Carbon is an element. What is the smallest particle of carbon that has the same
chemical properties of carbon?
a. an atom of carbon
c. an electron from a carbon atom
b. a proton from a carbon atom
d. a molecule that contains carbon

Answer:

23.3 g

Explanation:

0.356 mole × 65 = 23.3 g

At equilibrium the rate of forward reaction will be equal to that of the rate of backward reaction. The half life for the decomposition of dinitrogen tetroxide is 13.01 × 10⁻⁶ s.

The ratio of the product of the molar concentrations of the products to that of the reactants with each concentration term raised to a power equal to its coefficient in the balanced chemical equation is known as the equilibrium constant (K).

The given reaction is:

N₂O₄ (g) ⇄ 2NO₂ (g)

Here K = K₁ / K₂ = 14.48

K₁ - Forward reaction rate constant

K₂ - Reverse reaction rate constant

Rate of the reverse reaction = K₂ (NO₂)²

1324 = K₂ (0.6)²

K₂ = 1324 / 0.36

= 3677.7 M⁻¹s⁻¹

K₁  = 14.48 × K₂

= 14.48 × 3677.7

= 53253 s⁻¹

Then half life is:

\(t_{1} /_{2} = \frac{0.693}{K_{1} }\)

= 0.693 / 53253

= 13.01 × 10⁻⁶ s

Thus the half life is 13.01 × 10⁻⁶ s.

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Answer:

molecular formula = C₂₇H₃₆O₄₅

Explanation:

In order to find the molecular formula of a compound from its empirical formula, we need to know the number of "empirical formula units" that are in the molecular formula.

To find the number of empirical formula units, n,  we use the following formula:

\(\boxed{\mathrm{n = \frac{molar \ mass}{empirical \ formula \ mass}}}\).

The empirical formula mass is simply the molar mass of the compound that is represented by the empirical formula. Therefore, in this case,

Empirical formula mass of C₃H₄O₅ = (12 × 3) + (1 × 4) + (16 × 5)

                                                         = 36 + 4 + 80

                                                         = 120

Next, we can find the value of n using the above formula:

n = \(\frac{1080.54}{120}\)

  = 9.00

Now that we know the number of empirical formula units (n) present in the molecular formula, we simply have to multiply the number of each element present in the empirical formula by n:

Molecular formula = (empirical formula)ₙ

⇒ Molecular formula = (C₃H₄O₅)₉

                                   = C₂₇H₃₆O₄₅

Therefore, the molecular formula of the secret compound is C₂₇H₃₆O₄₅.

Answer:

C. Gases in the atmosphere prevent heat from escaping

Explanation:

Took one for the team and caught an L, C was the right answer

The greenhouse gases are known as the gases which absorb the infrared radiations and create greenhouse effect. Gases in the atmosphere prevent heat from escaping is the greenhouse effect. The correct option is C.

The process by which the radiations of the sun are absorbed by the green house gases and are not reflected back into the space is defined as the greenhouse effect. This insulates the earth and prevents it from freezing.

The green house effect increases the surface temperature of earth and also causes global warming.

Thus greenhouse effect is option C.

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Explanation:

A nitrogen-containing compound that shows no absorption band at around 3400 cm^−1 and no absorption bands between approximately 1700 cm^−1 and 1600 cm^−1 is likely an amide compound.

Amides typically exhibit a characteristic absorption band in the region of 3200-3500 cm^−1 due to the N-H stretching vibration. The absence of this absorption band suggests the absence of N-H bonds, which rules out compounds like primary or secondary amines.

The absence of absorption bands between 1700 cm^−1 and 1600 cm^−1 eliminates functional groups such as carbonyl compounds (e.g., aldehydes, ketones, carboxylic acids, esters) and imines, which typically exhibit absorption in this region.

Therefore, based on the given information, it can be inferred that the compound is likely not an amine, carbonyl compound, or imine. Other classes of compounds that do not possess these characteristic absorption bands would need to be considered.

Answer:

17.42 g of glucose, C₆H₁₂O₆

Explanation:

From the question given above, the following data were obtained:

Mass of water = 300.7 g

Molar solution = 0.322 M

Mass of glucose =.?

Next, we shall convert 300.7 g to L. This can be obtained as follow:

1000 g = 1 L

Therefore,

300.7 g = 300.7 g × 1 L / 1000 g

300.7 g = 0.3007 L

Next, we shall determine the number of mole of glucose in the molar solution. This can be obtained as follow:

Volume of solution = 0.3007 L

Molar solution = 0.322 M

Mole of glucose =?

Molar solution = mole / Volume

0.322 = mole of glucose / 0.3007

Cross multiply

Mole of glucose = 0.322 × 0.3007

Mole of glucose = 0.0968 mole

Finally, we shall determine the mass of glucose, C₆H₁₂O₆, needed to produce prepare the solution. This can be obtained as follow:

Mole of C₆H₁₂O₆ = 0.0968 mole

Molar mass of C₆H₁₂O₆ = (12×6) + (1×12) + (16×6)

= 72 + 12 + 96

= 180 g/mol

Mass of C₆H₁₂O₆ =?

Mole = mass /Molar mass

0.0968 = Mass of C₆H₁₂O₆ / 180

Cross multiply

Mass of C₆H₁₂O₆ = 0.0968 × 180

Mass of C₆H₁₂O₆ = 17.42 g

Thus, 17.42 g of glucose, C₆H₁₂O₆ is needed to prepare the molar solution.

The empirical formula of polyethylene can be determined by converting the given percentages of carbon (C) and hydrogen (H) into grams. To find the grams of each element, we assume a 100.0 g sample of polyethylene.

For carbon:

Mass of carbon = 86.0% × 100.0 g = 86.0 g

For hydrogen:

Mass of hydrogen = 14.0% × 100.0 g = 14.0 g

Therefore, in a 100.0 g sample of polyethylene, there are 86.0 grams of carbon and 14.0 grams of hydrogen.

The empirical formula of a compound represents the simplest whole-number ratio of atoms present in the compound. To determine the empirical formula, we need to find the ratio of carbon to hydrogen in terms of moles.

First, we convert the masses of carbon and hydrogen into moles using their respective molar masses. The molar mass of carbon is approximately 12.01 g/mol, and the molar mass of hydrogen is approximately 1.008 g/mol.

Number of moles of carbon = 86.0 g / 12.01 g/mol ≈ 7.162 mol

Number of moles of hydrogen = 14.0 g / 1.008 g/mol ≈ 13.89 mol

Next, we divide the number of moles of each element by the smallest number of moles to get a simplified ratio.

Carbon: Hydrogen ≈ 7.162 mol : 13.89 mol ≈ 1 : 1.939

Since we want to express the ratio in whole numbers, we multiply both sides by 2 to get a whole number ratio.

Carbon: Hydrogen ≈ 2 : 3.878

Rounding to the nearest whole number, we find that the empirical formula of polyethylene is CH₂.

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Answer:

It takes 0.27 second to travel the distance of  100 yard

Explanation:

We can use the formula ( t = d / s )t = d / s  = 91 m / 333 m/s  = 0.27 s

Answer:

O2 molecules are present in 0.470 g of oxygen gas

Explanation:

Answer:

the one above me is correct

An exclusion clause by the scientists might prevent a company or institution from using a solution discovered by these scientists.

Exclusion clauses can be defined as mutual agreements that exclude the use of the info for certain contentious types of research, which may hamper the use by the company of certain discoveries from these researchers beyond the scope of the work they have done.

Therefore, with this data, we can see that an exclusion clause in science may hamper the use of discoveries for a given company.

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Answer: A model would be useful because the model makes the concepts easier to understand.

Explanation:

Models are helpful tools in science education that can be used to enhance explanations, spark discussion, make predictions, provide visual representations of abstract concepts, and create mental models.

After the third energy level has 8 electrons (argon), the next 2 electrons go into the fourth energy level.

Explanation:

In order the atom to be stable the 3 energy level should carry only 8 electrons but 3 energy level can carry up to 18 electrons

Answer:

$9.97/kg

Explanation:

$4.53      2.2 lb      $9.97

-------  X --------    =   --------

 lb            kg             kg

Answer:

A combustion reaction is a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat.

The chemical formula O₂ which is oxygen is a molecule as it is made up  of 2 oxygen atoms.

Chemical  formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols  of elements. It also makes use of brackets and subscripts.

Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form  is called empirical formula.

It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.

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Answer:

D

Explanation:

The ratio of C6H12O6 (which will be referred to as "the carb") to oxygen is 1 to 6, so if we find an answer which has the same ratio, it should be chosen. A is 1:3
B is even worse with a ratio of the carb to oxygen of 1:2
C is the same as B, 1:2
D has a ratio of the carb to oxygen of 1:6, which is what we are looking for.

The reaction equation that is balanced is obtained as; \(P_{4} + 5O_{2} ----- > 2P_{2} O_{5}\)

We know that it is common to use a chemicals reaction equation to show what is going on in a reaction system. The chemical reaction equation would include the symbols of the elements that are combined in the reaction equation.

The first rule that must be observed when we are writing a balanced reaction equation is that the number of atoms of each element on the reactant side must be the same as the number of atoms of the same element on the left hand side. This is what we call an atom count. If the atom count is not complete it then follows that the reaction equation is not balanced as written

Having said this let us now attempt to write the balanced reaction equation between phosphorus and oxygen molecules which are both poly atomic.

The balanced reaction equation is; \(P_{4} + 5O_{2} ----- > 2P_{2} O_{5}\)

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The strand 1 of hydrocarbons is used to produce plastic, hence option D is correct.

Raw resources like natural gas, oil, or plants that have been processed into ethane and propane are used to make plastics. The subsequent "cracking" procedure uses heat to transform ethane and propane into ethylene and propylene. To produce various polymers, these components are mixed.

Propylene is a substance found in large quantities in petroleum. In order to speed up chemical processes, refiners combine heated propylene with a catalyst to create plastic. Propylene molecules start to cluster together like beads on a thread as a result.

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Answer:

it will crack because if the water inside of a rock freezes the water would start to expand and start stretching it causing it to break

Explanation:

So when something is boiling it is moving faster meaning the molecules are more spread out and not condense like a solid

So the answer is the 2nd set

Answer:

Astronomers identify numerous types of dwarf galaxies based on their shape and composition.

Explanation:

Answer:

A. prefixed with the letter "d"

Explanation:

Answer: m = 0.42; Tb = 79°

Explanation: The relationship between boiling point of the solvent above a solution is directly proportional to the molal concentration of the solute, i.e.:

ΔT = \(K_{b}.m\)

where

ΔT is the change in boiling point of the solvent;

\(K_{b}\) is the molal boiling point elevation constant;

m is the molal concentration of the solute in the solution;

For there two solutions:

1) Ethanol:

ΔT = \(K_{b}.m\)

Tb - \(T_{normal} = K_{b}.m\)

Tb - 78.4 = 1.22.m (1)

2) Carbon Tetrachloride:

Tb - \(T_{normal} = K_{b}.m\)

Tb - 76.8 = 5.03.m (2)

Solving the system of equations:

Tb - 78.4 = 1.22.m

Tb = 1.22.m + 78.4 (3)

Substituing (3) in (2)

1.22.m + 78.4 - 76.8 = 5.03m

3.81m = 1.6

m = 0.42

With m, find Tb:

T - 76.8 = 5.03.0.42

T = 2.11 + 76.8

T = 79°

Molal concentration is 0.42 and boiling point is 79°

Response:

Sorry but I think you forgot to attach or include something, thanks for the points tho!

Other:

Brainliest? Thanks!

Answer:

The answer is "\(1.25 \times 10^{-3} \ \frac{m}{s}\)"

Explanation:

Calculating the rate of the equation:

\(=-\frac{1}{2} \frac{\Delta [SO_2]}{\Delta t} =-\frac{\Delta [O_2]}{\Delta t}= +\frac{1}{2} \frac{\Delta [SO_3]}{\Delta t}\\\\=\frac{\Delta [SO_2]}{\Delta t}=\frac{0.0500-0.175\ M}{505}= -2.5 \times 10^{-3} \ \frac{m}{s}\\\\\)

Rate:

\(=\frac{-2.5 \times 10^{-3}}{2}=1.25 \times 10^{-3} \ \frac{m}{s}\)

Answer:

A precipitation is answer

There are 0.2107 moles of KBr are dissolved in 60.2 mL of a 3.50 M solution.

The molarity of a substance is defined as the number of moles of solute present in 1 litre of a solution.

According to the given data, the molarity of the solution tells us that there are 3.50 moles of KBr in 1000mL of solution. But we only have 60.2mL of solution, so with a mathematical rule of three we can calculate the amount of moles in 60.2mL:

1000 ml - 3.50 moles

60.2 ml -x = 60.2 ml× 3.50 moles/1000 ml

x= 60.2 ml -0.2107 moles

So, there are 0.2107 moles of KBr.

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Answer:

With the adsorption of cations like zinc as Zn (OH)+ or ZnCl+ or both, the anion exchange is known to increase. The solid phase has an impact on the anions' concentration in the soil solution. Anions are negatively adsorbed as a result of the exchange complex's overall negative charge.

According to this question, we must know that everything related to grams, means a mass of something.

So, we cannot use grams (g) or kilograms (kg) as a unit of volume.

For volume, we use liters (L), milliliters (mL), and cm^3 as we see on the written question. Also, we have plenty of units for volume in different systems used to measure.

Answer: milliliters (mL) or centimeters cubic (cm^3)