help
so I put this as a chemistry question but I don't think it is but you y'all could still help me that would be very appreciated

Answer:

A Mixture

B compound

C element

D element

E. Compound

F mixture

G compound

Explanation:

A compound is formed from the chemical reaction between two or more atoms

A Mixture is formed when two or more elements are physically combined

An element is any substance that contains only one kind of an atom

Answer:

305 mg

Explanation:

The equation of the reaction is;

C9H8O4 + NaOH = C9H7O4Na + H2O

Amount of NaOH reacted = 15.5/1000 L * 0.109 M = 1.69 * 10^-3 moles

Since the reaction has a 1:1 mole ration, 1.69 * 10^-3 moles of acetylsalicylic acid reacted.

Assuming all the acetylsalicylic acid reacted, then mass of acetylsalicylic acid present = 1.69 * 10^-3 moles * 180.158 g/mol = 0.305 g or 305 mg

Answer:

2.5 M H2SO4

Explanation:

2.5 mol / 1.00 L = molarity of 2.5

This question is incomplete, the complete question is;

An oxygen  (O₂) molecule is adsorbed on a patch of surface (see sketch at right). This patch is known to contain 324 adsorption sites.

The  (O₂) molecule has enough energy to move from site to site, so it could be on any one of them.

Suppose part of the surface becomes inaccessible, so that only 400 adsorption sites are now available for the molecule.

Calculate the change in entropy.

Round your answer to 3 significant digits, and be sure it has the correct unit symbol.

Answer:

the change in entropy is 2.91  x 10⁻²³ J/K

Explanation:

Given the data in the question;

For an ideal gas,

Entropy of a molecule, S = K[tex]_B[/tex] ln(W)

where K[tex]_B[/tex]  is Boltzmann constant (1.38065 x 10⁻²³ J/K)

W is Equivalent micro states of the molecule

( W[tex]_{initial}[/tex] = 324   and W[tex]_{final}[/tex] = 400 )

S[tex]_{final}[/tex] - S[tex]_{initial}[/tex] = K[tex]_B[/tex] ln(W[tex]_{final}[/tex]) - K[tex]_B[/tex] ln(W[tex]_{initial}[/tex] )

ΔS = K[tex]_B[/tex] ln(W[tex]_{final}[/tex] / W[tex]_{initial}[/tex] )

we substitute

ΔS = (1.38065 x 10⁻²³ J/K) × ln( 400 / 324 )

ΔS = 2.9093  x 10⁻²³ J/K

ΔS = 2.91  x 10⁻²³ J/K

Therefore,  the change in entropy is 2.91  x 10⁻²³ J/K

Answer:

Hey mate.....

Explanation:

This is ur answer....

Plastics are produced from natural gas, feedstocks derived from natural gas processing, and feedstocks derived from crude oil refining.

Hope it helps,

Mark me brainliest....

:D

Answer:

Oil and natural gas are chemically broken down into small compounds that combine to form plastic.

Answer:

C. 60 mL

Explanation:

Boyle's Law P₁V₁ = P₂V₂

                   (50kPa)(150.0mL) = (125kPa)(V₂)

                   V₂ = 7500/125

                   V₂ = 60 mL

Answer:

Explanation:

From the information given:

Step 1:

Determine the partial pressure of each gas at total Volume (V) = 4.0 L

So, using:

[tex]\text{The new partial pressure for }N_2 \ gas}[/tex]

[tex]P_1V_1=P_2V_2[/tex]

[tex]P_2=\dfrac{P_1V_1}{V_2} \\ \\ P_2=\dfrac{2.1 \ bar \times 1\ L}{4.0 \ L} \\ \\ P_2 = 0.525 \ bar[/tex]

[tex]\text{The new partial pressure for }Ar \ gas}[/tex]

[tex]P_2=\dfrac{P_1V_1}{V_2} \\ \\ P_2=\dfrac{3.4 \ bar \times 2 \ L}{4.0 \ L} \\ \\ P_2 = 1.7 \ bar[/tex]

[tex]Total pressure= P [N_2] + P[Ar] \ \\ \\ . \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ = (0.525 + 1.7)Bar \\ \\ . \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ = 2.225 \ Bar[/tex]

Now, to determine the final pressure using different temperature; to also achieve this, we need to determine the initial moles of each gas.

According to Ideal gas Law.

[tex]2.1 \ bar = 2.07 \ atm \\ \\3.4 \ bar = 3.36 \ atm[/tex]

For moles N₂:

[tex]PV = nRT \\ \\ n = \dfrac{PV}{RT}[/tex]

[tex]n = \dfrac{2.07 \ atm \times 1 \ L }{0.08206 \ L .atm. per. mol. K \times 304 \ K}[/tex]

[tex]n = 0.08297 \ mol \ N_2[/tex]

For moles of Ar:

[tex]PV = nRT \\ \\ n = \dfrac{PV}{RT}[/tex]

[tex]n = \dfrac{3.36 \ atm \times 1 \ 2L }{0.08206 \ L .atm. per. mol. K \times 377 \ K}[/tex]

[tex]n = 0.2172 \ mol \ Ar[/tex]

[tex]\mathtt{total \ moles = moles \ of \ N_2 + moles \ of \ Ar}[/tex]

[tex]=0.08297 mol + 0.2037 mol \\ = 0.2867 mol gases[/tex]

Finally;

The final pressure of the mixture is:

[tex]PV = nRT \\ \\ P = \dfrac{nRT}{V} \\ \\ P = \dfrac{0.2867 \ mol \times 0.08206 \ L .atm/mol .K\times 377 K}{4.0 \ L}[/tex]

P = 2.217 atm

P ≅ 2.24 bar

Answer:

I think one significant figure??

Answer:

CO (carbon monoxide)

Explanation:

Answer:

B.

Explanation:

There are the same amount of black circles in the reactant and product. There are also the same amount of white circles in the product and reactant.

Plant and animals both are eukaryotes but differ in cell walls, photosynthesising pigments etc. Tulip Cell is a plant cell whereas, the baby chick cell is an animal cell.

The major difference between a plant and animal cell is the cell wall. Plant cells have a cell wall that helps them in maintaining the structure but the animals' cells lack a cell wall and do not have a definite shape.

Plant cells contain chloroplast and chlorophyll pigment that enables them to make food while the animals can not make food because of the absence of the chloroplasts.

Plant cells consist of large vacuoles while the animal cells lack large vacuoles and instead have numerous small ones.

Therefore, a tulip cell and a baby chick cell are different.

Learn more about plant and animal cells here:

https://brainly.com/question/26061291

Answer:

Lipids

Explanation:

Lipids are a class of macromolecules that are nonpolar and hydrophobic in nature. Major types include fats and oils, waxes, phospholipids, and steroids.

Hope this helps!

Answer:

dont do it , it gave me a virus

Explanation:

Answer:

Explanation:

The task in this question is to match the right procedure to its purpose. It explains the procedure for the preparation of Fischer Esterification. Fischer Esterification Mechanism should incorporate the ceaseless expulsion of water from the framework or the use of a huge amount of excess alcohol since the general reaction is reversible. Fischer Esterification act as an organic reaction that is utilized to change over carboxylic acids within the sight of excess alcohol and a solid corrosive catalyst (acid) to give an ester as the eventual outcome.

Procedure                                                                Purpose

[tex]\text{Flat bottomed flask transfer}\\ \\ \text{ heat in an uneven fashion and } \\ \\ \text{ may fracture if heated strongly}[/tex]                     [tex]\text{The reagents were added to a} \\ \\ \text{round bottom flask prior to the }\\ \\ \text{reaction being heated under reflux}[/tex]

[tex]\text{Methanol which used as a reagent} \\ \\ \text{and solvent is flammable}[/tex]                 [tex]\text{The solution of benzoic acid and }\\ \\ \text{methanol was heated on steam bath}[/tex]

[tex]\text{The unreacted carboxylic acid was} \\ \\ \text{neutralized under mild conditions}[/tex]               [tex]\text{The reaction mixture was washed} \\ \\ \text{ with sodium bicarbonate solution}[/tex]

[tex]\text{Water needs to be removed before the} \\ \\ \text{ liquid ester product was collected}[/tex]          [tex]\text{Magnesium sulphate is added to the} \\ \\ \text{ dichloromethane layer before} \\ \\ \text{ the solvent is distilled off}[/tex]

Answer:

A photons is a particle representing a quantum of light or other electromagnetic radiation. A photon carries energy proportional to the radiation frequency but has zero rest mass.

Explanation:

Light consists of packets of energy (photons) that can only interact with the atoms and molecules of matter by being absorbed or emitted in discrete units. ... Photons carry momentum and energy like particles, but they also have a frequency and a wavelength like a sinusoidal wave. Thanks to photons we know that all quantum particles have both the properties of waves and particles. I hope it helps✌️

Answer:

cell sap :)

Explanation:

Answer:

well

Explanation:

Answer:

Quantity of substance = (number of moles / number of molecules)

Explanation:

How much does carbon dioxide weigh?

Give me the answer to calculate for you

Answer:

ok so if I remember correctly then it basically its like if I have a baseball and throw it full force the the ball will go far because the mass is light and the force was great but if I get a bowling ball and do the same with equal force it will go shorter than the base ball because the mass if more than the force I put in

Answer:

0.27 moles

Explanation:

Find the mass of BaCl2 using the atomic masses on the periodic table

137.33+35.45*2=208.23 grams

Convert to moles

56 grams BaCl2 * 1 mol/208.23 grams= 0.268933391

Answer:c

Explanation:

The healthy lion population in the African savanna has been important as the decrease in the population of lions results in the increase in the increased population of zebras and antelopes and thereby the increased overgrazing. Thus, option C is correct.

In an ecosystem, the biotic components have been arranged in the pyramidical order that has been able to maintain a healthy ecosystem.

The increase or decrease in the level of the ecosystem results in the disturbed ecosystem and thereby the biodiversity. The African savanna has been the forest ecosystem. It has been photosynthetic plants, followed by primary, secondary, and tertiary consumers.

The lion has been the secondary consumer in the forest system. The lions have been able to consume the primary consumers and maintain the balance in the ecosystem.

However, with the decrease in the lion population in the ecosystem, there has been a proportional increase in the population of the primary consumers such as zebras, and antelopes.

The increase in primary consumers results in overgrazing and thereby the starvation of other primary consumers with a decrease in the producers.

Thus, a decrease in the lion population results in disturbing the biodiversity of the ecosystem with an increase in the population of zebras and antelopes. Thus, option C is correct.

For more information about the African Savannas ecosystem, refer to the link:

https://brainly.com/question/4088008

centimetres

Explanation:

centimetres

Answer:

D. Centimeter is used when measuring the length of a paperclip

Answer:

5kg

Explanation:

Use the law: F=MA

F= force which is newton

M= mass which is kg

A= acceleration which is [tex]m/s^{2}[/tex]

Answer:

Option B. 101.60 KPa

Explanation:

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

Total pressure (Pₜ) = 105.00 KPa

Partial pressure of wet gas (Pᵥᵥ) at 26 °C = 3.4 KPa

Partial pressure of dry gas (Pₔ) =?

Total pressure = partial pressure of dry gas + partial pressure of wet gas

Pₜ = Pₔ + Pᵥᵥ

105 = Pₔ + 3.4

Collect like terms

105 – 3.4 = Pₔ

Pₔ = 101.60 KPa

Therefore, the partial pressure of the dry gas is 101.60 KPa

Answer:

In a solution containing ammonia solution and ammonium chloride, ammonia hydrolyses in water to produce hydroxyl ions.

NH3 +H2O → NH4+ + OH-

Ammonium chloride ionises in the solution to produce ammonium ions and chloride ions where the ammonium ions undergo hydrolysis to produce more ammonia solution.

[tex]NH _{4} Cl→NH _{4} {}^{ + } + Cl {}^{ - } [/tex]