what+mass+of+solution+containing+9.00%+sodium+sulfate,+,+by+mass+contains+1.50+g+?

Answer:the first one

Explanation:

Answer:

Ribosomes are found in both cells

The density of the object is \(8.00 g/cm^3.\)

For calculating the density of the object, we can use the principle of buoyancy. The apparent loss of weight of the object in water is equal to the buoyant force acting on it, which is equal to the weight of the water displaced by the object.

Given that the mass of the object in air is 40.0 grams and its apparent mass in water is 35.0 grams, we can calculate the volume of water displaced.

Apparent loss of weight = Weight in air - Weight in water

                         = Mass in air * Acceleration due to gravity - Mass in water * Acceleration due to gravity

Using the values provided, the apparent loss of weight is:

Apparent loss of weight = (40.0 g - 35.0 g) * \(9.8 m/s^2\)

Now, we need to calculate the volume of water displaced. The volume of water displaced is equal to the volume of the object.

Volume of water displaced = Mass of water displaced / Density of water

Since the density of water is 1 g/cm^3, the volume of water displaced is equal to the mass of water displaced.

Volume of water displaced = Mass in air - Mass in water

Using the values provided, the volume of water displaced is:

Volume of water displaced = (40.0 g - 35.0 g) cm^3

Finally, we can calculate the density of the object:

Density = Mass in air / Volume of water displaced

Using the values provided, the density of the object is:

Density = 40.0 g / (40.0 g - 35.0 g) cm^3

Simplifying the equation gives us:

Density = \(8.00 g/cm^3\) (to three significant figures)

Therefore, the density of the object is \(8.00 g/cm^3.\)

To know more about density refer here:

https://brainly.com/question/29775886?#

#SPJ11

The principal law governing pollution of the nation’s surface waters is the Federal Water

Pollution Control Act, or Clean Water Act. Originally enacted in 1948, it was totally revised by

amendments in 1972 that gave the act its current dimensions. The 1972 legislation spelled out

ambitious programs for water quality improvement that have since been expanded and are still

being implemented by industries and municipalities.

This report presents a summary of the law, describing the statute without discussing its

implementation. Other CRS reports discuss implementation, including CRS Report R42883,

Water Quality Issues in the 113th Congress: An Overview, and numerous products cited in that

report.

The Clean Water Act consists of two major parts, one being the provisions which authorize

federal financial assistance for municipal sewage treatment plant construction. The other is the

regulatory requirements that apply to industrial and municipal dischargers. The act has been

termed a technology-forcing statute because of the rigorous demands placed on those who are

regulated by it to achieve higher and higher levels of pollution abatement under deadlines

specified in the law. Early on, emphasis was on controlling discharges of conventional pollutants

(e.g., suspended solids or bacteria that are biodegradable and occur naturally in the aquatic

environment), while control of toxic pollutant discharges has been a key focus of water quality

programs more recently.

Prior to 1987, programs were primarily directed at point source pollution, that is, wastes

discharged by industrial and municipal facilities from discrete sources such as pipes and outfalls.

Amendments to the law in that year authorized measures to address nonpoint source pollution

(runoff from farm lands, forests, construction sites, and urban areas), which is estimated to

represent more than 50% of the nation’s remaining water pollution problems. The act also

prohibits discharge of oil and hazardous substances into U.S. waters.

Under this act, federal jurisdiction is broad, particularly regarding establishment of national

standards or effluent limitations. Certain responsibilities are delegated to the states, and the act

embodies a philosophy of federal-state partnership in which the federal government sets the

agenda and standards for pollution abatement, while states carry out day-to-day activities of

implementation and enforcement.

To achieve its objectives, the act is based on the concept that all discharges into the nation’s

waters are unlawful, unless specifically authorized by a permit, which is the act’s principal

enforcement tool. The law has civil, criminal, and administrative enforcement provisions and also

permits citizen suit enforcement.

Financial assistance for constructing municipal sewage treatment plants and certain other types of

water quality improvements projects is authorized under Title VI. It authorizes grants to capitalize

State Water Pollution Control Revolving Funds, or loan programs. States contribute matching

funds, and under the revolving loan fund concept, monies used for wastewater treatment

construction are repaid to states, to be available for future construction in other communities.

Answer:

I believe it is 42.3 billion years old

Explanation:

Approximately 3.04 grams of magnesium would be required to react with 0.25 moles of hydrochloric acid.

To determine the mass of Mg required, we need to use the balanced chemical equation for the reaction between hydrochloric acid (HCl) and magnesium (Mg):

2HCl + Mg → MgCl2 + H2

From the balanced equation, we can see that 2 moles of HCl react with 1 mole of Mg. Therefore, if 0.25 mol of HCl reacts, we would need half of that amount, which is 0.125 mol of Mg.

To calculate the mass of Mg required, we need to multiply the number of moles of Mg by its molar mass. The molar mass of Mg is given as 24.31 g/mol. Therefore, the mass of Mg required can be calculated as follows:

Mass of Mg = Number of moles of Mg × Molar mass of Mg

Mass of Mg = 0.125 mol × 24.31 g/mol

Mass of Mg = 3.04 g

For such more questions on moles

https://brainly.com/question/19964502

#SPJ8

Answer:

Nitrogen-containing aromatic molecules can act as a base and accept a proton to form a conjugate acid. The basicity of these molecules depends on the ability of the nitrogen atom to donate an electron pair. The greater the electron density on the nitrogen atom, the more basic the molecule. Therefore, the order of increasing basicity for the following nitrogen-containing aromatic molecules is:

Benzene (does not contain a nitrogen atom)

Pyridine (contains a nitrogen atom in the aromatic ring)

Aniline (contains a nitrogen atom in the aromatic ring and an attached hydrogen)

Pyrrole (contains a nitrogen atom in the aromatic ring and is a 5-membered ring)

Indole (contains a nitrogen atom in the aromatic ring and is a 6-membered ring with a nitrogen atom attached to one of the carbons)

In summary, the ranking of nitrogen-containing aromatic molecules in order of increasing basicity is benzene, pyridine, aniline, pyrrole, and indole.

To know more about Nitrogen-containing aromatic click this link -

brainly.com/question/30694152

#SPJ11

The plane is mostly flying in the troposphere layer. This is because there is more turbulence.

Hope it helps you...

Hope it helps you...Answered by Benjemin ☺️

Answer:

Explanation:

no ask your teacher

The equilibrium concentrations of A and B are [A] = 0.102 M and [B] = 6.11 x 10⁻⁴ M, respectively. Using the Ideal gas equation, the expression for Kc can be written as follows :Kc = Kp / (RT)∆n.

Using the Ideal gas equation, the expression for Kc can be written as follows : Kc = Kp / (RT)∆n, where Kp is the equilibrium constant for the same reaction written in terms of the partial pressures of the gases, ∆n is the change in the number of moles of gaseous reactants and products, and R is the gas constant.

Since the volume of the container is given as 5.00 L, we can assume that the pressure of all the gases is the same, and hence the expression for Kp can be written as follows: Kp = P²(C) / P²(A).

So, the expression for Kc becomes: Kc = Kp / (RT)∆n = [C]² / [A]².

In the given reaction, there are no changes in the number of moles of gaseous reactants and products, and hence ∆n = 0.

The value of the gas constant R is 8.314 J mol⁻¹ K⁻¹. The temperature of the reaction is -17.6°C or 255.6 K. Hence,

Kc = Kp / (RT)∆n

= Kp / RT

= [C]² / [A]²,or Kp = Kc RT

= (3.5 x 10⁻⁵) (8.314) (255.6)

= 0.0728.

Substituting the values of Kp and the partial pressure of A in the expression for Kp, we get:

P²(C) / P²(A) = 0.0728,or [C]² / [A]²

= 0.0728.

Substituting the value of Kc in the above expression, we get: [B]² / [A]² = Kc

= 3.5 x 10⁻⁵.

So, [B] / [A] = 1.87 x 10⁻³. Now, since we know the value of [A], we can calculate the value of [B]:[A] = P(A) RT / (V)

= (1 atm) (0.08206 L atm K⁻¹ mol⁻¹) (255.6 K) / (5.00 L)

= 0.102 M.[B]

= [A] x √(Kc)

= 0.102 x √(3.5 x 10⁻⁵)

= 6.11 x 10⁻⁴ M.

Therefore, the equilibrium concentrations of A and B are [A] = 0.102 M and [B] = 6.11 x 10⁻⁴ M, respectively.

To know more about equilibrium concentrations, refer

https://brainly.com/question/13414142

#SPJ11

The empirical formula is the simplest way to represent a compound. It tells us what the relationship is with respect to the number of atoms between one element and another. To find the empirical formula in this case, we must first calculate the moles that react in the experiment. The number of moles will be found by dividing the given grams by the molar mass of the compound.

Molar mass Cu=63.546g/mol

Molar mass O2=31.998g/mol

Let's see then how many moles react:

We see that the amount in moles of both compounds are equal. Therefore, the relationship is 1 to 1, that is, for each mole of metallic copper, one mole of gaseous oxygen reacts. So, the produced compound of this reaction will have the following empirical formula:

The correct abbreviation for each metric unit is:

Kilogram - kg, Milliliter - ml, Kilometer- Km, Meter- m, Millimeter - mm, Centimeter - cm, Gram - g,  Liter - L, and Milligram - mg.

The metric system can be described as a system of measurement that succeeded the decimalized system based on the meter.  Each of the fundamental dimensions can be expressed by a single base unit of measure.

For quantities derived from the base units of the system, units derived from the base units are used such as the square meter being the derived unit for the area, a quantity derived from length.

Metric units can be described as units based on the meter, gram, or second and decimal multiples or sub-multiples of these. The units of the International System of Units (SI). By extension, they involve units of electromagnetism from the CGS units and SI units systems.

Learn more about Metric units, here:
https://brainly.com/question/19483018

#SPJ1

The chemical formula CH₂O contains 3 elements: carbon, hydrogen, and oxygen.

The chemical formula CH₂O represents formaldehyde, which is a simple organic compound.

To determine the number of elements in this formula, we count the different types of atoms that are present. In this case, there are three different types of atoms: carbon (C), hydrogen (H), and oxygen (O).

Therefore, the chemical formula CH₂O contains 3 elements: carbon, hydrogen, and oxygen.

Learn more about number of elements here: https://brainly.com/question/25916838

#SPJ1

Answer:thanks for the points

Explanation:

An increase in pressure is converted into heat and work, explains the flow of energy in an internal combustion engine. Gasoline is ignited and consumed within an internal combustion engine (ICE) by the engine itself.

The engine then partially transforms the energy from combustion into work. The engine is composed of a fixed cylinder and a rotating piston. There are three main types of internal combustion engines in use today: the spark ignition engine, which is mainly used in automobiles; the diesel engine, which is used in heavy machinery and industrial systems and has an advantage over the more compact and lighter ones due to improvements in cycle efficiency.

To learn more about engine, click here.

https://brainly.com/question/19117846

#SPJ1

Wave-particle duality is a fundamental concept in quantum mechanics that describes the dual nature of particles and waves. The following statements correctly describe wave-particle duality:

1. All matter exhibits wavelike motion: This statement reflects the wave nature of particles. Even though particles have localized positions, they also exhibit wave-like properties, such as diffraction and interference.

2. Matter and energy are different forms of the same entity: According to Einstein's theory of relativity (E=mc²), energy and mass are interconnected. This concept suggests that matter can be viewed as a form of energy.

3. Energy and mass can be interconverted: This statement is a direct implication of Einstein's famous equation. It means that mass can be converted into energy and vice versa. This phenomenon is observed in nuclear reactions and particle interactions.

Wave-particle duality highlights the wave-like and particle-like behaviors exhibited by particles at the microscopic level. It revolutionized our understanding of the fundamental nature of matter and laid the foundation for quantum mechanics.

To know more about Wave-Particle Duality theory, visit:

brainly.com/question/10260414

#SPJ11

Sulfur dioxide (SO2) is polar in nature and the electronegativity difference between sulfur and oxygen atoms makes it a polar molecule.

Sulfur dioxide is the chemical compound with the formula SO2 and it is a toxic gas that is responsible for the odor of burnt matches.

SO2 has a bent shape due to the presence of unbonded electrons on the sulfur and oxygen atoms.

Solid sulfur dioxide is a polar molecular solid because net dipole moment is non zero and constituent particles are molecules and the electronegativity of sulfur is 2.5 and that of oxygen is 3.5.

To know more about polar molecules, refer

https://brainly.com/question/1433127

#SPJ4

An intermolecular force that results when a hydrogen atom is bound to a very electronegative atom is called a hydrogen bond.

The intermolecular force in which a hydrogen atom that is bonded to a highly electronegative atom is attracted to an unshared pair of electrons of an electronegative atom in a nearby molecule is known as hydrogen Bond.

Electronegative atoms are the atoms which are electron rich, this gives the  atom's nucleus a negative charge. When electronegative atoms such as oxygen bond to hydrogen they pull the hydrogen's electron to themselves, thereby becoming more electronegative.

This causes a positive charge on hydrogen. The molecule thus formed is a polar molecule. Molecules with positive ends and negative ends are called polar.

To know more about intermolecular force here

https://brainly.com/question/29487928

#SPJ4

Its A CUHH!!!!!!

WHY???- BC I SAID SO CUHH

Panch Tattva refers to the five basic elements of nature - earth, water, air, fire, and space. To write a project report on this topic, you can follow the below-mentioned steps:

Introduction - Begin your report by introducing the concept of Panch Tattva and its importance in Hinduism and other religions.

Earth - Describe the element earth and its significance. Discuss the properties, uses, and importance of earth in our daily lives.

Water - Discuss the element water and its significance. Describe the properties, uses, and importance of water in our daily lives.

Air - Discuss the element air and its significance. Describe the properties, uses, and importance of air in our daily lives.

Fire - Discuss the element fire and its significance. Describe the properties, uses, and importance of fire in our daily lives.

Space - Discuss the element space and its significance. Describe the properties, uses, and importance of space in our daily lives.

Conclusion - Summarize the importance of Panch Tattva and its relevance in our daily lives.

To know more about the Project, here

https://brainly.com/question/29094859

#SPJ1

When placing test tubes in the centrifuge, the best practices are the correct option are :

b. Place test tubes containing approximately equal volumes in opposite positions on the rotor.

d. Never put stoppers or other items in the centrifuge with your tubes.

The centrifuge is the device used in the laboratories to separate the materials according to the sedimentation coefficient. When we are operating the centrifuge, the students should careful that the lid is shut, and the safety knob is turned.

Thus,  the best practices when placing test tubes in the centrifuge are to place the test tubes containing equal volumes in the opposite positions and never put the stoppers in the centrifuge.

To learn more about test tubes here

https://brainly.com/question/14865029

#SPJ4

The safety data sheet is used while working in a laboratory and handling chemicals. According to SDS, hydrochloric acid should be stored in a cool, well-ventilated area. Thus, option 2 is correct.

Hydrochloric acid has been defined as a strong acid that is liquid formed by the two elements, hydrogen gas, and chloride. Because of their corrosive nature and high reactivity they are recommended to be stored in dark-colored glass bottles.

They should be stored in a cool and well-ventilated area as they can easily react with other metals, alkalis, oxidizing agents, etc. The reaction results in heat formation and gaseous vapors that are harmful when coming in contact.

Therefore, option 2. hydrochloric acid should be stored in dark and cool places.

Learn more about hydrochloric acid, here:

https://brainly.com/question/14201872

#SPJ2

Answer:

accepts an H⁺

Explanation:

The following balanced ionic equation is given in this question;

HCl + H₂O → H₃O⁺ + Cl⁻

According to Brønsted–Lowry acid–base theory, a base is any substance that can accept hydrogen ions or protons (H+). Using this definition for the above equation, water (H2O) accepts a proton or H+ that was donated by HCl to form H30+ (hydronium ion), hence, water is acting as a BASE in this reaction because it accepts an H+.

The grams of the KI are in the 25.0 ml of a 3.0 % m/v of the KI solution is 0.75 g.

The volume of the solution = 25 mL

The mass by volume of KI = 3 % m/v

The potassium iodide solution will contain the 3.0 g of the potassium iodide for the every 100 mL of the solution.

The amount of the KI in grams is as follows :

The mass of the KI in grams = (25 mL× 3 g ) / 100 mL

The mass of the KI in grams = 0.75 g

Thus, the amount of the KI in the grams is 0.75 g in the volume of the 25 mL.

To learn more about KI here

https://brainly.com/question/13684032

#SPJ4

Answer:

i think its 32

Explanation:

The concept of energy balance refers to the equilibrium between the energy input into a system and the energy output from that system. It is based on the principle of conservation of energy, which states that energy cannot be created or destroyed but can only be transferred or transformed from one form to another.

In terms of human energy balance, it involves the energy intake from food and beverages (energy in) and the energy expenditure through basal metabolic rate, physical activity, and other bodily processes (energy out). When the energy intake matches the energy expenditure, there is an energy balance. However, when there is an imbalance, either an excess or deficit of energy, it can lead to weight gain or weight loss, respectively.

For example, if a person consumes 2000 calories (energy in) through their diet and expends 2000 calories (energy out) through their daily activities and bodily functions, they maintain an energy balance. This means that the energy intake is equal to the energy expenditure, and their weight remains stable.

On the other hand, if a person consumes 2500 calories (energy in) but only expends 2000 calories (energy out), there is a positive energy balance. The excess energy is stored in the body as fat, leading to weight gain over time.

Conversely, if a person consumes 1500 calories (energy in) but expends 2000 calories (energy out), there is a negative energy balance. The body needs to compensate for the energy deficit by utilizing stored energy reserves, such as fat, resulting in weight loss.

Support for the concept of energy balance comes from scientific studies on weight management and obesity. It has been shown that maintaining an energy balance is crucial for weight maintenance, while sustained positive or negative energy balances can lead to weight changes. Additionally, energy balance plays a role in various physiological processes, including metabolism, hormone regulation, and overall health.

By understanding and managing energy balance, individuals can make informed decisions regarding their diet, physical activity, and lifestyle to achieve and maintain a healthy weight and overall well-being.

To know more about energy balance, click here, https://brainly.com/question/31922451

#SPJ11

Answer:

See below.

Explanation:

Since energy is released when bonds form, the process of burning food can be explained through exothermic reactions. We use food as a resource to obtain energy through calories, where the chemicals that makeup food result in endothermic reactions to fulfill our dietary needs. As a result, that energy MUST be released since energy can neither be created nor destroyed. Therefore, it must come out as the bonds are broken (usually hydrogen bonds during the process of cellular respiration). While calories are being burned, energy is released, causing bonds to break and resulting in exothermic reactions.

Answer:

V₂ = 30.20 L

Explanation:

Given data:

Initial volume = 45 L

Initial temperature = 298 K

Final temperature = 200 K

Final volume = ?

Solution;

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

V₂ = V₁T₂/T₁  

V₂ = 45 L × 200 K / 298 k

V₂ = 9000 L.K / 298 K

V₂ = 30.20 L

Answer:

Static electricity is the result of an imbalance between negative and positive charges in an object. ... When two materials are in contact, electrons may move from one material to the other, which leaves an excess of positive charge on one material, and an equal negative charge on the other.

Answer: 1) Contact between two substances.

Explanation:

#1 When fuel is running through pipes, there is a lot of contact between the fuel and the pipe.

#2 Before, people thought that Static at first was caused by friction, meaning the rubbing (of an object, pause) had something to do with static.

End note: Your welcome. My apologies if I was late, I was trying to find the answer to this question, too, until I got all this information while taking notes from my Physical Science lesson.

Answer:

it in a chromatography paper.

Explanation:

Water-based Ink is comprised of various colors, red,  black, orange, blue, etc. The ink in the Fountain pen is a good example of it. There's a combination of water and specific color pigment to create the various colors. Some pigments dissolve faster in water and are drawn further up the chromatography paper with the was while the others are becoming more tied to the paper and going slower.