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2 years ago

Please help me I will really appreciate it !!!! And Please no links

Chemistry

1 answer:

BigorU [14]2 years ago

3 0

Explanation:

Steaming up or fogging happens when steam condenses on the mirror. Steam emerging from hot water can condense on a colder surface. That’s the reason you can see the result on a mirror instantaneously. Obviously, for a bathroom mirror to steam up, the steam that originates at the shower spray (or the bathtub) has to travel through the cooler air to reach the mirror. Since air tends to heat up easily, the mirror can steam up fast.

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Una masa de hidrogeno H2 ocupa un volumen de 12 litros a 730 mmHg. ¿Cuál es el volumen del gas a 1200 mmHg, si la temperatura pe

Alex

Answer:

ENGLISH PLEASE

Explanation:

4 0

2 years ago

What cause a mass defect?

Gelneren [198K]

Answer:

The answer is C.

Explanation:

Mass is converted to the energy binding a nucleus together.

5 0

2 years ago

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Acetylene (C2H2), an important fuel in welding, is produced in the laboratory when calcium carbide (CaC2) reacts with water: CaC

Anastaziya [24]

Answer:

There are 1.287 grams of acetylene collected

Explanation:

Total gas pressure = 909 mmHg

Vapor pressure of water = 20.7 mmHg

Pressure of acetylene = 909 mmHg - 20.7 mmHg = 888.3 mmHg

1mmHg = 1 torr

22 ° C + 273.15 = 295.15 Kelvin

Ideal gas law ⇒ pV = nRT

⇒ with p = pressure of the gas in atm

⇒ with V = volume of the gas in L

⇒ with n = amount of substance of gas ( in moles)

⇒ with R = gas constant, equal to the product of the Boltzmann constant and the Avogadro constant (62.36 L * Torr *K^−1 *mol^−1)

⇒ with T = absolute temperature of the gas (in Kelvin)

888.3 torr * 1.024 L = n * 62.36 L * Torr *K^−1 *mol^−1 * 295.15 K

n = 0.04942 moles of C2H2

Mass of C2H2 = 0.04942 moles x 26.04 g/mole = 1.287 g

There are 1.287 grams of acetylene collected

6 0

2 years ago

What kind of reaction occurs when you mix aqueous solutions of barium sulfide and sulfuric acid? what kind of reaction occurs wh

My name is Ann [436]

The kind of reaction that occurs when you mix aqueous solutions of barium sulfide and sulfuric acid is a precipitation reaction.

<h3>Further Explanation</h3>

The chemical reaction between Ba(OH)2(aq) and H2SO4(aq) is given by;

Ba(OH)₂(aq) + H₂SO4(aq) --> BaSO₄(aq) + 2H₂O(l)

This is a type of precipitation reaction, where a precipitate is formed after the reaction, that is Barium sulfate.

<h3>Other types of reaction</h3><h3>Neutralization reactions </h3>

These are reactions that involve reacting acids and bases or alkali to form salt and water as the only products.
For example a reaction between sodium hydroxide and sulfuric acid.

NaOH(aq) + H₂SO₄(aq) → Na₂SO₄(aq) + H₂O(l)

<h3>Displacement reactions</h3>

These are reactions in which a more reactive atom or ion displaces a less reactive ion from its salt.

Mg(s) + CuSO₄(aq) → MgSO₄(aq) + Cu(s)

<h3>Redox reactions </h3>

These are reactions that involve both reduction and oxidation occuring simultaneously durin a chemical reaction.
For example,

Mg(s) + CuSO₄(aq) → MgSO₄(aq) + Cu(s)

Magnesium atom undergoes oxidation while copper ions undergoes reduction.

<h3>Decomposition reactions</h3>

These are type of reactions that involves breakdown of a compound into its constituents elements.

For example decomposition of lead nitrate.

Pb(NO3)2(S) → PbO(s) + O2(g) + NO2(g)

Keywords: Precipitation

<h3>Learn more about: </h3>

Precipitation reaction: brainly.com/question/11194650
Examples of precipitation reactions: brainly.com/question/11194650
Neutralization reactions brainly.com/question/3243813

Level: High school

Subject: Chemistry

Topic: Chemical reactions

Sub-topic: Precipitation reactions

3 0

3 years ago

Read 2 more answers

Identify the atomic orbitals in the C-C sigma bond in ethyne (acetylene HC-triplebond-CH)

aleksley [76]

Answer:

Explanation:

A sigma bond is formed when a hybrid orbital sp overlaps with another hybrid orbital or with s- or p- orbital

Ethylene has a structural formula of H - C≡ C- H

At the ground state; we have :

C | ⇅ | |↑ | ↑

2s 2p

At the excited state, we have:

C | ↑ | |↑ | ↑ | ↑

the hybrid orbital

C = | ↑ | ↑ |

2sp

8 0

3 years ago