1.1.F - Lesson Review: What is Science Knowledge?

help xnx

Answer:

The correct answer is - DNA (check image).

Explanation:

In this diagram, The W mark is the nucleus of the cell X is the chromosome Y represents the DNA and Z is the gene. Gene is the segment of the DNA and DNA is the pat of the chromosome with histone. Chromosomes are present in the nucleus of the cell. These all are the structures of the genetic structures.

Thus, the correct answer is - DNA.

Answer:

dna

Explanation:

edge

Answer:

6 i think

Explanation:

Answer:

I say 5or6? I'm not to sure

Explanation:

i hope it helped don't just take my answer tho bc I'm not 100% sure

The question is incomplete, the complete question is;

Each sentence describes potential and kinetic energy at various locations on a slide. Complete each statement by selecting the position of the object on the slide.

An object at position has all kinetic energy. A B or C

An object at position has all potential energy. A B or C

An object at position has about half potential energy and half kinetic energy. A B or C

Answer:

An object at position C has all kinetic energy.

An object at position A has all potential energy.

An object at position B has about half potential energy and half kinetic energy.

Explanation:

Lets take a good look at the image.

At position A, the object is stationary and we know that the energy possessed by an an object by virtue of its position is known as potential energy. Hence at A, the energy possessed by the body is all potential.

At position B, the total mechanical energy of the object becomes potential energy + kinetic energy as the object is now in motion.

At position C, the object is still in motion and the energy is all kinetic.

Answer:

C

A

B

Explanation:

Explanation:

One molecule of the antibiotic known as penicillin G has a mass of ... b) If you isolate 115 g of zinc chloride, what is the percent yield of the metal ... This drives off the volatile hydrochloric acid, but the.

As Sandra reacts to the 3.345 g of zinc with hydrochloride acid as HCL the obtained value is about 3.956 g of zinc and the chloride the calculated value is.

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Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

\(volume = \frac{mass}{density} \\\)

From the question

mass of metal = 300 g

density = 7.13 g/mL

We have

\(volume = \frac{300}{7.13} \\ = 42.07573632...\)

We have the final answer as

Hope this helps you

Answer:

CFCs and halogens coming from spray bottles and other human satisfaction sustaining devices cause global warming, which will cause sea levels to rise. Because of this, several countries have banned these chemicals because of anticipation of a rise of sea levels and several important countries to be sunken.

1. The molarity of the solution is 0.674 M.

2. 47.88 g of CuSO₄ in a small volume of water to make a concentrated solution.

3. 217 mL of 6.00M H₂SO₄ using a graduated cylinder or pipette, and transfer it to a 500 mL volumetric flask.

1. The molar mass of KNO₃ is:

K = 39.10 g/mol

N = 14.01 g/mol

O = 16.00 g/mol (x3)

Molar mass of KNO₃ = 101.10 g/mol

To find the number of moles of KNO₃:

mass = 341 g

moles = mass/molar mass = 341/101.10 = 3.37 mol

The volume of the solution is given as 5.0 L, so the molarity of the solution is:

Molarity = moles of solute/volume of solution

Molarity = 3.37 mol/5.0 L = 0.674 M.

2. To prepare 250 mL of 1.2M CuSO₄ solution:

1.2 mol/L x 0.250 L = 0.30 mol CuSO₄

Then, calculate the mass of CuSO₄ needed using its molar mass:

0.30 mol x 159.61 g/mol = 47.88 g CuSO₄

3. To prepare 500 mL of 2.6M H₂SO₄ solution:

2.6 mol/L x 0.500 L = 1.3 mol H₂SO₄

Then, calculate the volume of 6.00M H₂SO₄ needed to contain 1.3 mol of H₂SO₄:

1.3 mol / 6.00 mol/L = 0.217 L = 217 mL

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Answer: a I think

Explanation:

Answer:

I think the answer is a

Explanation:

There is a 33.3% chance that it is correct. Why not risk it?

An electron loses potential energy when it moves further away from the nucleus of the atom. This corresponds to option E) in the given choices.

In an atom, electrons are negatively charged particles that are attracted to the positively charged nucleus. The closer an electron is to the nucleus, the stronger the attraction between them. As the electron moves further away from the nucleus, the attractive force decreases, resulting in a decrease in potential energy.

Option E) "moves further away from the nucleus of the atom" is the correct choice because as the electron moves to higher energy levels or orbits further from the nucleus, its potential energy decreases. This is because the electron experiences weaker attraction from the positively charged nucleus at larger distances, leading to a decrease in potential energy.

Therefore, the correct answer is option E) moves further away from the nucleus of the atom.

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Answer:

1. \(2.879 * 10^{23}\) atoms of AgCl

2. \(1.96 * 10^{7}\) g of Bi

3. \(C_2H_8O\)

Bonus: \(8.31*10^{23}atomsC\)

Explanation:

1) If there are 68.54 grams of silver chloride, first know the chemical formula of silver chloride is AgCl. Then, you can use the molar mass of AgCl, found by adding the molar mass of its constituent elements on the periodic table, and unit conversions to solve for the amount of atoms of AgCl. Keep in mind that Avogadro's number states that there are \(6.02 * 10^{23}\) atoms in one mole of a substance. Keep in mind that your answer will have four significant figures.

\(68.54 grams AgCl* \frac{1 mol AgCl}{(107.87gAg + 35.45gCl)} *\frac{6.02*10^{23}atoms}{1 mol} = 2.879 atomsAgCl\)

2) If there are \(5.64 * 10^{28}\) atoms of bismuth, you can use the molar mass of Bi found on your periodic table and constants in order to calculate the mass of Bi.

\(5.64*10^{28}atoms Bi * \frac{1 mol Bi}{6.02 * 10^{23}atoms Bi} * \frac{208.98gBi}{1 molBi} = 1.96 * 10^7gBi\)

4) When asked for the empirical formula, recall that the empirical formula of a compound differs from its chemical formula, as the empirical formula is essentially the "greatest common factor" version of a chemical formula. For example, glucose, \(C_{6} H_{12}O_{6}\), and acetic acid, \(CH_3COOH\) (or \(C_2H_4O_2\)) have different chemical formulas, but their empirical formulas are the same, represented as \(CH_2O\), where the greatest common factor 6 is factored out of glucose to obtain this formula, while the greatest common factor 2 is factored out of acetic acid.

Given this information, you can imagine that there are 100g of carbon, hydrogen, and oxygen in this compound, so that the percentages given are easy to convert into mass. (Note that since empirical formula is a simplified form, the molar mass of the compound won't matter). This gives us a compound with 50.0g of carbon, 33.3g of oxygen, and 16.7g of hydrogen. We can then convert those values into moles:

\(50.0gC * \frac{1molC}{12.01gC} = 4.16molC\\33.3gO * \frac{1molO}{16.00gO} = 2.08molO\\16.7gH * \frac{1 mol H}{1.01gH} = 16.5molH\)

Now, you can express a formula for this compound as \(C_{4.16}H_{16.5}O_{2.08}\).

The lowest of these numbers is 2.08, or the number of moles of O in the formula. Dividing each of the subscripts by 2.08 will result in the following formula:

\(C_{4.16/2.08}H_{16.5/2.08}O_{2.08/2.08} = C_2H_8O\)

Note: Depending on if 1.00g/mol or 1.01g/mol was used for the molar mass of hydrogen, either 7.93 or 8.03 would be found to be the subscript of H. This is simply factored out by rounding either value to simply 8.

Bonus) Knowing that there are 25.6g of the substance in question, we can simply find 64.9% (the percent composition by mass of carbon for the unkown compound) of the total mass of the unknown compound.

\(25.6g * 0.649 = 16.6gC\)

Now, simply use the molar mass of carbon, 12.01g/mol, to find the moles of carbon present.

\(16.6gC * \frac{1molC}{12.01gC} = 1.38molC\)

Now, using Avogadro's number, convert from moles to atoms. Keep in mind that your answer will have three significant figures.

\(1.38molC * \frac{6.02*10^{23}atomsC}{1molC} = 8.31*10^{23}atomsC\)

Answer:

15.055 X 1023 atoms

Explanation:

hope clear

Answer:

Yes

Explanation:

Some bacteria is good for you like the bacteria in your digestive system, which helps with breaking down food and keeping you healthy

An expression for the instantaneous selectivity of species X with respect to species Y and Z Specify the type of reactor and the conditions to maximize the selectivity to X are CFSTR.

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Answer:

a compound different from a molecule?

Molecule is a substance with two or more atoms bonded together such as the oxygen humans breathe (O2). Elements are pure substances made up of all the same atoms such as gold (Au), hydrogen (H), and oxygen (O). ... Compounds are two or more elements bonded together such as table salt (NaCl).

Explanation:

hope this helps

Answer:

they are diffrent by the way that atoms bind togther

Explanation:

if the atom is a diffrent structure thier diffrnt componds

Based on its location on the periodic table,  properties will Krypton (Kr) have is it is unreactive , gas, stable.

Krypton in the periodic table belongs to  group 18. the group 18 in periodic table is noble gases. the noble gas is the very extremely stable. the noble gases have 8 electrons in the outer most valence shell. they follow the octet rule and this makes noble gases unreactive and stable. they do not bond with other because they are already stable.

Thus, Based on its location on the periodic table,  properties will Krypton (Kr) have is it is unreactive , gas, stable.

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Explanation:

28 gram of Nitrogen react with six gram of hydrogen to give 34 gram of ammonia then 45 gram of hydrogen gives 25.5 gram of NSD and the number of moles in NH3 is given by mass by molecular mass that is 1.5 mole

Answer:

2

Explanation:

The subscript on Ammoniumwhich is (NH4) is 2.

Hope this helped!

Compound is a group of same molecules, Element is a group of same atoms and mixture is combination of two or more pure substances.

What are Molecules ?

Molecules are the combination of two or more different atoms combine in a fixed ratio.

Molecules can be independently founded.

Atoms are always founded in combined state and does not occurs independently except rare earth elements which belongs to 18th group of periodic table.

Chemicals are taken in compound state But they undergo chemical reaction individually in molecular level.

Hence, Compound is a group of same molecules, Element is a group of same atoms and mixture is combination of two or more pure substances.

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The moist adiabatic rate is different from the dry adiabatic rate because it considers the water vapor condensation or evaporation in the air during adiabatic processes.

In atmospheric science, adiabatic processes refer to the changes in temperature and pressure that occur as air parcels rise or descend in the atmosphere without exchanging heat with their surroundings. The dry adiabatic rate, also known as the lapse rate, describes the rate at which the temperature of a dry air parcel changes with altitude as it expands or compresses adiabatically.

However, when the air contains water vapor, the presence of moisture can significantly influence the adiabatic temperature changes. As an air parcel rises and expands, it cools down according to the dry adiabatic rate. However, if the temperature of the parcel reaches its dew point, which is the temperature at which condensation occurs, water vapor begins to condense into liquid water or form ice crystals. This process releases latent heat, which partially offsets the cooling due to expansion. As a result, the temperature of the moist air parcel cools at a slower rate compared to the dry adiabatic rate. This slower rate is known as the moist adiabatic rate or saturated adiabatic lapse rate.

Therefore, the moist adiabatic rate differs from the dry adiabatic rate because it considers the effects of water vapor condensation or evaporation on the temperature changes of an air parcel as it rises or descends in the atmosphere.

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Answer: 18

Explanation: thats all

Answer:

Hi! Your answer here is e. 0.018km. The total number of meters Mark ran over the course of three days is 18. The problem asks that we convert this number to kilometers, and 18 meters is equivalent to 0.018 kilometers.

Have a great day! - Mani :)

Since 75% of the parent atoms have decayed (100% - 25% = 75%), one half-life must have passed. Therefore, the rock is 100 million years old, which is the duration of one half-life.

Based on the given information, we can assume that the rock originally had 100 parent atoms and 0 daughter atoms. Over time, half of the parent atoms (50) would decay into daughter atoms, leaving 50 parent atoms and 50 daughter atoms. This process would repeat every 100 million years, with half of the remaining parent atoms decaying into daughter atoms.

Using this pattern, we can calculate how much time has gone by by figuring out how many half-lives have occurred.

At the beginning, the rock had 100% parent atoms, which corresponds to 0 half-lives. When the ratio of parent to daughter atoms became 25:75, this means that 3 half-lives had occurred.

Each half-life is 100 million years, so we can calculate the age of the rock by multiplying the number of half-lives by the length of each half-life:

3 half-lives x 100 million years per half-life = 300 million years

Therefore, the rock is approximately 300 million years old.

Based on the given information, the radioactive isotope has a half-life of 100 million years, and the current ratio of parent to daughter atoms is 25:75 (25% parent and 75% daughter). To find the age of the rock, we can determine the number of half-lives that have occurred.

Since 75% of the parent atoms have decayed (100% - 25% = 75%), one half-life must have passed. Therefore, the rock is 100 million years old, which is the duration of one half-life.

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Answer:

H2 (g) + I2 (g) = 2HI (g)

Explanation:

Forward reaction:H2(g)+I2(g)→2HI(g)

Reverse reaction:2HI(g)→H2(g)+I2(g)

Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

Answer:

iron+flourine.............iron flouride

Fe+F2.............FeF3

the above reaction is not balanced

now to balance this reaction

2Fe+3F2...........2FeF3

now this reaction is balanced

The balanced equation is: 2Fe + 3F2 ⇒ 2FeF3

A chemical equation needs to be balanced if you want to make the wide variety of the atoms of the reactants equal to the variety of the atoms of the goods.

Given,

Iron + fluorine ⇒ Iron Flouride

Fe + F2 ⇒ FeF3

Now to balance this reaction:

2Fe + 3F2  ⇒ 2FeF3

This reaction is balanced.

This medicine is a mixture manufactured from nutrients, iron, and fluoride. it's miles utilized in infants and youngsters to deal with or prevent deficiency because of terrible weight loss programs or low tiers of fluoride in drinking water and other sources.

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Answer:

85g

Explanation:

To convert the moles of a substance to grams we need to know the molar mass of the substance. We, as first, must obtain the molar mass of (NH₄)₂S as follows:

There are 2 atoms of N, 8 of H and 1 of S:

N = 2*14g/mol = 28g/mol

H = 8*1g/mol = 8g/mol

S = 1*32g/mol = 32g/mol

Molar mass: 68g/mol

That means 1 mole of (NH₄)₂S has a mass of 68g.

1.25moles have a mass of:

1.25moles * (68g/mol) =

Answer:The explanation is true

Directly proportional is like temperature and volume

V=kT  as Temp increases, volume increases

Inversely proportional is like pressure and volume

VP=k  as P increases, V decreases.

since wavelength time frequency is the speed of light,

wavelength and frequency are inversely proportional

lf=c

Explanation:

In electromagnetic waves, the frequency and wavelength are inversely proportional, which means if one gets larger, the other must get smaller. ...

Answer:

2.5

Explanation:

The limiting reactant in the given reaction is CS (carbon disulfide).

To determine the limiting reactant, we need to compare the amount of each reactant used with the stoichiometry of the balanced equation. Since the balanced equation shows that the molar ratio between CS and O2 is 1:3, we need to convert the given volumes to moles using the ideal gas law. After comparing the moles of CS and O2, we find that CS is the limiting reactant.

Therefore, CS is the limiting reactant in the reaction. It means that all the CS will be consumed before the O2 is completely utilized, limiting the amount of product that can be formed.

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Answer:

Explanation:

The most prominent function of mitochondria is to produce the energy currency of the cell, ATP (i.e., phosphorylation of ADP), through respiration and using sugar as fuel, and to regulate cellular metabolism .