CHEMISTRY HIGH SCHOOL

Consider the
solubility curve at
right. Which
material is a
gaseous solute?

Answers

Answer 1

Answer:

Answer:

Substance A

Explanation:

See attached worksheet,

The solubility of gasses decreases as temperature rises.

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Enter the symbol of a sodium ion, Na+, followed by the formula of a sulfate ion, SO42−. Separate the ions with a comma only—spaces are not allowed. Express your answers as ions separated by a comma.

Answers

Sodium and sulfate are known to form the anion and cation by the gain and loss of electrons. Sodium forms a cation, Na⁺ and sulfate form anions, SO₄²⁻.

What are anions and cations?

Anions and cations are ions formed as charged entities formed by losing and gaining electrons from the valence shell. They completely transfer their electrons to form the ionic bond.

The cation is formed by the loss of electrons from a neutral atom when there are more electrons in the valence shell. Sodium form cations as,

Na (neutral atom) - e⁺ → Na⁺ (cation)

The anions are formed by gaining electrons from a neutral atom when there is less number of electrons in the valence shell. Sulfate form anions as,

SO₄ (neutral atom) + e⁻ → SO₄²⁻ (anion)

Therefore, ions are Na⁺, SO₄²⁻.

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The respective symbols of sodium and sulphate ions are $\boxed{{\text{N}}{{\text{a}}^ + },{\text{ SO}}_4^(2 - )}$ .

Further explanation:

The species that are produced after loss or gain of electrons are known as ions. Since ions are charged entities, these can be either positively charged or negatively charged. The positively charged ions are formed by the loss of electrons from the neutral atom and are known as cations. The negatively charged ions are called anions and are formed by the gain of electrons to the neutral atom.

The formation of anion occurs as follows:

${\text{A}}\left( {{\text{Neutral atom}}} \right) + {e^ - } \to {{\text{A}}^ - }\left( {{\text{Anion}}} \right)$

The formation of cation occurs as follows:

${\text{C}}\left( {{\text{Neutral atom}}} \right) - {e^ - } \to {{\text{C}}^ + }\left( {{\text{Cation}}} \right)$

The atomic number of Na is 11 so it has a configuration of $1{s^2}2{s^2}2{p^6}3{s^1}$ . It easily loses its 3s electron to form ${\text{N}}{{\text{a}}^ + }$ whose configuration becomes $1{s^2}2{s^2}2{p^6}$ . These ions are beneficial for heart activity, regulation of blood and body fluids and in transmission of nerve impulses. The formation of ${\text{N}}{{\text{a}}^ + }$ occurs as follows:

${\text{Na}}\left( {1{s^2}2{s^2}2{p^6}3{s^1}} \right) - {e^ - } \to {\text{N}}{{\text{a}}^ + }\left( {1{s^2}2{s^2}2{p^6}} \right)$

${\text{SO}}_4^(2 - )$ is a polyatomic ion that involves a central sulphur atom surrounded by four oxygen atoms and has a charge of -2 on it. These ions are used as cleansing agents in soaps and shampoos.

Learn more:

Balanced chemical equation: brainly.com/question/1405182
Identify the precipitate in the reaction: brainly.com/question/8896163

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Ionic compounds

Keywords: ions, cations, anions, loss, gain, electrons, Na, Na+, A, C, A-, C+, atomic number, configuration, formation.

How many moles of sodium hydroxide, NaOH, are in a 35.65 g sampleof NaOH? (The molar mass of NaOH is 40.01 g/mol.)

Answers

A 35.65 g sample of NaOH contains 0.8910 moles of NaOH.

What is mole?

The mole, denoted by the sign "mol," is the volume of a system that has the same number of atoms in 0.012 kilograms of carbon-12 as there are elementary particles.

The mole, often known as mol, is a SI unit used to measure how many particles are present in a given substance. A mole is made up of 6.02214179 atoms or other fundamental building blocks like molecules.

Mass off NaOH = 39.997

given = 35.65 g of NaOH

No of moles of NaOH =35.65 g of NaOH × 1 mol NaOH /40.01 g

No of moles of NaOH = 0.8910 moles.

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Answer:

0.8910 mols of NaOH in a 35.65 g sample of NaOH

Explanation:

Mass off NaOH = 39.997

given = 35.65 g of NaOH

35.65 g of NaOH * 1 mol NaOH = 0.8910, since there are 4 sig figs.

/40.01 g

The ratio of H2 gas to O2 gas will always remain 2:1, and the ratio of H2 gas to H2O gas will remain 1:1 so if the gas volumes are measured at the same temperature and pressure: 44.8 liters of H2 + _____ liters of O2 → ____ liters of H2O

Answers

Final answer:

Given 44.8 liters of H₂ gas, 22.4 liters of O₂ gas would be required for a complete reaction, producing 44.8 liters of H₂O gas. This conclusion is reached by leveraging Avogadro's law, ideal gas law, and understanding stoichiometry.

Explanation:

The question involves understanding how standard molar volumes and stoichiometry play into gas reactions. Avogadro's law states that the volume of a gas is directly proportional to the number of moles of the gas. Therefore, if you have 44.8 liters of H₂ gas, complying with Avogadro's law and the given ratios of gases as stated in the problem, you can conclude that to react completely, you would need 22.4 liters of O₂ gas, producing a total of 44.8 liters of H₂O gas as per reaction stoichiometry.

Avogadro's law is critical to understanding gas behavior and stoichiometry. Equally, understanding the concept of the ideal gas law is necessary to perform stoichiometric calculations involving gaseous substances.

Dalton's law of partial pressures also plays into calculations involving gaseous mixtures and helps to understand how different gases within a mixture interact. Overall, comprehending these concepts grants insights into gas behavior under varying temperature, pressure, and volume conditions and how gases react in chemically balanced equations.

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44.8 liters of H2 + 22.4 liters of O2=44.8 liters of H2O

What is the scale factor used to create a model of an animal from the actual animal? 1) 1:10 2) 1:20 3) 1:30 4) 1:40

Answers

The scale factor used to create a model of an animal from the actual animal depends on the size and details required for the model. However, among the options provided, the most commonly used scale factor for creating detailed animal models is 1:40.

Describe and explain how petrol is separated from the mixture of hydrocarbons in crude oil?

Answers

It's an exciting and interesting process but those 5 points aren't worth a decent answer. The whole process is called fractioned distillation where different temperatures are reached, transforming the crude oil in gas. After being hit by a cold source it colds becoming different hydrocarbons depending on the temperatures.

One way to slow down global climate change is toА
use less nonrenewable resources.
B
use more nonrenewable resources.
с
drive cars that only burn fossil fuels.
D
use less dangerous ways to find oil.

Answers

One way to slow down the global climate change is to reduce the use of nonrenewable sources such as fossil fuels because, they release harmful gases that leads to global warming.

What is global warming?

The increase in the overall atmospheric temperature is called global warming. Global warming is mainly caused by green house gases such as carbon dioxide, methane, oxides of nitrogen etc.

Green house gases intensely absorbs heat energy that radiates out from earth. Thus they trap the temperature in the atmosphere make the planet warmer.

Nonrenewable energy sources such as nuclear reactions, fossil fuels, coal etc. coal and petroleum are highly rich in toxic gases and burning them releases these gases including carbon dioxide and methane to the atmosphere increase the rate of global warming.

Therefore, reducing the use of nonrenewable resources is a good way to slow down the global climate change.

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A
Because it will slow down global climate change

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