How are the boiling point and freezing point of a solvent affected when a solute is added?
Both the boiling point and the freezing point decrease.
Both the boiling point and the freezing point increase.
The boiling point increases, and the freezing point decreases.
The boiling point decreases, and the freezing point increases.

Answer:

a

Explanation:

Mixture is a combination of two or more elements and sodium is an element with a chemical symbol Na and a charge of +1 and chloride too is an element with a chemical symbol Cl and a charge of -1 so when these two elements are combine it form a chemical solution called Sodium chloride

Answer:c

Explanation: atoms make matter

Atoms are the basic building blocks of matter. The correct option is C.

Atoms are the basic unit and building block of matter. They are the smallest unit, but they can be divided. They do not emit charge on dividing into the further, the smallest parts.

Atoms are further divided into electrons, protons, and neutrons. They are the charged particles that revolve in the shell of the atom. A nucleus is also present in the between of the atom.

Atoms are considered the building blocks of matter, as all matter is made up of many atoms. The configuration of the atom defines the state of matter.

Thus, the correct option is C. The basic building blocks of matter.

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Answer:

Increased surface area - finely divided solute

like dissolves like - matching polarity

temperature - rate proportional to kinetic energy

stirring spreads - solute throughout solution

Answer:

In complete combustion, there is a sufficient supply of oxygen which is able to react with the burning hydrocarbon allowing the reaction products H2O and CO2 to be formed. In incomplete combustion there is a lack of oxygen so when heat is applied carbon monoxide is released.

I hope this will help you......

Answer:

Concentric circles

Explanation:

The energy levels are shown as concentric circles around the central nucleus, and the electrons are placed from the inside out. The first two electrons are found in the first energy level, and the third electron is found in the second energy level.

Answer:

pCH₄ = 0.540 atm

pC₂H₆ = 0.405 atm

pC₃H₈ = 0.505 atm

Explanation:

Step 1: Calculate the total number of gaseous moles

n = n(CH₄) + n(C₂H₆) + n(C₃H₈)

n = 0.320 mol + 0.240 mol + 0.300 mol = 0.860 mol

Step 2: Calculate the partial pressure of each gas

We will use the following expression.

pi = P × Χi

where,

pCH₄ = 1.45 atm × 0.320 mol/0.860 mol = 0.540 atm

pC₂H₆ = 1.45 atm × 0.240 mol/0.860 mol = 0.405 atm

pC₃H₈ = 1.45 atm × 0.300 mol/0.860 mol = 0.505 atm

What is a polyatomic compound?

➡A polyatomic ion is an ion that contains more than one atom. This differentiates polyatomic ions from monatomic ions, which contain only one atom.

Answer:

Which of the following pairs lists a substance that can neutralize Ca(OH)2 and the salt that would be produced from the reaction?

HCl and CaCl2

HClO and CaHClO

H2O and Ca(OH)3

H3PO4 and Ca(PO3)2

Explanation:

The given substance is Ca(OH)2 which is a base.

To neutralise a base an acid is required.

Among the given options,

HCl and H3PO4 are the acids.

The salts foremd when calcium hydroxide reacts with the respective acids are CaCl2 and Ca3(PO4)2.

But among the given options, only the forst option that is

HCl and CaCl2 shows the correct formulas.

Hence, the answer is first option.

Answer:

HCl and CaCl2

Explanation:

Answer:

-Reversal of the resting potential due to influx of sodium ions

-Mechanism that restores the resting membrane voltage and intracellular ionic concentrations

-Period during which potassium ions are diffusing out of the neuron because of a change in membrane permeability

-A brief reversal of membrane potential that travels along the axon

Explanation:

An action potential is a situation where the membrane potential is briefly reversed from -70mV to +30 mV

There are three steps of the moving action potential, including;

1) The depolarization step, where the membrane resting potential is reversed by the rush of sodium ions into a neuron

2) The repolarization, due to the closing of the voltage-gated sodium channels and the opening of the potassium channels, which is a mechanism that restores the membrane's resting voltage and the ionic concentration in the cell

3) Hyperpolarization, where due to some open potassium channels, there is an increased potassium permeability, and excessive efflux of potassium ions take place, which results in a dip in the membrane potential

4) The above three phases describe the phase of the action potential which is the brief reversal of membrane potential that travels along the axon

I don't know

I don't know

I don't know

I don't know

Answer:

Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

hope it helps

Sulfur dioxide and nitrogen oxides can contribute to acid precipitation.

A pollutant is a chemical or biological substance which harms water, air, or land quality.

Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

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Answer:

TRUE

Explanation: because it is positively charged and protons are positive ions

Answer:

Organ System

Explanation:

These organs are helping each other process food and therefore be an Organ System

Answer:

[tex]\boxed {\boxed {\sf 55.76756 \ amu}}[/tex]

Explanation:

The average atomic mass is the sum of the product of the given masses and their abundances. We have to complete two steps for each isotope, then add all the products together.

Fe-54

Convert the percent abundance to a decimal by dividing by 100.

Multiply the abundance as a decimal by the mass number. This is the number after the element in the isotope symbol (54 amu).

Fe-56

Convert the percent to a decimal.

Multiply the decimal by the mass number (56 amu).

Fe-58

Convert the percent to a decimal.

Multiply by the mass number (58 amu).

Average Atomic Mass

Add all the products together to find the average atomic mass.

The average atomic mass given the percent abundance is 55.7656 atomic mass units.

The required temperature of the gas sample is -64.96 °C.

Ideal gas equation gives idea about the behavior of gas at different condition & represented as:

PV = nRT.

From the above equation it is clear that relation between temperature and pressure for this question is:

P₁/T₁ = P₂/T₂, where

P₁ & T₁ are the initial pressure and temperature.

P₂ & T₂ are the final pressure and temperature.

On putting values, we get

T₂ = (145)(-25) / (55.8) = -64.96 °C

Hence required temperature of the sample is -64.96 °C.

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Answer:

B

Explanation:

4.8×10^-4

10^-4 = 0.0001

4.8×0.0001 = 0.00048

Answer:

ns - time

12g/ml - density

1.8pm - length

250m2 - area

325K - temperature

5.4mL - volume

90kg - mass

Explanation:

The unit of measurement is used to identify what a measurement is. It is very important to place a specific unit for each measurement made as it distinguishes them from one another. In this question, various measurements were given, which can be identified using their units.

- ns is measurement for time because seconds (s) is its unit

- 12g/ml is measurement for density because grams/milliliters (g/mL) is its unit

- 1.8pm is measurement for length because length can be measured in picometer (pm).

- 250m2 is measurement for area because metre² (m²) is its unit.

- 325K is measurement for temperature because Kelvin is the absolute unit for temperature.

- 5.4mL is measurement for volume because volume can be measured in milliliters (ml).

- 90kg is measurement for Mass because kilograms (s) is its unit.

19. place moth balls in the closet and observe after several days.

20. whenever wax or a candle burns it turns from solid to liquid but again at room temperature it turns to solid

21. evaporation, condensation, precipitation

22. it produces new substances

23. vinegar Bubbles when baking soda is added

24. steam

La respuesta correcta para esta pregunta abierta es la siguiente.

Desafortunadamente, no anexas opciones o incisos para contestar la pregunta.

Sin embargo, podemos comentar lo siguiente.

¿A qué se llama Recursos químicos en Química Industrial? ¿Cómo logran convertirse en bienes de consumo para la sociedad?

Hablando de Química Industrial, los recursos químicos son todos aquellos recursos que se utilizan para la extracción, procesamiento, y fabricación de los recursos naturales y materias primas para la elaboración de productos que posteriormente serán utilizados por otras industrias para ofrecerlas y venderlas como productos para el consumo masivo de las personas.

Este procesamiento de substancias para transformarlas en productos de consumo en general va encaminado a beneficiar a diferentes sectores como la medicina, los endulzantes, los fertilizantes, los saborizantes, los insecticidas, los plaguicidas, colorantes, y todo tipo de sustancia que pueda ser industrializada para su consumo final.

Answer:

Physics is the branch of science that deals with the structure of matter and how the fundamental constituents of the universe interact. It studies objects ranging from the very small using quantum mechanics to the entire universe using general relativity.

Answer: Covalent bonding is when atoms of different elements  share electrons

Explanation: Taking Methane CH₄

There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, sharing of electron is the only basis for the formation of covalent bond in methane.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

Carbon has an electrical configuration of 2,4. Hydrogen only has one electron in its valence shell, whereas carbon contains four electrons. In order to create methane, carbon forms a covalent connection with four hydrogen atoms, sharing its four electrons with them.

Therefore, sharing of electron is the only basis for the formation of covalent bond in methane.

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Answer:

1 gramo de metano aporta 50.125 kilojoules.

1 gramo de metano aporta 48.246 kilojoules.

Explanation:

La cantidad de energía liberada por la combustión de una unidad de masa del hidrocarburo ([tex]Q[/tex]), en kilojoules por mol, es igual a la cantidad de energía liberada por mol de compuesto ([tex]\bar {Q}[/tex]), en kilojoules por mol, dividido por su masa molar ([tex]M[/tex]), en gramos por mol:

[tex]Q = \frac{\bar Q}{M}[/tex] (1)

A continuación, analizamos cada caso:

Metano

[tex]Q = \frac{802\,\frac{kJ}{mol} }{16\,\frac{g}{mol} }[/tex]

[tex]Q = 50.125\,\frac{kJ}{g}[/tex]

1 gramo de metano aporta 50.125 kilojoules.

Octano

[tex]Q = \frac{5500\,\frac{kJ}{mol} }{114\,\frac{g}{mol} }[/tex]

[tex]Q = 48.246\,\frac{kJ}{mol}[/tex]

1 gramo de metano aporta 48.246 kilojoules.

Answer; a) Covalent compound are formed when atoms of different molecules share electrons in order to be stable either by losing or gaining electrons

eg.. HCL hydrogen chloride , a chlorine atom has 7 electrons on its outer shell and hydrogen has 1 so when this two pair they become covalently bonded. chlorine shares one electron with the hydrogen atom ,thus to say both now have a stable arrangement of electron in their outer shell.

methane CH4 the carbon atom has 4 electrons and hydrogen has 1 so carbon would need 4 more and hydrogen would need 1 more so carbon pairs with 4 hydrogen atoms making it 8 and hydrogen 2 so they now have a stable arrangement ,thus the carbon atom shares with 4 hydrogen atoms.

b) some physical properties are

i)they have low melting and boiling points

ii)their insolubility in water

iii) they are non conductors of electricity

c) an experiment using their melting and boiling point

EXPERIMENT; lets use the covalent molecule carbon monoxide CO

when you apply heat and it tend to melt at a -199 degree celsius then it is a covalent molecule

and when it starts to boil at -191 degree celsuis then its sure a carbon monoxide covalent molecule

explanation; the reason for its low melting point and boiling point is because the attraction between the molecule is very low so it doesn't need much energy to break up the lattice between them.

HOPE THIS HELP if you need more explanation feel free to comment in the comment section

Answer:

Salts that produce acidic solutions are acid salts. Neutral salts are those salts that are neither acidic nor basic. Zwitterions contain an anionic and a cationic centre in the same molecule, but are not considered to be salts. Examples of zwitterions include amino acids, many metabolites, peptides, and proteins.

Explanation:

Answer:

C) K

Explanation:

K has an electron configuration of 2.8.8.1

Answer:

-Being in the service of quality, safety, designing and problem solving.

-It plays an importnat part in our lives too, to measure any surface, object, etc.

Explanation:

Measurement is perhaps one of the most fundamental concepts in science. Without the ability to measure, it would be difficult for scientists to conduct experiments or form theories.

Answer:

The mass of H2SO4 collected is 92.0g assuming the theoretical yield of H2SO4 is 100g

Explanation:

Assuming the theoretical yield of the sulfuric acid, H2SO4, is 100g.

To solve this question we must use the equation of percent yield:

Percent yield = Actual yield / Theoretical yield * 100

Where percent yield = 92.0%, actual yield is the mass of H2SO4 produced and theoretical yield is 100g, the mass we are assuming

Replacing:

92.0% = Actual yield / 100g * 100

92.0g = Actual Yield

Answer:

organic

Explanation:

Organic substances are those which contains covalently linked carbon to hydrogen (C-H) bonds in their structure. In other words, organic compounds or substances are uniquely composed of carbon and hydrogen atoms covalently linked together.

These substances usually contain a long chain of these bonds, hence, making them complex. Therefore, according to this question, substanves that are complex molecules and contain carbon atoms bonded to hydrogen atoms are referred to as ORGANIC SUBSTANCES.

Answer:

A. Organic

Explanation:

Answer:

oh no!! I can't do this ;(

Explanation:

oopsie "BrO" I can't do this pleaseee.

don't be selfish next time and maybe people will help you...

Answer:

Following are the response to the given question:

Explanation:

In the given question the automatic exposure is used as the management which is offered in two distinct methods: photodiode as well as the parallel ionizing tank. In both are positioned as the absolute pressure type is between the patient as well as the receptor, behind the image receptor the photoelectric is placed.