Burning Fuel. 100ml of water Empty cane = 9.33g Fuel Fuel sample initial mass, units(g) Fuel sample final mass, units (g) Water mass, units(g) Initial temperature, t1, units(C) Final (max) temperature, t2, units(C) Ethanol Burner 72.96 71.39 98.87 22 60 Candle 7.85 7.49 98.87 21 40 temperature change T for ethanol burner = final - initial = 60-22 = 38 temperature change T for candle = final - initial = 40-21 = 19 1) calculate the heat absorbed by the water, q, using the equation q = Cp•m•∆t, where q is heat, Cp is the specific heat capacity, m is the mass of water (not of the fuel sample, it is water whose change of temperature you were recording), and ∆t is the change in temperature. For water, Cp is 4.18 J/g•K. Convert your final answer to kJ. This heat was transferred to the water from the burnt fuel. Calculate the energy content (in kJ/g) of each fuel sample (divide kJ by the final-initial mass of the food in g). Finally, calculate the %efficiency in both trials of the experiment. The accepted heat of combustion of paraffin is 41.5 kJ/g, and for ethanol the value is 30.0 kJ/g. Fill in the table with the values you obtained. Fuel Heat produced, J Heat Produced, kJ Energy Content, kJ/g %efficiency name include calculations include calculations name What is the Fuel with the highest energy content? And why?

The four mole ratios are: 6 KOH / 2 K₃PO₄, 2 KOH / 1 Co₃(PO₄)₂,

1 K₃PO₄ / 1 Co₃(PO₄)₂, 1 Co(OH)₂ / 2 KOH.

Mole ratio refers to the ratio between the number of moles of two substances in a chemical reaction.

The given chemical equation is:

2 KOH + Co₃(PO₄)₂ → K₃PO₄ + Co(OH)₂

And the first mole ratio given is:

6 KOH / 2 K₃PO₄

To find the other mole ratios, we need to first balance the chemical equation. It is already balanced, so we can proceed to find the other mole ratios:

(2) 2 KOH / 1 Co₃(PO₄)₂

This ratio indicates that two moles of potassium hydroxide react with one mole of cobalt(II) phosphate.

(3) 1 K₃PO₄ / 1 Co₃(PO₄)₂

This ratio indicates that one mole of potassium phosphate is produced for every mole of cobalt(II) phosphate that reacts.

(4) 1 Co(OH)₂ / 2 KOH

This ratio indicates that one mole of cobalt(II) hydroxide is produced for every two moles of potassium hydroxide that react.

Therefore, the four mole ratios are:

(1) 6 KOH / 2 K₃PO₄

(2) 2 KOH / 1 Co₃(PO₄)₂

(3) 1 K₃PO4 / 1 Co₃(PO₄)₂

(4) 1 Co(OH)₂ / 2 KOH

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Correct question is:

KOH + Co₃(PO₄)₂ →

With the above balanced equation, make atleast four mole ratios ( one is done for you ):

\(\frac{6KOH}{2K3PO4}\)    -      -        -

William's grandfather has dementia . They feed him, bathe him, and care for his daily needs. William and his family are serving as volunteer caregivers.

Dementia is a condition in which a person loses so much of their ability to think, remember, and reason that it makes it hard for them to do things they normally do. Certain individuals with dementia have no control over their feelings, and their characters might change.

Dementia is brought about by harm to synapses. The ability of brain cells to communicate with one another is disrupted as a result of this damage. At the point when synapses can't convey regularly, thinking, conduct and sentiments can be impacted.

There is at present no "fix" for dementia. In fact, there is unlikely to be a single treatment for dementia because it is caused by multiple diseases. Curing diseases that cause dementia, such as Alzheimer's, frontotemporal dementia, and dementia with Lewy bodies, is the goal of research.

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Answer:

When water changes to a solid or gas, it's said that water changes to a different state of matter

Explanation:

Even when water physical form changes, the molecules stay the same. Water's molecules contains two hydrogen atoms that is bonded with one oxygen atom.

Dalton's atomic model, proposed by John Dalton in 1803, was one of the first scientific explanations of the nature of atoms. It is based on four key ideas: Atoms are indivisible and indestructible; Atoms of different elements have different atomic weights; Atoms of the same element are identical; Atoms combine in definite ratios to form compounds.

Atoms are indivisible and indestructible. This means that atoms cannot be broken down into smaller particles, and they cannot be created or destroyed.

Atoms of different elements have different atomic weights. This means that atoms of one element are different from atoms of another element based on their weight.

Atoms of the same element are identical. This means that all atoms of a given element have the same properties and characteristics.

Atoms combine in definite ratios to form compounds. This means that when atoms of different elements combine to form a compound, they do so in a specific ratio.

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Concrete contributes 3 % of the annual anthropogenic global \(CO_2\) production. The correct answer is option C.

Concrete is the second most widely consumed product globally after water. Concrete contributes 3% of the annual anthropogenic global \(CO_2\) production. This is due to the process of cement production, which involves the burning of fossil fuels to produce heat for the cement kilns.

The heat is used to break down the raw materials into calcium oxide and \(CO_2\). The \(CO_2\) is released into the atmosphere as a greenhouse gas, contributing to global warming. Therefore, the amount of \(CO_2\) emissions from concrete production is 3%. Option c is correct.

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Yes. Solubility is 0.070 kg/L

Solution:

Solubility = mass / Volume

Solubility = (0.210kg)/(3L) = 0.070 kg/L

Solubility is defined as the maximum amount of a substance that will dissolve in a specified amount of solvent at a specified temperature. Solubility is a characteristic property of a particular solute/solvent combination, and different substances have very different solubilities.

Adding sugar cubes to your tea or coffee is a common example of a solution. The ability of a sugar molecule to dissolve easily is called solubility. The term solubility can therefore be defined as the property of a substance to dissolve in a particular solvent. Water solubility is a measure of the amount of a chemical that can be dissolved in water at a given temperature.

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Answer:

It's B And if it is not, I help you to do more things that you need.

Answer:

Explanation:

Both eukaryotic and prokaryotic cells have a cell membrane, which defines the limit between the environment surrounding the cell and the cell itself.

Eukaryotic cells can be either animal cells or plant cells. Plant cells, apart from the membrane, are surrounded by a cell wall that is thick and conformed by carbohydrates and peptides. This cell wall makes the cell resistant and gives it its shape. Animal cells, on the other hand, do not have cell walls, they only have the cell membrane, that regulates the entrance of nutrients and the exit of metabolic products.

Answer:

I think D

Explanation:

Kinetic energy has a direct relationship with mass, meaning as mass increases so does the kinetic Energy of an object.

Rust is known as Iron (III) Oxide according to the IUPAC, and its chemical formula is Fe2O3.

Iron rusting is a chemical change since it involves the interaction of two substances to create a new one. Iron oxide is created during the rusting process by the reaction of iron and oxygen molecules.

Rust is described as the reddish brown layer that frequently develops on particular kinds of metal. These metals rust when they are exposed to air and moisture. The red material is created as a result of this combination's chemical reaction.

Rust's scientific name is iron oxide; its chemical formula is \($${Fe_2O_3}\). Metals that rust are those made of iron or iron alloys like steel. A chemical reaction takes place over time when iron comes into touch with airborne oxygen and water. This reaction creates iron oxide as a new chemical. The reddish hue of Mars is due to the abundance of iron oxide, which is present in nature and also on Mars.

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Answer:

the answer is A ( The basement)

HOPE THAT HELPSSS!!!

Answer the basement

Explanation: i took the test

Answer:

Hot magma rises from the mantle at mid-ocean ridges pushing the plates apart. Earthquakes occur along the fractures that appear as the plates move apart.:

Answer:

A I took this quiz today and got it right.

Glucose is polar and carbon tetrachloride is non polar so  it is the incorrect pair.

Water (H₂O) is the most appropriate solvent to dissolve sodium chloride (ionic). This is because sodium chloride is an ionic compound and water is a polar solvent, which means it can dissolve ionic compounds.

Acetone, methanol, ethanol, hexane, diethyl ether, toluene, and carbon tetrachloride are all non-polar solvents and are not suitable for dissolving ionic compounds like sodium chloride.

In fact, some of these solvents, like hexane and toluene, are not even soluble in water. So, to dissolve sodium chloride, it is recommended to use water as a solvent.

However, it's important to note that the solubility of sodium chloride in water decreases as the temperature decreases. At room temperature, approximately 36 grams of sodium chloride can be dissolved in 100 mL of water.

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If you leave a sink dripping on the same spot on a bar of soap for 45 minutes, about 54 grams of soap will be eroded and the soap will weigh about 81 grams.

Answer:

(D)=1.16g

Explanation:

Answer:

D) 1.16 g

I'm not sure about answer ..

"You have the same number of moles of each." is the true statement.

The mass of Gold and Silver differ, so that first statement can't be true because the quantities are the same. Because a mole measures solely amounts, like a dozen does, you will have the same amount of moles if the quantities are the same.

Answer:

B. metamorphic

Explanation:

Rocks formed under high heat and pressure is essentially the definition of metamorphic rock :)

Answer:

See explanation

Explanation:

The reaction between alcohol and acidified potassium dichromate  is a redox reaction. This reaction can be used to detect a drunken driver.

Alcohols can be oxidized to aldehydes, ketones and carboxylic acids depending on the structure of the alcohol. Primary alcohols yield adehydes and carboxylic acids while secondary alcohols are oxidized to ketones.

The colour of the acidified potassium dichromate turns from orange to green when exposed to alcohols from the breath of a drunken driver.

Answer:

5.52

Explanation:

2.76 10^-3 M = 2.76mM

2.76mM*2L= 5.52mmol

The fact that water has a high melting and boiling point (0°C/32°F for melting and 100°C/212°F for boiling) makes it unique.

When a substance's solid and liquid phases are in equilibrium, that point is known as its melting point. When a substance's vapour pressure matches the outside pressure, that's when it reaches its boiling point.

Saturation temperature is another name for boiling point. The pressure at when the measurement was made can occasionally be used to define boiling point. The standard boiling point is the temperature at which water begins to boil at one bar of pressure, according to the International Union on Pure an Applied Chemistry (IUPAC) definition from 1982.

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The role of hydrogen bonding in the ascent of xylem sap is quite complex and requires a long answer. Xylem sap is responsible for transporting water and nutrients from the roots to the leaves in plants, and it is transported through the xylem tissue.

The process of water transport in plants is primarily driven by a process called transpiration, which is the loss of water vapor from the leaves. As water evaporates from the leaves, it creates a negative pressure gradient that pulls water up from the roots. The water molecules are then pulled up through the xylem tissue due to the cohesive forces between water molecules, which is the attraction between molecules of the same substance.

Hydrogen bonding plays a key role in the cohesive forces between water molecules. The hydrogen atoms in one water molecule are attracted to the oxygen atoms in other water molecules, creating a network of hydrogen bonds that hold the water molecules together. This allows the water molecules to move in a continuous column, and as they move up the xylem tissue, they are able to pull more water molecules along with them due to the cohesive forces.

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The answer would be B: increases

Hope this helps! :)✨

As the water is heated, pressure increases and hence the volume of the balloon increases.

Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.

There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .

It is a scalar quantity which is related to the vector area element with a normal force acting on it.It is distributed over solid boundaries and across arbitary sections of fluid normal to the boundaries at every point.Pressure is inversely proportional to volume as per Boyle's law.

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Answer: If the object weighs more than an equal volume of water, then the object will have more dense and will sink. The less dense an object has it will float. You have to have both mass and volumes density to determine if the object will sink or float.

Explanation: hope it helps

Answer:

if you know the mass or volume you can decide is the object heavy or light by its mass.

Explanation:

ur welcome

Answer:

lots of things

Explanation:

batteries help us turn on power depending on the circuit it can also help us make things work, and turn things on, or make things move, it give everything power to do something

Answer:

Concept: Chemical Analysis

If 0.01 mol of neon gas at a particular temperature and pressure occupies a volume of 0.225 L, then 0.05 mol of neon gas would occupy a volume of 1.125 L under the same conditions.

Given:

Number of moles of neon gas (n₁) = 0.01 mol

Volume of neon gas (V₁) = 0.225 L

We are required to find the volume of neon gas (V₂) when the number of moles (n₂) is 0.05 mol under the same conditions.

The relationship between the number of moles, volume, and pressure of a gas is given by the ideal gas law: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

Since the temperature and pressure are the same in this case, we can rearrange the ideal gas law equation to solve for the volume:

V = (n₁ * V₁) / n₂

Substituting the given values into the equation:

V₂ = (0.01 mol * 0.225 L) / 0.05 mol

V₂ = 0.00225 L / 0.05 mol

V₂ = 0.045 L/mol

Therefore, 0.05 mol of neon gas would occupy a volume of 1.125 L under the same conditions.

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The number of cl- ions are there in 400.5 grams of alcl3 is 9.000 ions.

An atom or molecule with a net electrical charge is known as an ion. Conventionally, the charge of an electron is thought to be negative. This charge is equivalent to and opposite from the charge of a proton.

Lets start by calculating molar mass of AlCl₃

Molecular mass of Aluminium is 27 and that of Chlorine is 35.5

Al = 1 x 27 = 27

Cl = 3 x 35.5 = 106.5

AlCl₃ = 27 + 106.5

AlCl₃ = 133.5

The number of ions of Cl using proportions is

                  133.5 grams of AlCl₃ ------------- 3 ions of Chlorine

                  400.5 grams of AlCl₃ ------------   x

                  x = (400.5 x 3) / 133.5

                  x = 9

Therefore, the number of cl- ions are there in 400.5 grams of alcl3 is 9.000 ions.

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