What is the experimental molar heat of combustion

The required mass of aluminum in 500g of [tex]Al(C_2H_3O_2)_3[/tex] is approximately 66.15 g.

To calculate the mass of aluminum in 500 g of [tex]Al(C_2H_3O_2)_3[/tex] (aluminum acetate), we need to follow these steps:

1. Molar Mass Calculation: Determine the molar mass of [tex]Al(C_2H_3O_2)_3[/tex] simply summing the atomic masses of each atom that makes up the molecule. The formula for aluminum acetate is [tex]Al(C_2H_3O_2)_3[/tex], which consists of 1 aluminum (Al), 6 carbon (C), 9 hydrogen (H), and 6 oxygen (O) atoms.

2. Atomic Masses from Periodic Table: Al = 26.98 g/mol, C = 12.01 g/mol, H = 1.01 g/mol, O = 16.00 g/mol

3. Molar Mass of [tex]Al(C_2H_3O_2)_3[/tex]:

Total molar mass = 204.13 g/mol

4. Determine Moles of [tex]Al(C_2H_3O_2)_3[/tex]:

5. Calculate Mass of Aluminum: Using the molar mass of aluminum (27.0 g/mol) and the calculated moles of [tex]Al(C_2H_3O_2)_3[/tex]:

Each mole of [tex]Al(C_2H_3O_2)_3[/tex] contains 1 mole of Al

Mass of Al = [tex]2.45\left mol \times 27.0\left g/mol = 66.15\left g[/tex]

The mass of aluminum in 500 g of [tex]Al(C_2H_3O_2)_3[/tex] is approximately 66.15 g.

.249 moles are in 1.5 x 10^20 molecules of [tex]NH_3[/tex].

A mole is a very important unit of measurement that chemists use. A mole of something means you have 602,214,076,000,000,000,000,000 of that thing, like how having a dozen eggs means you have twelve eggs.

To solve this equation, you will use Avogadro's constant (6.02 x 10^23) to convert the number of molecules to moles. we need to divide the molecules given by this constant:

[tex]\frac{1.50 X 10^2^3}{6.02 X 10^2^3}[/tex] = .249

So, the answer is .249 moles.

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The answer is D. all of these

Change in state, change in color, and change in odor are three signs that a chemical reaction has taken place.

A chemical reaction is a process in which the atoms or molecules of one or more substances (known as reactants) are rearranged to form one or more different substances (known as products).

During a chemical reaction, chemical bonds between atoms are broken and new bonds are formed between different atoms. It results in the creation of new chemical compounds with unique properties.

Chemical reactions can be represented by chemical equations that show the reactants and products involved in the reaction. These reactions can be exothermic (releasing energy) or endothermic (requiring energy). They play a crucial role in various natural and industrial processes.

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To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. The correct option is option B.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.

In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron. In the given compound, Calcium = 1 atom, Sulfur = 1 atom, Oxygen = 4 atoms.

Therefore, the correct option is option B among all options.

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Answer:

It's supergiant.

Explanation:

I took the test.

Answer:

In commensalism one of the organisms benefits while the other receives no benefit but is unharmed. In mutualism, both organisms benefit.

Explanation:

The exact answer on Edg

Answer:

#2

Explanation:

Yes, the reaction is balanced as shown

Since the same number of each type of atom occurs on both sides of the arrow, the reaction in the above chemical equation is balanced. Ensuring that the total mass of reactants and products is equal, the law of conservation of mass is respected.

One molecule of [tex]C_6H_{12[/tex] and nine molecules of oxygen (O₂) can be converted into six molecules of carbon dioxide (CO₂) and six molecules of water (H₂O) by varying the coefficients, resulting in a balanced chemical equation.

Missing parts;

Is the reaction; [tex]C_6H_{12}(l)+9O_2(g)- > 6CO_2(g)+6H_2O(g)[/tex] balanced

Water table is the underground region between where water saturates pores and where it does not.

Answer: B

Explanation

It is known that water is present below the ground. The rocky terrain inside the ground contains water and the water will be filled in the pores between the rocks.

The water filled in the saturated region below the ground is separated from the unsaturated region which is the region above the ground by a surface termed as water table.

The unsaturated region is the soil above the ground and the plants get water from this region.

The water is present in unsaturated region occupy between the pores of rocks and soils but they are loosely filled so that plants can extract water from them.

Then below the ground water table region will be present and below the water table the saturated water region is present.

So water table is the region dividing the saturated and unsaturated water pore regions.

A row of cypress trees lined the bank uses the word bank in the same context as the example sentence. Therefore, the correct option is option A.

Context in writing is information that aids readers in correctly interpreting a text's meaning. Context can take many different forms, such as background information or specifics of the events, setting, or period of time in which a work is set. Context is characterised by its ability to make a written work's meaning more clear.

The circumstances whereby a specific piece of writing is produced are referred to as the rhetorical context. It takes into account things like the author's background, the situation or purpose for the writing, as well as the intended readership. A literary work is made richer by context, which also aids in drawing readers fully into the narrative. For both writers and readers, context is crucial. A row of cypress trees lined the bank uses the word bank in the same context as the example sentence.

Therefore, the correct option is option A.

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According to the question the correct answer is: A. a row of cypress trees lined the bank.

The sentence that uses "bank" in the same context as the example is: 'a row of cypress trees lined the bank'. Here, 'bank' refers to the land beside a river or body of water.

In this context, the word "bank" refers to the land alongside a river or body of water, similar to the example sentence where the boat was moored on the bank (the edge of a river).

Final answer:

A methane (CH4) molecule is nonpolar due to its symmetrical tetrahedral structure and equal sharing of electrons in non-polar covalent bonds, resulting in a balanced distribution of charge.

Explanation:

The molecule of methane, CH4, is nonpolar because its molecular structure is tetrahedral, with each of the four hydrogen atoms symmetrically arranged around the central carbon atom. This symmetrical arrangement allows the electrons to be shared equally among the C-H bonds, resulting in a molecule with no net dipole moment.  The carbon and hydrogen atoms also have similar electronegativities, leading to non-polar covalent bonds. Thus, overall, the distribution of charge throughout the molecule is even, making methane nonpolar.

Furthermore, the tetrahedral geometry of methane ensures spatial symmetry, preventing any concentration of charge in a particular direction. This molecular symmetry, combined with the homogeneity of carbon-hydrogen bonds, results in a nonpolar molecule, underscoring the significance of both structural and electronegativity factors in determining the overall polarity of compounds. This molecular characteristic is vital in understanding methane's behavior in various chemical and physical interactions.

Answer:

631.3 milligrams of oxygen gas will react with the TNT.

Explanation:

[tex]4C_7H_5N_3O_6+21O_2\rightarrow 28CO_2+10H_2O+6N_2[/tex]

Moles of TNT = [tex]\frac{0.853 g}{227 g/mol}=0.003758 mol[/tex]

According to reaction , 4 moles of tNT react with 21 moles of oxygen gas.

Then 0.003758  moles of TNT will react with:

[tex]\frac{21}{4}\times 0.003758 mol=0.01973 mol[/tex]

Mass of 0.01973 moles of oxygen ;

[tex]0.01973 mol\times 32 g/mol=0.6313 g=631.3 mg[/tex]

( 1 g = 1000 mg)

631.3 milligrams of oxygen gas will react with the TNT.

Answer:   Long term storage of energy

Explanation:  Triglycerides are the fats or basically lipids which are found in the blood.

They are the source of the long term storage of energy.

They are primarily used as storage of the energy because the its oxidation will produce twice as much energy than the oxidation of the carbohydrates.

Thus it is better to store the energy which we take from the food to store as triglyceride.

Answer:

Original pressure = P1 = 11.3 atm

Final volume = V2 = 24.5 L

Explanation:

Given data:

Initial conditions:

Volume V1 = 0.851 L

Temperature T1 = 150.0 K

Moles of He n1 = 0.783

From ideal gas equation:

[tex]PV = nRT\\\\P = \frac{nRT}{V}[/tex]

Substituting the initial V, T and n using R = 0.0821 L.atm/mol-K we get:

[tex]P1 = \frac{0.783*0.0821*150.0}{0.851} = 11.33 atm[/tex]

Final conditions:

T2 = 305 K

P2 = 0.800 atm

Since the number of moles of He will remain constant we can write:

[tex]\frac{P1V1}{T1} = \frac{P2V2}{T2} \\\\V2 = \frac{P1*V1*T2}{T1*P2} = \frac{11.33*0.851*305}{150*0.800} =24.50 L[/tex]

A, Solar energy

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Answer:

a and B I got an 100% and I'm getting a 99.7 in history k12

Explanation:

The equation P4 + SO2 → 2P4O10 does not demonstrate the law of conservation of mass.

In equation P4 + SO2 → 2P4O10, the mass of the reactants are not equal to the mass of the products. Therefore, this equation does not obey the law of conservation of mass.

Hence, we can conclude that option C is the answer.

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Answer:

The answer is they reproduce with only one another.

Explanation:

In biology, species is a term that can be defined as a group of organisms that can reproduce with one another and give birth to fertile offspring. In other words, the organisms in one species cannot reproduce with organisms in another species. So, to be considered as part of the species, this criteria is very important.

The acceleration of your bicycle can vary depending on the situation. If you are riding at a constant speed, your acceleration would be zero. However, if you are starting from rest or changing your speed, you would have a non-zero acceleration.

The acceleration of your bicycle as you ride it from your home to the store can vary depending on the situation. If you are riding at a constant speed, your acceleration would be zero because acceleration is the rate of change of velocity, and constant speed means there is no change in velocity. However, if you are starting from rest and gradually speeding up or slowing down, then you would have a non-zero acceleration.

For example, if you start from rest at your home and gradually increase your speed as you ride to the store, your acceleration would be positive. On the other hand, if you start at a high speed and gradually slow down as you approach the store, your acceleration would be negative.

It's important to note that acceleration is a vector quantity, meaning it has both magnitude and direction. So, depending on the direction of your motion, the acceleration could be positive or negative.

Over-fishing is a threat to biodiversity resulting from human impact, specifically through unsustainable resource exploitation. Thus option C) 'Human Impact' is correct.

The correct answer to the question is Human Impact.

While global climate change and habitat loss are significant threats to biodiversity, they are typically not the direct result of over-fishing. Instead, over-fishing directly exemplifies how human impact on the environment can lead to unsustainable resource use and endanger species.

Complete question: Which of the following threats to biodiversity is a result of over-fishing?

A)Global Climate Change

B)Habitat Loss

C)Human Impact

D)Invasive Species

Correct option: C) Human impact