How many forces act on each person? When they put there hands together or High five

Answer : The empirical formula is [tex]P_2S_3[/tex].

Explanation :

Molecular formula : It is represented by the actual number of the atoms of all the elements present in a compound.

Empirical formula : It is represented by the simplest whole number of the atoms of all the elements present in a compound.

The given molecular formula is [tex]P_2S_3[/tex].

For determining the empirical formula, we need to determine the valency which is divided by each element to get the empirical formula.

In the given formula, the valence is 1.

So, the empirical formula is [tex]P_2S_3[/tex].

The empirical formula of P2S3 is the same as its molecular formula.

The empirical formula for a chemical compound represents the simplest whole-number ratio of its constituent elements. In the case of P2S3, the compound is already in its lowest whole-number ratio, meaning the empirical formula is the same as the molecular formula; thus, the empirical formula is also P2S3.

For example, for the empirical formula of glucose which is C6H12O6, it can be simplified to CH2O since the subscripts can divide by 6 without fractions. Unlike glucose, the subscripts in P2S3 cannot be reduced further as they are already at their lowest ratio.

Answer:

Option (b) 0.67 M

Explanation:

The following Data were obtained from the question:

Mole of MgCl2 = 0.5 mole

Volume of solution = 750mL

Molarity of MgCl2 =?

Next, we shall convert the volume given from mL to L. This is illustrated below:

1000mL = 1L

Therefore 750mL = 750/1000 = 0.75L

Now we can obtain the molarity of MgCl2 as follow:

Molarity is defined as the mole of solute per unit litre of the solution i.e

Molarity = mole /Volume

Molarity = 0.5/0.75

Molarity of MgCl2 = 0.67 M

Nina fell off her skateboard because the rough patch of pavement increased friction significantly, making the skateboard come to an abrupt halt. This principle is attributable to the physics of forces and friction.

What happened to Nina was due to the principle of physics, particularly in relation to forces and friction. When she encountered the rough patch of pavement, her skateboard wheel and the pavement started interacting. The irregularities on the rough pavement significantly increased friction, opposing the motion of the skateboard.

Normally, when Nina is skateboarding on smooth pavement, the wheel's contact with the ground is relatively small, thus minimizing friction. However, on rough terrain, the increased friction force can exceed the forward momentum and cause the skateboard to stop suddenly, resulting in Nina falling.

It is similar to how a ball rolling on a smooth surface will eventually stop due to frictional forces. In this case, the rough patch of pavement acted like a sudden increase in friction, arresting the skateboard's motion unexpectedly. It's also akin to a bullet being stopped by a board; the board exerts a force strong enough to overcome the bullet's kinetic energy.

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Answer: 8.2

Explanation:

pH of a solution is  - Log [ H+].

pH = - Log [ 6.2 x 10-9 M]

     = 9 - 0.7924

pH =  8.24 approx 8.2

Answer:

The correct answer is: 60.0 g acetic acid and 40.0 g water

Explanation:

The percentage in mass (% by mass) is expressed as follows:

% by mass = % m/m = grams of solute/100 g solution

If the solution of acetic acid is 60.0% by mass, that means that there are 60 grams of solute (acetic acid) in 100 grams of solution. Besides, a solution is composed by solute and solvent (water). If there are 60 grams of solute, there are 40.0 grams of solvent (water) in 100 grams of solution.

So, the solution contains 60.0 g acetic acid and 40.0 g water.

Describing connections in science texts enhances comprehension of complex concepts, demonstrating how individual ideas fit within larger scientific frameworks. Engaging with texts and visualization aids in understanding processes, while reflection and historical context further deepen one's grasp of the subject matter.

Understanding how ideas in science texts are connected is crucial for grasping complex scientific concepts and their applications. These connections form a network of knowledge that illustrates how individual ideas fit within the broader scientific context, aiding in comprehension of how things work and why they change. For example, a concept in biology might be related to certain chemical reactions, which are based on molecular behavior, and further down to atomic interactions.

It is essential for students to engage with science texts to become skilled at interpreting scientific information and to apply it in various settings, such as college and career environments. Visualizing the text content helps in understanding the processes described, thus establishing a clearer picture of the scientific phenomena. Utilizing strategies from other disciplines, like mathematics, assists with the interpretation of symbols, graphics, and charts which are prevalent in science texts.

Reflection on teaching others about scientific topics, understanding the historical development of scientific knowledge, and considering the nuances of the nature of science are beneficial practices mentioned in the texts. These practices reinforce understanding and articulate the connection between scientific ideas and their practical implications.

Answer:

The dissociation of copper sulfate into ions is an exothermic chemical reaction that releases heat into the surroundings.

Explanation:

Some of the potential energy stored in the solid sample of anhydrous copper sulfate is released as heat as the sample dissolves and dissociates into ions in the water. This is due to the large lattice energy of the crystalline copper sulfate.

hope this helps

Answer:

Option B. HgCl2

Explanation:

Data obtained from the question include:

Mass of Mercury (Hg) = 47.3g

Mass of chlorine (Cl) = 16.7g

The empirical formula for the compound can be achieved by doing the following:

Step 1:

Divide by their individual molar mass

Hg = 47.3/201 = 0.235

Cl = 16.7/35.5 = 0.470

Step 2:

Divide by the smallest to express in whole number:

Hg = 0.235/0.235 = 1

Cl = 0.470/0.235 = 2

Therefore, the empirical formula is HgCl2

Answer:

The most efficient way to protect biodiversity is by using habitat preservation.

Habitat preservation helps all species in an ecosystem.

Explanation: This is the original copy of Boriscat's answer

Wildlife conservation is the preservation and protection of animals, plants, and their habitats. By conserving wildlife, we're ensuring that future generations can enjoy our natural world and the incredible species that live within it.

another answer:

Preserving habitats is essential to preserving biodiversity. Migratory species are particularly vulnerable to habitat destruction because they tend to inhabit more than one natural habitat. Altering a natural habitat even slightly can result in a domino effect that harms the entire ecosystem.

Another answer:

Habitat preservation is the best option for the species in an ecosystem not only does it help those in danger and as well as protect biodiversity but it also  helps all species in an ecosystem.

WHY IS IT important to protect animals? not an answer just a q and a :D

For maintaining a healthy ecological balance on this earth, animals, plants and marine species are as important as humans. Each organism on this earth has a unique place in food chain that helps contribute to the ecosystem in its own special way. But, sadly today, many of the animals and birds are getting endangered.

Pick which one suits you best :)

I suggest the first one!

Explanation:

Answer:

6.69 moles

Explanation:

Data obtained from the question include:

Volume = 2230mL

Molarity of NaOH = 3 M

First, we'll convert 2230mL to L. This is illustrated below:

1000mL = 1L

2230mL = 2230/1000 = 2.23L

Now, we can obtain the number of mole of NaOH in the solution as follow:

Molarity = mole /Volume

Mole = Molarity x Volume

Mole of NaOH = 3 x 2.23

Mole of NaOH = 6.69 moles

Therefore, the total number of mole of the solute (NaOH) in the solution is 6.69 moles

Final answer:

To find the total moles of solute in a 3.0 M NaOH solution of 2230 ml, calculate 3.0 mol NaOH per liter and multiply by 2230 ml. This results in 6.69 moles of NaOH in the given solution.

Explanation:

The total number of moles of solute in 2230 ml of 3.0 M NaOH solution can be calculated as follows:

Calculate the moles of NaOH: 3.0 mol NaOH/L x 2.230 L = 6.69 moles NaOH.

So, there are 6.69 moles of NaOH in the given solution.

Answer:

1) total, 2) potential, 3) zero, 4) inversely.

Explanation:

1) The total energy in a mechanical system is determined by adding the potential and kinetic energy together.

2) The initial potential energy is equal to zero because the starting point is set at zero height to make things easier.

3) In the example, the final kinetic energy is determined to be zero because at the peak height, the ball instantaneously stops.

4) In this system, potential and kinetic energy are inversely proportional.

The system has an energy that can be conserved in the system, and when work is performed, the energy has been converted to working energy.

The following sentences can be completed as:

Total energy = Potential energy + Kinetic energy

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The composition of a galaxy is typically observed through the distribution of stars, gas, and dark matter, with galaxies containing significant amounts of low-mass stars contributing to a high mass-to-light ratio. The universe, on the other hand, is largely composed of regular matter, dark matter, and dark energy, with dark components forming 95% of its makeup and influencing the large-scale structure. Cosmologically, the universe is homogeneous and isotropic, though galaxies group into complex structures like clusters and superclusters.

The composition of a galaxy compared to the composition of the universe is a fascinating aspect of cosmology, which is the study of the character and evolution of the universe. Within the universe, matter is distributed across approximately 10¹¹ galaxies, which form together in structures such as clusters and superclusters. The Milky Way Galaxy, as a part of the Local Group, is one of these galaxies, containing more stars and being slightly larger than the average galaxy.

While we see significant clouds of gas, stars, and a mysterious component known as dark matter in galaxies, the universe's largest composition includes regular matter, dark matter, and dark energy. Regular matter, which is familiar to us on Earth, only comprises around 5% of the universe, with most of it consisting of hydrogen and helium. Dark matter and dark energy make up the remaining 95%, and they have an immense impact on the universe's structure, but remain undetectable in Earth-bound laboratories.

Galaxies, as enormous collections of stars, gas, and other materials, have a mass-to-light ratio generally greater than 1, indicative of more mass being present than the light we can see. This is primarily due to the preponderance of low-mass stars in galaxies which contribute significantly to the overall mass without adding much light. In contrast, the Universe's composition is largely uniform and isotropic following the cosmological principle, differing primarily in its large-scale structure shaped by the distribution of dark matter and energy.

Answer:

b,c,d

Explanation:

on edg

Answer:

B, C, and D

Explanation:

i just did it on edge

Answer:

CH4<HClO2<HClO<H2O<HCl

Explanation:

In ranking the compounds on the basis of increasing positive charge of hydrogen, we must consider the relative oxidation numbers of the various elements in the compounds.

Methane contains a nonpolar covalent bond, HClO2 contains a chlorine atom in +3 oxidation state, HClO contains a chlorine atom in +1 oxidation state. The more the positive charge on the halogen atom the lesser the magnitude of positive charge on the hydrogen atom. Between water and HCl, chlorine is more electro negative hence HCl will contain a more positively charged hydrogen atom than water.

To determine the molecular mass of the acid used in the esterification reaction, additional information about the alcohol involved or the identity of the acid is needed. Without these details, an accurate determination of the acid's molecular mass is impossible.

To find the molecular mass of the acid used in the esterification reaction to create a fat with the molecular mass of 386 g/mol, further information is needed. This would typically include the molecular mass of the alcohol also involved in the reaction, or the identity of the acid or alcohol. The molecular mass of the acid or the alcohol could be deduced from the formula of the reaction itself:

Fat = Acid + Alcohol - Water

However, without knowing the molecular mass of the alcohol or the identity of the acid or alcohol, we cannot accurately determine the molecular mass of the acid alone.

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Answer:

500

Explanation:

Final answer:

There are 25 moles of solute in 5 liters of a 5 M solution.

Explanation:

To find the number of moles of solute in the solution, we need to multiply the molarity by the volume of the solution:

Moles of solute = (5 M)(5 L) = 25 mol

Therefore, there are 25 moles of solute in 5 liters of a 5 M solution.

This formula is derived from the definition of molarity, which is the number of moles of solute per liter of solution. By multiplying the molarity (in moles per liter) by the volume of the solution (in liters), you obtain the total moles of solute.

This fundamental concept is essential in chemistry for accurately quantifying the amount of substance in a solution, enabling scientists and researchers to make precise measurements and carry out various chemical analyses. Understanding the relationship between molarity, volume, and moles is fundamental for tasks such as dilution, titrations, and other quantitative aspects of solution chemistry.

The idea here is that a reaction's percent yield tells you how many moles of a product will actually be produced by a chemical reaction for every  

100

moles of this product that could theoretically be produced by the reaction.

In your case, the reaction is said to have a percent yield of  

30

%

. This means that for every  

100

moles of a product that the reaction could produce, you will only get  

30

moles.

The best high level scientific question among the options is; "Does the amount of salt in water affect the temperature at which it boils?"

A scientific question must be empirical. This means that it must be testable. Testable means that it can be verified by experiments under carefully controlled conditions.

Looking at our options, the only question that can be answered by carefully controlled experiment is; "Does the amount of salt in water affect the temperature at which it boils?".

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Answer:

Ag = silver

Pb = lead

O = oxygen

Ar= argon

Zn = zinc

Cl = chlorine

N = nitrogen

C = carbon

Explanation:

The symbol with the element name is Ag silver, Pb lead, O oxygen, Ar argon, Zn zinc, Cl chlorine, N nitrogen and C carbon.

Elements are defined as a pure substance made up of only one sort of atom with the same number of protons in its nucleus.

It is also defined as a substance that cannot be broken down further by any chemical reaction.

There are basically three types of elements.

Thus, the symbol with the element name is Ag silver, Pb lead, O oxygen, Ar argon, Zn zinc, Cl chlorine, N nitrogen and C carbon.

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The identity of the resulting atom after a nuclear reaction, such as decay or fusion, is determined by the number of protons in the nucleus. The atomic number, which defines the element, is the total count of protons. Therefore, the resulting atom's identity is defined by its atomic number post-reaction.

Chemistry fundamentally revolves around the study of matter and the changes it undergoes. A critical component of understanding matter is knowing how to identify different elements. Elements are primarily defined by the number of protons in their atomic nuclei, a value known as the atomic number. When a nuclear reaction occurs, such as radioactive decay, one element can transform into another. To identify the resulting atom, one would determine the new atomic number - the count of protons in its nucleus after the reaction has occurred. This is crucial in nuclear chemistry and physics, as it allows scientists to predict the outcomes of such reactions and understand the changes in elemental identity.

Answer:

0.721 g/L

Explanation:

Ideal gas equation ->PV= nRT   ; n= mass (m)/ molar mass (M);

densitiy= mass (m)/ volume (V)

PV= (m/M)*RT  -> PVM= mRT   -> PM/RT= m/V   -> PM/RT=d

We need to put in SI units

105 Kpa= 1.04 atm

25°C= 298 K

d= (1.04 atm * 17 g/ mol)/(0.0821 * 298 K) = 0.721 g/L

Answer:

The charge of an electron is negative.

The charge of a proton is positive.

A neutron does not have a charge.

Answer:

Negative

Explanation:

PROtons have POSITIVE charges, electrons have negative charges

Answer:

B

Explanation:

Answer is B

You welcome

Answer:

Linoleic acid

Explanation:

Carbonic acid, Sulfuric acid, and Nitric acid are the primary components of acid rain, all resulting from air pollution in the form of sulfur and nitrogen compounds respectively, reacting with water molecules in the atmosphere.

The primary components of acid rain are Carbonic acid, Sulfuric acid, Nitric acid. Acid rain is a result of air pollution, specifically sulfur and nitrogen compounds released from burning fossil fuels, which react with the water molecules in the atmosphere to form acids.

These acids then fall to the ground in the form of precipitation, giving us what we know as 'acid rain'. Sulfuric acid is formed from sulfur dioxide, while nitric acid forms from nitrogen oxides. Carbonic acid is formed by the reaction of carbon dioxide with water.

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Answer:

It's not plugged in. A fuse is blown. Oxygen is no longer present because we killed all our trees. The pressure gauge is broken and all your Oxygen is gas because the gauge says you are at 30 atmospheres when you are actually at 1.5. The cooler is outdated and requires CFCs, which are now illegal. The cooler is too small to reduce the temperature of the quantity of oxygen you wish to liquefy. Your liquid oxygen machine is actually a liquid helium machine. The company that sold you your liquid oxygen machine was scamming you and now it looks really complex but in fact if you break it open with a sledgehammer, you will see that the inside is made completely of useless nonbouyant rubber duckies. Operator error.

Explanation:

All are entirely possible and would cause a liquid oxygen machine to be defected.

Possible reasons for the liquid oxygen machine not working include problems with pressure, the cooling system, and valves or pipes.

There could be several reasons why the liquid oxygen machine is not working. One possibility is that there is a problem with the pressure inside the machine. If the pressure is too low or too high, it can prevent the liquid oxygen from being produced.

Another reason could be a fault in the cooling system. Liquid oxygen needs to be kept at very low temperatures in order to remain in its liquid state. If the cooling system is not functioning properly, the liquid oxygen may not be able to be produced.

Lastly, there could be an issue with the valves or pipes that are used to transport the liquid oxygen. If these components are damaged or not properly connected, it can prevent the flow of the liquid oxygen.

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Answer:

  58.443 g/mol

Explanation:

The molar mass of NaCl is the sum of the molar masses of the individual atoms:

  Na: 22.989770 g/mol

  Cl: 35.453 g/mol

The total molar mass is ...

  NaCl: 58.443 g/mol

__

The molar mass does not depend on whether the material is in solution or in any other form.

Answer:

a, d, f

Explanation:

ΔHrxn = ΔH(CCl4) -ΔH(CH4) = - 106.7 -(-74.8) = - 31.9 kJ/mol

Answer

C

Explanation:

If the athlete can run 9 kilometers in one hour, and thirty minutes is half an hour, then you divided the distance the athlete can run(9 kilometers) by 2, getting 4.5 kilometers in 30 minutes. Hope this helped.

Through the vibration of substances, a chemical reaction can take place; when they vibrate vigorously enough, they can break down into smaller molecules. The general form of a chemical equation is Reactants → Products.

Chemical reactions are the processes by which a substance or substances change chemically to create a new substance or substances with entirely new attributes. Products are completely distinct in nature and identity from reactants.

In a chemical reaction, molecules' preexisting chemical bonds known as reactants break, and new chemical bonds known as products are created as a result.

New products can form as a result of a chemical reaction, which can also cause physical changes like the production of precipitates, the generation of heat and energy, or colour changes.

Reactants are substances that interact to make new substances, whereas products are those substances that result from the interaction.

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