The pressure of a hydrogen balloon is 100.4 kPa. The balloon
floats away into the troposphere where the atmospheric
pressure is 95.6 kPa. What is the positive difference between
the pressure in the balloon and the pressure of the
troposphere in atm?
atm

Answer:

Benzene is a combination of carbon and hydrogen atoms. The hybridization is sp2 type. During the hybridization of benzene, each carbon atom forms different bonds with two other similar carbon atoms instead of just one.

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Explanation:  C) the air temp. at the top is lower

Answer:

it gives up electrons B. because the bond between the electrons is not very strong due to how few of them there are

Explanation:

Answer:

C. 60 mL

Explanation:

Boyle's Law P₁V₁ = P₂V₂

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

                   V₂ = 7500/125

                   V₂ = 60 mL

Answer:

Water softening is the process of removing the dissolved calcium and magnesium salts that cause hardness in water

Explanation:

Answer:

Scientists have observed that electromagnetic radiation has a dual "personality." Besides acting like waves, it acts like a stream of particles (called "photons") that have no mass. The photons with the highest energy correspond to the shortest wavelengths.

Explanation:

Hope It Help

Answer:

CO (carbon monoxide)

Explanation:

Answer:

I only know the answer to the second one, The bond that occurs between two metal atoms is a metallic bond

Answer:

where pic?

Explanation:

Answer:

19. C 20. A 21. H 22. G 23. D 24. F 25. B 26. E

Explanation:

Just learnt it in science class

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.

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Mark me brainliest....

:D

Answer:

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

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:

ur answer would be D.)

Explanation:

Hope this helps

also happy birthday

Answer:

What I've done:

Molar mass of Zn: 65.409 g/mol

Molar mass of Cl: 2*35.453 =70.906 g/mol

Molar mass of O: 6*15.9994 =95.9964 g/mol

Total molar mass of Zn(ClO3)2: 232.3114 g/mol

21% of molar mass = 232.3114 g/mol

100% of mass = 1106.244762 g/mol

Molar mass of H2O: 18.01528 g/mol

232.3114 g/mol + 18.01528 g/mol = 250.32668 g/mol

250.32668 = 1106.244762

1106.244762 g/mol divided by 232.3114 g/mol

x = 4.419

Explanation:

% anything = (g/total mass)*100 = ?

Atomic mass Zn = 65.4 from your post.

molar mass Zn(ClO3)2 from your post = 232.3

molar mass H2O = 18

The 21.5% Zn is (note you used 21%) percent Zn in the hydrate so

%Zn = [(65.4)/(232.3 + x*18)]*100 = 21.5%

Solve for x and I obtained 3.99 which rounds to 4.00. Let me know if you don't understand any part.

Answer:

A. Industrial waste

Explanation:

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:

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:

Subside

Explanation:

Answer:

lower, reduce, decline

Explanation:

Answer:

a

Explanation:

as the law of conservation of matter (mass) states: matter can not be created nor destroyed but can transform from a form to another.

since the conversion of mass to energy can not be done except in nuclear reactions via (E= mc2). normal chemical equations must be balanced to achieve the law.

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:

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:

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

The mass and velocity of an object determines its kinetic energy. The kinetic energy of the substance with mass of 10 kg and speed of 5 m/s is 125 J. Hence, option b is correct.

Kinetic energy of an object is generated by virtue of its motion. The kinetic energy is dependent to the mass and speed of the object by the expression written below;

Ke  = 1/2 mv²

Therefore, as the mass or speed or both increases kinetic energy increases. When an object starts moving its potential energy gets converted to kinetic energy.

Given that mass = 10 Kg

speed = 5 m/s

then Ke  = 1/2 10 kg × 5 m/s   × 5 m/s =  125 J

Therefore, the kinetic energy of the object is 125 J, option c is correct.

Find more on  kinetic energy:

https://brainly.com/question/26472013

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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]

2.55 × 10²⁴ molecules H₂O

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[Given] 76.4 g H₂O

[Solve] molecules H₂O

Step 2: Identify Conversions

Avogadro's Number

[PT] Molar Mass of H - 1.01 g/mol

[PT] Molar Mass of O - 16.00 g/mol

Molar Mass of H₂O - 2(1.01) + 16.00 = 18.02 g/mol

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

2.55317 × 10²⁴ molecules H₂O ≈ 2.55 × 10²⁴ molecules H₂O

Answer:

According to an energy pyramid model, Producer is expected have the largest biomass in land ecosystems

Explanation:

In a trophic level, the producers possess the largest biomass. With the increasing trophic level, the biomass reduces. Hence, the producers at the base have high biomass.

On terrestrial ecosystem, the producers are the plants and trees and hence the greatest biomass exists in the plants and trees.

Hence, in an energy pyramid model, Producer is expected have the largest biomass in land ecosystems  

Answer:

cell sap :)

Explanation:

Answer:

well

Explanation:

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