Gummy Bear Osmosis Experiment: do you know why the gummy bear expanded the most with sparkling water as opposed to plain water?

Answer:

oxygen obey the octet rule when reacting to form compounds by adding 2 electrons.

Explanation:

Answer:

See below.

Explanation:

An oxygen atom, in free state has 8 electrons, 2 in the first shell, and 6 in the second. It can only achieve stability if the valency of the valence shell is 0. In order for this, it combines with another atom with the same valency, such as magnesium or another oxygen atom to obey the octet rule. Hope it helps.

Answer:

Boiling, melting

Explanation:

Physical changes affect the form of a chemical substance.

The complete catabolism of a reduced organic energy source to CO2, using glycolytic pathways and the TCA cycle, with oxygen as the terminal electron acceptor for electron transport, is called aerobic respiration.

Aerobic respiration is the process by which living organisms convert organic compounds such as glucose into carbon dioxide, water, and energy in the form of ATP. The process begins with glycolysis, which occurs in the cytoplasm of the cell and converts glucose into pyruvate.

Pyruvate then enters the TCA cycle in the mitochondria, where it is further broken down into CO2 and water, releasing energy in the form of ATP. The final step is electron transport, where electrons are transferred to oxygen, producing water and ATP. This process is known as oxidative phosphorylation, and it generates most of the ATP in aerobic organisms.

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Answer:  \(C_6H_{14}\) is a hydrocarbon.

Explanation:

Alcohols are the compounds which contain -OH as the functional group. Example: \(CH_3OH\)

Amine are the compounds which contain \(-NH_2\) as the functional group. Example: \(CH_3NH_2\)

Ether are the compounds which contain \(ROR\) as the functional group. Example: \(CH_3OCH_3\)

Hydrocarbons are defined as the compounds in which bonds are present between carbon and carbon atoms. Hydrocarbons with single bond between carbon and carbon atoms are called as alkanes.The general formula for alkanes is \(C_nH_{2n+2}\) Example: \(C_6H_{14}\) which is named as hexane.

Answer:

D) Hydrocarbon

Explanation:

Completed the test and got it right

An electrolytic cell is a type of electrochemical cell that uses an externally applied voltage to drive a chemical reaction.

In an electrolytic cell, the applied voltage causes a reaction to occur, such as the oxidation or reduction of ions in the electrolyte or the decomposition of the material.

The voltage applied across the cell is known as the electrolytic voltage and is typically much higher than the cell's thermodynamic equilibrium voltage.

The electrolytic voltage is used to drive the reaction, and is typically provided by a battery, fuel cell, or other external power source.

The reaction that occurs during an electrolytic cell is characterized by its voltage, current, and power output.

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Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

The nursing approach that is most helpful to a client with Parkinson's disease experiencing freezing of gait and difficulty initiating movement is the "cueing" approach.

Cueing involves providing external prompts or cues to assist the client in overcoming freezing episodes and initiating movement. This approach helps to bypass the neurological impairments associated with Parkinson's disease and facilitates smoother and more coordinated gait patterns. Some effective cueing strategies that can be employed by nurses include: Visual cues: Placing brightly colored markers or stepping stones on the floor can help guide the client's footsteps and provide a visual target for stepping. It can help overcome freezing and encourage forward movement. Auditory cues: Providing rhythmic sounds, such as a metronome or music with a steady beat, can help establish a cadence and encourage a more regular gait pattern. The client can synchronize their steps with the auditory cue. Tactile cues: Gentle touch or pressure on the client's arm or back can provide a tactile cue to initiate movement. The nurse can lightly guide or propel the client forward during freezing episodes. Verbal cues: Using simple and clear verbal instructions or commands, such as "step" or "walk," can help trigger movement and prompt the client to initiate walking. Dual-tasking: Engaging the client in a secondary task, such as counting or carrying an object, can help shift attention and distract from freezing episodes, thereby facilitating smoother movement.

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Answer:

There are several natural events that can contribute to an increase in carbon dioxide (CO2) levels, but the most significant one is the process of respiration by living organisms, including plants and animals.

During respiration, living organisms take in oxygen and release carbon dioxide as a waste product. Plants also release carbon dioxide during the process of cellular respiration, but they also absorb carbon dioxide through photosynthesis, which helps to balance the carbon cycle.

Another natural event that can contribute to an increase in CO2 levels is volcanic eruptions. Volcanoes release large amounts of carbon dioxide, along with other gases and particles, into the atmosphere. While these emissions can have a short-term effect on local air quality and climate, they do not significantly contribute to the long-term increase in atmospheric CO2 levels.

Additionally, wildfires can also contribute to an increase in CO2 levels. When forests and other vegetation burn, they release carbon dioxide into the atmosphere, but again, the impact is relatively short-term.

However, human activities such as burning fossil fuels, deforestation, and industrial processes are the primary drivers of the long-term increase in atmospheric CO2 levels, which has contributed to global climate change.

The valence states provided are general representations and may vary depending on specific conditions and coordination environments.

a. Uvarovite: The mineral formula for uvarovite is Ca3Cr2(SiO4)3. In this formula, the valence state of calcium (Ca) is +2, the valence state of chromium (Cr) is +3, and the valence state of silicon (Si) is +4. Oxygen (O) is usually assigned a valence state of -2.

b. Azurite: The mineral formula for azurite is Cu3(CO3)2(OH)2. In this formula, the valence state of copper (Cu) is +2, carbonate (CO3) has a valence state of -2, and hydroxide (OH) has a valence state of -1.

c. Cuprite: The mineral formula for cuprite is Cu2O. In this formula, the valence state of copper (Cu) is +1, and oxygen (O) is usually assigned a valence state of -2.

d. Gypsum: The mineral formula for gypsum is CaSO4·2H2O. In this formula, the valence state of calcium (Ca) is +2, sulfur (S) has a valence state of +6, and oxygen (O) is usually assigned a valence state of -2. The water molecules (H2O) do not have a net charge.

e. Galena: The mineral formula for galena is PbS. In this formula, the valence state of lead (Pb) is +2, and sulfur (S) has a valence state of -2.

It's important to note that the valence states provided are general representations and may vary depending on specific conditions and coordination environments.

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Several problems can happen if an air conditioner is operated in a house that is not properly sealed and insulated.

Higher energy costs may result from the air conditioner having to work harder to maintain the intended temperature.

Through fractures, gaps, and inadequately insulated walls, the cold air generated by the air conditioner may escape the home, causing uneven cooling and discomfort for the residents.

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Answer:

196 grams

because ^^^ was wrong and person in comments said it was 196 and it was right

When NaOH of 4.00 g is being added with water, the mass of water required to create 2.00% of NaOH solution by mass is 196 g.

It means that the particular amount of solute in terms of percentage is present in the solute.

Given the mass of the solute, NaOH is 4.00g

Suppose the mass of water required to add is x in g.

The mass percent of the solute is

\(\dfrac{2}{100} =\dfrac{4.00}{4.00 +x }\)

x =196 g

Therefore, mass of water required to create 2.00% of NaOH solution by mass is 196 g.

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Answer:

option d in all direction

Explanation:

Answer

Explanation

The given balanced half-reaction for an acidic solution:

What to find:

Tha balanced half-reaction for a basic solution.

Step-by-step-solution:

To balance the half-reaction for a basic solution;

1. Add OH⁻ ions to BOTH SIDES to neutralize any H⁺

2. Combine H+ and OH- to make H2O.

3. Simplify by canceling out excess H2O

4. Balance the charges by adding e-

Titration is the correct answer.

What is titration?

Titration, commonly referred to as titrimetry, is a typical quantitative chemical analysis method used in laboratories to ascertain the unidentified quantity of an analyte (Mednick and Kirschner, 2010). Titration is frequently referred to as volumetric analysis because it relies heavily on volume measurements. To determine concentration, a solution of the analyte or titrant reacts with a known concentration and volume of the titrant. Titrations come in a variety of forms with various protocols and objectives. Redox and acid-base titrations are the two most typical types of qualitative titrations.

Acid-base titrations rely on the solution-based neutralisation of an acid and a base. The acid-base indicator changes colour to signal when the titration has reached its endpoint.

Titrations carried out in the gas phase are known as "gas phase titrations," and they are specifically used to identify reactive species through their reaction with an excess of a titrant gas. In one typical gas phase titration, nitrogen oxide and gaseous ozone are titrated in accordance with the reaction

The amount of analyte in the initial sample is determined by quantifying the remaining titrant and product after the reaction has finished (for example, using FT-IR).

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Solution of an unknown concentration that has another solution slowly added to it _____________.

Answer: 35.4 g/mol ; 16g/mol ;  30.07g/mol ; 32g/mol ; 16g/mol ; 32g/mol

Explanation: For CH4 : C=12g/mol ; H = 2g/mol

Hence CH4 is 16g/mol

For C2H6 : C = 12g/mol ; H = 2g/mol

Hence C2H6 is 30.07g/mol

For O2 : O = 16g/mol

Hence for O2 is 32g/mol

Answer:

true.

give brainliest pls :)

Answer: true

Explanation:

water exist in different states ​below 0° C and add s 15° C. true or false .

ffirst, rewrite the question correctly .

water exists in different  in different states below 0° C and AT 15° C.

true or false

true  water freezes at  0° C and above that hat temperature it is a liquid until it boils at  100° C  so at  15° C

Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl

To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7.  Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.

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H2O is composed of two hydrogen atoms and one oxygen atom. The central oxygen atom is sp3 hybridized.

H2O is composed of two hydrogen atoms and one oxygen atom. The oxygen atom is bonded to the two hydrogen atoms at a dihedral angle of 104°. There are two lone pairs on the oxygen atom. The molecule has a bent geometry.

The structure of H2O is shown in the image attached to this answer. The central oxygen atom is sp3 hybridized and the shape of the molecule is based on a tetrahedron owing to its electron pair geometry.

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the masses expect for nitrogen gas. Let's say x is the mass of nitrogen gas.

X=7g reaction of given the equation representing .

Nitrogen is important to the chemical industry. It is used to make fertilisers, nitric acid, nylon, dyes and explosives. To make these products, nitrogen must first be reacted with hydrogen to produce ammonia. This is done by the Haber process.

Every year people are killed by breathing “air” that contains too little oxygen. Because 78 percent of the air we breathe is nitrogen gas, many people assume that nitrogen is not harmful. However, nitrogen is safe to breathe only when mixed with the appropriate amount of oxygen.

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We can solve the problem using the Ideal Gas Law which states that:

PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant and T is the temperature.

Rearranging this equation, we get:

P = nRT/V.

We have to find the pressure of argon in kPa given that it fills an insulated, rigid container with a volume of 0.8 m3 and the temperature within the container is 83°C. The number of moles can be calculated as:

n = mass/molar mass = 5.2 kg/39.948 g/mol = 130.22 moles.

The gas constant R is equal to 8.314 J/(mol K).

The temperature has to be in Kelvin, which is equal to= 83°C + 273.15 = 356.15 K.

Therefore, the pressure can be calculated.

The pressure of the argon in kPa is 3696.98

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Out of the listed sources of error, the one that is not a source of error is "blood smear too new". This is because the age of the blood smear does not affect the quality of the smear stain for parasites.

However, if the blood smear is too thick, it may not spread evenly and result in uneven staining. If the stain buffer has the wrong pH, it can affect the quality and intensity of the stain. If the timing during staining is wrong, it can also affect the intensity of the stain. Therefore, it is important to ensure that the blood smear is of the right thickness, the stain buffer has the correct pH, and the timing during staining is accurate to obtain a good quality smear stain for parasites.

These blasts could be larger than typical white blood cells and could have a high nucleus-to-cytoplasm ratio. Additionally, a blood smear may reveal an increase in monocytes or promonocytes in cases of AML. Other than Auer rods, you would normally check for an increase in the number of immature myeloid cells known as blasts on a blood smear for acute myeloid leukaemia (AML). These blasts frequently have granules or other cytoplasmic inclusions and can have a high nucleus-to-cytoplasm ratio.

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Answer:

Fossil B was found at a depth of 185 meters below the Earth's surface, while fossil A was found at a depth of 50 meters below the Earth's surface.

Explanation:

Because if fossil B was found at a lower depth then it would be older than fossil A

Hope this helps, have a good day :)

Answer:

Fossil B was found at a depth of 185 meters below Earth's surface, while fossil A was found at a depth of 50 meters below Earth's surface.

Explanation:

I hope this is an answer choice but this would support fossil B being older than fossil A bc the deeper the fossils are in the earth’s surface means that its older.

La fuerza de la gravedad depende de la masa (el peso) de cada objeto. La fuerza con que se atraen dos objetos es proporcional a su masa y disminuye rápidamente en el momento en que los separamos. De hecho, nosotros también atraemos objetos con ‘nuestra’ fuerza gravitatoria, pero pesamos tan poco que no podemos percibirlo. En cambio, el Sol es tan grande que es capaz de mantenernos girando a su alrededor a pesar de estar muy lejos. La Luna también ejerce su propia fuerza gravitatoria, pero, como es más pequeña y ligera que la Tierra, si nos pesásemos sobre su superficie veríamos que pesamos unas seis veces menos que en la Tierra.

Podríamos preguntarnos por qué la Luna no cae sobre la Tierra al igual que una manzana cae del árbol. La razón es que nuestro satélite nunca está quieto. Se mueve constantemente a nuestro alrededor. Sin la fuerza de atracción terrestre, se alejaría flotando en el espacio. Gracias a esta combinación de velocidad y distancia de nuestro planeta, la Luna siempre está en equilibrio, ni cae ni se aleja. Si se moviera más rápido, se alejaría, si se moviera con más lentitud, ¡caería!

Hemos dicho que la fuerza de la gravedad también depende de la distancia. Si nos alejásemos lo suficiente de la Tierra, escaparíamos a su fuerza de atracción. Y eso es lo que tratamos de hacer con las naves espaciales. Necesitamos superar la llamada ‘velocidad de escape’, que es aproximadamente 11,2 km/s (a esa velocidad, podríamos viajar de Londres a Nueva York ¡en tan solo 10 minutos!). Cuando un cohete alcanza esa velocidad, ya es libre para viajar por el sistema solar.

Dentro de una nave en órbita, no sentimos la fuerza de la gravedad terrestre. Los objetos no caen, sino que flotan, así que si saltas, no regresas al suelo. Es lo que les ocurre a los astronautas cuando están a bordo de una estación espacial que orbita alrededor de la Tierra.

To confirm Newton’s Second Law using a laboratory report, you will need to conduct an experiment using a simulation and gather data. Newton’s Second Law states that force equals mass times acceleration.

Here's how you can write a laboratory report to confirm Newton’s Second Law using the simulation and gathered data. Introduction: This section should include a brief explanation of the theory behind Newton’s Second Law and what you will be testing in your experiment. It should also include your hypothesis.

Procedure: This section should explain the steps you took to conduct your experiment. In this case, it would involve using the simulation to apply different forces to objects with different masses and measuring their acceleration.

Data: This section should present the data you collected during your experiment. It can be presented in tables or graphs, and should include measurements of force, mass, and acceleration for each trial.

Analysis: This section should analyze the data you collected to determine if it supports your hypothesis and confirms Newton’s Second Law.

Conclusion: This section should summarize your findings and draw conclusions based on the data you collected. It should also discuss any errors or limitations of the experiment and suggest areas for further research.

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Answer:

C. 14

Explanation:

The mass number is the number of protons + neutrons and the atomic number is the number of protons.

If the mass number is 27, you subtract the atomic number, 13.

27 - 13 = 14 neutrons

Answer:

Nice experiment

Explanation:

It is difficult to draw a conclusive statement about the pHs of different categories of common substances because the pH of a substance is dependent on its specific composition. However, it is possible to make generalizations about certain categories of substances.

The pH of beverages can vary widely depending on their composition. Some common beverages such as water, milk, and pure fruit juices tend to have a pH close to neutral (pH 7). Other beverages such as carbonated soft drinks, energy drinks, and sports drinks tend to be acidic (pH less than 7) due to the presence of acids such as citric acid, phosphoric acid, and carbonic acid. Alkaline water and some herbal teas may have a pH greater than 7.

For example, acidic beverages are substances often associated with a higher risk of dental erosion and may be more likely to cause stomach discomfort in some individuals. On the other hand, alkaline beverages may have potential health benefits, but further research is needed to fully understand their effects on the body.

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The atmospheric pressure in the lab in atm is 1 atm.

Given atmospheric pressure in mm Hg is 760.

We need to convert this pressure from mm Hg to atm.

Atmospheric pressure can be measured in different units like mmHg, atm, Pa, and torr.

Here, we are going to convert the pressure from mmHg to atm using the following conversion factor.

1 atm = 760 mmHg

To convert from mmHg to atm, we divide the value in mmHg by 760.

760 mmHg = 760/760 atm = 1 atm

Therefore, the atmospheric pressure in atm is 1 atm.

We can also use the conversion factor to convert the pressure from mmHg to atm as follows:

760 mmHg x (1 atm/760 mmHg) = 1 atm

Hence, the atmospheric pressure found in the lab in atm is 1 atm.

The given conversion has been executed below.

760 mmHg × (1 atm / 760 mmHg) = 1 atm

Therefore, the atmospheric pressure in the lab in atm is 1 atm.

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