if 1.24 l of a gas is at standard temperature and pressure is compressed to 451 ml, what is the new pressure of the gas in atm (hint, temperature stays the same)?

The combustion reaction is the process by which a chemical substance or hydrocarbon reacts with oxygen to produce carbon dioxide and water while also releasing energy in the form of light and heat.

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The statement about chemical reaction is true is :

B) The reaction rate can increase.

A) The rates are always constant is not true. for a chemical reaction, the rate of chemical reaction does not remains constant because rate depends on the concentration of reactants.

B) The rate of reaction can increase is true . for a chemical reaction , the rate of reaction can be increase by increasing the concentration of reactant.

C) The rate of reaction cannot change is not true.

D) The rate of reaction cannot decreases is not true . reaction rates

decreases with time .

Thus, The statement about chemical reaction is true is :

B) The reaction rate can increase.

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Answer:

Air, is a mixture of atoms and molecules, while the space between said atoms, and molecules can expand and contract depending on the temperature.

We can see here that the maximum concentration C of the pollutant at a point which is at a distance x from the plant is: C = A / (√(2 × π) × x).

A pollutant is a substance or agent introduced into the environment that has harmful or negative effects on living organisms, ecosystems, or the natural environment.

If we use a value of A = 0.05 and integer values of x ranging from 1 to 100, we get the following table of values for C:

x | C

---|---

1 | 0.019947114020071637

10 | 0.001994711402007164

20 | 0.000997355701003582

30 | 0.0006649038006690545

40 | 0.000498677850501791

50 | 0.0003989422804014327

60 | 0.00033245190033452725

70 | 0.00028495877171530915

80 | 0.0002493389252508955

90 | 0.0002216346002230182

100 | 0.00019947114020071635

As you can see, as x increases, C decreases. This is because the pollutant is spread out over a larger area as x increases. Therefore, the concentration of the pollutant at any given point decreases as x increases.

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The complete question is:

A chemical plant releases an amount A of a pollutant into a stream. The maximum concentration C of the pollutant at a point which is at a distance x from the plant is:

Use a value of A = 0.05 and integer values of x ranging of 1, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100.

In your comments describe what happens to C as x increases?

Answer:

Water-> Brine-> Kerosene

Explanation:

Answer:

Brine, water, kerosine

Explanation:

Brine is the densest.

Kerosine Is less dense than water.

Answer: 471944999999999967232

Explanation:

(1.945)(1000000000000000000)+4.7(1020)

=1945000000000000000+4.7(1020)

=1945000000000000000+(4.7)(100000000000000000000)

=1945000000000000000+470000000000000000000

=471944999999999967232

Answer:

4.5 moles

Explanation:

One mole is equal to 6.022 x 10^23 atoms

2.71 x 10^24 atoms * 1 mol/ 6.022 x 10^23 atoms = 4.5 moles

We require these compounds to migrate up the plate in order to provide a better separation of them. We will need to make the eluting solvent more polar in order to do this. Ethyl acetate could be substituted with a more polar solvent, such as acetone, as a possible remedy.

Non-volatile mixtures can be separated using the chromatography technique known as thin-layer chromatography (TLC).

A sheet of an inert substrate, such as glass, plastic, or aluminum foil, is used for thin-layer chromatography. This substrate is coated with a thin layer of an adsorbent material, typically silica gel, aluminum oxide (alumina), or cellulose. The stationary phase refers to this adsorbent layer. A solvent or solvent combination (referred to as the mobile phase) is dragged up the plate by capillary action after the sample has been placed on the plate. Separation is accomplished because various analytes ascend the TLC plate at various speeds.

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Answer:

the emission of visible light by a body, caused by its high temperature.Compare luminescence.

the light produced by such an emission.

the quality of being incandescent.

The resulting pH after adding the HNO\(_{3}\) solution is around the same as the pKa of HF, which is 3.17. Option D is the answer.

To determine the resulting pH after adding 15 mL of a 0.1 M HNO\(_{3}\) solution to 200.0 mL of a buffer made of 0.25 M HF and 0.25 M NaF, we need to consider the buffer's capacity to resist changes in pH.

The buffer consists of a weak acid (HF) and its conjugate base (F-). When an acid (HNO\(_{3}\)) is added, it reacts with the base (F-) in the buffer to form the conjugate acid (HF) and the nitrate ion (NO\(_{3}\)-).

Since the initial concentrations of HF and F- are equal (0.25 M), the buffer is at its optimal pH, which is approximately equal to the pKa of HF (3.17).

Adding the HNO\(_{3}\) solution increases the concentration of the conjugate acid (HF) and decreases the concentration of the base (F-). However, since the concentrations of HF and F- are still equal, the pH remains close to the pKa.

Therefore, the resulting pH after adding the HNO\(_{3}\) solution is approximately equal to the pKa of HF, which is 3.17.

Option D, 3.17, is the answer.

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Answer:

It would be B but gravity is not a fact it is a theory

Elodea leaf was the subject of a test by Ms. Sanchez. Using a light source and oxygen gas, she conducted an experiment in which she counted the number of bubbles emitted by an elodea leaf.

Elodea plants transfer the created oxygen from leaves to stem during photosynthesis. A small amount of oxygen escapes from the leaves to generate oxygen bubbles in the water, but the majority of oxygen leaves the stem because the intracellular air spaces in the stem are greater.

The oxygen that surges up from an underwater plant's leaves. Plants create food and oxygen from carbon dioxide and water through a process known as photosynthesis.

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Answer:

Elementos.

Explicación:

Los elementos son las sustancias puras que están formadas por el mismo tipo de átomos, es homogéneo y no se puede descomponer por medios químicos. El elemento tiene el mismo tipo de átomos que son similares en tamaño y forma. Es un tipo de materia pura que tiene solo un tipo de átomos y no se puede descomponer más porque no está hecha de dos sustancias, es solo una sustancia, por eso no se puede descomponer por medios químicos.

Answer:

Ionization energy increases as you go across a period, and increases as you move up a group. So, elements with the smallest ionization energy would be at the bottom left corner of the periodic table. Examples of elements with small ionization energy: Francium (Fr), Cesium (Cs), Radium (Ra).

Answer: False

Explanation: Gaining an electron which has a negative charge results in an overall negative charge, thus making this an anion, and the answer, false.

Answer:false

Explanation:it becomes a anion

The specific heat of silver can be calculated by using the specific heat interactive and determining the mass of water, mass of silver, and the temperature change of the water.

To calculate the specific heat of silver, we need to follow a three-step process:

Step 1: Determine the mass of water and the mass of silver.

In order to calculate specific heat, we need to know the mass of the substances involved. Measure the mass of the water and the mass of the silver separately. This can be done using a scale or balance.

Step 2: Determine the temperature change of the water.

In this step, we need to measure the initial temperature and final temperature of the water. The temperature change can be calculated by subtracting the initial temperature from the final temperature. Make sure to use the same unit of temperature throughout the calculation.

Step 3: Use the specific heat interactive to calculate the specific heat of silver.

Once we have the mass of water, mass of silver, and the temperature change of the water, we can use the specific heat interactive to calculate the specific heat of silver. The specific heat interactive provides a formula that incorporates these values and allows us to determine the specific heat of silver.

By plugging in the known values into the specific heat formula, we can obtain the specific heat of silver. Remember to double-check your calculations and units to ensure accuracy.

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Answer:

77%

Explanation:

percent yield is the actual yield divided by the theoretical (predicted) yield, then multiplied by 100 to get a percentage.

34/44 = 0.77

0.77 x 100 = 77%

Because 1 mole of any gas occupies the same volume as 1 mole of any other gas at the same temperature and pressure, the statement is untrue.

Equal volumes of gases at the same temperature and pressure contain the same number of molecules, according to Avogadro's law.

Helium has a molar mass of 4 grams per mole, whereas oxygen has a molar mass of 32 grams per mole. Therefore, 1 mole of helium weighs 4 grams, compared to 32 grams for 1 mole of oxygen. Avogadro's law states that the volume of a mole of oxygen is equal to the volume of a mole of helium.

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Answer:

C. an element

Explanation:

Elements are pure substances and made up of only one type of atoms which cannot be further broken down.

At the atomic level, the main factor that causes fudge topping to pour faster when heated is the increase in the average kinetic energy of its constituent particles.

When fudge topping is heated, the thermal energy is transferred to the molecules and atoms within the topping. As the temperature rises, the average kinetic energy of the particles increases. This increase in kinetic energy leads to greater molecular motion and faster molecular interactions within the fudge topping.

The increase in molecular motion and interactions results in a reduction in the viscosity of the fudge topping. Viscosity refers to the resistance of a substance to flow. As the temperature increases and the particles move more rapidly, the intermolecular forces holding the fudge topping together weaken, allowing it to flow more easily.

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Answer:

1/....

Explanation:

If we say acceleration 'a' is inversely proportional to mass 'm', then

a=1/m.

There are also 6 oxygen atoms in the products. This is because the products of the photosynthesis reaction include C6H12O6 (glucose) and 6O2 (oxygen gas). The glucose molecule contains 6 carbon, 12 hydrogen, and 6 oxygen atoms.

In the photosynthesis reaction, 6CO2 + 6H2O → C6H12O6 + 6O2, there are 18 oxygen atoms in the reactants.

Therefore, the total number of oxygen atoms in the products is 6. This is because oxygen gas is not bonded to anything else and is released into the atmosphere as a product of photosynthesis.

The reactants of photosynthesis, carbon dioxide (CO2) and water (H2O), are converted into glucose (C6H12O6) and oxygen (O2) gas. In this process, sunlight energy is converted into chemical energy that is stored in glucose, which is used by the plant for growth and other metabolic processes. Therefore, photosynthesis is a crucial process for life on earth.

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Answer:

Eas and NOAA is that system

Answer:

the equation is balanced because there are 8 atoms of carbon, 26 atoms of oxygen, and 20 atoms of hydrogen. on each side of the equation.

PLEASE MARK BRAINLIEST

Answer:

New growth of trees is an exception

Explanation:

when volcanoes erupt, they release hot magma that is destructive to the environment causing personal damage, lack of breathable air and death.

heat produce cannot in any way help in growth of trees

The average temperature is 17.0 °C.

The physical concept of temperature indicates in numerical form how hot or cold something is. A thermometer is used to determine temperature.

Thermometers are calibrated using a variety of temperature scales, which historically defined distinct reference points and thermometric substances. The most popular scales are the Celsius scale, sometimes known as centigrade, with the unit symbol °C, the Fahrenheit scale (°F), and the Kelvin scale (K), with the latter being mostly used for scientific purposes. One of the International System of Units' (SI) seven base units is the kelvin law of cosines.

The lowest point on the thermodynamic temperature scale is absolute zero, or zero kelvin, or 273.15 °C.

To find the average temperature, we add up the individual temperatures and divide by the total number of measurements. Let's calculate:

Average temperature = (16.9 + 17.0 + 17.1) / 3 = 51.0 / 3 = 17.0

Therefore, the average temperature is 17.0 °C.

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Answer:

please mark as brainliest!!

Explanation:

// C++ program to print initials of a name  

#include <bits/stdc++.h>  

using namespace std;  

void printInitials(const string& name)  

{  

   if (name.length() == 0)  

       return;  

   // Since touuper() returns int, we do typecasting  

   cout << (char)toupper(name[0]);  

   // Traverse rest of the string and print the  

   // characters after spaces.  

   for (int i = 1; i < name.length() - 1; i++)  

       if (name[i] == ' ')  

           cout << " " << (char)toupper(name[i + 1]);  

}  

// Driver code  

int main()  

{  

   string name = "prabhat kumar singh";  

   printInitials(name);  

   return 0;  

}

Answer:

#include<iostream>

using namespace std;

int main(){

char str[20];

int i=0;

std::cout<<"Enter a name:" ;

cin>>str;

cout<<*str;

while(str[i]!='\0'){

if(str[i]==' '){

i++;

cin>>*(str+i);

}

i++;

}

return 0;

}

The mass of 3.0 x 10²³ molecules of nitrogen gas is 13.95 g.

The mass of one mole of Nitrogen gas is 28 g/mol.

The number of atoms in one mole of Nitrogen gas is 6.022 x 10²³ molecules.

The mass of Nitrogen gas in the given number of molecules is calculated as follows;

6.022 x 10²³  --------------------- 28 g/mol

3.0 x 10²³ ----------------------------- ?

\(= \frac{3.0 \times 10^{23} \times 28}{6.022 \times 10^{23} } \\\\= 13.95 \ g\)

Thus, the mass of 3.0 x 10²³ molecules of nitrogen gas is 13.95 g.

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