Anything that takes up space is called _____

A 20% solution can be made from 45g of NaCl by:

d. 225 mL

To determine how much of a 20% solution can be made from 45g of NaCl, we need to calculate the volume of the solution.

First, we need to understand that a 20% solution refers to 20 grams of NaCl dissolved in 100 milliliters of solution. This means that in every 100 mL of the solution, 20 grams of NaCl is present.

To find out the volume of the solution that can be made from 45g of NaCl, we can set up a proportion:

20 grams / 100 mL = 45 grams / X mL

Cross-multiplying the values, we get:

20 grams * X mL = 45 grams * 100 mL

Simplifying the equation:

20X = 4500

Dividing both sides by 20:

X = 4500 / 20

X = 225

Therefore, the volume of a 20% NaCl solution that can be made from 45g of NaCl is 225 mL.

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The structures of two isomeric alkyl magnesium bromides that would react with water to give propane are:

Isopropylmagnesium bromide (CH3)2CHMgBr:

H H

| |

H3C - C - Mg - Br

n-Propylmagnesium bromide CH3CH2CH2MgBr:

H H H

| | |

H3C - C - C - Mg - Br

In both cases, when these alkyl magnesium bromides react with water, they will undergo a hydrolysis reaction, resulting in the formation of propane.

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The temperature of the system in equilibrium is 25.51⁰ C.

The equilibrium temperature of the system depends on the heat released from both gold and water. The total heat received by the system will equal to total heat released by objects. It should follow

Q released = Q received

The heat can be defined by

Q = m . c . ΔT

where Q is heat, m is mass, c is the specific heat constant and ΔT is the change in temperature.

The given parameters are

m = 200 g = 0.2 kg

T1 = 24.5⁰ C

c = 4200 J/kg⁰ C

Q received = 850 J

Lets assume that the value of equilibrium temperature is T. Hence,

Q released = Q received

m . c . ΔT = 850

0.2 . 4200 . ΔT = 850

ΔT = 1.01

T - T1 = 1.01

T - 24.5 = 1.01

T =  25.51⁰ C

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Answer:

used for making sari obtained from animal is silk

Conjugate bases are defined as the molecules or ions that remain after acids donate a proton. Conjugate base strength is determined by the strength of the parent acid. As a result, strong acids generate weak conjugate bases, while weak acids generate strong conjugate bases.

The correct option is b. HClO_4.HClO4 is the strongest acid since it has the highest Ka. Because the conjugate base of HClO4 is ClO4, which is quite stable and can handle negative charges better than the others, it is the strongest conjugate base. HClO4 is the strongest acid among the options provided because it has the highest Ka. The conjugate base of HClO4 is ClO4, which is a very stable base because it can manage the negative charge better than any other options provided.

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IBM's Watson utilizes a massively parallel, text mining-focused, probabilistic evidence-based computational architecture called DeepQA.

IBM's Watson utilizes a massively parallel, text mining-focused, probabilistic evidence-based computational architecture called DeepQA.

                                    IBM's Watson utilizes a massively parallel, text mining-focused, probabilistic evidence-based computational architecture called DeepQA.

                            IBM's Watson utilizes a massively parallel, text mining-focused, probabilistic evidence-based computational architecture called DeepQA.

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Answer:

The heat required to vaporize 102.3 grams of H₂O(l) is 231198 J.

Explanation:

The heat required to vaporize 102.3 g of H₂O(l) can be calculated as follows:

\( q = m*\Delta H_{v} \)

Where:

q: is the heat  

ΔHv: is the heat of vaporization of water = 2260 J/g

m: is the mass = 102.3

\(q = m*\Delta H_{v} = 102.3 g*2260 J/g = 231198 J\)

Therefore, the heat required to vaporize 102.3 grams of H₂O(l) is 231198 J.

I hope it helps you!

The heat required to vaporize 102.3 grams of H₂O(l) is 231198 J.

The heat required to vaporize 102.3 g of H₂O(l) can be calculated as follows:

\(q=m\times H_v\).....(1)

Here,  q is the heat  

\(H_{v}\): is the heat of vaporization of water = 2260 J/g

m: is the mass = 102.3 g

Substitute the value in equation (1) as follows:-

\(q=102.3\ g\times2260\ J/g\\\\=231198\ J\)

Therefore, the heat required to vaporize 102.3 grams of H₂O(l) is 231198 J.

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Answer:A

Explanation:

Answer:

m

Explanation:

Given what we know about elements of the periodic table and their properties, we can confirm that the list with elements that have very similar properties is option B.

Therefore, we can confirm that since option B is the choice that lists all elements pertaining to the same group, in this case, the Alkaline-earth metals, it is the correct option as they will all have very similar properties.

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The ion that has 26 protons, 28 neutrons, and 24 electrons is Iron (Fe) (option c).

An element can be determined by the number of protons in the nucleus of its atom. The number of protons present in an atom is referred to as the atomic number of the element.

This means that the number of protons in an atom is unique to a specific element.

Iron (Fe) has 26 protons in the nucleus of its atom.

Therefore, an ion with 26 protons is an ion of the element iron (Fe).

Magnesium (Mg) has 12 protons, Chromium (Cr) has 24 protons, Xenon (Xe) has 54 protons and Nickel (Ni) has 28 protons.

Thus, an ion which has 26 protons, 28 neutrons, and 24 electrons  is Fe (option c)

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The volume of water added to dissolve potassium hydrogen phthalate (KHP) does not matter because the mass of KHP used is known and it will dissolve completely in any volume of water.

In volumetric analysis, the primary objective is to find the exact concentration of an analyte in a given solution. Analyte refers to the substance whose concentration is to be determined.In order to measure the analyte concentration, the known volume of the titrant of known concentration is added to the analyte until the endpoint is reached.Endpoint refers to the point in a titration where the reaction between the analyte and titrant is complete. The endpoint can be detected by observing a physical change in the system.In the case of KHP, it dissolves completely in any volume of water.

Therefore, the mass of KHP used can be accurately measured and dissolved in any volume of water. As a result, the volume of water added to dissolve the KHP does not affect the accuracy of the experiment.In summary, the volume of water added to dissolve KHP does not matter because the mass of KHP used is known and it will dissolve completely in any volume of water.

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The salt will be dissolved into the water at 80℃.  At 80℃, the solubility of sodium chloride in water is approximately 39.2 g/100 mL. This means that in order for all of the salt to be dissolved into the water.

The solution would need to contain at least 140.1 g of water 55 g / 0.392 g/100 mL. However, in this case, the solution only contains 150 g of water. This means that there is not enough water present to dissolve all of the sodium chloride, and some of the salt will remain undissolved in the solution.

To determine if all of the salt will dissolve, we need to find the solubility of sodium chloride in water at 80℃. The solubility of sodium chloride at 80℃ is approximately 39 g of salt per 100 g of water.  Calculate the solubility of sodium chloride in 150 g of water.  39 g of salt per 100 g of water * 150 g of water / 100 g of water = 58.5 g of salt.

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Yes, all of the salt will be dissolved into the water at 80℃, based on the solubility of sodium chloride in water at that temperature and the amount of sodium chloride in the given solution.



According to the solubility curve for sodium chloride in water, the solubility of sodium chloride at 80℃ is approximately 127 g/100 mL. This means that at 80℃, 100 mL of water can dissolve up to 127 g of sodium chloride.

In the given solution, we have 150 g of water and 55 g of sodium chloride. To determine whether all of the salt will dissolve, we need to compare the amount of sodium chloride in the solution to the maximum amount that can dissolve in the given amount of water.

Since we have 150 g of water, we can calculate the maximum amount of sodium chloride that can dissolve at 80℃ as follows:

127 g sodium chloride/100 mL water x 150 mL water = 190.5 g sodium chloride

This means that at 80℃, 150 g of water can dissolve up to 190.5 g of sodium chloride. Since we only have 55 g of sodium chloride in the solution, we can conclude that all of the salt will dissolve into the water, since the solubility of sodium chloride at 80℃ is higher than the amount of sodium chloride in the solution.

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Answer: Why don't we feel the air pressing on us all the time?

Explanation:

Because air is a fluid, the weight of the air is transmitted to the palm of your hand and to the back of your hand at the same time. These forces cancel so that your hand overall feels no net force

Answer:the gravity in the atmosphere is pulling all the air so we can survive

Explanation:

Explanation:

H2O2: hydrogen peroxide.

hope it will help u ✌️

Answer:

Answer: CH₃ and C₂H₆ have same empirical formula.

Explanation:

it just compares in that it its the same

Answer:c2h2 and c6h6,

Explanation:

Answer:730

Explanation:

Answer:

A. A concept in geology that describes transitions and relationships among the tree main rock types.

D. A series of processes that create and transform the types of rocks in the Earth’s crust.

Explanation:

A and D are the best two answers from the choices below because they both correctly describe the rock cycle.

The rock cycle which according to Wikipedia is a basic concept in geology that describes transitions through geologic time among the three main types of rock;

1. Sedimentary,

2. Metamorphic and

3. Igneous rocks

A rock cycle can take very long time. It could be thousands or millions of years

Answer:

D)Gases usually weigh less than solids.

Answer:

D) Gases usually weigh less than solids

Explanation:

Gases don't have weight and solids do which automatically makes gases lighter because they don't have a mass like a solid.

-56 degree C  when converted to degree F will be equal to -68.8 degree F.

Degree is defined as a unit of measurement that is used to measure angles, and also longitude and latitude.

The Celsius scale start from 0 while the Fahrenheit scale start from 32 degree F which is equal to 0 degree C.

On the basic of the concept the formula is

F = 9/5 C + 32

Thus by using formula we get

F = 9/5(-56) + 32

F = 9(-11.2) + 32 = -100.8 + 32

F = -68.8

Thus, the correct answer of -56 degree C to °F is -68.8 degree F.

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Answer:

11 electrons

Explanation:

The atomic number of sodium is 11. This tells us that sodium has 11 protons and because it is neutral it has 11 electrons. The mass number of an element tells us the number of protons AND neutrons in an atom (the two particles that have a measurable mass).

In the given reaction CH3COOH → CH3COO^- + H+, the statement "CH3COO^- is a conjugate base" is true.The statement "CH3COO^- is a conjugate base" is true for the given reaction.

In the Brønsted-Lowry theory of acids and bases, an acid is a species that donates a proton (H+), while a base is a species that accepts a proton. In this reaction, CH3COOH donates a proton to form CH3COO^- and H+. The species that remains after the acid donates a proton is called the conjugate base.

In the reaction, CH3COOH acts as the acid by donating a proton, and CH3COO^- is the species that forms after the donation. Since CH3COO^- accepts the proton, it is considered the conjugate base of CH3COOH.

To determine whether a species is an acid or a base, we need to consider its behavior in a given reaction. In this case, CH3COOH donates a proton, making it the Brønsted-Lowry acid, while CH3COO^- accepts the proton, making it the conjugate base.

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Answer:

4.18 gm of SO3

Explanation:

64gm of S gives 128 gm of SO3

then

1 gm of S gives 128/64 gm of SO3

2.09 gm of S gives (128/64)*2.09 gm of SO3

ANS:4.18 gm of SO3

Answer:

1232 g of carbon dioxide are formed

Explanation:

As octane is being burned it would be combustion reaction.

writing the balanced equation:

C8H18 + 25/2 O2 →  9 H2O + 8 CO2

now stepping up mole ratio from the balanced equation:

                   moles of octane    :      moles of carbon dioxide

                               1                  :                    8

                                3.5             :                    X

X = 3.5 x 8 = 28

therefore when 3.5 moles of octane are burned in air 28 moles of carbon dioxide are evolved.

now in order to calculate the mass of CO2 formed

molar mass of CO2 = 12 + (16 x 2) = 44g

now calculating the mass of 28 moles:

                          moles : mass

                              1      : 44 g

                              28  :   X

X = 28 x 44 = 1232 g

1232 g of CO2 are formed

34%  is the percent by mass of nitrogen in the following fertilizers. It represents the amount of solute contained in a mass m of solution.

The mass percent might be used to denote a degree. Furthermore, it defines the element during a certain mixing. The solution mixture is frequently defined in terms of mass percentage.

It represents the amount of solute contained in a mass m of solution. The quantity of solutes can be stated in terms of mass or moles. We will study the mass percent formula using numerous solved numerical examples in this post.

molar mass of nitrogen = 28g

molar mass of urea= 60.06

mass percentage =(28/  60.06)×100 = 34%

Therefore, 34% is the percent by mass of nitrogen in the following fertilizers.

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A two-year degree program that emphasizes natural science, engineering, and mathematics is known as an associate of science (A.S.) degree.

This educational qualification provides a foundation in scientific principles and prepares students for further studies or entry-level positions in STEM-related fields. It offers a broad range of courses in disciplines such as physics, chemistry, biology, computer science, and mathematics.

An associate of science (A.S.) degree is a two-year undergraduate program that focuses on natural science, engineering, and mathematics. It is designed to provide students with a solid understanding of scientific principles, analytical skills, and problem-solving abilities.

The curriculum typically includes a combination of general education courses and specialized coursework in disciplines such as physics, chemistry, biology, computer science, and mathematics.

The associate of science degree offers a pathway for students interested in pursuing careers in STEM (Science, Technology, Engineering, and Mathematics) fields or continuing their education at a four-year college or university.

It provides a strong foundation in the core concepts and methodologies of the natural sciences, engineering principles, and mathematical reasoning. Graduates of an associate of science program may seek employment in various entry-level positions in industries such as healthcare, technology, research, or engineering.

Alternatively, they can transfer their credits to a four-year institution to pursue a bachelor's degree in a related field.

In summary, an associate of science (A.S.) degree is a two-year program that focuses on natural science, engineering, and mathematics. It offers a comprehensive curriculum that prepares students for further studies or entry-level positions in STEM-related fields.

This degree provides a solid foundation in scientific principles and analytical skills, enabling graduates to pursue diverse career opportunities or continue their education at higher levels.

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One of the isomers of C4H10O that is an alcohol is the 1-butanol or butyl alcohol:

Another of the alcohols that has the given formula is tert-butanol or tert-butyl alcohol:

The third isomer of C4H10O is 2-butanol:

And the last isomer is isobutanol or isobutyl alcohol:

To determine the stability of the given closed-loop transfer functions, we need to analyze the locations of the poles in the complex plane. If all the poles have negative real parts, the system is stable.

If any pole has a positive real part, the system is unstable. If there are poles on the imaginary axis or have zero real parts, further analysis is required.

a) Transfer function: 8Kc / (5S + 1)

The pole of this transfer function is at S = -1/5. Since the real part of the pole is negative, the system is stable.

b) Transfer function: 8Kc / (S^2 + 3S + 2)

The poles of this transfer function are at S = -1 and S = -2. Both poles have negative real parts, so the system is stable.

c) Transfer function: 8Kc / (S^3 + 6S^2 + 12S + 8 + 8Kc)

To determine the stability of this transfer function, we need to find the roots of the polynomial in the denominator. The characteristic equation is S^3 + 6S^2 + 12S + 8 + 8Kc = 0.

By analyzing the roots of the characteristic equation for different values of Kc, we can determine the stability. If all the roots have negative real parts for any value of Kc, the system is stable.

However, without a specific value for Kc provided, we cannot conclusively determine the stability of the system. The stability of the system will depend on the specific value of Kc and the locations of the roots of the characteristic equation. Further analysis is required to determine the stability.

In summary:

a) The system is stable.

b) The system is stable.

c) The stability requires further analysis as it depends on the specific value of Kc and the locations of the roots of the characteristic equation.

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The primary cause of recent global warming is believed to be increased burning of fossil fuels.

Fossil fuels such as coal, oil, and natural gas are used to produce energy for transportation, electricity, and heating. When these fuels are burned, they release carbon dioxide and other greenhouse gases into the atmosphere.Chemical reactions in the atmosphere that are driven by solar heat and increased levels of atmospheric pollution can also contribute to global warming, but they are not considered the primary cause.

Depletion of the rainforests can also have a negative impact on the climate, as they absorb carbon dioxide and release oxygen. The consequences of global warming are numerous and severe. They include rising sea levels, more frequent and intense natural disasters. It is essential that we take action to address this problem by reducing our dependence on fossil fuels and investing in renewable energy sources such as solar and wind power.

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Answer:

Explanation:

The mass of the volleyball can be found by using the formula

\(m = \frac{f}{a} \\ \)

f is the force

a is the acceleration

From the question we have

\(m = \frac{7}{10} = 0.7 \\ \)

We have the final answer as

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The signs of ΔH° and ΔS° must be positive and negative, respectively, for a reaction to be spontaneous at high temperatures but nonspontaneous at low temperatures.

The spontaneity of a reaction is determined by the Gibbs free energy change (ΔG). The Gibbs free energy change is related to the enthalpy change (ΔH) and entropy change (ΔS) of the system through the equation ΔG = ΔH - TΔS, where T is the temperature in Kelvin.

For a reaction to be spontaneous at high temperatures but nonspontaneous at low temperatures, the ΔH term should dominate at high temperatures, driving the reaction towards spontaneity. This implies that ΔH must be positive, indicating an endothermic reaction. This is because the positive ΔH term counteracts the negative TΔS term at high temperatures, allowing the reaction to proceed.

Similarly, the ΔS term should dominate at low temperatures, making the reaction nonspontaneous. For this to occur, ΔS must be negative, indicating a decrease in the system's entropy during the reaction. The negative ΔS term overwhelms the positive ΔH term at low temperatures, resulting in a positive ΔG and nonspontaneity.

Therefore, the signs of ΔH° and ΔS° must be positive and negative, respectively, for the described behavior of spontaneity at high temperatures and nonspontaneity at low temperatures.

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