

4) chemical compounds are formed when atoms of different elements join in simple ratios to form ‘compound atoms’

Answer:

D

Explanation:

It would be D because it would increse yes in population because the panthers are decreasing and attacking less. But, it would still level off because there are other predators who can kill the white tailed deer. Also the panther who is endangered could still atack even though theres just a few left that does not affect them from attacking. So it would increase but it would still level off.

FeS+O2=Fe2O3+SO2

Iron (II) sulfide + Oxygen gas

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