Determine the molecular formula of a compound that has a molar mass of 92. 0 g/mol and an empirical formula of no2.

To predict the regions where you can expect IR absorption for each bond, we need to consider the functional groups present and their respective vibrational frequencies.

Here are some common functional groups and their approximate IR absorption ranges:

These ranges will help you predict the regions where IR absorption is expected for various types of bonds. Make sure to analyze the molecule's structure and identify the functional groups present to determine the expected IR absorptions.

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Answer:

2 mole of water is greater than 2 mole of carbon dioxide which is greater than 2 mole of ozone

Explanation:

water has 36g

carbon dioxide has 44g

ozone 48g

Answer:

volcanic eruption.

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Answer:

d. 12.3 grams of Al2O3

Explanation:

The balanced chemical equation of this chemical reaction is as follows:

4Al + 3O2 --> 2Al2O3

Based on the balanced equation, 4 moles of aluminum (limiting reagent) reacts to form 2 moles of aluminum oxide (Al2O3).

First, we need to convert the mass of aluminum to moles using the formula;

mole = mass/molar mass

Molar mass of Al = 27g/mol

mole = 6.50/27

= 0.241mol of Al.

Hence, if 4 moles of aluminum (limiting reagent) reacts to form 2 moles of aluminum oxide (Al2O3).

Then, 0.241mol of Al will produce (0.241 × 2/4) = 0.241/2 = 0.121mol of Al2O3.

Convert this mole value to molar mass using mole = mass/molar mass

Molar mass of Al2O3 = 27(2) + 16(3)

= 54 + 48

= 102g/mol

mass = molar mass × mole

mass = 102 × 0.121

mass of Al2O3 = 12.34grams.

Answer:

490.83 oK

Explanation:

First of all, we better agree on the meaning of the word adiabatically. It means without the loss or gain of heat. So nothing is given up to or taken from the environment.

This also assumes that no change has occurred in the pressure.

T1 = 310 oK

T2 = ?

V1 = 12 L

V2 = 19 L

T1/V1 = T2/V2

310 / 12 = x/19            Multiply both sides by 19

310*19 / 12 = T2         Multiply 310 * 19 on the left.

5890 / 12   = T2         Divide by 12

490.83 = T2

Answer:

✔️Metalliod, Mass: 73

Explanation:

The unknown element that is represented in the Periodic table is Germanium (Ge). It is in Group 14(IVA) and Period 4 of the periodic table. It is a metalloid and a silvery-gray substance. It's properties are intermediate between metals and nonmetals. It has a mass of 73 and an atomic number of 32.

To prove that oxygen is produced during photosynthesis, the following steps must be performed:

Place aquatic plants in a beaker of pond water.

Cover plants with short-stem funnels.

Invert the test tube filled with water to cover the stem of the funnel. Make sure the water level in the beaker is above the height of the funnel when inserting the

test tube.

Expose the device to sunlight.

After several hours, air bubbles form and collect in the test tube.

test the gas in the test tube.

Glowing debris bursts into flames, indicating the presence of oxygen.

Observation: Gas bubbles are seen in the test tube.

Result: Oxygen is produced

Conclusion: Gas bubbles are formed which prove that oxygen is produced by the green plants during photosynthesis

What is photosynthesis ?

Photosynthesis is the process that plants and other organisms use to convert light energy into chemical energy, which is later released through cellular respiration to power the activity of the organism. Some of this chemical energy is stored in carbohydrate molecules such as sugars and starches synthesized from carbon dioxide and water. Hence, photosynthesis is named 'light' and synthesis is named 'assemble'. Most plants, algae, and cyanobacteria perform photosynthesis. Such organisms are called photoautotrophs. Photosynthesis is largely responsible for the production and maintenance of the oxygen content of the Earth's atmosphere and provides most of the energy needed for life on Earth.

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Answer:

14.2 L H2S

Explanation:

Mole ratio

2 mol H2S:2 mol SO2

We are just looking for volume, so the required amount is the same as the produced amount as long as the mole ratio is balanced.

The balanced equation is: 2H2S + 3O2 → 2SO2 + 2H2O. Mole ratio 2 mol H2S:2 mol SO2.

Two factors can be used to identify stoichiometry problems:  the information provided in the problem and  he information that needs to be solved for, also known as the unknown.

The given and the unknown might both be reactants, could both be products, or could both be products with one of them acting as a reactant. Mole amounts can be used to express the substance quantities.

However, it is typical in a laboratory setting to calculate a substance's mass in grams to determine how much of it is present. A gaseous substance's volume can be used to express its quantity.

Therefore, The balanced equation is: 2H2S + 3O2 → 2SO2 + 2H2O. Mole ratio 2 mol H2S:2 mol SO2.

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False, Asbestos is a naturally occurring mineral fiber that was commonly used in various industries due to its heat resistance, strength, and insulating properties.

Asbestos does not necessarily need to be removed if it will not be disturbed or pose a risk to human health. Asbestos-containing materials that are in good condition and undisturbed are generally considered safe. However, if asbestos-containing materials are damaged, deteriorating, or will be disturbed during renovation or demolition activities, it is necessary to take appropriate precautions, which may include professional removal or encapsulation, to prevent the release of asbestos fibers into the air. The decision to remove asbestos should be based on an assessment of its condition, potential for disturbance, and adherence to local regulations and guidelines.

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Answer: D) none of the above

Explanation:

The student might be inconsistent in using different balances when weighing the small product. Using a well-calibrated microbalance and the same one every time can help in attaining accurate measurements of small masses.

The student's difficulty in accurately weighing a small amount of product could be due to option a) They are utilizing a different balance each time. This could introduce errors due to inconsistencies in the calibration and accuracy of different balances. However, it is not accurate that it is impossible to weigh very small amounts (option b) or that only a special scale that only the TA can use is needed (option c). Small masses can be weighed accurately with a well-calibrated microbalance. These instruments are designed to accurately measure small weights and are often found in laboratory settings. It is also crucial to use the same balance each time to ensure consistent results.

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The gas from a 20L helium gas tank can fill approximately 200 balloons.

To determine the number of balloons that can be filled with the gas from a 20L helium gas tank, we need to calculate the volume of helium gas in the tank and then divide it by the capacity of each balloon.

Given:

Volume of helium gas tank = 20 L

Capacity of each balloon = 100 cm³

First, we need to convert the volume of the helium gas tank to cubic centimeters (cm³) since the capacity of the balloon is given in cm³.

20 L = 20,000 cm³

Now, we can divide the volume of the helium gas tank by the capacity of each balloon:

Number of balloons = (Volume of helium gas tank) / (Capacity of each balloon)

Number of balloons = 20,000 cm³ / 100 cm³ = 200

Therefore, the gas from a 20L helium gas tank can fill approximately 200 balloons.

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Answer:

Explanation:

Food moves through the digestive system with a wave-like motion called peristalsis. Muscles in the walls of the hollow organs contract and relax to cause this movement, which pushes food through the esophagus into the stomach.Apr 25, 2018

Answer:

C

Explanation:

As the size of a star increases, luminosity increases. If you think about it, a larger star has more surface area. That increased surface area allows more light and energy to be given off.

Answer:

D or C.

Explanation:

Sorry if its wrong

Answer:

A. Rocks along the coast are broken up by waves crashing into the shore.

Explanation:

Answer:

This organelle has two major functions: it stores the cell's hereditary material, or DNA, and it coordinates the cell's activities, which include growth, intermediary metabolism, protein synthesis, and reproduction (cell division).

It is necessary to divide a crime laboratory to different units and areas because of avoiding cross-contamination, workflow management and quality control.

Dividing a crime laboratory into different units and areas is necessary for several reasons:

1. Specialization: Different areas of forensic science require specialized knowledge and expertise. Dividing the laboratory allows for dedicated units that focus on specific forensic disciplines, such as DNA analysis, fingerprint examination, ballistics, toxicology, and document analysis. Specialization ensures that experts can develop and maintain a high level of proficiency in their respective fields, leading to accurate and reliable results.

2. Avoiding cross-contamination: Crime scenes can contain multiple types of evidence, ranging from biological samples to trace evidence. Dividing the laboratory into separate units helps prevent cross-contamination between different types of evidence. For example, DNA analysis requires strict protocols to prevent contamination, and having a dedicated DNA unit minimizes the risk of cross-contaminating DNA samples with other types of evidence.

3. Workflow management: Dividing the laboratory into units based on different forensic disciplines allows for efficient workflow management. Each unit can handle specific types of cases and allocate resources accordingly. This division ensures that cases are processed in a timely manner, prevents bottlenecks, and allows for effective coordination between units.

4. Quality control: Having separate units within a crime laboratory facilitates internal quality control measures. Each unit can establish its own quality control procedures and protocols specific to their area of expertise. This helps maintain high standards of accuracy and reliability in the analysis of evidence.

A specific situation that could lead to the assumption of dividing a crime laboratory is the increasing complexity and volume of cases. As forensic science continues to advance and new techniques emerge, the workload and demand for specialized analysis also increase. For example, the rise of digital forensics and the need to analyze electronic devices for evidence in cybercrime cases have created a need for dedicated digital forensic units within crime laboratories. Dividing the laboratory in such a scenario allows for specialized training, equipment, and expertise to handle these complex cases effectively.

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Answer:carbon dioxide gas

Explanation:you can tell when gas if forming when you can see the formation of bubbles

Answer:

i cants bye

Explanation:

byeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

The volume (in litres at 298 K and 6.09 atm) of chlorine gas, Cl₂, that is required to react with 7.44 g of P is 2.41 L

To determine the volume of the chlorine gas that will react with 7.44 g of P, we shall begin by obtaining the mole of the chlorine gas, Cl₂ that reacted. This can be obtained as follow:

2P + 5Cl₂ → 2PCl₅

From the balanced equation above,

2 moles of P reacted with 5 moles of Cl₂

Therefore,

0.24 moles of P will react with = (0.24 × 5) / 2 = 0.6 mole of Cl₂

Haven obtain the mole of chlorine gas, Cl₂, we shall determine the volume of the chlorine gas, Cl₂, required by using the ideal gas equation. This is shown below

PV = nRT

6.09 × V = 0.6 × 0.0821 × 299

Divide both sides by 6.09

V = (0.6 × 0.0821 × 299) / 6.09

V = 2.41 L

Thus, the volume of chlorine gas required is 2.41 L

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The combination of diffuse nature, cumulative effect, difficulty in regulation, and weather-dependent variations makes non-point source pollution have a greater impact on waterways compared to point source pollution.

Non-point source pollution has a greater impact on waterways compared to point source water pollution due to several reasons:

Diffuse nature: Non-point source pollution refers to pollution that does not come from a single identifiable source but rather originates from multiple dispersed activities and sources. These activities include agricultural runoff, urban stormwater runoff, construction sites, and atmospheric deposition. Because non-point source pollution comes from various locations, it is more challenging to control and manage compared to point source pollution, which typically originates from a specific and identifiable source such as a discharge pipe from an industrial facility.

Cumulative effect: Non-point source pollution has a cumulative effect on waterways. The pollutants, such as sediment, nutrients, pesticides, and chemicals, are carried by rainwater or runoff into rivers, lakes, and other water bodies. The combined impact of multiple non-point sources can result in a significant pollution load, leading to water quality degradation and ecosystem damage over a wide area. The continuous and cumulative nature of non-point source pollution makes it more pervasive and challenging to mitigate.

Difficult to trace and regulate: Point source pollution, being from a specific source, is relatively easier to identify, monitor, and regulate. Regulatory agencies can establish permits, set discharge limits, and enforce compliance with pollution control measures for point source discharges. On the other hand, non-point source pollution is often difficult to trace back to specific sources or activities. This makes it more challenging to establish regulations and enforce control measures effectively.

Seasonal and weather-dependent variations: Non-point source pollution is often influenced by weather conditions and seasonal variations. Heavy rainfall events can cause runoff carrying pollutants from various sources, including agricultural fields, urban areas, and construction sites. The intensity and frequency of these events can increase the transport of pollutants into waterways, leading to episodic spikes in pollution levels. This variability makes it more challenging to predict and manage non-point source pollution effectively.

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NaOH is known to be adeliquescent substance, so it has to be standardized using KHP before used for analysis.

A primary standard is a substance whose standard solution can be prepared using the solid. Such a substance must be pure and non-deliquescent.

Since NaOH is a deliquescent substance, it must therefore always be standardized using KHP before used for analysis.

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Plants are grown in soil that contains low grade ore. the plants absorb metal ions through their roots and concentrate these ions in their cells. the plants are harvested and burnt. the ash left behind contains metal compounds.

I hope this helps :)

Answer:

Al and Hcl

Explanation:

Reactants are the elements, compounds etc before the arrow

A furnace has an advantage over a flame in atomic absorption because it is more sensitive due to the lengthier time the atomized material remains in the optical path.

Absorption in chemistry is the process by which a material that is already present in one state gets assimilated into another substance that is already present in another state (e.g., gases being absorbed by a liquid or liquids being absorbed by a solid).

Absorption and adsorption have quite different definitions. A liquid can be absorbed by a substance like a sponge, cloth, or filter paper. The absorbent substance absorbs all of the liquid. Adsorption describes the accumulation of single molecules, atoms, or ions on surfaces.

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Answer:

Yellowing of leaves

Explanation:

Involves the colour change in leaves whereby less amount of chlorophyll is produced

Answer:

burning, cooking, milk becoming curd, rusting of iron

4500+3000=

7500grados