what gas is produced in the reaction thus necessitating the need for loosely capped vials to allow it to escape?

After 6 half-lives, only 15.625 g of the initial 1000 g of cobalt-60 would remain in the sample.

The half-life of cobalt-60 is 5.27 years, which means that after every 5.27 years, half of the initial amount of the isotope would decay. So after 1 half-life, we would have 500 g remaining. After 2 half-lives, we would have 250 g remaining, after 3 half-lives we would have 125 g remaining, after 4 half-lives we would have 62.5 g remaining, and after 5 half-lives we would have 31.25 g remaining.

Now, we need to calculate how much would remain after 6 half-lives. So after 5 half-lives, we had 31.25 g remaining. After another half-life, we would have half of 31.25 g, which is 15.625 g remaining.

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The set of molecules is in the correct order from lowest to highest midpoint potential is 2) NADH > Coenzyme Q > cytochrome c > cytochrome oxidase.

The Transfer of the electrons in the direction of the increasing electrical potential. The electrons are generated from the Krebs cycle are transferred to NAD⁺. The electrons flow in the transport chain from the higher to the lower energy energy state. Therefore the order from lowest to highest midpoint potential is as follows :

NADH > Coenzyme Q > cytochrome c > cytochrome oxidase.

The energy releases the flow of protons through the proteins membrane.

This question is incomplete, the complete question is :

Which set of molecules is in the correct order from lowest to highest midpoint potential? (note, you do not need to have memorize values, just think logically how electrons flow through the ETC)?

1) Oxygen > pyruvate > cytochrome c > complex III

2) NADH > Coenzyme Q > cytochrome c > cytochrome oxidase

3) Complex IV > Complex III > Complex II > cytochrome c

4) Complex I > Complex II > Complex III > NADH

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Given; Volume of HCl solution = 0.20 L Concentration of HCl solution = 0.10 M Volume of diluted HCl solution = 550 mL

We need to find the concentration of the resulting HCl solution.

Concentration of HCl in initial solution = 0.10 M

Therefore, number of moles of HCl in initial solution = concentration x volume= 0.10 M x 0.20 L= 0.020 mol

Now, let's find the concentration of the resulting solution.

Number of moles of HCl in the resulting solution will remain same because we haven't added or removed any HCl from the solution.

Number of moles of HCl in the resulting solution = 0.020 mol

Volume of resulting solution = 0.20 L + 0.55 L = 0.75 L

Concentration of the resulting HCl solution = number of moles of HCl / volume of resulting solution= 0.020 mol / 0.75 L= 0.0267 M

Therefore, the concentration of the resulting HCl solution is 0.0267 M.

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Explanation:

sodium nitrate is most soluble at 90C.

Solubility is the ability to get dissolved. The salt of sodium is the most soluble salt at 90 degrees.

Solubility is the compound's or substance's ability to get dissolved in the solvent for the formation of the solution. It depends on several factors like hydration energy, temperature, pressure, and lattice energy.

The size of sodium is small, it has less lattice energy compared to the hydration energy and can get readily dissolved as it can create a sphere around other ions to form the solution.

Therefore, sodium salt is the most soluble at 90 degrees celsius.

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Newton's laws of motion are stated and explained below:

First law - an object remains in its state of motion in a straight line unless acted upon by an external force. This explains why moving objects are reluctant to stop and objects are rest are reluctant to move.

Second law - the change in the momentum of a body is directly proportional to the applied force and takes place in the direction of the applied force. This explains why acceleration increases with force.

Third law - action and reaction are equal and opposite.

This means that every force has a balancing force acting in the opposite direction

Newton's laws of motion are the laws that describe the observed phenomena of objects in motion.

The laws of motion are useful in determining the various features of motion in a straight line such as velocity, acceleration, impulse, and momentum.

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Answer:

D - A person's potential height is inherited, but they might not get enough nutrition to reach it.

Explanation:

Answer:

The atoms are vibrating in place.

Explanation:

One of the properties of an ionic substance is the possession of a crystalline structure. As Gerry observed the salt under a microscope, he discovered that it has a crystalline structure. Crystalline salts are all ionic in nature, hence the salt observed by Gerry is an ionic salt.

Solids containing a definite crystalline structure always has their particles vibrating in place. This is immediately evident as Gerry looks at the salt through a microscope.

Answer:

D.The atoms are vibrating in place

Explanation:

Answer:

The process to use this knowledge is explained as below:

Explanation:

1. Farmer should use an indicator to check the pH value of the soil of the field of the farm.

2. If the field or the farm has alkali soil add acid to reduce the pH value.

3. If the soil of the farm is acidic for the crop add alkali to increase the pH value.

4. It will be a neutralization reaction and changes the pH value of the farm.

5. Weather/leeching into the surrounding soil/plant or animal waste will lead to a change in pH value over time.

6. The pH value will need to be regularly monitored and adjusted.

Expanation:

Given the followin reactions we have to idenftify the oxidizing and reducing aget.

3 CH₃CHOHCH₃ + Cr₂O₇²⁻ + 8 H⁺ —> 3 (CH₃)₂CO + 2 Cr³⁺ + 7 H₂O

We can split this redox reaction in two half reactions.

3 CH₃CHOHCH₃ ----> 3 (CH₃)₂CO

Cr₂O₇²⁻ ----> 2 Cr³⁺

Let's balance the first half reaction, since it is an acidic meium, we can aDdd H+, molecules of waer and e-.

+ H8 H +⁺ + 8 e⁻

We have 24 atoms of H on the left and and 18 atoms of H of the right side. We have to add 8 H+ on the right side. We have 3 atoms of O on both sides. So we only have to add the electrons to balance the carges. )Also 8 on the right side.

Cr₂O₇²⁻ + 14 H⁺ + 6 e⁻----> 2 Cr³⁺ + 7 H₂O

In the second half reaction we have to add 7 molecules of water on the right side to balance the O atoms. We added 14 atoms of H on the right side, so we have to add 14 H+ on the left side. The total charge of the left side is +12 and the total charge of the right ide is is +6. We have to add 6 el- on the left side.

The two balanced half reactions are:

3 CH₃CHOHCH₃ ----> 3 (CH₃)₂CO + 8 H⁺ + 8 e⁻ Oxidation Half-reaction

Cr₂O₇²⁻ + 14 H⁺ + 6 e⁻----> 2 Cr³⁺ + 7 H₂O Reduction Half-reaction

If we pay attention to the equations we will see that Cr₂O₇²⁻ is gaining electrons, i is being reduced. So Cr₂O₇²⁻ is our oxidizing agent.

CH₃CHOHCH₃ is losing electrons, it is being oxidized. CH₃CHOHCH₃ is our reducing agent.

Answer:

Cr₂O₇²⁻: oxidizing agent.

CH₃CHOHCH₃: reducing agent.

The comparison of the potential energy of the cars if they are stopped at points A to point D is C. Potential energy is stored energy, point D is taller so it has more stored energy.

Potential energy is the energy held by an object as a result of its position relative to other objects, internal stresses, electric charge, or other factors. Because any object lifted from its resting position has stored energy, it is referred to as potential energy because it has the potential to do work when released.

Kinetic energy is the energy that an object has as a result of its movement. If we want to accelerate an object, we must apply force to it. Using force requires us to put in effort. After work is completed, energy is transferred to the object, and the object moves at a new constant speed.

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The roller coaster is your favorite ride! but the line is always long! having just studied potential and kinetic energy in physics, you evaluate the energy changes of the cars as they move on the tracks. Compare the potential energy of the cars if they are stopped at points A to point D.

A. Neither have potential energy.

B. The potential energy is the same.

C. Potential energy is greatest at point D.

D. Potential energy is greatest at point A.

Answer:

I have that same photo (I always where that combo lol)

Explanation:

In contrast to normal cells, cancer cells don't stop growing and dividing, this uncontrolled cell growth results in the formation of a tumor. Cancer cells have more genetic changes compared to normal cells, however not all changes cause cancer, they may be a result of it.

Answer: Can i have Brainliest & 100 POINTS

Explanation:

Answer:

Sodium hydroxide + ammonium chloride — Sodium chloride + ammonia gas + water

Explanation:

NaOH + NH4Cl — NaCl + NH3 + H2O

The following are matter properties and changes:

Matter can change in a variety of ways, including physical and chemical changes. Physical changes involve changes in the physical properties of matter, such as its shape, size, and state (solid, liquid, or gas). These changes do not result in a change in the fundamental composition of the matter. Examples of physical changes include melting of ice, boiling of water, and bending of a metal rod.

Chemical changes involve changes in the chemical composition of matter, resulting in the formation of new substances with different chemical properties. Chemical changes involve the breaking and formation of chemical bonds between atoms or molecules. Examples of chemical changes include burning of wood, rusting of iron, and digestion of food.

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The question is:

Matter-Properties and Changes

Use each of the terms below just once to complete the passage.

chemical density

Section 3.1 Properties of Matter

mass

properties

physical

substance

chemical

density

Matter is anything with (1)___________  and volume. A (2)___________  is a form of matter with a uniform and unchanging composition.

Substances have specific, unchanging (3)___________  that can be observed.

Substances have both physical and chemical properties. (4)___________ properties can be observed without changing a substance's chemical composition. Color, hardness, and (5)___________  are examples. Other properties cannot be observed without changing the composition of a substance. These are called (6)___________ properties. An example is the tendency of iron to form rust when exposed to air.

Label each property as either physical or chemical.

7. Chemical formula H₂O

8. Forms green carbonate when exposed to moist air

9. Remains unchanged when in the presence of nitrogen

10. Colorless

11. Solid at normal temperatures and pressures

12. Ability to combine with another substance

14. Liquid at normal temperatures and pressures

15. Boiling point is 100°C

16. Conducts electricity

17. Density is 1g/cm

Answer:

It changed by -7 degrees Celsius.

Explanation:

it became 6 degree celcius more

Answer:

this is called acceleration

hope it helps

Answer:

C. 170 g.

Explanation:

multiply given moles by the molar mass of ammonia.

Explanation:

No of moles=7.50×10²³/6.023×10²³=1.245 moles

Grams=1.245×32=39.84grams

so dfhhdjdjjfjfjjdjdjdj

Answer:167.9 g Ag

Explanation: 1 mol Cu + 2 mol AgNO3 = 2 mol Ag + 1 mol Cu(NO3)2

63.55 g Cu —> 2*107.688 g Ag

So 49.1 g Cu —> (49.1/63.55)*2*107.688 = 167.9 g Ag

The following statements on HPLC modes are true is more polar compounds elute first in normal-phase HPLC (Option E).

The liquid chromatography (HPLC) is a technique in analytical chemistry employed for the separation, identification, and quantification of elements. It is considered a highly sensitive method, and it works by separating the components in a mixture with the assistance of a solvent under high pressure.

There are two modes of HPLC: Reversed-Phase HPLC (RP-HPLC) and Normal-Phase HPLC (NP-HPLC). In RP-HPLC, a nonpolar stationary phase, such as C18, is used, and polar solvents, such as water, are used as mobile phases. Polar stationary phases, such as silica gel, are used in NP-HPLC, while nonpolar solvents, such as hexane, are used as mobile phases.

More polar compounds have a greater affinity for the polar stationary phase than less polar compounds, which have a higher affinity for the nonpolar mobile phase in NP-HPLC. As a result, less polar compounds elute first in normal-phase HPLC.

Thus, the correct option is E.

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From thermal comfort point of view, thick walled structures are beneficial in hot and humid climates is the statement that is true.The correct option is C.

Thick walled structures are beneficial in hot and humid climates from the thermal comfort point of view.How do thick walled structures help in hot and humid climates - In hot and humid climates, thick walls tend to absorb the heat present in the environment. This absorption helps to keep the interior of the structure cool.

Additionally, thick walls take more time to heat up and more time to cool down. Thus, in hot and humid climates, thick walls are a better choice than thin walls because they provide thermal comfort.

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Chloride ions outside the neuron would make it very difficult for a depolarization to occur.

In a normal resting state, the internal environment of a neuron has a net negative charge compared to the external environment.

This is known as the resting potential. During depolarization, this membrane potential switches from negative to positive very rapidly due to an influx of positively-charged cations (such as sodium) into the cell.

To interfere with this process, the ions outside of the neuron would have to shift the normal resting state so that the internal environment of the cell no longer has a net negative charge.

This will prevent the influx of cations that will cause depolarization. In order to do this, we would need to balance out the negative charge inside the cell with negative charge outside of the cell. In the list of options, chloride is the only negatively-charged ion. Therefore, the answer would be Chloride.

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Answer:

Because the gravitational force alters

Explanation:

Answer:

Metals react by losing electrons.  So, there is high reactivity due to lower attraction. Non-metals react by gaining electrons. So, there is high reactivity due to higher attraction.

Explanation:

Metals react by losing electrons. So, there is high reactivity due to lower attraction. Non-metals react by gaining electrons. So, there is high reactivity due to higher attraction. Also, electrons lost by metals transfer to the nonmetals. It is easier for the metals to lose their valance electrons and form cations rather than gaining electrons.

Metals do not hold on to or attract electrons while nonmetals hold on to or attract electrons.

In the periodic table, metals are found towards the left hand side of the table while nonmetals are found towards the right hand side of the table.

Electron affinity of elements increase from left to right across the period. Electron affinity refers to the ability of elements to attract or hold electrons. This ability increase steadily across the period.

Usually, the electron affinity values of nonmetals are very high showing that they easily hold on to and attract electrons while the electron affinity values of metals is very low showing that they do not easily hold on to and attract electrons.

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Roco being chemist preparing compounds, and ionic bonds. The answer of the questions are the given below:

1. Rocco is making bonds when he prepares the compounds.

Evidence:

2. The bonds in these compounds are ionic bonds.

Evidence:

3. Rocco may only be getting half as much magnesium compound because magnesium has a higher electronegativity than lithium, meaning that magnesium attracts electrons more strongly than lithium does. This means that the magnesium-bromine bond is stronger and therefore requires more energy to form. To increase his yield, Rocco could try to add more energy to the reaction, for example by using a higher temperature or longer reaction time.

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Describe the relationship between evaporation and a rainy climate in one or two sentences.

A liquid transforms into a gas during evaporation. It is easy to visualize when raindrops "vanish" from puddles on a hot day or when wet clothing dries in the heat. Instead of really dissipating in these situations, the liquid water is evaporating into a gas known as water vapor. Global evaporation takes place.

Evaporation occurs on surfaces. Because it happens when molecules with more kinetic energy from the top layer of the liquid escape into the air, evaporation is a surface phenomenon.

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2. The interaction involved in the B⁺-decay is known as beta decay.

3.  The conserved quantities in the reaction are:

The quark flavor is not a conserved quantity in the given reaction of B⁺-decay.

The B⁺-decay is a type of beta decay, specifically beta plus decay. In beta plus decay, a proton (p) decays into a neutron (n), emitting a positron (e+) and an electron neutrino (νe):

p → n + e⁺ + νe

2. The interaction involved in the B⁺-decay is the weak nuclear force. The weak force is responsible for processes involving the transformation of particles, such as the conversion of a proton into a neutron in this case.

The interaction involved in the B⁺-decay is known as beta decay. Specifically, the B⁺-decay refers to the decay of a positively charged (B⁺) meson, which is a type of subatomic particle.

3. The conserved quantities in the reaction are:

Conservation of electric charge: The total charge on both sides of the reaction is conserved. The proton (p) has a charge of +1, while the neutron (n) has no charge. The positron (e⁺) has a charge of +1, which balances out the charge.

Conservation of lepton number: The total lepton number is conserved in the reaction. The lepton number of the proton and neutron is 0, while the lepton number of the positron and electron neutrino is also 0. Hence, the lepton number is conserved.

Conservation of baryon number: The baryon number is conserved in the reaction. The baryon number of the proton is 1, and the baryon number of the neutron is also 1. Therefore, the total baryon number is conserved.

Regarding quark flavor, it is not conserved in the B⁺-decay. The decay process involves the transformation of a up-type quark (u) in the proton to a down-type quark (d) in the neutron. This change in quark flavor is allowed by the weak force.

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Explanation:

the tip of a growing plant contains special rapidly diving cells called apical meristem ,these cells are responsible for increase in the length of the plant . if we cut out these cells ,length growth of the plant will be stunned as these cells are not present anyplace else.

Answer:

3.38  Tablespoons

10.14 Teaspoons

0.21 U.S. Cups

0.18 Imperial Cups

0.20 Metric Cups

50.00 Milliliters

Explanation: