Which phrase describes radiation?


A.the process in which energy is released by molecules breaking apart


B.transfer of heat between two objects that are touching


C.transfer of heat by the actual movement of warmed matter


D.the process in which energy is emitted by one object, transmitted through space, and absorbed by another

Answer:

Grams of fat would be labeled in 1.3 pounds of ground beef are :

= 117.94 grams

Explanation:

STEP 1: Convert pound into grams:

1 pound = 453.6 grams (learn this)

STEP 2 : Calculate the number of grams in 1.3 pound.

Multiply the number by 1.3

1.3 pound = 1.3 x 453.6  grams

1.3 pound = 589.68 grams

STEP 3: Calculate the mass in 20 % percentage of sample.

[tex]20\% of\ x=x\times \frac{20}{100}[/tex]

Here x = 589.68 grams

[tex]20\%\ of\ 589.68 =589.68\times \frac{20}{100}[/tex]

[tex]20\%\ of\ 589.68 =117.93grams[/tex]

= 117.94 grams

To calculate the fat content in 1.3 pounds of 20% fat ground beef, convert the weight to grams and multiply by the fat percentage, resulting in approximately 117.934 grams of fat.

To determine how many grams of fat are in 1.3 pounds of ground beef labeled as 20% fat, we first need to convert the weight from pounds to grams, since fat content is typically labeled in grams.

Step-by-Step Calculation

Convert pounds to grams: 1 pound (lb) is approximately 453.592 grams (g). Thus, 1.3 lbs is equal to 1.3 × 453.592 g.

Calculate the total grams of beef: 1.3 × 453.592 g = 589.669 g of beef.

Calculate the fat content: Since the ground beef is 20% fat, we determine the fat content by multiplying the total weight of the beef by the percentage of fat. That is 0.20 × 589.669 g.

Find the amount of fat in grams: 0.20 × 589.669 g = 117.934 g of fat.

Therefore, there would be 117.934 grams of fat in 1.3 pounds of ground beef with 20% fat content.

Answer: its 3

Explanation:

Answer:

3 has the highest temperature

Explanation:

Just took the test hope this helps. Leave a thanks please

Answer: Ionic bond

Explanation: Ionic bonding is the transfer of electrons form least electronegative atom to a more electronegative one. Ionic bonds are commonly formed between a metal an electron donor and a non metal an electron acceptor. Since nonmetals have higher ionization energy and electronegativity electrons are transferred to them.

Answer:

Ionic bond

Explanation:

72,300 years are required to reduce Plutonium-239 from 1000 g to 125 g.

Explanation:

It is known that 1 kg of anything is equal to 1000 g of the same compound. Also the half life of any radioactive element meant decay of half of the weight of that element after the half life time.

As here the half life time of Plutonium-239 is said to be 24,100 years. This means after the first interval of 24,100 years, the plutonium-239 of 1000 g will reduce to 1000/2=500 g of plutonium. That means only 500 g of plutonium 239 will be present after the completion of first interval of 24,100 years.

Similarly, the second interval of 24,100 years will again reduce the mass from 500 g to 250 g. Then the third interval of 24,100 years will reduce the mass from 250 g to half of it i.e., 125 g of plutonium. Thus, as per the question, the time taken to reduce 1 kg of plutonium to 125 g of plutonium will require three intervals of half life time. Thus , the total time required to reduce the concentration from 1000 g to 125 g is No.of intervals× Half life time.

Total time required to reduce the weight from 1000 g to 125 g = No.of interval ×Half life time

Total time = 3 ×24100 years = 72,300 years.

So 72,300 years are required to reduce Plutonium-239 from 1000 g to 125 g.

It will take 72,300 years for a 1-kilogram sample of Plutonium-239 to decay to 125 grams. We calculate this by determining that three half-lives will occur for the sample to reach the final mass, with each half-life being 24,100 years.

To calculate how long it will take a 1-kilogram sample of Plutonium-239 to decay to 125 grams, we can use the concept of half-lives. Since Plutonium-239 has a half-life of 24,100 years, we know that every 24,100 years, half of the initial amount will remain.

The process of decay is exponential, and we can find the number of half-lives by the equation:

Number of half-lives (n) = log(final amount / initial amount) / log(0.5)

Filling in the amounts (125 grams final amount, 1000 grams initial amount), we get:

Number of half-lives (n) = log(125 / 1000) / log(0.5) = 3

Therefore, the sample will undergo three half-lives to reach the final mass of 125 grams. To find the total time, we multiply the number of half-lives by the half-life of Plutonium-239:

Total time = Number of half-lives × Half-life of the isotope = 3 × 24,100 years = 72,300 years.

It will take 72,300 years for a 1-kilogram sample of Plutonium-239 to decay to 125 grams.

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Answer: atomic number Z, gives the proton number of an element and it is unique for all elements ( i.e no two elements have the same atomic number or proton number) if the atom of the element is electrically neutral, the atomic number can also be the electron number

Explanation:

Answer:

even though I am missing the question I believe that the correct answer to the question is; his cats will be brown (Dominant)

Explanation:

this statement is true to the fact that on of his cats has the homozygous dominant gene BB. For their to be a chance of a white cat as an offspring both cats would either have to be Hetrozygous (Bb) or Homozygous recesssive (bb)

Answer:

                     Mass of K₂SO₄  =  12.633 g

Explanation:

                    The balance chemical equation for given reaction is as;

                                     CaSO₄ + 2 K = K₂SO₄ + Ca

To solve this reaction one should first find the limiting reagent. To do so e will calculate the moles of each reactant as,

Moles of CaSO₄  =  Given Mass / M.Mass of CaSO₄

Moles of CaSO₄  =  9.87 g / 136.14 g/mol

Moles of CaSO₄  =  0.0725 moles

Similarly for K,

Moles of K  =  Given Mass / A.Mass of K

Moles of K  =  12.05 g / 39.10 g/mol

Moles of K  =  0.308 moles

Now, according to equation,

             1 mole of CaSO₄ reacts with  =  2 moles of K

So,

         0.0725 moles of CaSO₄ will react with  =  X moles of K

Solving for X,

                     X  =  0.0725 moles × 2 moles / 1 mole

                      X  =  0.145 moles of K

As calculated above, we are provided with 0.308 moles of K while, we require only 0.145 moles of it so it means that K is in excess and CaSO₄ is the limiting reagent hence, CaSO₄ will control the yield of K₂SO₄.

So,

The amount of K₂SO₄ produced is calculated by first finding its moles as,

According to equation,

             1 mole of CaSO₄ produced  =  1 mole of K₂SO₄

So,

         0.0725 moles of CaSO₄ will produce  =  X moles of K₂SO₄

Solving for X,

                     X  =  0.0725 moles × 1 mole / 1 mole

                      X  =  0.0725 moles of K₂SO₄

Now convert moles of K₂SO₄ to mass as,

Mass of K₂SO₄  =  Moles × M.Mass

Mass of K₂SO₄  =  0.0725 × 174.26 g/mol

Mass of K₂SO₄  =  12.633 g

Answer:

The answer is chemical properties such as its ability to form chemical bonds

Explanation:

The statement that represents what can be learned by the number of electrons on the outer energy level of an atom is chemical properties such as its ability to form chemical bonds.

Valence electrons in chemistry refers to any of the electrons in the outermost shell of an atom that is capable of forming bonds with other atoms.

The valence electrons of an atom is responsible for its ability to form chemical bonds with other atoms.

The valence electrons of an atom gives no information on the physical property of the element.

Therefore, the statement that represents what can be learned by the number of electrons on the outer energy level of an atom is chemical properties such as its ability to form chemical bonds.

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Answer:it doesn’t

Explanation:

Answer:

Subscript

Explanation:

Atoms in a chemical formula are represented by a subscript.

Answer: 341.15atm

Explanation:Please see attachment for explanation

The new pressure in the cylinder after the temperature increase to 475°C is approximately [tex]\( 341.53 \)[/tex] atm.

The new pressure of the gas cylinder after the temperature increase, we can use the combined gas law, which relates the initial and final states of a gas under changing conditions of temperature and pressure, assuming constant volume.

The combined gas law is given by.

[tex]\[ \frac{P_1 \cdot V_1}{T_1} = \frac{P_2 \cdot V_2}{T_2} \][/tex]

where.

[tex]- \( P_1 \) and \( T_1 \)[/tex] are the initial pressure and temperature.

[tex]- \( P_2 \) and \( T_2 \)[/tex] are the final pressure and temperature.

[tex]- \( V_1 \) and \( V_2 \)[/tex] are the initial and final volumes respectively assuming constant volume here.

Given.

- Initial pressure, [tex]\( P_1 = 135 \)[/tex] [tex]atm[/tex].

- Initial temperature, [tex]\( T_1 = 23 \) °C = \( 23 + 273.15 = 296.15 \)[/tex] K.

- Final temperature, [tex]\( T_2 = 475 \) °C = \( 475 + 273.15 = 748.15 \)[/tex] K.

We need to find [tex]\( P_2 \)[/tex], the final pressure.

First, let's rearrange the combined gas law to solve for [tex]\( P_2 \).[/tex]

[tex]\[ P_2 = \frac{P_1 \cdot T_2}{T_1} \][/tex]

Now, substitute the given values.

[tex]\[ P_2 = \frac{135 \cdot 748.15}{296.15} \][/tex]

Calculate [tex]\( P_2 \).[/tex]

[tex]\[ P_2 = \frac{101135.25}{296.15} \][/tex]

[tex]\[ P_2 \approx 341.53 \, \text{atm} \][/tex]

Answer:

Animal cell lacks chloroplasts and a cell wall

Explanation:

Unlike animal cells, plant cells have chloroplasts and a cell wall. In a plant cell, the chloroplasts work to use photosynthesis in order to turn light into energy for the plant cell. Animal cells do not utilize light energy, and therefore do not carry out photosynthesis and do not have chloroplasts.

Additionally, the plant cell has a protective cell wall and a cell membrane, while animal cells only have a cell membrane. This is because the plant cells' cell wall provides additional strength and protection against outside factors, such as osmosis.

Both plant and animal cells have nuclei and cytoplasm, but plant cells have additional structures like cell walls, chloroplasts, and a large central vacuole. Animal cells lack these structures.

Plant cells and animal cells have both similarities and differences. Both types of cells have nuclei and cytoplasm. However, plant cells have cell walls and chloroplasts, which allow for photosynthesis, while animal cells do not have these structures. Additionally, plant cells have a large central vacuole, plastids, and plasmodesmata, which are not found in animal cells.

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Answer: Formation of a new gas

Formation of a precipitate

A new smell is given off

Heat is released

Explanation: A chemical reaction exhibits the following characteristics: formation of new substance, heat emission is an exothermic process which is due to chemical reactions

Precipitate formation occurs when insoluble substances are formed in an ionic compound solution.

And smells or odor are caused by the production of new substances.

Answer:anions with least precipitates are anions of salt produce by a strong acid and strong base e.g KCL,Na2SO4,

Explanation: salts produce from strong acid such as HCL and a strong base such as KOH are extremely soluble and hence produce little or no precipitate when dissolved in water .meaning the salt are highly soluble , most group1 elements form salts that are highly soluble and hardly precipitates e.g Na(sodium) pottasium(K) ,lithium(Li)salts.they are called alkaline metals.

B) exception to the rules are hydrogen and Rubidium.hydrogen because it occurs basically as a gas and forms H^+ which tend to form a hydrogen bond while rubidium is a heavy metal forming insoluble salt

Without additional context, it is difficult to determine which supernatural element is emphasized. In literature, each element typically has a distinct significance that contributes to the plot's development.

To ascertain which supernatural element is emphasized, we need additional context from the text or material being discussed. Generally, in literature, supernatural elements like ghosts, prophecies, goblins, and angels serve to create a sense of mystery or to advance the plot. Each element has its own typical significance: a ghost might represent unresolved issues from the past, a prophecy could foreshadow future events, a goblin often adds a touch of mischief or terror, and an angel could symbolize guidance or protection.

Answer:

It would be A, B, and C.

Explanation: This is because radio waves are the longest and gamma rays are the shortest wavelengths. Visible light is in between infrared and ultraviolet rays.

Answer:

Three chlorine ions

Explanation:

Answer:

A.  Number of  moles, n = Reacting mass / Molecular mass

                                 n = 72.04/ 196.966

                                 n = 0.366 mole

Hence, the number of moles of gold (Au) in the sample is 0.366 mole

B. the number of atoms of gold (Au) in the sample is expressed as

                                  = 0.366 * 6.03*∧1023

                                   = 2.20698E35 atoms

Explanation:

Answer

and

Explanation:

All the energy in oil, gas, and coal originally came from the sun, which is captured through photosynthesis. The same way that we burn wood to release energy that the trees capture from the sun, we burn fossil fuels to release the energy that ancient plants had captured from the sun.

Hope this answered your question!

Please let me know how I did.

Final answer:

The first step of the scientific method is to make observations. Through observations, scientists gather information about a natural phenomenon or problem that they want to investigate.

Explanation:

The first step of the scientific method is to make observations. Through observations, scientists gather information about a natural phenomenon or problem that they want to investigate.

For example, a student arrives at class and notices that the classroom is too warm. This observation leads to a question, 'Why is the classroom so warm?'

By making careful observations, scientists can then proceed to form a hypothesis, which is the next step of the scientific method.

Answer: 437 g C6H6

Explanation: Solution attached:

1 mole of C6H6 is equal to its molar mass 78 g C6H6.

5.6 moles C6H6 x 78 g C6H6 / 1 mole C6H6

= 437 g C6H6

The mass of C₆H₆ is 436.8 grams.

Given:

Moles of C₆H₆ =5.6 moles

To find:

Mass of C₆H₆ =?

It is defined as given mass over molar mass.

Number of moles =  Given mass / Molar mass

Molar mass of C₆H₆ = 12*6 + 1*6 = 72+6= 78 g/mol

Mass = Number of moles *  Molar mass

Mass = 5.6 moles * 78 g/mol

Mass = 436.8 grams

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Answer:

it is b

Explanation:

A molecule of a compound is composed of at least two types of atoms.

Explanation:

A molecule is defined as when two or more atoms of an element combine together by the bonds by sharing the electrons as O^2 (oxygen molecule)

A compound is a molecule when two different types of atom joined by chemical bonds as covalent, ionic or coordinate bonds as NH^3 ( ammonia)

Answer:

C- A molecule of a compound is composed of at least two types of atoms

Explanation:

just did the quiz

Answer:

it should be that I'm pretty sure it's Newton's law

Answer:

reactivity

Explanation:

Answer:

reactivity is the answer

Explanation:

Answer:

molecules P4O10 = 2.546 E22 molecules

Explanation:

∴ mass P4O10 = 12 g

∴ mm P4O10 = 283.886 g/mol

⇒ mol P4O10 = (12 g)×( mol/283.886 g) = 0.0423 mol P4O10

⇒ molecules P4O10 = (0.0423 mol P4O10)×(6.022 E23 molecules/mol)

⇒ molecules P4O10 = 2.546 E22 molecules

Answer:

c.

Explanation:

When the temperature of a gas increases by 4x, its volume will increase according to option A, by 4x as per Charles's law. Thus, correct option is A.

If the pressure of a gas is decreased by 4x, the volume will increase as per option A, by 4x as per Boyle's Law. Thus, correct option is A.

According to the ideal gas law (PV = nRT), when the temperature of a gas is increased, keeping other factors constant, its volume also increases proportionally. This is known as Charles's law. So, if the temperature is increased by 4 times, the volume will increase by 4 times as well.

Similarly, according to Boyle's law, when pressure decreases, volume increases proportionally. So, if the pressure is decreased by 4 times, the volume will increase by 4 times.

Therefore, the correct answers are A for both scenarios.

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Answer:

C₂HO₂Br₃

Explanation:

Data given

Carbon = 8.09%

Hydrogen = 0.34%

Oxygen = 10.78%

bromine = 80.78%

Empirical formula = ?

Solution:

First find the masses of each component

Consider total compound is 100g

As we now

mass of element = % of component

So,

8.09 g of C = 8.09% of Carbon

0.34 g og H = 0.34% of  Hydrogen

10.78 g of O =  10.78% of Oxygen

80.78 g of bromine = 80.78% of bromine

Now convert the masses to moles

For Carbon

Molar mass of C = 12 g/mol

            no. of mole = mass in g / molar mass

Put value in above formula

            no. of mole = 8.09 g/ 12 g/mol

            no. of mole = 0.674

mole of C = 0.6742

For Hydrogen

Molar mass of H = 1 g/mol

              no. of mole = mass in g / molar mass

Put value in above formula

              no. of mole = 0.34 g/ 1 g/mol

               no. of mole = 0.34

mole of H = 0.34 mole

For Oxygen

Molar mass of O = 16 g/mol

              no. of mole = mass in g / molar mass

Put value in above formula

              no. of mole = 10.78 g/ 16 g/mol

               no. of mole = 0.674

mole of O = 0.674 mole

For Br

Molar mass of Br = 80 g/mol

             no. of mole = mass in g / molar mass

Put value in above formula

              no. of mole = 80.78 g/ 80 g/mol

              no. of mole = 1.0098

mole of Br = 1.0098 moles

Now we have values in moles as below

C = 0.6742

H = 0.34

O = 0.674

Br = 1.0098

Divide the all values on the smallest values to get whole number ratio

C = 0.6742 / 0.34 = 1.983 ≅ 2

H = 0.34 / 0.34 = 1

O = 0.674 /0.34 = 1.983 ≅ 2

Br = 1.0098 / 0.34 = 2.97 ≅ 3

So all have round value 1 mole

C = 2

H = 1

O = 2

Br = 3

So the empirical formula will be C₂HO₂Br₃ i.e. all 3 atoms in simplest small ratio

The empirical formula of the compound is CH₂OBr.

The empirical formula can be determined by finding the ratio of the number of atoms of each element in the compound. To find the empirical formula, we first convert the percentages to grams. Using the given percentages, we can assume we have 100 grams of the compound. Hence, we have 8.09 grams of carbon, 0.34 grams of hydrogen, 10.78 grams of oxygen, and 80.78 grams of bromine.

Next, we convert the grams to moles by dividing each mass by the atomic weight of the respective element from the periodic table. The atomic weights are approximately 12.01 g/mol for carbon, 1.01 g/mol for hydrogen, 16.00 g/mol for oxygen, and 79.90 g/mol for bromine.

After finding the number of moles for each element, we divide each value by the smallest number of moles to get a simple whole number ratio. In this case, the smallest number of moles is 0.0816 moles, which corresponds to carbon. Hence, the ratio is approximately C₁H₀.₀₅ O₀.₂₇ Br₁, which simplifies to CH₂OBr.

Final answer:

A measuring device is used to determine physical quantities with accuracy and precision, while a holding device is used for support and stability.

Explanation:

In physics, a measuring device is used to determine physical quantities such as length, mass, volume, and voltage. These devices are designed to provide accurate and precise measurements by using standardized units and scales. Examples of measuring devices include rulers, balances, graduated cylinders, and voltmeters.

A holding device, on the other hand, is used to secure or support an object or component during a process or experiment. It is not intended for measuring physical quantities but rather for stabilizing or immobilizing an object in a particular position or orientation. Common examples of holding devices are clamps, vices, and fixtures.

So, the main difference between a measuring and a holding device is their purpose. A measuring device is used for measurement and quantification, while a holding device is used for support and stability.

Answer:

A, tho I'm not completely sure.

Maybe this will help (picture)

D orbitals start getting filled after the s orbital of the next highest energy level. This is due to the Aufbau principle which mandates that orbitals are filled in order of increasing energy levels. Even if 4s has a higher quantum number than 3d, it gets filled first due to its lower energy.

In atomic structure, d orbitals start getting filled after the s orbital of the next highest energy level. Each energy level in an atom has different types of orbitals - s, p, d, and f. The filling of these orbitals follows the Aufbau principle which means 'building up' in German. This principle essentially mandates that electrons fill up orbitals in order to increase energy levels.

The order of filling starts with the 1s orbital, then 2s, 2p, 3s, 3p, 4s and then the 3d orbitals. Thus, before the d orbitals start getting filled up, the s orbital of the next higher energy level (4s in this case) gets filled. It's important to note that despite 4s having a higher principal quantum number (n=4) than 3d (n=3), 4s has a lower energy and fills up before 3d.

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