What new combined branch of study was developed from the
study of matter within living systems?

There are  0.05  x [tex]10^{-6}[/tex] number of moles of Kr(g) having 0.3060 x [tex]10^{17\\}[/tex]atoms .

A mole is 6.02214076 x 1023 of any chemical unit, including atoms, molecules, ions, and others. Due to the large number of atoms, molecules, or other components that make up any substance, the mole is a useful measure to utilize.

Calculation .

One mole of the any atoms contains 6.022 x [tex]10^{23}[/tex] atoms .

So , the number of moles of Kr(g) having 0.3060 x 10^17 atoms is calculated as ,

number of moles of Kr = 0.3060 x [tex]10^{17\\}[/tex]atoms x 1 mole / 6.022 x [tex]10^{23}[/tex]atoms

number of moles of Kr = 0.05  x [tex]10^{-6}[/tex] mole

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Answer:

29.0576

Explanation:

To convert miles per hour to meters per second you divide the speed value by 2.237.

Answer:copper,stainless steel,iron,diamond,oak,calk,air

Explanation:your metlas is your meterials that absorbs most heat'

Forest Food web consists of the producers, main consumers, secondary consumers, scavengers, and decomposers. Food web is the collection of the large number of food chains.

Numerous food chains make up a food web. As animals seek food, a food chain only follows one way. As an example, a hawk consumes a snake following the consumption of a frog, a grasshopper, and grass. A food web illustrates the numerous relationships between plants and animals.

1. Primary consumers

2. Secondary consumers

3. Tertiary consumers

4. Decomposers or phytoremediators

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The correct answer is Test the hypothesis with an experiment.

The key goal of 4th step is to gather information and facts to test our idea.

Therefore, Rene is on the 4th step of scientific method.

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The correct answer is 45.21 g.

This issue will be resolved with the aid of the idea that chemical equilibrium is the rate of reversible processes at which the concentration of the reactants and products does not vary over time. The rate of reaction is exactly proportional to the raised to the power equal to the relevant stoichiometric coefficient, states the law of mass action.

Bromine monochloride is created when 31.5 grammes of bromine and 14.0 grammes of chlorine react.

Br2 + Cl2 ---> 2BrCl

mol Br2= 31.5/160g/mol= 0.196mol

mol Cl2= 14g/70.906g/mol= 0.197mol

Number of moles of BrCl formed = 2×0.196= 0.392 mol.

mass BrCl= 0.392 mol x 115.357g/mol= 45.21 g

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Answer:

CuCl has 0.025 and Al has 0.018 moles

Answer:

.019 and .0093

Explanation:

Answer:

Helper

Explanation:

is the expaltin of the explatin

Dimensions of a table and recorded the length as 103.50 cm and the width

as 73.75 cm

AREA = L × B

AREA = 103.50 × 73.75

area = 7,633.125 cm²

but the student should report 7633 cm² because the width measurement (73.75 cm) has 4 significant figures while the length measurement (103.50 cm) has 5 significant figures and when multiplying the answer should have the same number of significant figures as the number with the least number of sig figs.

so the correct answer should be 7633 cm².

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The given chemical reaction is :

Calcium Oxide (s) + Water (l) → Calcium Hydroxide (s)

Molecular Changes : A chemical reaction is one in which the replying substances experience changes at the molecular position. This means that bonds between tittles of the reactants are broken, and tittles are changed or rearranged to produce commodity new. Chemical reaction can be reversible or unrecoverable.

What happens when frying an egg ?

Frying an egg is a chemical response. It's an illustration of an endothermic response or bone that takes in heat to make the response do. An egg is made up of proteins and water, and the thralldom also contains fat. When an egg is hotted , the proteins begin to change their structure. Protein motes are veritably complex, made up of long chains of structure blocks called amino acids. These chains are also folded and twisted to make complicated molecular structures. Hotting the egg adds energy, which causes the motes to begin to move and lose their shape. Bonds holding the shape of the protein motes together begin to break, unfolding the proteins and allowing them to spread out. New bonds are formed, and water evaporates out of the egg, changing it into a semi-solid. The egg has experienced anon-reversible chemical response, as it can not be changed back into its raw state.

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Answer:

The correct answer is 119.

Explanation:

We are given the bond length of XY is 212.

The covalent radius of Y = 93.

Now this means that the bond length(R) is sum of the radio of X and Y Atom.

So, R(XY)=r(X)+r(Y)

212 = r(X)+93

r(X)= 119.

Therefore, the covalent radius of X is 119.

I hope this helps, have a good day! :D

Bond length is the distance between two bonded atoms. The covalent radius of X in XY molecule with bond length 212 and Y with a covalent radius of 93, is 119.

Covalent radius is the measure of the atomic size bonded with another atom through covalent bond. Covalent bonds are formed between non-metals with comparable electronegativities.

Bond length of molecule is the distance between the two bonded atom. Mathematically bond length of a covalent compound is the sum of covalent radius of the two bonded atoms.

The bond length of the molecule XY is given as 212 and the covalent radius of Y atom is 93. The bond length 212 is the sum of covalent radius of Y and covalent radius of X.

Covalent radius of X =  212 - 93 = 119.

Therefore, covalent radius of X atom in the XY molecule with bond length 212 and Y atom with covalent radius of 93 is 119 thus, option a is correct.

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The equation that shows the formation of the bromide ion from a neutral bromine atom is as follows: Br + e- → Br-

Ion is the atom or group of atoms bearing an electrical charge, such as the sodium and chlorine atoms in a salt solution.

An atom becomes an ion when it loses or gains electrons.

According to this question, bromine atom is neutrally charged but quicky becomes charged into an ion when it gains one electron. The equation is represented as follows:

Br + e- → Br-

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Density of the liquid is 0.418g/mL

The liquid sample has a volume of 0.000275 L. We can convert this to mL (because we are asked to find the density in g/mL):

mass of liquid= 0.115 grams

volume of the liquid, V= 0.000275L

Density is defined as the ratio of mass per unit volume

Now we must convert the unit of volume from L to ml as liter is SI unit which goes with Kilogram

volume in ml = 0.000275 ml/l x 1000 =0.275 ml

Density d = mass/volume

                = 0.115/ 0.275

                = 0.418 g/mL

Hence the density of the liquid is 0.418 g/mL

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The pressure of butane is 20 P(butane) = 0.77 atm and pressure of P(isobutane) = 19.2 atm

Isomerization is the transformation of a molecule into a different isomer, and it can take one of two forms: cis or trans. Protein isomerization was first described in 1968 as a method of dramatically altering protein conformation by disrupting polypeptide secondary structure.

Isomerism is caused by two main factors: Difference in atom linking mode. Difference in the spatial arrangement of atoms or groups. The difference in the mode of atom linking is one of the two main causes of isomerism. Difference in the spatial arrangement of atoms or groups.

The two main types of isomerism are structural or constitutional isomerism, in which the bonds between the atoms differ, and stereoisomerism or spatial isomerism, which occurs when the bonds are similar but the relative positions of the atoms differ.

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I understand the question you are looking for

For the isomerization reaction:

butane ⇌ isobutane

Kp equals 25 at 500°C. If the initial pressures of butane and isobutane are 20. atm and 0.0 atm, respectively, what are the pressures of the two gases at equilibrium?

A) P(butane) = 20 atm and P(isobutane) = 0.80 atm

B) P(butane) = 19.2 atm and P(isobutane) = 0.77 atm

C) P(butane) = 0.77 atm and P(isobutane) = 19.2 atm

D) P(butane) = 0.80 atm and P(isobutane) = 20. atm

Answer:

protons: 24

neutrons: 29

electrons: 24

Explanation:

Answer:

quadrant

Explanation:

sextant (astron.) instrument resembling a quadrant having a graduated are equal to ⅙ of a circle.

please rate brainliest if helps and follow

A. Potassium

this is because it only has one valence electron, which can be very easily removed, hence it's reactivity.

Answer: my answer would be a

Explanation: so i did some research and all of it came up with the answer (A).

The number of moles are in 9.27 x [tex]10^{22}[/tex] atoms of silicon is 0.153

The number of atoms is given as follows;

Atoms= nxNa

9.27x[tex]10^{22}[/tex]=nx6.022x[tex]10^{23}[/tex]

n=9.27x[tex]10^{22}[/tex]/6.022x[tex]10^{23}[/tex]

n=1.53x[tex]10^{-1}[/tex]

n=0.153

The number of moles n, is 0.153

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By applying Avogadro's constant, the number of lead atoms present in your lungs is equal to 2.49 × 10¹³ atoms of lead.

A conversion factor can be defined as a number that is typically used to convert (change) a number in one (1) set of units to another, either by dividing or multiplying.

Generally speaking, an appropriate conversion factor to an equal value must be used when it is necessary to perform any mathematical conversion.

Conversion:

Next, we would convert the volume of lungs in liters to meter cube (m³):

Volume of lungs = 5.6/1000

Volume of lungs = 5.6 × 10⁻³ m³.

Assuming the whole volume of lungs is filled with air, the number of lead atoms present is given by:

Number of lead atoms = 5.6 × 10⁻³ × 1.5

Number of lead atoms = 8.55 × 10⁻³ μg of lead.

Next, we would convert the mass of lead into moles of lead as follows:

Moles of lead = 8.55 × 10⁻³ × 1/207.2 × 1/10⁶

Moles of lead = 8.55 × 10⁻³/(207.2 × 10⁶)

Moles of lead = 4.13 × 10⁻¹¹ mole of lead.

Finally, we would determine number of lead atoms present by using Avogadro's constant:

Number of lead atoms = 4.13 × 10⁻¹¹ × 6.022 × 10²³

Number of lead atoms = 2.49 × 10¹³ atoms of lead.

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Complete Question:

The U. S. Environmental Protection Agency (EPA) sets limits on healthful levels of air pollutants. The maximum level that the EPA considers safe for lead air pollution is 1.5 μg/m³. If your lungs were filled with air containing this level of lead, how many lead atoms would be in your lungs? (Assume a total lung volume of 5.60 L.)

Answer:

Explanation:0.089mol

at STP 22.4l of any ideal gas is the volume of one mole which means the number of moles in 02 is222.4=0.089.

The correct answer is M^-1s^-1.

The proportionality constant in the rate law expression, known as the rate constant or the particular rate constant, represents the relationship between the rate of the reaction and the concentration of the reacting species. Because it equals the rate of the reaction when the concentration of the reactants is assumed to be unity, it is known as the specific rate constant. The speed and direction of a chemical reaction are measured by a reaction rate constant. We are aware that the values of the Rate constant vary with temperature.

The given rate law is:

Rate = k[A][B]

The units of rate are always Ms^-1 and the units of [a] are mol so: mol*s^-1

Putting the units in the given rate law:

Rate = k[A][B]

Ms^-1=k×(M)×(M)

k=Ms^-1/M^2

k=M^-1s^-1

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The oxidation number of the cobalt is +2 while the oxidation number of iron is +3.

According to the crystal filed theory, the ligands serve as point charges and when they are introduced to the symmetrical octahedral crystal field, the field splits and the there is a barry center with electrons that are above and below the barry center depending on their energy.

Hence, we can see that cobalt II ion is a d7 specie with electron configuration; [tex]1s^2 2s^2 2p^6 3s^2 3p^6 3d^7[/tex]. The iron III ion is a d5 specie having electron configuration[tex]1s^2 2s^2 2p^6 3s^2 3p^6 3d^5[/tex]. The oxidation number of the cobalt is +2 while the oxidation number of iron is +3.

The crystal field diagram of each of the ions is shown in the image attached.

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Answer:

down below

Explanation:

The police's influence can happen based on a response to a problem. An example is when the police are called because of a thief child. If the police handles the situation correctly-using reasonable force, if necessary, and reading them their rights- the public will perceive the police in a good light or way. If the police use gross misconduct and do not go by the book, then they will be perceived as an enemy or in a bad light or way.