Inertia is based only on an object’s Question 1 options: mass net force velocity weight

The scientific theory of the matter of nature.

A solution may exist in any phase so your answer is D. any of the above

hope this helps :)

Final answer:

A solution can be made up of any combination of solids, liquids, and gases, including solid and liquid, two solids, or two liquids. Hence, the correct answer is (d) Any of the above.

Explanation:

Solutions can be composed of various states of matter. A solution is defined as a homogeneous mixture where the particles of one or more substances (the solute) are distributed uniformly throughout another substance (the solvent).

Considering these examples, the correct answer to the student's question is d. Any of the above.

Hey there!:

ka = kw/ kb

Ka = 1.0*10⁻¹⁴ / 1.8* 10⁻⁵

Ka = 5.56*10⁻¹⁰

Now Cl⁻ is spectator ion

NH⁴⁺ --->  NH3 + H⁺

Kb =  [NH⁴⁺ / [NH3] [H⁺]

at equilibrium  the concentration of products is taken as x each  and that of ammonium  ion will be  ( 0.10 -x )

5.56*10⁻¹⁰ = x² / [0.10 -x]

x =  7.54* 10⁻⁶ M

pH = - log [ H⁺ ]

pH = - log [ 7.54*10⁻⁶ ]

pH =  5.13

Answer C

Hope that helps!

The pH of a 0.10 M solution of NH4Cl is calculated using the Kb value of NH3 and the relationship between Ka, Kb, and Kw. By using the hydrolysis reaction equation and finding [H3O+], we can apply the formula pH = -log[H3O+] to get the pH value of 5.13.

The pH of a 0.10 M NH4Cl solution can be determined using the Kb value of NH3 and the relationship between Ka, Kb, and Kw (ion product for water). Ammonium chloride, NH4Cl, will associate in water to form NH4+ and Cl-. The NH4+ ion reacts with water in a hydrolysis reaction: NH4+ + H2O ⇌ NH3 + H3O+. This reaction has a Ka (acid dissociation constant) that can be calculated from the Kb (base dissociation constant) of NH3, using the relationship Kw=Ka x Kb (Kw is the ion product for water, 1.0 x 10-14 at 25°C). Therefore, Ka = Kw/Kb = 1.0 x 10-14 / 1.8 x 10-5 = 5.56 x 10-10.

This is a weak acid equilibrium, use ICE table and solve for [H3O+] using the equation Ka = [NH3][H3O+] / [NH4+]. After calculating the [H3O+], we can find the pH using the formula pH = -log[H3O+]. The correct pH value will be close to values between 4 and 6, thus the answer is 5.13.

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You didn't put an image. Sorry. Please put an image

The 'endpoint' in a titration refers to the measured volume of the titrant solution that results in a visible change, marking the completion of the reaction.

The 'endpoint' in a titration process refers to the measured volume of the titrant solution that causes a change in appearance, usually associated with a change in an indicator. A titrant, also known as a titrator, is a reagent of known concentration that is added from a burette to a solution of the analyte until the reaction is complete. This reaction completion, seen as a visible change, is the 'end point' of titration.

For Instance, in an acid-base titration, the endpoint is reached when the amounts of acid and base are stoichiometrically equal, and the pH of the solution suddenly changes. This process typically involves an indicator, such as phenolphthalein, that changes color at the endpoint.

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The 'end point' during a titration refers to the volume of the 'titrant' solution that leads to a noticeable color change in an indicator, signifying that the reaction has concluded.

In the process of a titration, the so-called 'end point' is the measured volume of the titrant solution (option B) that causes an observable change in appearance. This noticeable transformation usually takes the form of a change in an indicator. The end point of a titration is crucial as it signifies exactly when the reaction has reached completion.

For instance, let's consider a standard acid-base titration. In this case, the titrant (the solution in the burette) is gradually added to the analyte (the substance or solution being analyzed in the conical flask). An acid-base indicator, such as phenolphthalein, changes color to indicate the attainment of the end point, i.e., when stoichiometrically equivalent amounts of acid and base have reacted.

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A) The volume of the block is 125 cm³.

[tex]V = l^{3} = (\text{5.0 cm})^{3} = 125 \text{ cm}^{3}\\[/tex]

B) The density of the block is 4.5 g/cm³.

[tex]\text{Density} = \frac{\text{Mass}}{\text{Volume}} = \frac{\text{563.75 g}}{125 \text{ cm}^{3}} = \text{4.5 g/cm}^{3}\\[/tex]

Answer:

The values of Y are: 18, 9, 6, 3, 2, 1

Explanation:

It is given that X and Y are inversely related. This can be depicted mathematically as:

[tex]X \alpha \frac{1}{Y}[/tex]

i.e. as X increases the value of Y is expected to decrease.

(or) [tex]X =k* \frac{1}{Y}[/tex]

where k = proportionality constant which is given as 18

In terms of Y, the above equation becomes:

[tex]Y =k* \frac{1}{X}[/tex]

Based on the above equation the table can be filled as :

X     Y     K

1      18    18

2     9      18

3     6      18

6     3      18

9     2      18

18     1     18

Answer: x y k

1 18 18

2 9 18

3 6 18

6 3 18

9 2 18

18 1 18

Explanation:

The flow of heat from Earth's interior to the surface is estimated at terawatts (TW) and comes from two main sources in roughly equal amounts:

The option C is the correct answer.

Which is fig. I is homogeneous mixture while fig. II is heterogeneous mixture.

1. The answer is E.

2. I agree with your answers.

3. I also agree with your answers

Left Frame

The answer you have chosen is not correct. You have selected a physical property. Color is something that will not change as long as nothing chemical is done to the sample. If it is just going to sit there at room temperature in a flask and be admired, (particularly if the flask has a cork in it), then whatever you see is a physical property. The only one that isn't is E. When you burn something, there is a change. One chemical turns into something else. If you burn gasoline (for your car) then C8H18 + 13.5 02 ==> 8CO2 +  9H20 is the result.  That gasoline is not easily reversible. It has changed into something else (Water and Carbon Dioxide). That's Chemical.

Middle Frame

I've never encountered these terms before. Your two examples of extensive are correct. I'm not sure about the chemical reaction. I think it is intensive, but I wouldn't bet the farm on it. A chemical reaction is going to take place no matter how much is used. You could have too much sample or too much acid, but what happens does not depend on the amount. I think you are correct.

Answer: you have placed these in the right place.

Right frame.

All four are in the right category. Very nicely done.

Answer:

Metal: iron, silver, or gold. Made with metallic bonds. Is a Metallic solid.

Nonmetal: diamond. Made with covalent bonds. Is a Network Solid.

Metallic solids are formed by metal atoms through metallic bonding. Nonmetallic solids can be classified as ionic, covalent network, or molecular depending on the type of bond between nonmetal atoms.

There are two main types of crystalline solids formed from different structural units.

i. Metal atoms: Metallic solids are formed by metal atoms, which are held together by metallic bonding. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a 'sea' of delocalized electrons. Examples of metallic solids include crystals of copper, aluminum, and iron.

ii. Nonmetal atoms: Nonmetallic solids can be classified into different types, such as ionic solids, covalent network solids, and molecular solids. The specific way in which nonmetal atoms form a crystalline solid depends on the type of bond between the atoms. For example, in ionic solids, nonmetal atoms are held together by ionic bonds, while in covalent network solids, nonmetal atoms are linked by covalent bonds.

Final answer:

To find the formula of a hydrate, calculate the molar ratio of CuSO4 to H2O, which for the provided masses is approximately 8:1. Thus, the hydrate formula is CuSO4·8H2O, known as copper(II) sulfate octahydrate.

Explanation:

To determine the formula of a hydrate with given amounts of CuSO4 and H2O, we first need to calculate the molar ratio of the two substances. We do this by finding the number of moles of each substance and dividing them to get their ratio. The molar mass of CuSO4 is 159.61 g/mol, and the molar mass of H2O is 18.02 g/mol. Therefore:

Now we calculate the simplest ratio of moles of H2O to moles of CuSO4, which is 0.2997 mol H2O ÷ 0.0375 mol CuSO4 ≈ 8. Therefore, the compound is copper(II) sulfate octahydrate, and the chemical formula for this hydrate is CuSO4·8H2O.

Answer;

= 0.7698 M

Explanation and solution;

AgClO3 ionizes as follows:  

AgClO3 ---> Ag^+ + ClO3^-  

Moles AgClO3 dissolved ---> (0.393 mol/L) (0.925 L) = 0.424865 mol

From the chemical equation, one mole of AgClO3 dissolving yields one mole of ClO3^- in solution.

Moles ClO3^- = 0.424 865 mol

Similarly;

Mn(ClO3)2 dissolves as follows:

Mn(ClO3)2 ---> Mn^2+ + 2ClO3^-

Moles Mn(ClO3)2 dissolved ---> (0.283 mol/L) (0.685 L) = 0.413139 mol

From the chemical equation, one mole of Mn(ClO3)2 dissolving yields two moles of ClO3^- in solution.

Moles ClO3^- = 0.413139 mol x 2 = 0.826277 mol  

Total moles ClO3^- in solution;

0.826277 mol + 0.413139 mol = 1.239416 mol  

Total volume of solution ---> 0.925 L + 0.685 L = 1.61 L  

Molarity of ClO3^- ---> 1.239416 mol / 1.61 L = 0.7698 M

Answer: The concentration of chlorate ion is 0.467 M

Explanation:

To calculate the number of moles for given molarity, we use the equation:

[tex]\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}[/tex]     .....(1)

Molarity of [tex]AgClO_3[/tex] solution = 0.393 M

Volume of solution = 925 mL = 0.925 L      (Conversion factor:  1 L = 1000 mL)

Putting values in equation 1, we get:

[tex]0.393M=\frac{\text{Moles of }AgClO_3}{0.925L}\\\\\text{Moles of }AgClO_3=(0.393mol/L\times 0.925L)=0.364mol[/tex]

Molarity of [tex]Mg(ClO_3)_2[/tex] solution = 0.283 M

Volume of solution = 685 mL = 0.685 L

Putting values in equation 1, we get:

[tex]0.283M=\frac{\text{Moles of }Mg(ClO_3)_2}{0.685L}\\\\\text{Moles of }Mg(ClO_3)_2=(0.283mol/L\times 0.685L)=0.194mol[/tex]

The chemical equation for ionization of silver chlorate follows:

1 mole of silver chlorate produces 1 mole of silver ion and 1 mole of chlorate ion

Moles of chlorate ion = 0.364 moles

The chemical equation for ionization of magnesium chlorate follows:

[tex]Mg(ClO_3)_2\rightarrow Mg^{2+}+2ClO_3^-[/tex]

1 mole of magnesium chlorate produces 1 mole of magnesium ion and 2 moles of chlorate ion

Moles of chlorate ion = (2 × 0.194) = 0.388 moles

Moles of chlorate ion = (0.364 + 0.388) = 0.752 moles

Volume of solution = (925 + 685) = 1610 mL = 1.610 L

Putting values in equation 1, we get:

[tex]AgClO_3\rightarrow Ag^++ClO_3^-[/tex]0.752[tex]\text{Molarity of chlorate ion}=\frac{0.752mol}{1.610L}\\\\\text{Molarity of chlorate ion}=0.467M[/tex]

Hence, the concentration of chlorate ion is 0.467 M

Answer:

answer is 0.225 atm

Explanation:

was right on edge

1)

[tex]1.2 \; \text{g}[/tex]

There are [tex]75000/24000 = 25/8 = 3.125[/tex] half lives in a period of 75,000 years. The sample of plutonium-239 would thus expect a loss in mass that would results in a mass ratio of [tex](1/2)^{25/8}[/tex] which is the same as [tex]2^{-25/8} \approx 0.12 [/tex] relative to the initial mass. [tex]0.12 \times 10 \; \text{g} = 1.2 \; \text{g}[/tex] of plutonium-239 would thus remain in the initial [tex]10 \; \text{g}[/tex] sample after 75,000 years.

2)

[tex]1.5 \times 10^{3} \; \text{g}[/tex]

There are [tex]160/30 = 16/3 \approx 5.3[/tex] half lives in 160 years.

[tex]\text{mass remaining in 160 years} / \text{initial mass} = (1/2)^{160/30} \approx 2.5 \times 10^{-2}[/tex]

Thus

[tex]\text{initial mass} = 37 \; \text{g} / (2.5 \times 10^{-2})= {\text{initial mass} } \approx 1.5 \times 10^{3} \; \text{g}[/tex]

Some characteristics of Ionic compounds by Mimiwhatsup: brittle, high melting point, conducts electricity when molten or dissolved in water.

Answer : The correct options are, brittleness and high melting point

Explanation :

Ionic compound : Ionic compounds are the compounds which are formed when a metal cation bonded with non-metal anion. The metal cation and non-metal anion bonded with an electrostatic force of attraction.

The properties of ionic compounds are :

Ionic compounds are brittle and hard. They breaks easily into small pieces.

They have high melting point and boiling point.

They conduct electricity in liquid state not in solid state.

Hence, the brittleness and high melting point properties are the characteristic of ionic compounds.

Hey there!

pH = - log [ H⁺  ] = 3.52

[ H⁺ ] = 10^-pH

[ H⁺] = 10^ ( -3.52 )

[H⁺] = 3.02*10⁻⁴ M

[HA] =0.175 M

Therefore:

Ka = [ H⁺]* [A⁻] / [ HA]

Ka =  (3.02*10⁻⁴)² /  0.175

Ka = 9.1204*10⁻⁸ / 0.175

Ka = 5.2*10⁻⁷

Hope that helps!

By utilizing the given pH and molarity of the weak acid solution, we calculate the concentration of ionized and non-ionized acid. Then, we apply the equilibrium constant formula to calculate a Ka value of 5.22 x 10^-9.

The pH of the weak acid is given as 3.52. This equates to the concentration of [H+], which we can find using the formula [H+] = 10^(-pH). This gives us [H+] = 10^(-3.52) = 3.02 x 10^-4.

In a weak acid, [H+] = [A-] (the concentration of the deprotonated, or ionized, acid). Since we know the total concentration of the weak acid is 0.175 M, we can find the concentration of the un-deprotonated, or non-ionized, acid, [HA], by subtracting [H+] from this. So [HA] = 0.175 - 3.02 x 10^-4 = 0.1747 M.

Finally, knowing [H+], [A-], and [HA], we can calculate Ka, the equilibrium constant of the acid dissociation reaction, through the equation Ka = [H+][A-]/[HA]. Plugging in our numbers gives Ka = (3.02 x 10^-4)^2 / 0.1747 = 5.22 x 10^-9.

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Answer: a) 1.97 grams of carbon disulfide will remain after 37.0 days.

              b) 2.85 grams of carbon monosulfide will be formed after 37.0 days.

Explanation: The decomposition of carbon disulfide is given as:

                          [tex]CS_2(g)\rightarrow CS(g)+S(g)[/tex]

at t=0                    4.83g             0          0

at t=37 days        4.83 - x            x           x

here,

x = amount of [tex]CS_2[/tex] utilised in the reaction

This reaction follows first order kinetics so the rate law equation is:

[tex]k=\frac{2.303}{t}log\frac{A_o}{A}[/tex]

where, k = rate constant

t = time

[tex]A_o[/tex] = Initial mass of reactant

A = Final mass of reactant

a) For this, the value of

[tex]k=2.80\times10^{-7}sec^{-1}[/tex]

t = 370 days = 3196800 sec

[tex]A_o[/tex] = 4.83

A = 4.83-x

Putting values in the above equation, we get

[tex]2.8\times 10^{-7}sec^{-1}=\frac{2.303}{3196800sec}log\left(\frac{4.83}{4.83-x}\right)[/tex]

x = 2.85g

Amount of [tex]CS_2 [/tex] remained after 37 days = 4.83 - x

                                                                     = 1.97g

b) Amount of carbon monosulfide formed will be equal to "x" only which we have calculated in the previous part.

Amount of carbon monosulfide formed = 2.85g

Compounds with 2 ions bonded are called ionic compounds.

They are held together by the attractions between the positive and negative ions.

This question involves chemistry, specifically the changes in a chemical reaction. Determine the signs of potential changes for each element by considering if they are gaining or losing electrons. Apply this process carefully and consistently to all elements.

In the context of the question, you need to determine the signs of potential changes for each element, using the four points discussed together with Figure 21.26. This involves identifying and examining each element separately. For example, if an element is gaining electrons in a chemical reaction, it will exhibit a negative change in potential, due to the increase in negatively charged particles.

On the other hand, if an element is losing electrons (being oxidized), it will show a positive change in potential as the positively charged particles increase. Be sure to apply this analyzation carefully and consistently to all elements in your examination to ensure accurate results.

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Hey There:

First order  half life equation :

T 1/2  = ln ( 2 ) /K

T 1/2 = 0.693 / 3.40

T 1/2 = 0.204 s

Answer B

Answer: The half life of the decomposition reaction is 0.204 s

Explanation:

The equation used to calculate half life for first order kinetics:

[tex]t_{1/2}=\frac{0.693}{k}[/tex]

where,

k = rate constant of the reaction = [tex]3.40s^{-1}[/tex]

[tex]t_{1/2}[/tex] = half life of the reaction = ?

Putting values in above equation, we get:

[tex]t_{1/2}=\frac{0.693}{3.40s^{-1}}\\\\t_{1/2}=0.204s[/tex]

Hence, the half life of the decomposition reaction is 0.204 s

Answer:

1 = strontium

2 = technetium

3 = silver

Explanation:

Strontium is present in 2 group of periodic table. It is alkaline earth metal. It is most reactive element and can not found free in nature. it  is insoluble in water but react with water and form strontium hydroxide and hydrogen gas is also produced. It is radioactive element.

It is similar to the calcium and can incorporated into bones. The food rich with strontium is used to avoid the osteoporosis. It is found in leafy vegetables, grains, sea foods etc.

In given series strontium is highest in reactivity then technetium, while the technetium is more reactive than silver. The silver is less reactive as compared to both given elements.

Answer:

1. Strontium 2. Technetium 3. Silver

Explanation:

Answer:

A. The Substance Loses or Gains Heat

Explanation:

Plato 5/5

Answer:

1. A) Atoms gain valence electrons to form anions.

2. D) 50.94151 amu

3. D) elements in clouds of gas and dust in deep space.

4. D) silicon

Explanation:

Hello,

1. In this question, we consider that anions are chemical ions negatively charged, it means that they gain valence electrons to increase their oxidation states, thus the answer is: A) Atoms gain valence electrons to form anions.

2. In order to compute the required average atomic mass, we must consider the mass of each isotope and its percentage as shown below:

[tex]M=50amu*0.0025+50.944amu*0.9975\\M=50.94151amu[/tex]

Therefore answer is D).

3. In this case, the answer is: D) elements in clouds of gas and dust in deep space, as each element has its own atomic emission spectrum, therefore one can identify the spectra in order to determine which elements are present.

4. Since helium is obtained via the atomic fusion of two hydrogen atoms, nickel can be obtained via the atomic fusion of two silicon atoms since each silicon has 14 protons and electrons, thus, if we fusion them we obtain 28 protons and electrons, validating the existence of a nickel atom.

Best regards.

Within 60–90 minutes after a drink is consumed, all the alcoholic content has probably been absorbed into the body. This means that during this time frame, the majority of the alcohol present in the drink has entered the bloodstream and is distributed throughout the body.

When an alcoholic drink is consumed, the alcohol content is absorbed into the body primarily through the gastrointestinal tract. After ingestion, the alcohol passes through the stomach and enters the small intestine, where most of the absorption takes place.

The absorption process is relatively rapid, with the majority of the alcohol being absorbed within 60–90 minutes after consumption. However, the exact timing can vary depending on several factors, including the individual's metabolism, the type and strength of the drink, the presence of food in the stomach, and other individual characteristics.

During this absorption period, the alcohol molecules are transported across the lining of the small intestine and enter the bloodstream. From there, the alcohol is distributed throughout the body, including the brain, where it exerts its effects.

After the absorption process is complete, the body begins to metabolize and eliminate the alcohol. The liver plays a crucial role in metabolizing alcohol, breaking it down into less harmful byproducts that can be excreted from the body.

It's important to note that the effects of alcohol can vary and may continue to be felt even after the absorption process is complete. Factors such as the amount consumed, individual tolerance, and the rate of alcohol metabolism can influence the duration of alcohol's effects on the body.

Hence, the timeframe of 60–90 minutes represents a general estimate for the absorption of alcohol into the body, but individual variations can occur.

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Final answer:

After consuming a drink, all of the alcoholic content is typically absorbed into the body within 20-60 minutes. This process is influenced by various factors, including the presence of food and the drink's alcohol concentration.

Explanation:

The question addresses how quickly all of the alcoholic content of a drink is absorbed into the body after consumption. The absorption rate of alcohol into the body is significant because it affects how quickly a person feels the effects of alcohol and how soon the body can begin to metabolize and eliminate it. The correct answer to the question is 20-60 minutes after a drink is consumed, all of the alcoholic content has probably been absorbed into the body. This timeframe allows for the passage of alcohol through the stomach and into the bloodstream, with variations depending on factors like the presence of food in the stomach, the alcohol concentration of the drink, and individual metabolic rates.

2C4H10 + 8O2 → 8CO2 + 10H2O

There should be 8 molecules of oxygen which react with 2 molecules of butane to produce 8 molecules of carbon dioxide and 10 molecules of water.

Answer:

Explanation:

Answer:

2C4H10 + 13O2 → 8CO2 + 10H2O

Explanation:

2C4H10 + O2 → CO2 + H2O

There are 8 carbon atoms on the left side of the equation thus , there should be equal number of carbon atoms on the right side

So, if we balance carbon atoms only, the new eqation becomes

2C4H10 + O2 → 8CO2 + H2O

Now carbon atoms are balance but there are 20 , hydrogen atoms on the left side but 2 atoms only on the right side. So the new equation after balancing hydrogen atom becomes

2C4H10 + O2 → 8CO2 + 10H2O

Now both carbon and hydrogen atoms are balanced but oxygen atoms are pending. There are 26 atoms of (O) on the right side , while 1 molecule of (O2)

So the balanced equation would be  

2C4H10 + 13O2 → 8CO2 + 10H2O

The answer is (B).

Each Carbon atom can bond with several other carbon atoms because of how many valence electrons it has.

Carbon atom has four valence electrons, so each single carbon can form four bonds in total either with other carbons or some other atoms. So, a chain can be formed with carbon linked to another and then so on.

The bond between Carbon to another Carbon is strong and stable so the compounds tend to be stable enough to exist.

Answer:

B.  Each carbon atom can bond with several other carbon atoms because of how many valence electrons it has.

Explanation:

Carbon atom has four valence electrons, so each single carbon can form four bonds in total either with other carbons or some other atoms. So, a chain can be formed with carbon linked to another and then so on.

The bond between Carbon to another Carbon is strong and stable so the compounds tend to be stable enough to exist.

Silicon atoms fuse to form nickel in stars. Emission spectra help in detecting elements in deep space. The isotopic mass of vanadium-50 is approximately 49.944 amu.

Stars, including the sun, produce energy by fusing helium and hydrogen together through a process known as nuclear nucleosynthesis.

As stars consume their helium, their temperature escalates, allowing for heavier elements to undergo fusion.

The fusion of two atoms of silicon can yield nickel, which is the heaviest element that can be produced through fusion due to the net energy requirements.

Emission spectra are used by scientists to detect elements in clouds of gas and dust in deep space.

The isotopic mass of vanadium-50 can be obtained using the formula: (mass of isotope × abundance of isotope / total abundance).

Given that vanadium-50 has an abundance of 0.250% and vanadium-51 has an abundance of 99.750% with a mass of 50.944 amu, the isotopic mass of vanadium-50 is approximately 49.944 amu.

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