can there be a negative number answer in a combined gas law problem

Answer:

Last one

Explanation:

You may can't imagine that there are singke celled organisms are much more than all animals.

There amount is in 500-700trillions so last option is wrong

Answer:

D

Explanation:

Answer:

M=3

B=25

Equation= 3x+25

Explanation:

M is your slope and if you follow the slope- intercept formula (y=m+b) you just need to plug in the numbers.

Thus your answer:

M=3

B=25

Equation= 3x+25

The reason we learn an algebraic method to balance chemical equations instead of using a trial-and-error method is because the algebraic method is more efficient and reliable.

Using trial and error can be time-consuming and may not always lead to the correct solution. Balancing chemical equations requires ensuring that the number of atoms of each element on both sides of the equation is equal. This can become complex when dealing with more complicated equations.

The algebraic method, on the other hand, provides a systematic approach that can be applied to any chemical equation, regardless of its complexity. By applying mathematical principles and using variables, we can determine the correct coefficients to balance the equation. This method is programmable, which means we can use computer algorithms to solve equations more quickly and accurately.

Additionally, the algebraic method allows us to analyze whether a reaction can actually be balanced. It helps us understand the stoichiometry of the reaction and determine the correct ratios of reactants and products.

Contrary to the belief that it is only meant to complicate things, learning this method is essential for a deeper understanding of chemistry and problem-solving skills. It enables us to apply logical thinking and mathematical concepts to chemical reactions, which is crucial in various scientific and industrial applications.

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One change in homes that could help save electrical energy is to replace all incandescent bulbs with LED bulbs.

There are different ways one can save electrical energy in their home. Some of them include:

LED bulbs are known as Light-Emitting Diode bulbs. They are energy-saving bulbs, although might be more expensive than their incandescent counterparts.

According to research, LED bulbs have the capacity to save up to 75% of energy compared to other bulbs. Thus, if anyone is looking to save electrical energy and they have incandescent bulbs at some lighting points, they will get very good results by replacing them with LED bulbs.

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Answer: One change in homes that could help save electrical energy is to replace all incandescent bulbs with LED bulbs. They are energy-saving bulbs, although might be more expensive than their incandescent counterparts.According to research, LED bulbs have the capacity to save up to 75% of energy compared to other bulbs. Thus, if anyone is looking to save electrical energy and they have incandescent bulbs at some lighting points, they will get very good results by replacing them with LED bulbs.Turning off all lights and electrical appliances when not in use. Reduction of electrical appliances. For tv, set brightness, contrast and enable power saving mode. These are two other ways to consume less energy in your home.

Explanation: I hope this helps

Question A. How does the composition of the atmosphere change from year to year? most likely would be studied by a chemist.

The work of a chemist professional is based on examining the composition of the different materials and compounds that form the subject of study such as in this case the composition of the atmosphere.

Therefore, with this data, we can see that the work of a chemist professional is based on deciphering the composition of the different compounds that form the natural world.

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Both sand and potting soil are mixtures because they both contains more than one type of substances. Both are composed of minerals and different substrates.

Mixtures are substance formed by the combination of two or more components. The mixtures can be homogenous or heterogenous. Homogenous mixtures contains only one phase.

Heterogenous mixtures are of components with different phases. Sand is an example of heterogenous mixture. The major component of sand is silicon dioxide. it also contains grains of other minerals.

Potting soil is a mix of soil and minerals used for plantation. It also known as potting compost since it contains wood products, vermiculates, clay etc. Therefore, potting soil is a mixture.

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The 4 principle, orbital, magnetic and spin quantum numbers of Thallium are:

Principal Quantum Number (n)

Orbital Quantum Number (l)

Magnetic Quantum Number (m)

Spin Quantum Number (s)

Valence electrοns are the electrοns that are present in the οutermοst shell οr energy level οf an atοm. These electrοns are invοlved in chemical bοnding and are respοnsible fοr the chemical prοperties οf an element. The number οf valence electrοns in an atοm determines its valency, which is the ability οf an atοm tο cοmbine with οther atοms tο fοrm cοmpοunds.

The fοur quantum numbers fοr Thallium can be determined frοm this electrοnic cοnfiguratiοn as fοllοws:

Principal Quantum Number (n):  This quantum number defines the energy level οr shell in which the electrοn is present. In the case οf Thallium, the valence electrοn is present in the fifth shell, therefοre the principal quantum number is 5.

Orbital Quantum Number (l):  This quantum number describes the subshell οr the type οf οrbital in which the electrοn is present. The values οf l depend οn the value οf n and range frοm 0 tο (n-1). In the case οf Thallium, the valence electrοn is present in the p subshell οf the fifth shell. Therefοre, the value οf l equates tο 1.

Magnetic Quantum Number (m): This quantum number describes the οrientatiοn οf the οrbital in three-dimensiοnal space. The values οf m range frοm -l tο +l. In the case οf Thallium, the p subshell has three οrbitals with m values οf -1, 0, and +1.

Spin Quantum Number (s): This quantum number describes the intrinsic angular mοmentum οr spin οf the electrοn. The value οf s is always ±½ fοr electrοns. Therefοre, the spin quantum number fοr the valence electrοn οf Thallium is ±½.

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The option that is not a known advantage of natural gas over other fossil fuels is: C. It is far more abundant than any other fossil fuel.

Natural gas has several advantages over other fossil fuels. Firstly, it burns more completely than other fossil fuels, which means it produces fewer pollutants and greenhouse gases.

This leads to the second advantage, as natural gas burns more cleanly than other fossil fuels, resulting in reduced emissions of pollutants such as sulfur dioxide, nitrogen oxides, and particulate matter.

However, when it comes to abundance, natural gas is not necessarily more abundant than other fossil fuels.

While natural gas reserves can be substantial, the availability and reserves of other fossil fuels like coal and oil are also significant. Therefore, option C is not a known advantage of natural gas over other fossil fuels.

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Answer:

You become negatively charged

The enthalpy of combustion of ethyl stearate (C₂₀H₄₀O₂) is -679.3 kJ/mol.

To calculate the enthalpy of combustion (ΔHc) of ethyl stearate (C₂₀H₄₀O₂), we need to use the following equation:

ΔHc = ΣΔHf(products) - ΣΔHf(reactants)

where ΔHf represents the standard enthalpy of formation of the compound.

The products of the combustion of ethyl stearate are carbon dioxide (CO₂) and water (H₂O), so we need to use their standard enthalpies of formation in the calculation:

CO₂(g) = -393.5 kJ/mol

H₂O(l) = -285.8 kJ/mol

The reactant, ethyl stearate (C₂₀H₄₀O₂), also has a standard enthalpy of formation provided:

C₂₀H₄₀O₂(l) = -984.6 kJ/mol

Now, we can plug in the values and solve for ΔHc:

ΔHc = [ΔHf(CO₂) + ΔHf(H₂O)] - ΔHf(C₂₀H₄₀O₂)

ΔHc = [(-393.5 kJ/mol) + (-285.8 kJ/mol)] - (-984.6 kJ/mol)

ΔHc = -679.3 kJ/mol

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Answer:

129.02 g/mol.

Explanation:

We apply grahams law of diffusion:

1/8 = √2.016/√m     where m = molar mass

√m  = 8√2.016

m =   (8√2.016) = 129.02 g/mol.

Answer:

See explanation below

Explanation:

You forgot to put the picture to do so. In this case, I manage to find one, and I hope is the one you are looking for. If not, then post it again and I'll gladly help you out again.

According to the picture with the answer, we have a cyclohexane with 4 methyl groups there. Two of them are facing towards the molecule with a darker bond. This means that the alkyl bromide, should have a bromine in one of the bonds, and in order to produce an E2 reaction, this bromine should be facing in the opposite direction of the methyl groups which are facing towards. This is because an E2 reaction occurs with the less steric hindrance in the molecule. If the bromine is in the same direction as the methyl group, it will cause a lot more of work to do a reaction, and therefore, an E2 reaction. I will promote instead a E1 or a sustitution product.

Therefore the alkyl bromide should be like the one in the picture 2.

This indicates that it took 360 s for the reaction to be 30% complete.  

The product of the reaction is tBuOH and HCl.  

               tBuCl → tBuOH + HCl

1 mole of tBuCl gives 1 mole of HCl. It means that the number of moles of HCl produced during the reaction depends upon the number of moles of tBuCl participating in the reaction. After the production of HCl titration is done with NaOH solution. After 360 seconds the solution changes color.  

         0.9 ml of 0.1 M NaOH = 0.9 × 0.1 = 0.09 mM NaOH

         0.09 mM NaOH reacts with 0.09 mM HCl

         0.09 mM tBuCl (reacted)

Initially, 0.3 mM tBuCl was present.  

         0.09 mM/0.3 × 100% = 30% tBuCl reacted.

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True, the natural pH of hair is between 4.5 and 5.5.

The pH scale measures the acidity or alkalinity of a substance, ranging from 0 (highly acidic) to 14 (highly alkaline), with 7 being neutral. Hair and the scalp have a slightly acidic natural pH level, typically falling within the range of 4.5 to 5.5. This acidity helps maintain the hair's integrity and protect it from damage.

Hair has a natural pH level of 4.5 to 5.5, making it slightly acidic. This acidity is important for protecting the hair and maintaining its structural integrity. Balancing pH levels in hair care products is crucial for healthy hair and scalp.

The statement is true - the natural pH of hair lies between 4.5 and 5.5, contributing to the overall health and protection of hair and scalp. It is essential to consider pH levels when choosing hair care products to maintain hair health.

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The formula for molariy is nomber of moles/volume

0.5=n/1=>n=0.5 moles

one mole contains 6.023*10^23 molecules

so 0.5 contain 3.0115*10^23 molecules

Answer:

Think about it. Chemistry is the study of matter.

Explanation:

Anything that has mass and takes up space, and the changes that matter will have when it is in different environments or conditions. Chemistry is used everyday with the development of plastics, wood burning, prescriptions, cosmetics, etc. Everything you touch is made of an element. there's 5 branches of chemistry including Biochemistry, organic chemistry and physical chemistry. -(you find the others).

Chemistry studies our surroundings on a molecular level through atoms and molecules with chemical reactions and understanding the specific properties. There are patterns on the periodic table you should check out.

good luck and have fun!

Answer:

chemistry is the study of structure of substance and what happens to them in different conditions

The cultures of prehistoric humans are primarily known through the excavation of stone tools and other durable artifacts, such as the Oldowan and Acheulian tool traditions.

Stone tools and imperishable artifacts serve as key archaeological evidence for understanding prehistoric cultures. Through meticulous excavation and analysis, archaeologists have been able to piece together the lifestyles, technological advancements, and social behaviors of early human societies. The term "paleolithic" refers to the Old Stone Age, a time when humans relied on stone tools as their primary implements.

The Oldowan tool tradition is considered the earliest stone tool industry, dating back around 2.6 million years ago. It is characterized by simple tools, such as choppers and scrapers, which were crafted by flaking off pieces from larger stones. These tools were primarily used for basic activities like butchering and processing animal carcasses.

Later, the Acheulian tool tradition emerged around 1.76 million years ago, representing an advancement in stone tool technology. Acheulian tools, such as handaxes and cleavers, were more refined and standardized, showcasing an increased level of sophistication in tool-making techniques. These tools served a wide range of purposes, including hunting, woodworking, and shaping raw materials.

By studying the Oldowan and Acheulian tool traditions, researchers gain valuable insights into the cognitive abilities, cultural development, and technological progress of early humans. The examination of these artifacts provides evidence of their adaptability, problem-solving skills, and the gradual refinement of their tool-making techniques over time.

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Answer:

pa brainliest answer po pa heart pa follow me and back

Explanation:

SUMMURY

Radiation is energy. It travels in the form of energy waves or high-speed particles. Radiation can occur naturally or be man-made. ... Ionizing radiation, which includes ultraviolet radiation, radon, x-rays, and gamma rays.

Radiation is energy that comes from a source and travels through space at the speed of light. This energy has an electric field and a magnetic field associated with it, and has wave-like properties. You could also call radiation “electromagnetic waves”.

DIFFENITION :

radiation

1a: the action or process of radiating

b: the process of emitting radiant energy in the form of waves or particles

c(1): the combined processes of emission, transmission, and absorption of radiant energy

(2): the transfer of heat by radiation

— compare CONDUCTION, CONVECTION

2a: something that is radiated

b: energy radiated in the form of waves or particles

3: radial arrangement

4: ADAPTIVE RADIATION

Scientific advances have helped with the advancement of technologies and to help us solve problems. In the area that these advances have helped positively and negatively is waste production. So the correct option is B.

Waste production occurs as a consequence of any activity in which man is involved, such as residentially, by industry. Some of this waste can be recycled and reused, which makes the process cleaner, but there are some products that remain confined and can cause damage to the environment.

Recycling waste will have benefits such as reducing energy consumption, helping the environment, reducing pollution. But it also has its negative side as it has a high cost and the products, when recycled, will be of low quality.

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Answer:

A

Explanation:

I believe the answer is A. An object is every color except the color we see, or the color that bounces off of said object. Therefore if a carpet is yellow, the carpet is every color but yellow. Yellow is the color that it rejects, bounces off of it, and the one we see.

To solve this we must be knowing each and every concept related to reflections. Therefore, a pair of jeans look blue because  it reflects blue light.

In physics, reflection usually described as a change in the orientation of a waveform at the interface of two distinct media, bouncing the waveform back onto the original medium.

The color we perceive is primarily determined by how things interact with lighting as well as finally reflect or transfer it to our eyes. The color we perceive is primarily determined by how things interact with lighting as well as finally reflect or transfer it to our eyes. A pair of jeans look blue because  it reflects blue light.

Therefore, a pair of jeans look blue because  it reflects blue light.

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Answer:

Energía geotérmica (calor → energía eléctrica) Motores térmico, como el motor de combustión interna utilizado en automóviles o el motor de vapor (calor → energía mecánica) Energía térmica oceánica (calor → energía eléctrica) Represas hidroeléctricas (energía potencial gravitacional → energía eléctrica)

Explanation:

Answer:

One type of energy can change into another type of energy. Energy transformation means the changing of energy from one type to another, e.g. from kinetic energy to electrical energy, or from potential energy to kinetic energy.

Explanation:

Every carbon atom in the organic molecules that make up your body must recently have been part of a living organism or a plant. This is because carbon is a key component of organic compounds, which are the building blocks of life. When living organisms and plants die and decompose, their organic molecules break down and release carbon into the environment. This carbon can then be used by other living organisms to build new organic molecules, including those found in your body. So, ultimately, every carbon atom in your body can be traced back to a previous living organism or plant.

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The carbon atoms in our bodies most recently belonged to carbon dioxide in the Earth's atmosphere. They become part of us through the carbon cycle, which starts with photosynthesis in plants and continues with our consumption of plants and animals.

Every carbon atom in the organic molecules that make up our bodies was most recently part of carbon dioxide in the Earth's atmosphere. They become part of our bodies through a process known as the carbon cycle. This process begins with photosynthesis, where plants use sunlight to turn carbon dioxide and water into sugars and oxygen. When we consume these plants, or animals that have consumed these plants, the carbon molecules become part of us. Furthermore, the oxygen we breathe also contains carbon, which our bodies convert into organic molecules during respiration.

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Answer:

5 degrees

Explanation:

I think I might be wrong id k

The conjugate acid has one more H+ ion than the base and its chemical formula is written with H+ as the cation.

In order to draw the conjugate acid for a base, it is important to understand the concept of Bronsted-Lowry acids and bases. According to the Bronsted-Lowry theory, an acid is a substance that donates a proton (H+) and a base is a substance that accepts a proton.To draw the conjugate acid for a base, you need to add a proton to the base. The conjugate acid will have one more H+ ion than the base and its chemical formula will be written with H+ as the cation. For example, NH3 is a base and its conjugate acid is NH4+.

Here are a few steps to draw the conjugate acid for a base:

1. Identify the base that you want to draw the conjugate acid for.

2. Add a proton (H+) to the base.

3. Write the chemical formula for the conjugate acid, with H+ as the cation.

For example, let's say the base is OH-. The conjugate acid will be H2O, since H+ will be added to OH- to form H2O.OH- + H+ → H2O

Therefore, the conjugate acid for the base OH- is H2O.In conclusion, the conjugate acid for a base is obtained by adding a proton to the base.

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\((NH_4)_2S\)  will form as a solid precipitate in this reaction.

The double displacement reaction is a reaction in which two reactants exchange ions to produce 2 new compound. As an consequence of double displacement reaction , precipitates frequently occur. A precipitate is created when two components from the solution combine.

It is obvious that the sulfide group formed the precipitate because sulfides are often not soluble in water but sodium nitrate is easily soluble in water.

so   \((NH_4)_2S\)   will form precipitate during this double displacement reaction.

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Answer:

A tectonic boundary where two plates are moving toward each other. If the two plates are of equal density, they usually push up against each other, forming a mountain chain. If they are of unequal density, one plate usually sinks beneath the other in a subduction zone. The western coast of South America and the Himalayan Mountains are convergent plate boundaries. Also called active margin collision zone See more at tectonic boundary. Compare divergent plate boundary.

Answer:

C. The greater the pressure

Explanation: If they move faster, the particles will exert a greater force on the container each time they hit the walls, which leads to an increase in the pressure of the gas. If the walls of the container are flexible, it will expand until the pressure of the gas once more balances the pressure of the atmosphere.

Answer: Greater The Pressure

Explanation: Greater velocity results in a greater pressure