Energy transferred when an object is moved by a force results in _______ being done on that object.

Blood has a normal pH of 7.41, which is equal to 1.0 x 10-7 M for [H+] and 1.0 x 10-7 M for [OH-]. With a pH of 15.3, [H+] = 1.0 x 10-15 M and [OH-] 1.0 x 10-15 M c, respectively. [H+] = 10-1.0 = 1.0 x 10-1 M and [OH-] = 10-1.0 = 1.0 x 10-1 M d. pH = -1.0. [H+] = 10-3.2 = 1.0 x 10-3 M and [OH-] = 10-3.2 = 1.0 x 10-3 M are the pH values.

e. With pOH = 5.0, [H+] = 105 M and [OH-] = 105 M, respectively. [H+] = 10-9.6 = 1.0 x 10-9 M and [OH-] = 10-9.6 = 1.0 x 10-9 M, respectively, for pOH = 9.6. The concentrations of hydrogen ions (H+) and hydroxide ions (OH-) in a solution are represented by the pH and pOH, respectively.

pH is While pOH is the negative logarithm of the concentration of hydroxide ions, pH is the negative logarithm of the concentration of hydrogen ions. We may use the equations [H+] = 10 pH and [OH-] = 10 pOH to get the [H+] and [OH-] for a specific pH or pOH. For instance, if a solution's pH is 7.41, then [H+] and [OH-] are each equal to 1.0 x 10-7 M and 10-7.41, respectively.

Similar to this, if a solution's pOH value is 9.6, then its [H+] and [OH-] concentrations are both equal to 10 9.6 and 1 x 10-9 M, respectively.

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The volume of the balloon is 3.788l.

Boyle's law:

Boyle's law state that the volume of a gas at constant temperature varies inversely with the pressure exerted on it.

The formula of Boyle's law:

P1V1 = P2 V2

P1 = 1.334atm

V1 = 1.88l

P2 = 0.662 atm

Putting the values in the equation we have:

1.334 × 1.88 = 0.662 × V2

V2 = 2.51/ 0.662

    = 3.788 l

Therefore the volume is 3.788l

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Total time of the archeological sample is 5730×3 or 17190 years.

Civilization describes a complex way of life that came about as people by the  began to develop networks of urban of settlements. The earliest and civilizations developed between 4000 and 3000 B.C.E., when it is  the rise of agriculture and trade allowed people to have surplus of the food and economic stability.

The half life of a decaying radioactive element is the time taken for the sample of atom to decay to 50 percent of the original mass

Here 12.5 percent of sample remains

Means first half life to =50 percent

Then second half life to= 25 percent

Then third half life to= 12.5 percent

So three half life taken

Here carbon 14 half life period is 5730 years

So total time of the archeological sample is 5730×3 or 17190 years

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Food scientists work with the chemistry of ingredients in food to improve the quality and stability of the food. They study the use of chemical flavors, thickening agents, stabilizers and preservatives and apply their knowledge to improve existing food products and develop new ones.

GUYS IF YOU GET THE THING ABOUT THE CHILD PERV I WOULD WATCH OUT BUT SOME OF THEM ARE JUST DOING IT TO GET FREE POINTS SO REPORT THEM!! :)

Pls brainliest! :)

Answer:

The scale reads the tension in the string. The tension in the string is 100 N. This is the force the string must exert up on either of the 100-N weights at either end of the string.

Nothing is moving, nothing is accelerating, so the net force on the spring is zero. Likewise, the net force on either of the 100-N weights is also zero. But that is another question. The spring scale does not measure the net force. The spring scale simply measures the tension, the magnitude of the force exerted by the string.

Explanation:

Based on the data provided,  the rate of the given reactions are:

a. reaction rate =  0.0132 M/sec

b. rate of change of [H⁺] = 8.8 * 10⁻³ M/sec

Reaction rate = change in concentration of reactant or product/ time taken

Change in concentration of I⁻ = 1.000 M - 0.868 M= 0.132

time taken = 10 s

reaction rate = 0.132/10

Rate of reaction = 0.0132 M/sec

From the equation of the reaction 3 moles of I⁻ are used up for every 2 moles of H⁺

Hence, the rate of change of [H⁺] = 0.0132 M/sec * 2/3

rate of change of [H⁺] = 8.8 * 10⁻³ M/sec

Therefore, the rate of the given reactions are:

a. reaction rate =  0.0132 M/sec

b. rate of change of [H⁺] = 8.8 * 10⁻³ M/sec

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The balanced equation for the decomposition of water (H₂O) can be represented as follows 2 H₂O(l) -> 2 H₂(g) + O₂(g)

This equation indicates that when water molecules undergo decomposition, they break down into hydrogen gas (H₂) and oxygen gas (O₂).Water, in this case, undergoes decomposition to give hydrogen and oxygen. This reaction can be induced by the electrolysis of water.In the above chemical equation, it is clear that two water molecules decompose to produce two molecules of hydrogen gas and one molecule of oxygen gas.

Since the law of conservation of mass has to be followed, the number of atoms of each element on the reactant side has to be equal to the number of atoms of each element on the product side. Therefore, the equation is said to be balanced.

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Answer:Cost benefit analysis

Explanation:

Production, distribution, exchange, consumption, saving, and investment of economic resources are all a part of economic decisions. Public and private objectives. Economic choices are made in order to further the interests of both the general public and private persons and organizations (public goals).

The purchase of a device at a specific price is a straightforward illustration of an individual economic decision. This person will have to decide whether it is worthwhile to use his or her limited financial resources to purchase a device. A family's financial decision is virtually analogous, except that it involves more people this time.

The laws of supply and demand are used in the marketplace to guide economic decisions. The term describes the process of making an economic decision as a cost-benefit analysis.

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Answer:

6.     True or False. The arrow labeled C represents a transfer of chemical energy to mechanical energy. Explain why this is true or false.

a.     This is __False_____ because: Factory uses Mechanical energy with is converted to chemical energy.

7.     True or False. The arrow labeled A represents a transfer of solar energy to chemical energy. Explain why this is true or false.

a.     This is __True_____ because:  Solar energy from the sun is first, then a chemical reaction makes food for the plant.

Explanation:

Change up the spelling, put it in your own words, I didn't use advanced grammar, don't copy and paste, don't get a 0.

Answer:

\(\tt{ \green{P} \orange{s} \red{y} \blue{x} \pink{c} \purple{h} \green{i} e}\)

Answer: Because the gas is collected over water, it is not pure but is mixed with vapor from the evaporation of the water. Dalton’s law can be used to calculate the amount of the desired gas by subtracting the contribution of the water vapor.

In order to solve a problem, it is necessary to know the vapor pressure of water at the temperature of the reaction (see Table below). The sample problem illustrates the use of Dalton’s law when a gas is collected over water.

Vapor Pressure of Water (mmHg) at Selected Temperatures (°C)

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70

4.58 6.54 9.21 12.79 17.54 23.76 31.82 42.18 55.32 71.88 92.51 118.04 149.38 187.54 233.7

Sample Problem: Gas Collected by Water Displacement

A certain experiment generates 2.58 L of hydrogen gas, which is collected over water. The temperature is 20°C and the atmospheric pressure is 98.60 kPa. Find the volume that the dry hydrogen would occupy at STP.

Step 1: List the known quantities and plan the problem.

Known

Unknown

The atmospheric pressure is converted from kPa to mmHg in order to match units with the table. The sum of the pressures of the hydrogen and the water vapor is equal to the atmospheric pressure. The pressure of the hydrogen is found by subtraction. Then, the volume of the gas at STP can be calculated by using the combined gas law.

Step 2: Solve.

Now the combined gas law is used, solving for

, the volume of hydrogen at STP.

Step 3: Think about your result.

If the hydrogen gas were to be collected at STP and without the presence of the water vapor, its volume would be 2.28 L. This is less than the actual collected volume because some of that is water vapor. The conversion using STP is useful for stoichiometry purposes.

Summary

The vapor pressure due to water in a sample can be corrected for in order to get the true value for the pressure of the gas.

Review

Why is gas collected over water not pure?

Why would we want to correct for water vapor?

In a lab, 2.20 L of gas is collected over water at a temperature of 30°C and a total pressure of 735.43 mmHg. Find the volume that the dry nitrogen of gas would occupy at STP.

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Use the resource below to answer the questions that follow.

A battery is a device that converts chemical energy into electrical energy through a process known as an electrochemical reaction.

When a battery is connected to a circuit, the electrochemical reaction causes a flow of electrons from the anode to the cathode, generating an electric current that can power a device.

The metal chosen for the anode must be capable of losing electrons easily, while the metal chosen for the cathode must be capable of accepting electrons. The choice of metals can also affect the voltage and capacity of the battery, as well as its overall efficiency.

In general, the metals used in a battery should have a large difference in their electronegativity values, which determines how easily an atom can attract electrons. Common metals used in batteries include zinc, lithium, nickel, and cadmium.

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All sterilizing methods, including steam, hydrogen peroxide, and ethylene oxide, should employ chemical indicators.

Any procedure that eliminates, eradicates, or renders inactive any life forms—particularly microbes like fungi, bacteria, spores, and unicellular eukaryotic organisms—present in or on a given surface, object, or fluid is referred to as sterilization.

Despite the fact that there are several physical and chemical procedures, just a handful are essential for effectively sterilizing equipment. Having said that, there are currently three main categories of sterilizing procedures used in science. They are sterilizing using ethylene oxide, dry heat, and steam (EtO).

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Lowers your stomach ph from 2.0 to 1.8. aspirin only absorbs in its protonated state and has a pka of 3.0,very small percentage of the aspirin will be absorbed  given a stomach ph of 1.8.

The first step is to determine the ratio of protonated to deprotonated aspirin in the acidic environment of the stomach. This can be done using the Henderson-Hasselbalch equation, which relates the pH, pKa, and the ratio of protonated to deprotonated forms of a weak acid:

pH = pKa + log([A-]/[HA])

[HA]/[A-] = 10^(pH - pKa) = 10^(1.8 - 3.0) = 0.014

Therefore, only a very small percentage of the aspirin will be absorbed in its protonated form, and the majority will remain in the deprotonated form and be excreted from the body. This may decrease the effectiveness of the aspirin as a pain reliever or anti-inflammatory agent.

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Heat Energy is required to bring pure liquid water from 0 degrees celsius to liquid water at 50 degrees celsius is 2,71,600J

There are three heats to consider:

q1 = heat required to melt the ice to water at 0.00 °C.

q2 = heat required to warm the water from 0.00 °C to 50 °C.

q1=mΔHfus=500 g×334 J/g

= 1,67,000 J

q2=mcΔT=500g × 4.184 J/°C g × 50°C

= 1,04,600 J

Total Heat Energy required = q1+q2

= 1,67,000 J + 1,04,600 J = 2,71,600J

The movement of microscopic particles known as atoms, molecules, or ions in solids, liquids, and gases produces heat energy. Heat energy can go from one item to another. Heat is the transfer or movement of energy caused by a temperature differential between two objects.

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The balanced redox equation in acidic solution is: \(\mathrm{Sn} + 4\mathrm{HNO}_3 + 3\mathrm{H}_2\mathrm{O} + 8\mathrm{H}^{+} \rightarrow \mathrm{Sn}\mathrm{O}_2 + 2\mathrm{NO}_2 + 12\mathrm{H}_2\mathrm{O} + \mathrm{NO}_3^{-}\). The reaction involves the transfer of electrons between species and results in the oxidation of tin from 0 to +4 and the reduction of nitrogen from +5 to +4.

To balance the equation, we need to ensure that the number of atoms of each element is equal on both sides of the reaction. Let us start by balancing the tin atoms. The reaction has one tin atom on the left side and one on the right side, so it is already balanced. Next, let us balance the nitrogen atoms. There are three nitrogen atoms on the left side (in \(\mathrm{HNO}_3\)) and two on the right side, so we need to add one more nitrogen atom to the right side. This can be done by adding a nitrate ion to the right side:

\(\mathrm{Sn} + 4\mathrm{HNO}_3 \rightarrow \mathrm{Sn}\mathrm{O}_2 + 2\mathrm{NO}_2 + 2\mathrm{H}_2\mathrm{O} + \mathrm{NO}_3^{-}\)

Now, let us balance the oxygen atoms. There are 12 oxygen atoms on the right side and 12 on the left side. The nitrate ion on the right side adds three more oxygen atoms, so the total number of oxygen atoms on both sides is now 15. To balance the oxygen atoms, we can add 3 water molecules to the left side:

\(\mathrm{Sn} + 4\mathrm{HNO}_3 + 3\mathrm{H}_2\mathrm{O} \rightarrow \mathrm{Sn}\mathrm{O}_2 + 2\mathrm{NO}_2 + 4\mathrm{H}_3\mathrm{O}^{+} + \mathrm{NO}_3^{-}\)

Finally, let us balance the hydrogen atoms. There are 4 hydrogen atoms on the left side (in \(\mathrm{HNO}_3\)) and 12 on the right side. To balance the hydrogen atoms, we can add 8 protons (H+) to the left side:

\(\mathrm{Sn} + 4\mathrm{HNO}_3 + 3\mathrm{H}_2\mathrm{O} + 8\mathrm{H}^{+} \rightarrow \mathrm{Sn}\mathrm{O}_2 + 2\mathrm{NO}_2 + 12\mathrm{H}_2\mathrm{O} + \mathrm{NO}_3^{-}\)

Now the equation is balanced in terms of both atoms and charge. We can verify this by checking the number of each element and the total charge on both sides of the equation.

The balanced equation is:

\(\mathrm{Sn} + 4\mathrm{HNO}_3 + 3\mathrm{H}_2\mathrm{O} + 8\mathrm{H}^{+} \longrightarrow \mathrm{Sn}\mathrm{O}_2 + 2\mathrm{NO}_2 + 12\mathrm{H}_2\mathrm{O} + \mathrm{NO}_3^{-}\)

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compound z has a mw of 100 g/mol.  partner weighed 250 grams of compound z  dissolved it in water to a final volume 1 liter, concentration of the solution expressed as a percentage by weight  M = 2.5 mol /L.

M = n / V

M = 2.5 mol / 1 L

Concentration is the ratio of a constituent's abundance to the mixture's overall volume. Mass, molar, number, and volume concentrations are among the different categories of mathematical description, which refers to the act or process of concentrating. 3. anything that is focused. 4. the strength of a solution, specifically the quantity of dissolved material in a given volume of solvent, is often represented in moles per cubic metre or cubic decimetre (mL). a solution is a particular sort of homogeneous mixture made up of two or more substances. A solution is a homogenous mixture of two or more components in which the particle size is smaller than 1 nm. A solute is a material dissolved in a solvent in such a mixture.

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a. Oxygen is provided. Carbon dioxide is removed.

In the atmosphere of a spacecraft, oxygen is provided to the astronauts to breathe and carbon dioxide is removed from the air they exhale.

This is typically done through the use of a life support system that includes equipment for removing carbon dioxide and replenishing the air with oxygen. In addition, the system may also remove other gases such as water vapor and trace contaminants to maintain a healthy and breathable atmosphere inside the spacecraft.

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Conversion of 7g/dm³ of H₂O to 0.21 mol/dm³ is

Conversion is the act or process of changing something into a different state or form

Here given data is

7g/dm³ of H₂O we have to convert it into mol/dm³ = ?

Then divide by the relative formula mass

We get  H₂O then H = 1 here 2 hydrogen = 1×2 = 2 and 1 oxygen i.e 1×16 = 16 =

2×16 = 32

So,  7g/dm³/32

= 0.21 mol/dm³

7g/dm³ of H₂O to 0.21 mol/dm³

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Answer: 4

Explanation:

Explanation:

Compound: a substance that is made up of more than 1 type of atom bonded together Example: H2O

Mixture: combination of two or more elements or compounds not chemicaly bonded together. example: Sugar and salt in one container

elements pure substance of an atom. Example: hydrogen

If the reaction proceeds to 65% completion, 13.95 grammes of ammonia are needed to make 14.4 grammes of HCN.

The balanced chemical equation for the reaction between propane and ammonia to produce hydrogen cyanide and hydrogen gas is:

C₃H₈ + NH₃ → HCN + 3H₂

According to the equation, one mole of NH₃ produces one mole of HCN. Therefore, to determine the number of moles of NH₃ required to produce 14.4 g of HCN, we need to convert the given mass of HCN into moles:

14.4 g HCN x (1 mole HCN/27.03 g HCN) = 0.5331 moles HCN

Since the reaction runs to 65% completion, the actual number of moles of HCN produced will be:

0.5331 moles HCN x 100/65 = 0.8202 moles HCN

Therefore, the number of moles of NH₃ required to produce this amount of HCN will be the same:

0.8202 moles NH₃

To convert moles of NH₃ to grams, we can use the molar mass of NH₃:

0.8202 moles NH3 x 17.03 g NH₃/mole = 13.95 g NH₃

Therefore, approximately 13.95 grams of ammonia are required to produce 14.4 g of HCN if the reaction runs to 65% completion.

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Calculate electrons

Total electrons=10+2=12

The element is Magnesium with symbol Mg as atomic no is 12

Additional:-

M:-

Excited state of magnesium

The pH change when 0.102 mol KOH is added to 1.00 l of a buffer solution that is 0.486 m in HNO₂ and 0.337 m in NO₂⁻ is 0.21.

pH = pka  +  log [base] / [acid]

pH = 3.37 + log [0.337] / [0.486]

pH = 3.21

after adding 0.102 mol of KOH, new concentrations are :

[base] = (0.337 mol /L × 1 L+ 0.102 mol) / 1 L = 0.439 M

[acid] =  (0.486 mol /L × 1 L- 0.102 mol) / 1 L = 0.384 M

pH = 3.37 + log [0.439] / [0.384]

pH = 3.42

ΔpH = 3.42 - 3.21 = 0.21

Thus, The pH change when 0.102 mol KOH is added to 1.00 l of a buffer solution that is 0.486 m in HNO₂ and 0.337 m in NO₂⁻ is 0.21.

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Answer:

35.4 % left

Explanation:

6.75  / 4.5   = 1.5  half lives

1/2 ^(1.5) = .354      or   35 .4 %

Answer:

Explanation:

To find [H+] in the solution we must first find the pH

That's

pH = - log[H+]

pH + pOH = 14

pOH = 0.253

pH = 14 - 0.253

pH = 13.747

Since we've found the pH we can now find the [H+] in the solution

We have

pH = - log[H+]

13.747 = - log[H+]

Take antilog of both sides

We have the final answer as

\([H+] = 1.79 \times {10}^{ - 14} M\)

Hope this helps you

Answer:

Okay so we know that pOH + pH = 14, so if pOH is 0.253 the pH would be 13.747.  

And pH = -log [H+], so [H+] = 10^(-pH) -->This is just the antillog...  

so [H+] = 1.791e-14, which would make sense for the strongly basic solution (so B is the correct answer)  

Hope this helps...

For the net charge to be +3,the mystery charge should be is -2 and net force is towards left.

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Answer:

electrolytic reaction; oxygen and hydrogen combine to form water, producing electrical energy and releasing heat.

Explanation:

Answer:

0.25M

Explanation:

Since molarity is defined as the amount of substance in 1 liter of a solution, and amount in chemistry refers to the number of moles, molarity can be found using the equation below:

Molarity= number of moles ÷ volume in liters

Given: number of moles= 2

Volume= 8L

∴ Molarity of NaCl

= 2 ÷8

= 0.25M