what is the temperature of 0.30 moles of gas at pressure 800 kpa confined to a volume of 0.40 l?

The new volume of the balloon is V2 = 180 atm. The ideal gas law can be used to calculate the volume of a gas if the pressure, temperature, and number of moles are known.

This equation is PV=nRT, where P is the pressure, V is the volume, n is the number of moles, R is the universal gas constant, and T is the temperature. In this case, the initial pressure is 1.0 atm, the temperature is 25° C, and the number of moles is unknown. However, the initial volume is known, so the equation can be rearranged to solve for n:

V1P1=nRT

n=V1P1/RT

n=(240 atm1.0 atm)/(8.314 J/(molK)*298 K)

n=7.7 moles

The new volume of the balloon can then be calculated using the ideal gas law:

P1V1=P2V2

1.0 atm * 240 atm = 0.75 atm * V2

V2 = 180 atm

Learn more about  volume of the balloon:

https://brainly.com/question/28601285

#SPJ4

Answer:

Independent: whether or not there was fertilizer in water

Dependent: height of plants

Explanation:

In an experiment, there is an independent and a dependent variable. The independent variable is what is changed in the experiment. The dependent variable is what is measured.

In this experiment, 10 tomato plants are given fertilizer in the water, while 10 other tomato plants are given regular water. Everything else is kept constant, and the heights are measured at the end of the week.

The independent variable is what is being changed. In this experiment, the only thing being manipulated is the fertilizer. One group of the plants is given fertilizer, while the other is not. Therefore, the independent variable is whether or not there was fertilizer in the water.

The dependent variable is what is being measured. In this experiment, the thing that is being measured is the height of the plants. Therefore, the dependent variable is the height of the plants.

Answer:

High melting point.

Explanation:

An example of a high melting point would be: 4215 K (3942 °C, 7128 °F).

Answer:

High melting point.

Explanation:

: PM2.5 is defined as the mass concentration of particles in the air less than or equal to 2.5 micrometers in diameter.Question 15: False, carbon dioxide (CO2) is not considered a criteria air pollutant.

Question 16: The closest answer is 50%, but the exact percentage is not provided in the question.Question 17: The term "photochemical smog" is most synonymous with ozone (O3), which is a criteria air pollutant.Question 18: True, attainment of ambient air quality standards requires that measured concentrations at all monitoring stations within an air district are below ambient air standards.

Question 14 asks about the definition of PM2.5. PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 micrometers. It represents the mass concentration of particles suspended in the air, which are small enough to be inhaled into the respiratory system and can have adverse health effects.

Question 15 states whether carbon dioxide (CO2) is a criteria air pollutant. Criteria air pollutants are a set of pollutants regulated by environmental agencies due to their detrimental impact on air quality and human health. However, carbon dioxide is not considered a criteria air pollutant because it does not directly cause harm to human health or the environment in the same way as pollutants like ozone or particulate matter.

Question 16 asks about the percentage of carbon monoxide (CO) emissions from mobile sources in Santa Clara County. While the exact percentage is not provided in the question, the closest answer option is 50%. However, it is important to note that the precise percentage may vary depending on specific local conditions and emissions sources.

Question 17 inquires about the criteria air pollutant most synonymous with the term "photochemical smog." Photochemical smog is primarily associated with high levels of ground-level ozone (O3). Ozone is formed when nitrogen oxides (NOx) and volatile organic compounds (VOCs) react in the presence of sunlight, creating a hazy and polluted atmospheric condition.

Question 18 addresses the concept of "attainment" of ambient air quality standards. To achieve attainment, measured concentrations of pollutants at all monitoring stations within an air district must be below the established ambient air quality standards. This ensures that the air quality in the given area meets the required standards for protecting human health and the environment.

Learn more about mass concentration  here:- brainly.com/question/23437000

#SPJ11

One mole of H₂S gas contains 6.022 × 10²³ H₂S molecules. Hence, 2.50 mol of H₂S contains 1.50 × 10²⁴ molecules. Thus, option A is correct.

Any substance containing 6.022 × 10²³ number of atoms is called one mole of that substance. This number is called Avogadro number. Thus, one mole every elements contains Avogadro number of atoms.

Similarly a compound is made of molecules. One mole of a compound contains 6.022 × 10²³ number of molecules. The mass of a compound with Avogadro number of molecules is called its molar mass.

As any other compound, one mole of H₂S contains 6.022 × 10²³ molecules. Therefore, the number of molecules in 2.50 moles of H₂S is :

2.50 moles × 6.022 × 10²³ molecules/mol =  1.50 × 10²⁴molecules

Hence, the number of molecules present in 2.50 moles of H₂S is  1.50 × 10²⁴.

To find more on Avogadro number, refer here:

https://brainly.com/question/11907018

#SPJ6

The statement "molecules move in random directions when heated in a heat engine, and because of the lack of uniformity in the direction of molecular movement" is true.

When a heat engine is heated, molecules absorb heat energy and their kinetic energy increases. The kinetic energy of molecules causes them to move around. However, this movement is not uniform, and the molecules move in random directions.

A heat engine is a device that converts thermal energy into mechanical energy. Heat engines operate on the principle of thermodynamics.

They work by taking in thermal energy from a high-temperature reservoir, converting some of it into mechanical energy, and then releasing the remaining thermal energy to a low-temperature reservoir.The internal combustion engine in a car, the steam engine in an old locomotive, and the turbine in a power plant are all examples of heat engines. They all convert heat energy into mechanical energy to perform work.

To learn more about engine visit;

https://brainly.com/question/31140236

#SPJ11

Answer:

The molecular formula of the compound with an empirical formula of CH2 and a molar mass of 28 would be C2H4.

The reaction is an oxidation-reduction reaction because here Sodium is oxidized from Na to Na⁺ while hydrogen is reduced from H⁺ to H₂⁰.

The reaction below: 3Na(s) + 3H₂O(l)= 3NaOH(aq) + H₂(g)

1. The reaction is an oxidation-reduction reaction because here Sodium is oxidized from Na to Na⁺ while hydrogen is reduced from H⁺ to H₂⁰.

2.  The substances oxidized are Na and reduced. is H⁺.

3. The reducing agent is Na and the oxidizing agent is H₂O.

4.  half ionic equation for the oxidation

  Na => Na⁺ + e⁻

The half ionic equation for the reduction equation.

H₂O + e⁻ => H₂

An oxidation-reduction reaction is any chemical response in which the oxidation number of a molecule, atom, or ion changes by way of gaining or losing an electron. Redox reactions are common and crucial to some of the basic features of lifestyles, such as photosynthesis, respiration, combustion, and corrosion or rusting.

Oxidation is a chemical procedure. it is defined as a method that occurs whilst atoms or agencies of atoms lose electrons. some other manner to define oxidation is when a chemical species gains oxygen or loses hydrogen. whilst these activities occur, oxidation takes area.

Learn more about the oxidation-reduction reactions here:-https://brainly.com/question/17136827

#SPJ9

It is important to consider shedding when assessing the potential risks associated with biohazard experiments involving research animals, and to take appropriate precautions to minimize the risk of exposure to these hazards.True.

Shedding of biohazards from research animals is an important factor to consider when evaluating the risk of conducting experiments involving these animals.

Biohazards are infectious agents or biological materials that can pose a threat to human health, animal health, or the environment. The risk of exposure to biohazards can be influenced by a variety of factors, including the route of transmission and the amount of the infectious agent or biological material present.

Shedding refers to the release of infectious agents or biological materials from animals into the environment, which can increase the risk of exposure to these hazards.

For such more questions on Biohazards:

https://brainly.com/question/16170111

#SPJ11

The states of matter change to produce the same or the new substance. When yeast is added to hydrogen peroxide bubble of carbon dioxide is formed which indicates chemical change.

A chemical change is the formation of a new substance by the chemical alterations in the reactants. The yeast releases products of cellular respiration that react with hydrogen peroxide.

The reaction is exothermic as it releases heat and increases the temperature when measured by the thermometer. The Fizzing and bubbling occur when carbon dioxide reacts with H₂O₂ to produce a new substance.

Therefore, addition of yeast to hydrogen peroxide is a chemical change.

Learn more about chemical change here:

https://brainly.com/question/27935965

#SPJ1

Answer:

The type of change that took place is most likely a chemical change, due to the recordable reactivity of the hydrogen peroxide to the yeast granules in the experiment.

Explanation:

As stated in the question, the hydrogen peroxide started fizzing and bubbling in reaction to the yeast granules, which is already a sign of a chemical change. The question also states that there was an increase in temperature. This is another sign of a chemical change. Hope this helped (;

Answer: It’s C for me: To synthesis new DNA

Explanation:

Brainly please

Answer:

Right if you think it is.

Answer:

they are not lustrous

hope it helps

Answer:

A. Reduced precipitation is the cause of drought.

Explanation:

Reduced precipitation begins to insufficient water availability because water catch basins or tanks tend to dry out. When it drains out, people tend to start working and drying out the backup water sources and stored ones. Until such time, that the reservoirs of water will completely be dried out. And there will be no more water for them to use and there will be a drought.

hope this helps

Answer:

Option A

Explanation:

Answer:

Nervous system

Explanation:

We like to think of the nucleus as the "control center of the cell." The nucleus controls the cell's DNA, protein synthesis, cell division, storage of genetic material, and protein transcription. Basically, it acts as the cell's brain by telling it what to do, how to grow, and when to reproduce. This is similar to our brain, part of the nervous system.

Answer:

? I am confused. What is the question?

Explanation:

If the liquid X has a higher vapor pressure than to the liquid Z. So the sample of Liquid ‘Z’ will have higher boiling point.

Vapor pressure: Vapor pressure is a measure of the tendency of material to change into the gaseous or the vapor state, and it increases with temperature. The temperature at which the vapor pressure at the surface of a liquid will becomes equal to the pressure exerted by the surroundings is called as the boiling point of the liquid.

Boiling point: boiling point is the temperature in which the vapor pressure of a liquid will becomes equal to the atmospheric pressure.

Now, if the vapor pressure of a liquid will be high, it means intermolecular force between the molecules are small. The little amount of heat energy will be enough to separate the molecules, so the boiling point will be low.

Here liquid X has higher vapor pressure than to the liquid Z so, liquid Z will have higher boiling point.

To know more about vapor pressure here

https://brainly.com/question/11864750

#SPJ4

The IUPAC name of a compound  \(c_7h_{14}c_{l2 }\) is 1,7-dichloroheptane.

Skeletal formula, which is the accepted notation for organic compounds, is another name for the 2D chemical structure illustration of 1,7-dichloroheptane. In the 1,7-Dichloroheptane chemical structure, the carbon atoms are implied to be at the corner(s) and hydrogen atoms coupled to carbon atoms are not mentioned; instead, it is assumed that each carbon atom is connected to enough hydrogen atoms to form four bonds.

Based on the ball-and-stick model, which shows both the three-dimensional positions of the atoms and the bonds tying them together, the 3D chemical structure image of 1,7-Dichloroheptane was created. In order to provide a clearer picture of the atoms and bonds throughout the chemical structure model of 1,7-Dichloroheptane, the radius of the spheres is therefore smaller than the rod lengths.

To learn more about IUPAC name

https://brainly.com/question/27888104

#SPJ4

Answer:

Explanation:

A compound that can act both as an acid and a base is called an amphoteric substance. A good example (based on the question) of an amphoteric substance is the Aluminium hydroxide [Al(OH)₃] where Aluminium is the "M" in M-O-H. Aluminium is in the third period of the periodic table. The reaction below shows aluminium can act both as an acid and as a base in different neutralization reactions.

As an acid

Al(OH)₃ + 3NaOH ⇒ Na₃AlO₃ + 3H₂O

As a base

3HCl + Al(OH)₃ ⇒ AlCl₃ + 3H₂O

NOTE: A neutralization reaction is a reaction between an acid and a base to give you salt and water

Unlike protons and neutrons, which are housed inside the atom's nucleus at its center, electrons are found outside the atom.

An atom can have a label in addition to a symbol or atomic number. The label is formatted as "(text)" (without the quotation marks), which means "text, closed curved bracket, open curved bracket." If an isotopic mass is present, it should come after the chemical symbol, followed by the label.

The element is represented by the letter(s) in the centre. The atomic number, which indicates the quantity of protons, is the number in the bottom left corner.

To know more about electrons protons visit:-

https://brainly.com/question/29248303

#SPJ1

The limiting reagent here is the Hydrogen gas

Limiting reagents are substances that are completely used up or consumed  in a chemical reaction, they are also referred to as limiting reactants as well. According to stoichiometry of chemical reactions a fixed amount are reactants are supposed to react with each other in order to complete the chemical reaction, and if some reagent is less in amount for the reaction then it is considered as limiting reagents.

In the above given reaction we can see that 3 moles of Hydrogen gas are required to react with one mole of 1 mole of Nitrogen gas to form 2 moles of Ammonia. But if in case in the reaction only 2 moles of Hydrogen are available with 1 mole of Nitrogen.

In that case we cannot use the whole quantity of Nitrogen, because the whole amount of Nitrogen requires 3 moles of Hydrogen and we have just 2 mole.

Hence we can say that the Hydrogen gas is limiting the reaction and therefore it is called as the limiting reagent

To know more about Limiting reagent

https://brainly.com/question/19654705

#SPJ1

The ordering of the fields of study of biological science from the  outermost level to the core is as follows:

Science is the body of knowledge which aims to understand and explain the natural world through observations and experiments.

The four branches of science are:

Comparing biological science to an onion with many layers, the ordering  outermost level to the core is as follows:

In conclusion, the levels of organization of science follows a systematic approach.

Learn more about science at: https://brainly.com/question/14054972

#SPJ1

Photosystem pigments that function in gathering and passing light to reaction-center molecules are called antenna pigments.

These pigments are located in the antenna complex of photosystems I and II and are responsible for absorbing light energy and transferring it to the reaction center chlorophyll molecules.

Antenna pigments are diverse and include chlorophylls, carotenoids, and phycobilins, each of which absorbs light at different wavelengths.

The absorbed light energy is then funneled through a series of pigment molecules until it reaches the reaction center, where it is converted into chemical energy through a process known as photosynthesis.

The efficiency of photosynthesis is dependent on the quantity and types of antenna pigments present in the photosystems, as well as their arrangement and orientation within the antenna complex.

To know more about Photosystem. please visit.....

brainly.com/question/29376232

#SPJ11

8-hydroxyquinoline and ortho-cresolphthalein complexone (cpc) reagent is commonly used in the determination of Calcium element.

The biological features of the 8-hydroxyquinoline derivatives include antibiotic, antifungal, antitumor, and anticancer effects.

8-Hydroxyquinoline gives the phenol:chloroform it is added to a bright yellow colour, making it easier for the researcher to distinguish between the organic and aqueous phases during the nucleic acid purification procedure.

O-cresolphthalein complexone (CPC) and calcium combine to generate a purple complex in an alkaline solution. 8-hydroxyquinoline is used to reduce interference with magnesium ions. The calcium content of the sample is directly inversely proportional to the complex's colour intensity, which is assessed.

To learn about reagent

https://brainly.com/question/10378608

#SPJ4

Answer:

Explanation:

Alexander Fleming's hypothesis was that the juice that was produced by the mold that appeared in the petri dishes was killing the bacteria growing there (streptococcus, meningococcus and the diphtheria bacillus).

Answer:

He thought the mold had released a chemical that prevented the bacteria’s growth.

Explanation:

Gradpoint

Answer:

Observations of the sky allowed explorers to mark the passage of time both in hours and through the months of the year. Early astronomers also realized that the night sky does not look the same from different places on the Earth.

Answer:

Lithium, sodium, potassium, rubidium, and cesium are all part of a group called the alkali metals. ... They are all soft metals in elemental form and they all react violently with water. They react so strongly because they all readily lose an electron to form the +1 cation very easily.

Answer:

17

Explanation:

mass number = # of protons + # of neutrons