Which change will produce a new substance?
Heating water until freezes
Cooling water until freezes
Burning a piece of wood
Dissolving sugar in water

The elements 56 L and 53 M correspond to Barium (Ba) and Iodine (I), respectively. The compound formed from these elements is Barium Iodide, which has the chemical formula BaI2.

Barium Iodide (BaI2) is a white crystalline solid that is soluble in water. It is an ionic compound formed from the combination of barium cations (Ba^2+) and iodide anions (I^-). Barium Iodide is commonly used in various applications, including the production of high-purity iodine, as a scintillation crystal for detecting ionizing radiation, and as a source of iodine in animal feed.

BaI2 is a strong electrolyte and dissociates completely into ions when dissolved in water, making it a good conductor of electricity. It has a high thermal stability and is relatively unreactive to other chemical species. However, it can react with strong acids to release hydrogen iodide gas, which is a toxic and highly reactive substance.

In addition, Barium Iodide is considered toxic if ingested and can cause adverse effects such as abdominal pain, diarrhea, and vomiting. Handling of the compound should be done with care, following proper safety procedures and wearing protective equipment such as gloves and goggles.

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The mass of hydrogen needed to produce 51.0 grams of ammonia is  ≈ 9.07 grams.

To determine the mass of hydrogen required to produce 51.0 grams of ammonia (NH3) using the Haber process, we need to calculate the stoichiometric ratio between hydrogen and ammonia.

From the balanced chemical equation:

3 H₂(g) + N₂(g) → 2 NH₃(g)

We can see that for every 3 moles of hydrogen (H₂), we obtain 2 moles of ammonia (NH₃).

First, we need to convert the given mass of ammonia (51.0 grams) to moles. The molar mass of NH₃ is 17.03 g/mol.

Number of moles of NH₃ = Mass / Molar mass

                     = 51.0 g / 17.03 g/mol

                     ≈ 2.995 moles

Next, using the stoichiometric ratio, we can calculate the moles of hydrogen required.

Moles of H₂ = (Moles of NH₃ × Coefficient of H₂) / Coefficient of NH₃

           = (2.995 moles × 3) / 2

           ≈ 4.493 moles

Finally, we can convert the moles of hydrogen to mass using the molar mass of hydrogen (2.02 g/mol).

Mass of H₂ = Moles × Molar mass

          = 4.493 moles × 2.02 g/mol

          ≈ 9.07 grams

Therefore, approximately 9.07 grams of hydrogen is needed to produce 51.0 grams of ammonia in the Haber process.

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Answer:

the correct answer is c

Explanation:

becuase i had the same question

Answer:

Collecting data

Explanation:

Scientific inquiry can be explained as methods undertook by scientists to profer solutions, explanations, predict natural occurence and to some extent solve some of the problems of the earth through scientific study and processes. Evidence of solutions is made available to be built upon by also other scientists in the near future.

process of scientific inquiry include, in no particular order:

Note, that the explanation below doesn't follow any order.

1. Formulating questions: This is the problem that needed to be solved. Scientific inquiries usually begin with a question that can be proven scientifically.

2. Observation: taking neccessary information for the experiment.  Collecting data (answer to the question) falls under this process as information collected are used to carry out the experiment.

3. Hypothesis: Based on the observation and test carried out, scientists provide answers to the experiment, however methods used remain open for further experiments by other scientists. This is done so the results are tested and proven before they can be generally accepted as a rule or law.

4. Experiment: the experiment is carried out here.

5. Data analysis: Here the data collected are analysed using scientific methods.

6. Results: This stage shows the other aforementioned stages took place. Results of the scientific research/experiment are published.

Answer:collecting data

Explanation:i did it on study island

The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

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Answer:

0.430 Litre

Explanation:

The first thing that you need to do here is to convert the mass of lithium bromide to moles by using the compound's molar mass.\(100g \frac{1 moleNaCl}{58.5g} = 1.71 moles of NaCl\)

Now, the molarity of the solution is simply a measure of the number of moles of solute, which in your case is NaCl, present for every 1.00 L of the solution.

In order to have a 4.00-M solution of NaCl, you need to have 4.00 moles of NaCl for every 1.00 L of this solution.

You know that your sample contains 1.71 moles of NaCl, so you can use the molarity of the solution as a conversion factor to determine how many liters of this solution can be made.

\(1.71 mole NaCl \frac{ 1 L Solution}{4 mole NaCl} = 0.43 L solution\).

Answer: Sí

Explanation: ya que una mascota es inofensiva, pero para fotografiar a un animal salvaje, debes esperar pacientemente el momento perfecto

If organisms cannot adapt to the changes in their ecosystem, they may move to another location. If they will not move, the species may become threatened, endangered or extinct.

Answer:

They usually die and go extinct like how polar bears are. There are of course exceptions.

Explanation:

Polarity is the distribution of electrical charge among the atoms connected by a chemical bond.

1. CH2CL- Carbon has an electronegativity of 2.5, hydrogen has a 2.2 electronegativity, and the chlorine atom has a 3.1 electronegativity. Their electronegativities differ by 0.3 for C-H and 0.6 for C-Cl. The fact that dichloromethane is a polar molecule is therefore confirmed.

2. CH3OH- The C-O bond has a difference in electronegativity of 3.44 - 2.55 = 0.89, which cannot be disregarded. The C-O bond is hence polar. The O-H bond is polar because the difference in electronegativity is 3.44 - 2.2 = 1.24.

3. OF2 - Two O-F covalent bonds can be found in OF2 O F 2. Oxygen has an electronegativity of 3.5. Fluorine has an electronegativity of 4.0. Therefore, there is a 0.5 discrepancy between the electronegativity values. Thus OF2 is polar.

4. CCl4 - Carbon tetrachloride (CCl4) is a non-polar molecule with µ=0

5. BF3 - It is more than 0.5 because the difference between the electronegativity values of B and F is equivalent to 1.94 (3.98 - 2.04 = 1.94). Therefore, each B-F bond in the molecule of boron trifluoride (BF3) is polar.

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Answer:

because it is

If the MDS (Minimum Data Set) is successfully implemented, several positive outcomes can be expected. The MDS is a standardized assessment tool used in healthcare settings to evaluate the physical, mental, and psychosocial well-being of patients.

Its successful implementation can lead to improved patient care, more efficient resource allocation, and enhanced data analysis.With the MDS in place, healthcare providers can gather consistent and comprehensive data about patients, enabling better understanding of their needs and tailoring of individualized care plans.

This can result in improved treatment outcomes and patient satisfaction. Additionally, the MDS facilitates effective communication and information sharing among healthcare professionals, leading to coordinated care and reduced errors.From a broader perspective, successful implementation of the MDS allows for accurate and reliable data collection, enabling robust research and evidence-based decision-making.

This can contribute to advancements in healthcare practices, policy development, and quality improvement initiatives. Ultimately, the successful implementation of the MDS can enhance patient outcomes, improve healthcare delivery, and drive positive changes in the healthcare system as a whole.

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Answer:

H₂SO₄  

Explanation:

A Brønsted acid is a proton donor.  It loses protons.

This equation may be easier to understand if we write it ionically.

\(\underbrace{\hbox{H$_{2}$SO$_{4}$}}_{\hbox{Br$\o{}$nsted acid}} + 2 \text{NH}_{3} \longrightarrow \, \underbrace{\hbox{SO$_{4}^{2-}$}}_{\hbox{Br$\o{}$nsted base}} + \text{2 NH}_{4}^{+}\)

We see that the H₂SO₄ has lost two protons to become SO₄²⁻, so it is a Brønsted acid.

Answer:

The answer is D if it's wrong let me know pls

Answer:

A: computers, is the answer I believe

Answer:UIHIU

A small amount of chemical splashes in Frank’s eye. What should Frank do immediately?

Explanation:A small amount of chemical splashes in Frank’s eye. What should Frank do immediately?

The answer responses to  the structures shown in the diagram are:

A. chromosomes

C. They would be the same.

B. They are in pairs because each one comes from a different parent.

The chromosomes are in pairs because humans have a diploid number of chromosomes, meaning they have two sets of chromosomes, one inherited from each parent.

The nucleus is important in eukaryotic cells and has many important parts that help the cell work properly. There are some parts inside cells called the nuclear membrane, nucleoplasm, nucleolus, and chromatin. Chromatin is made up of DNA and other proteins.

Every part of a person's body has the same genes, but the way they are organized can be different in different types of cells. The chromosomes in our skin cells might not be the same as the chromosomes in our muscle cells, even if they come from the same person.

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Identify the structures shown.

A. chromosomes

B. mitochondria

C. nuclei

D. vacuoles

C

Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.

A. There would be longer.

B. They would be shorter.

C. They would be the same.

D. They would be different.

Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.

A. There would be longer.

B. They would be shorter.

C. They would be the same.

D. They would be different.

Explain why the structures are in pairs.

A. They aren't in pairs.

B. They are in pairs because each one comes from a different parent.

C. This cell is making a copy of itself.

D. The cell always has 2 copies in case 1 is damaged.

Answer: Refract

Explanation:

Two key criteria that engineers must prioritize are efficiency and safety. By emphasizing efficiency and safety during process development, engineers can create robust and reliable processes that not only maximize productivity but also prioritize the well-being of personnel and the environment.

When developing a process, engineers need to consider several important criteria. Two key criteria that engineers must prioritize are efficiency and safety.

Efficiency is crucial in process development to ensure optimal use of resources, time, and energy. Engineers strive to design processes that maximize productivity, minimize waste, and reduce costs. This involves optimizing reaction conditions, streamlining workflow, and implementing automation where possible. Efficiency considerations also extend to energy consumption, raw material utilization, and overall process sustainability.

Safety is another critical aspect that engineers must prioritize. They need to identify and mitigate potential hazards associated with the process, ensuring the safety of both personnel and the environment. This involves conducting thorough risk assessments, implementing safety protocols, and designing equipment and systems with safety features. Engineers must also consider the safe handling and storage of materials, as well as potential risks during transportation and disposal.

By emphasizing efficiency and safety during process development, engineers can create robust and reliable processes that not only maximize productivity but also prioritize the well-being of personnel and the environment.

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0.26L is the volume of sodium hydroxide, NaOH, needed for the reaction to occur.

A measurement of three-dimensional space is volume. Several imperial or US customary units, as well as SI-derived units (such the cubic meter and liter), are frequently used to quantify it quantitatively (such as the gallon, quart, cubic inch).

Volume and length (cubed) have a symbiotic relationship. The capacity of such a container is typically regarded to be its volume.

Molarity₁×Volume₁=Molarity₂×Volume₂

0.95 × 0.42=1.5×Volume₂

Volume₂=(0.95 × 0.42)/1.5

             =0.26L

Therefore, 0.26L is the volume of sodium hydroxide, NaOH, needed for the reaction to occur.

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From the given choice of substances, the one that is not a molecule is Mn.

Molecules are defined as the smallest unit of a substance that can exist and still retain the properties of that substance.

Molecules of substance are usually formed from the atom of the substances when two or more atoms of the same elements or different elements combine.

Molecules of substances are capable of existing alone but atoms of an element must combine to form molecules.

Considering the given substance to determine whether they are molecules or not:

H₂S is a molecule because it contains more than one atom of elements.

O₃ is a molecule because it contains more than one atom of elements.

KOH is a molecule because it contains more than one atom of elements.

Mn is a not molecule because it contains only one atom of elements.

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Answer:

A) (i) 4*10^12 Ibs , (ii) 600 * 10^9 Ibs  

(iii)

B) The use of  bricks or stone that can absorb the solar heat easily when the sun rays heat them up and this solar heat absorbed . is a typical example of a passive solar heating system.

C) Advantage : It is mostly cost free

disadvantage : there is no storage mechanism

Explanation:

A) Given that U.S uses roughly 4 million Gigawatt-hours per year in electricity and 50% of the electricity comes from coal

i) Determine how much carbon dioxide is released from burning coal each year

since 50% of electricity comes from coal

The Total energy produced by coal =2*10^12 Kw-h. also

1.0 kilowatt-hour of coal burned releases 2 lbs.

hence the Total amount of Carbon dioxide released from burning coal each year = 2 * 2 * 10^12 =  4 * 10^12 Ibs  

ii) Determine the reduction of carbon dioxide entering the atmosphere each year if coal usage could be reduced by 15% by utilizing solar energy

= 15% 0f 4*10^12

reduction of coal usage by 15% = 600 * 10^9 Ibs hence the amount of coal entering the atmosphere is reduced by 600 * 10^9 Ibs

iii) Advantages of using wind energy to generate electricity

B) Passive solar heating system

The use of  bricks or stone that can absorb the solar heat easily when the sun rays heat them up and this solar heat absorbed . is a typical example of a passive solar heating system.

C) advantage and disadvantage of solar heating system

Advantage : It is mostly cost free

disadvantage : there is no storage mechanism

Answer:

One atom of sulfur has a mass of 32.07 AMU; one mole of S atoms has a mass of 32.07 g.

Explanation:

Therefore, the answer should be 32.07 g

Answer:

Explanation:

Observation. Observational skills are the starting point for critical thinking. People who are observant can quickly sense and identify a new problem.

Analysis. Once a problem has been identified, analysis skills become essential. ...

Answer:

These three are correct:

The kinetic energy of a substance is proportional to temperature.

The potential energy of a substance depends on its composition.

Chemical systems contain both kinetic energy and potential energy.

Explanation:

Answer:

7.5 kcal

Explanation:

1.0 cal /g-C   * 100 g * (100- 25 C) = 7500 cal = 7.5 kcal

The amount of heat energy necessary to raise the temperature of 100 g of water at room temperature (25°C) to the boiling point (100°C) is 7.5 kcal.

Given to us the mass of water, the specific heat of water, and the change in temperature, we need to calculate the amount of heat energy.

m = 100 g

c = 1.0 cal/g°C

ΔT = (100 °C - 25 °C) = 75 °C

To calculate the amount of heat energy required, we can use the formula:

Q = m × c× ΔT

Where:

Q = heat energy (in calories)

m = mass of water (in grams)

c = specific heat of water (in cal/g°C)

ΔT = change in temperature (in °C)

Substituting the values into the formula:

Q = 100 g × 1.0 cal/g°C × 75 °C

Q = 7500 cal

7500 cal = 7.5 kcal

Therefore, the amount of heat energy required to raise the temperature of 100 g of water from 25 °C to 100 °C is 7500 calories, which is equivalent to 7.5 kcal.

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Answer:

1.67

Explanation:

Mass÷mr=moles

3÷18=1.67

To titrate 30.00 ml of a 0.1000 M \(NaOH\) solution, one needs about 0.6126 g of monoprotic \(KHP\).

1. To calculate the amount of \(NaOH\) needed to make a 0.1 M solution, we first need to calculate the number of moles of \(NaOH\) needed.

Molarity = moles of solute / liters of solution
0.1 M = x moles / 0.5 L
x = 0.05 moles

Now we can calculate the mass of \(NaOH\) needed:
Mass = moles x molecular weight

Mass = 0.05 moles x 40.3 g/mol
Mass = 2.015 g

Therefore, approximately 2.015 g of \(NaOH\) should be dissolved in 500 ml of distilled water to produce a solution with a molarity near 0.1 M.

2. We can use the equation:
Moles of \(NaOH\) = moles of \(KHP\)

Molarity x volume (in liters) of \(NaOH\) = moles of \(KHP\)
0.1000 M x 0.03000 L = moles of \(KHP\)

moles of \(KHP\) = 0.003
Now we can calculate the mass of \(KHP\) needed:

Mass = moles x molecular weight
Mass = 0.003 moles x 204.2 g/mol

Mass = 0.6126 g
Therefore, approximately 0.6126 g of monoprotic \(KHP\) is needed to titrate 30.00 ml of a 0.1000 M \(NaOH\) solution.

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