50 Points (Brainliest too)! Please help!
1. In detail, explain what transmutation is.
2. In one to two sentences, explain what an alpha particle is.
3. Explain the difference between a chemical equation and a nuclear equation.
4. What is the relationship between the atomic number and the mass number of a 5. nucleus?
Please help me understand these!! I'm really confused!

The combination of alloys 1 and 5 would give the largest temperature-sensitive deflection for your bimetallic temperature sensor design. Thus, the correct option is C.

A bimetallic temperature sensor works by using two different metals with different thermal expansion coefficients that are bonded together. When the temperature changes, one metal will expand more than the other, causing the bond to bend. To achieve the largest temperature-sensitive deflection, it is important to use two metals with the largest possible difference in thermal expansion coefficients.

In this case, alloys 1 and 5 have the largest difference, with thermal expansion coefficients of 25 m/m-K and 2 m/m-K respectively, resulting in the largest deflection and making it the most suitable combination for a temperature sensor design.

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Answer:

protons and electrons

Explanation:

Answer:

C. Hl

Explanation:

I just looked it up on the internet lol

Answer:

P(CH₂Cl₂) = 178.5torr

P (CCl₄) = 58.2 torr

Explanation:

Assuming ideal behavior, the partial pressure is equal to mole fraction times vapor pressure of the pure substance. Partial pressure is:

Partial pressure CH₂Cl₂= X(CH₂Cl₂) * P°(CH₂Cl₂)

Partial pressure CCl₄ = X(CCl₄) * P°(CCl₄)

Mole fraction of both compounds is:

X(CH₂Cl₂) = 1.80mol / (1.80mol + 1.75mol) = 0.507

X(CCl₄) = 1 - 0.507 = 0.493

Solving, pressure of the solution:

P(CH₂Cl₂) = 0.507 * 352torr = 178.5 torr

P (CCl₄) = 0.493 * 118torr = 58.2 torr

Explanation

Given:

14 carat gold ring contains 58% (or 0.58 gram) gold

We know that 14 carat = 2.8 grams

100 g gold ring = 58 g of gold

Answer

58g gold is measured (2SFs), and 100 g gold is exact.

Answer:

See explanation

Explanation:

From;

0.693/t1/2 = 2.303/t log (Ao/A)

Where;

t1/2 = half life of the sodium-24

t = time taken

Ao = initial activity of sodium-24

A= activity of sodium-24 at time t

a)

0.693/15 = 2.303/15 log (14/A)

0.0462 = 0.1535 log (14/A)

0.0462/0.1535 =  log (14/A)

log (14/A) = 0.0462/0.1535

14/A = Antilog(0.3)

14/A= 1.995

A = 14/1.995

A = 7.0 mCi

b)

0.693/15 = 2.303/30 log (14/A)

0.0462 =0.0768 log(14/A)

0.0462/0.0768 =log (14/A)

(14/A) =Antilog (0.6)

A = 14/Antilog (0.6)

A = 3.5 mCi

c)

0.693/15 = 2.303/45 log (14/A)

0.0462= 0.0512 log (14/A)

log (14/A) = 0.0462/0.0512

log (14/A) = 0.9

(14/A) = Antilog (0.9)

A= 14/Antilog (0.9)

A = 14/7.9

A = 1.77  mCi

d)

2.5 days = 2.5 * 24 hours = 60 hours

0.693/15 = 2.303/60 log (14/A)

0.0462 = 0.03838 log (14/A)

log (14/A) = 0.0462/0.03838

(14/A) = Antilog(1.2)

A= 14/Antilog(1.2)

A = 14/15.8

A = 0.886 mCi

Note that activity (A) decreases as time increases.

The weight of an alcohol with a density of 0.8g/ml and volume of 50ml is 40g.

HOW TO CALCULATE WEIGHT:

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According to the explanation given in the previous session, for this question we have:

4 Fe + 3 O2 -> 2 Fe2O3

The tip to find oxidation number is always rely on "easy" elements, like halogens or Oxygen, which will most of the times have -2 as its oxidation number. With that information in mind we have 50% of the answer already, since Oxygen will form compounds carrying a -2 charge

Oxygen will be reduced, it will also be the oxidizing agent, oxidation number = -2 and the change in oxidation number will be 0 -> -2.

The rest of the answer is easy now

Iron will be oxidized, becoming the reducing agent, oxidation number must match the oxidation number for Oyxgen, therefore it will be = +3, change in oxidation number 0 -> +3

Answer:

check your question it's not correct

Answer:

Okay so I have no idea what the options are but a chemical change is when you modify the substance itself.

LIKE....

burning paper

metal rusting

fireworks going off

Answer:

D. Uses sunlight to create glucose (sugar)

Explanation:

The function of the chloroplast is that it uses sunlight to create glucose.

The chloroplast allows for light to be trapped which is used for the synthesis of glucose from carbon dioxide and water.

The chloroplast is a rich in a pigment called the chlorophyll. This chlorophyll is a green pigment which allows for the trapping of solar energy

This solar energy is used to carryout the photosynthetic reaction.

The reaction between A and B is reactant favored. This  inference can be drawn from the graph.

Chemical reactions occur all around us, including in our body's digestion of food and the creation of the sunlight's light. Understanding both chemical and physical alterations is crucial before starting any chemical reactions. The best illustration of a chemical and physical alteration is a burning candle. The reaction between A and B is reactant favored. This  inference can be drawn from the graph.

Therefore, the correct option is option A.

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His hypothesis was that b) maggots come from eggs laid by flies.

Redii demonstrated that maggots do not spontaneously generate from rotting meat. He placed three jars containing rotting meat, each covered with different kinds of material. One jar was covered with a fine cloth, one with gauze, and one with cork.

Flies were observed landing on all three jars of meat, but after eight days, only the jar covered with the gauze had maggots on the meat. Redii observed the maggots on the meat and concluded that they had not spontaneously generated, but had come from the eggs of the flies that had landed on the meat.

From this, he concluded that maggots only form on meat that is exposed to the air, and not on meat that is sealed in a jar. This showed that it was not "spontaneous generation" that was creating the maggots, but rather that they were being laid by flies.

This is because he put meat in different locations and found that maggots only appeared where there were flies.

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Answer:

they remain liquid

Explanation:

because liquid in liquid mostly doesn't have any affect on the state of the matter

as,

water added to juice

remains liquid

Answer:1. metyletevinyl

4. (Z)-3-hydroxypropenal

Explanation:

Answer:

Crust

Explanation:

Answer:

The crust

Explanation:

Taking into account the definition of pH and pOH, the hydroxide ion concentration will be 6.61×10⁻⁵ M.

pH is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.

The pH is defined as the negative base 10 logarithm of the activity of hydrogen ions, that is, the concentration of hydrogen ions or H₃O⁺:

pH= - log [H⁺]= - log [H₃O⁺]

Similarly, pOH is a measure of hydroxyl ions in a solution and is expressed as the logarithm of the concentration of OH⁻ ions, with the sign changed:

pOH= - log [OH⁻]

The following relationship can be established between pH and pOH:

pOH + pH= 14

In this case you know that the hydrogen ion concentration is 1.5×10⁻¹⁰ M, this is, [H⁺]= 1.5×10⁻¹⁰ M.

Replacing in the definition of pH:

pH= - log (1.5×10⁻¹⁰ M)

Solving:

pH=  9.82

Replacing in the relationship established between pH and pOH, the pOH can be calculated as:

pOH + 9.82= 14

Solving:

pOH= 14 - 9.82

pOH= 4.18

Replacing in the definition of pOH, the concentration of hydroxide ion is obtained:

- log [OH⁻]= 4.18

Solving:

[OH⁻]= 10⁻⁴ ¹⁸

[OH⁻]= 6.61×10⁻⁵ M

In summary, the hydroxide ion concentration will be 6.61×10⁻⁵ M.

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The amount of potassium nitrate that can be dissolved in 200 g of water at  60°C is 101 gm/ml.

The solubility graph is a completely beneficial tool as it tells you the amount of potassium nitrate that may be dissolved consistent with

one hundred mL, of water on the way to have a saturated answer of potassium nitrate at a given temperature.

In an effort to discover the solubility of the salt at

60∘C, begin from the

60∘C

Mark on the graph and move up till you intersect the curve. on the factor of intersection, move left till you intersect the

the y-axis and study the cost that you land on.

In this situation, you could estimate that the solubility of potassium nitrate in water at

60∘C is the same as about

solubility ≈ a hundred and ten g / 100 mL water.

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Answer:

I'm pretty sure your answer will be 9

Answer:

9

Explanation:

Mass number = proton + neutron

                       = 4 + 5

                       = 9

Answer:

Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO

Explanation:

The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.

The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.

The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.

The methyl groups are non-polar and do not have any significant reactivity.

The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.

The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.

Answer: 0.27 moles of CO2 and 11.88 grams of CO2

Explanation: Use the Ideal Gas Law, PV = nRT, substitute the values given and solve.

I can't seem to upload procedure but:

P = 1.5atm

V = 4.5L

n = moles

R = 0.0821gr/mol (when using atm, kPa is 8.31)

T = 300K

Isolate what you don't have, in this case n. Change PV = nRT to PV/RT = n. Substitute the values to get moles. Once you have this, multiply the value by the molar mass of CO2 (44gr/mol) to get the mass of CO2 in grams.

11.76 cm² to two significant figures will give the area of the rectangle as 11.8 cm².

To reduce a number to two significant figures, you need to perform the following steps:

To reduce 11.76 to two significant figures, you need to determine the first two non-zero digits and the location of the decimal point. The first two non-zero digits are 11, and the decimal point is between the 1 and the 7. Therefore, the reduced number is 11.8 (since the rounding rule is to round up if the third digit is 5 or greater). So, 11.76 reduced to two significant figures is 11.8 cm².

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Answer:

A

Explanation:

thanks for the points

Answer: it B

Explanation: i just took the test

Answer: Industrial processes including mining and manufacturing historically have been leading causes of soil pollution. Industrial areas typically have much higher levels of trace elements and organic contaminants. This is due to intentional and unintentional releases from industrial processes directly into the environment, including to the soil, adjacent water bodies, and the atmosphere.

Explanation:

In order to determine whether there is a significant difference between two samples, the Student's t-test examines their mean and standard deviation.

A significant t-score, also known as a t-value, denotes a difference between the groups, whereas a small t-score denotes similarity. Degrees of freedom are the values in a research that have the flexibility to change, and they are crucial for determining the significance and reliability of the null hypothesis.

This test is used when specimens from two distinct populations, species, or groupings are compared and analyzed. The independent T-test is another name for it.

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Answer:

D.  The reaction described by curve B is occurring with a catalyst.

Explanation:

The peak in the curve is the activation energy.  According to this graph, the activation energy was lowered.  A catalyst is what you can use to lower the activation energy.

The most likely accounts for the difference between curve A and curve B on the energy diagram is the reaction described by curve B is occurring with a catalyst,  therefore  option (d) is correct.

A catalyst is a chemical substance which alters the rate of a reaction without itself undergoing any permanent chemical change.

A catalyst does not initiate a chemical reaction. A catalyst does not be consumed in the reaction.

Catalysts tend to react with reactants to form intermediates and at the same time facilitate the production of the final reaction product. After the whole process, a catalyst can regenerate.

Catalysts encourage molecules to react and make the whole reaction process easier and efficient.

The most likely accounts for the difference between curve A and curve B on the energy diagram is the reaction described by curve B is occurring with a catalyst,  ,hence option (d) is correct.

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Ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)) mixture could be a useful buffer in a solution. Option C

A buffer is a solution that can resist changes in pH when small amounts of acid or base are added. It consists of a weak acid and its conjugate base or a weak base and its conjugate acid. The buffer system works by the principle of Le Chatelier's principle, where the equilibrium is shifted to counteract the changes caused by the addition of an acid or a base.

In option A, acetic acid (\(CH_3CO_2H\)) is a weak acid, but hydrochloric acid (HCl) is a strong acid. This combination does not form a buffer because HCl is completely dissociated in water and cannot provide a significant concentration of its conjugate base.

Option B consists of sodium hydroxide (NaOH), which is a strong base, and elemental sodium (Na), which is a metal. This combination does not form a buffer as there is no weak acid-base pair involved.

Option D contains acetic acid (\(CH_3CO_2H\)), a weak acid, and ammonia (\(NH_3\)), a weak base. Although they are weak acid and base, they do not form a buffer system together as they are both weak acids or bases and lack the required conjugate acid-base pair.

Option C, ammonia (\(NH_3\)), is a weak base, and ammonium chloride (\(NH_4Cl\)) is its conjugate acid. This combination can form a buffer system. When ammonia reacts with water, it forms ammonium ions (NH4+) and hydroxide ions (OH-).

The ammonium ions act as the weak acid, while the ammonia acts as the weak base. The addition of a small amount of acid will be counteracted by the ammonium ions, and the addition of a small amount of base will be counteracted by the ammonia, thus maintaining the pH of the solution relatively stable.

Therefore, option C, consisting of ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)), is the suitable mixture that could be a useful buffer in a solution.

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