On the periodic table, Nitrogen has 7 what?

Answers

Answer 1

Answer:

[tex]\boxed {\boxed {\sf 7 \ protons}}[/tex]

Explanation:

On the Periodic Table, Nitrogen is:

A nonmetalIn group 15 and period 2 With an atomic mass of 14.007 amu With the atomic number 7

In elements, their atomic number is also equal to the number of protons. As the number of protons in an atom change, so does the identity of the atom.

Since nitrogen has an atomic number of 7, it must always have 7 protons


Related Questions

Cs(s)+HBr(aq)= what is the answer

Answers

Explanation:

Cs(s)+HBr(aq)=H(g)+CsBr(aq)

Which of the following quantities is equivalent to 3.7 cm?
A. 3.7×10⁻⁵ km
B. 3.7×10⁵ μm
C. 3.7×10⁻² mm
D. 3.7×10² mm
E. 3.7×10⁻³ m

Answers

Answer:

A. 3.7×10^-5 km

Explanation:

Whenever there is scientific notation, you always move the decimal the amount of places that the exponent tells you. For a, you would move the decimal 5 times to the left and the km version will be equivalent to the cm version. I hope this helps!

The quantity is equivalent to 3.7 cm is  3.7×10⁻⁵ km. Therefore, option A is correct.

What do you mean by the scientific notation ?

The term scientific notation is defined as a way of writing very large or very small numbers. A number is written in scientific notation when a number between 1 and 10 is multiplied by a power of 10.

For example, 650,000,000 can be written in scientific notation as 6.5 ✕ 10^8.

Scientific notation is used to simplify numbers that are too big.

In the scientific notation, you always displace the decimal the amount of places that the exponent tells you. Then would move the decimal 5 times to the left and the km version will be equivalent to the cm version.

Thus, The quantity is equivalent to 3.7 cm is  3.7×10⁻⁵ km, option A is correct.

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Do you consider comparing consumer products on the basis of their components for use, safety, quality, and cost?

Answers

Comparing consumer products on the basis of their components like use, safety, quality, and cost is necessary as it creates awareness about the product among consumers.

Consumer Products - It is a kind of product that is bought by individuals for personal use or consumption. These are the end products or final goods reached to the end-user i.e consumer by retailer via various distribution channels. Ex- grocery, clothing, etc.

Marketing strategies are built based on different market segmentation and types of consumer products available to the target market.

Types of Consumer Products

There are four types of consumer products, they are:-

Convenience Products

Shopping Products

Specialty Products

Unsought Products.

Hence, it is necessary to compare consumer products on basis of the components like use, safety, quality, and cost. It also increases the competition as well as creates awareness among consumers.

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BUFFERS BUFFERS AND BUFFER CAPACI
INTRODUCTION
LABORATORY SIMULATION
How to calculate the pH of a buffer solution
1) Calculate the pH of a solution prepared by dissolving 2.05 g of sodium acetate, CH3COONa, in 50.0 mL of 0.25 Macetic
acid, CH3COOH(aq). Assume the volume change upon dissolving the sodium acetate is negligible. K₂ of CH3COOH is
1.75 X 10.5.
pH =

Answers

The pH of the solution prepared by dissolving sodium acetate and acetic acid is 5.05.

Given -

CH3COONa = 2.05g

So, Number of moles of CH3COONa = 2.05 / 82.03 = 0.024

Molarity = 0.024  / 0.05

                = 0.48 M

and CH3COOH =  0.25 M  

pH of buffer - The equilibrium constant (Ka) of the weak acid and the ratio of weak base (A-) to weak acid (HA) in solution are the two variables that determine the pH of a buffer.

1) Various weak acids have different equilibrium constants (Ka).

2) Ka tells us how much of the HA in the solution will be dissolved into H+ and A-.

According to the question -

CH3COOH ⇄ CH3COO⁻ (aq) + H⁻ (aq)

Ka = [CH3COO⁻] [H⁺] /  {CH3COOH]

 [H⁺] = Ka x [CH3COOH] / [CH3COO⁻]

[H⁺] = 1.75 x 10⁻⁵ [0.25] / [ 0.48]

[H⁺] = 0.43 x 10⁻⁵ / 0.48

      = 0.89 x 10⁻⁵

pH =  -log [H⁺]

∴ pH = - log [0.89 x 10⁻⁵]

pH =  5.05

Hence, the pH of the solution will be 5.05.

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(objectives & conclusion) why it is necessary to know the different apparatus in the laboratory and how to do it

Answers

It is important to know the different apparatus in the laboratory and how to do it because these apparatus are handled carefully, and the experiment is done very carefully to avoid any mistakes.

What is a laboratory?

A laboratory is a place where all scientific apparatus and instruments are put and experiments are done. These places are kept safe and hygienic and all experiment is done precisely to get results.

Thus, knowing the various lab equipment and how to utilize it is crucial because errors might happen during experiments because of how carefully this equipment must be handled.

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A chemist is called by the highway patrol to identify a clear colorless liquid that was spilled on the freeway. What tests could the chemist do to identify whether the liquid is a mixture or a substance?

Answers

A chemist is called by the highway patrol to identify a clear colorless liquid that was spilled on the freeway. The test chemist could do to identify whether the liquid is a mixture or a substance is melting point.

If it is to be identified that whether a liquid is a mixture or a pure substance, testing the melting point is preferably considered.

Melting point is a a range of temperature of a substance from which the first crystal starts melting.

Pure substances have sharp melting point but an impure substance or a mixture melts over a given range of temperature.

By looking at the overall composition, pure substance and mixture can be identified visually but it is quite difficult in case of a clear, colorless liquid.

Therefore, melting points can be used to find out whether a liquid is a mixture or a substance.

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See attached. Thank you very much!!! :)

Answers

The functional groups that are present the compound is shown in the image is;

HaloalkaneAlkeneAmine

What is the functional group?

The functional group is the atom, group of atoms or bond that is responsible for the chemical reactivity of the members of a particular family of organic compounds. We have to note that there are several families of organic compounds and the reactivity of these families is determined mostly by the kind of functional group that we have in that particular molecule.

Now we have the structure that has been shown in the image attached. We now have to look at the image and determine the kind of functional groups that we have in the molecule. In this case, we are actually looking out for the very points along the chain where a chemical reaction is possible.

We can see that the functional groups that we have here are;

HaloalkaneAlkeneAmine

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Compare the compressibility of gases and liquids. Support your answer by describing the arrangement of particles in gases
and liquids.

Answers

The compressibility of gases is more difficult than that of liquids. Because, the intermolecular forces in gases is very less and to compress the diffused gas molecules high pressure have to be applied.

What is compressibility ?

Compressibility of a substance is the ability to compress to decrease its volume under high pressure. It is dependent on the intermolecular force in the substance.

In liquids unlike solids there is some space for the particles to move apart and that is why liquid can flow. In the case of gases, this distance between particles is greater and particles are free to spread everywhere. Therefore, the intermolecular attraction is very less in gaseous substances.

To compress the substance, the force of attraction between particles have to be increased and volume have to be decreased.  Therefore, it is too difficult to compress gases, in which particles are far apart from each other.

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pleeeeeaaseeeee heeeelpppp

Answers

Answer: I think it's C

Explanation:

Probably wrong. I have a different type of chemistry.

Question 2 (3 points)
What is the empirical formula for a compound that contain 1.011 g of chromium and 0.467 g of oxygen. ?

Answers

Chromium oxide's empirical formula is Cr₂O₃

The simplest whole-number ratio of atoms in a compound is the empirical formula. The proportion of atoms to moles is the same. Our task then is to determine the molar ratio of Cr to O.

Cr's mass is 7.35 g.

10.74 g of chromium oxide are equal to 10.74 g of chromium and 10.74 g of oxygen.

O's mass is 10.74 g - 7.35 g, or 3.39 g.

Moles of Mg = 52.00 g Mg = 0.1413 mol Mg/7.35 g Mg = 1 mol Mg

Moles of O equal 3.39 g O to 1 mol O and 16.00 g O to 0.2119 mol O

For every 3 mol of O, there are 2 mol of Cr.

Chromium oxide's empirical formula is Cr₂O₃.

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the ph of a 0.04 M Calcium hydroxide is

Answers

The pH of a 0.04 M Calcium hydroxide solution is 1.39.

How to calculate pH?

pH refers to the degree of alkalinity and acidity of a solution.

It is the quantitative measure of the acidity or basicity of a solution. The term "pH" is used in chemistry to denote the values of the concentration of the hydrogen ion {H+}.

The pH scale runs from 0 to 14 where; a value of seven is considered neutral, less than seven acidic, and greater than seven basic.

To calculate the pH of an aqueous solution, one needs to know the concentration of the hydronium ion in moles per liter (molarity).

The pH of a solution can be calculated as the negative logarithm of a concentration or molarity as follows:

pH = - log {H+}

According to this question, a 0.04 M calcium hydroxide is given. The pH can be calculated as follows:

pH = - log {0.04}

pH = 1.39

Therefore, the pH of a 0.04 M calcium hydroxide solution is 1.39.

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What is the volume of a rectangular
object with length 17 cm, width 11 cm,
and height 6 cm?

Answers

Answer:

1122 cm cubed

Explanation:

The formula for volume of a rectangle would be length times height times width, so just do 17 * 11 * 6 to get your answer, which should be 1122 with units of cm cubed, or cm^3.

Hope this helps! Let me know if you have any confusion!

!!!!PLS HELP IM TIMED!!!!!!

Shonda's car gets an average of 27 miles per gallon. Gas costs $2.25 per gallon and she drives 892 miles to get from Baltimore, MD, to Orlando, FL. What are the conversion factors she could use to calculate the cost of gas to get from Baltimore to Orlando? How much will she spend on gas?

Answers

Answer:

74.25

Explanation:

27 miles = 1 gallon

1 mile = 1/27 mile

Distance to cover = 892 miles

We will multiply this number with gallons of gas used for 1 mile.

892 miles = 1/27 * 892

892 miles = 33.04 gallons of gas

Rounding off to nearest whole number;

892 miles = 33 gallons

Cost of one gallon of gas = $2.25

Cost of 33 gallons = 2.25*33 = $74.25

She will spend $74.25 on gas.

An intermediate step in the industrial production of nitric acid involves the reaction of ammonia with oxygen gas to form nitrogen monoxide and water. How many grams of nitrogen monoxide can form by the reaction of 507 g of ammonia and 845 g of oxygen?
g nitrogen monoxide

Answers

Taking into account the reaction stoichiometry, 633.75 grams of nitrogen monoxide can form by the reaction of 507 g of ammonia and 845 g of oxygen

Reaction stoichiometry

In first place, the balanced reaction is:

4 NH₃ + 5 O₂ → 4 NO + 6 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

NH₃: 4 molesO₂: 5 molesNO: 4 molesH₂O: 6 moles

The molar mass of the compounds is:

NH₃: 17 g/moleO₂: 32 g/moleNO: 30 g/moleH₂O: 18 g/mole

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

NH₃: 4 moles× 17 g/mole= 68 gramsO₂: 5 moles× 32 g/mole= 160 gramsNO: 4 moles× 30 g/mole= 120 gramsH₂O: 6 moles× 18 g/mole= 108 grams

Limiting reagent

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. This means the when the limiting reagent is finished, the chemical reaction will stop.

Limiting reagent in this case

To determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 68 grams of NH₃ reacts with 160 grams of O₂, 507 grams of NH₃ reacts with how much mass of O₂?

mass of O₂= (507 grams of NH₃×160 grams of O₂)÷ 68 grams of NH₃

mass of O₂= 1,192.94 grams

But 1,192.94 grams of O₂ are not available, 845 grams are available. Since you have less mass than you need to react with 507 grams of NH₃, O₂ will be the limiting reagent.

Mass of nitrogen monoxide formed

The following rule of three can be applied: if by reaction stoichiometry 160 grams of O₂ form 120 grams of NO, 845 grams of O₂ form how much mass of NO?

mass of NO= (845 grams of O₂×120 grams of NO)÷ 160 grams of O₂

mass of NO= 633.75 grams

Finally, 633.75 grams of nitrogen monoxide can form by the reaction of 507 g of ammonia and 845 g of oxygen.

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Assume the specific heat of the solution is equal to the specific heat of water

Answers

When we assume the specific heat of the solution is equal to the specific heat of water ΔHdissolution is 27×10⁻⁵

A calorimeter is a device used for heat measurements necessary for calorimetry

Here given data is 4.79g = KBr and are dissolved in 109.00g water and temperature is 21.08°C and according to calorimeter heat of capacity = 1.84 J/°C

We have to calculate enthalpy of dissolution of KBr = ?

ΔHdissolution = 27×10⁻⁵

KBr+H₂0→KBr ΔH=?

qreaction = -qcal

1.79×1.84(-2.4) = 0.8936 J

1000 = -0.0008936

4.79+109.00 = 522.11 g

qcal = 522.11 g×1.84(-2.4) = -2305 J

qreaction = -qcal = -2305 J

n(KBr) = 4.79/74.55gmol⁻¹ = 0.0642mol

2305/ 0.0642mol = 0.00002787mol⁻¹

= 27×10⁻⁵

ΔHdissolution = 27×10⁻⁵

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Describe one way in which energy is transferred when magnesium combusts

Answers

exothermic reaction

Explanation:

When magnesium reacts with oxygen, it produces light bright enough to blind you temporarily. Magnesium burns so bright because the reaction releases a lot of heat. As a result of this exothermic reaction, magnesium gives two electrons to oxygen, forming powdery magnesium oxide (MgO).

Convert 167 mL/h to units of liters per day. Show the unit analysis by dragging the conversion factors into the unit-factor slots.

Answers

On converting 167 mL/h , we get 4.008 L/d

Converting 167 mL/h to units of liters per day

1L=1000mL

1d=24hrs

So  167 mL/1h x1L/1000mLx24h/1d=4008L/1000d

=4.008 L/d

Unit conversion is the process of converting the measurement of a given amount between various units, often by multiplicative conversion factors that alter the value of the measured quantity without altering its effects.Unit conversion is a multi-step procedure that includes rounding, selecting the appropriate number of significant digits, and multiplying or dividing by a numerical factor.The conversion from one unit to another in order to ensure accuracy and prevent measurement misunderstanding.

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determine the formula weight of Nh4f to two decimal places

Answers

Formula weight of NH4F is 37.037 g/mol

What is formula weight ?

The total of the atomic weights in the empirical formula of the compound is the formula mass, often referred to as formula weight, of a molecule. Atomic mass units are used in the formula for weight (amu)

We will choose the atomic mass of each element in the compound from the periodic table, multiply by the number of atoms, then add the result to determine the formula weight.

The total atomic weights of the atoms in a molecule's empirical formula make up the formula mass (formula weight) of that molecule. The average mass of a molecule is determined by combining the atomic weights of all the atoms in the molecule to determine its molecular mass (molecular weight).

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The monomers of proteins are called amino acids. Draw the protein amino acid alanine and label the central carbon, the amino functional group, the carboxyl functional group, and the methyl functional group. Be sure to show ALL of the atoms within the molecule (Alanine has the molecular formula C3H7NO2). Draw a second amino acid of your choice (glycine is the simplest amino acid to draw).

Answers

Hi how has your day been going?

Solid zinc(II) sulfide reacts with aqueous hydrobromic acid (HBr) to form aqueous zinc(II) bromide and dihydrogen sulfide gas.

Answers

The equation of the double displacement reaction is:

ZnS (s) + 2 HBr (aq) → ZnBr₂ (aq) + H₂S (g)

What type of reaction occurs between solid zinc(II) sulfide reacts with aqueous hydrobromic acid (HBr)?

The reaction between solid zinc(II) sulfide reacts with aqueous hydrobromic acid (HBr) is an example of a double displacement reaction.

In the reaction, bromide ion from the hydrobromic acid and the sulfide ion from the zinc sulfide both displace each other from their respective positive ions to form new products. The products formed are aqueous zinc(II) bromide and dihydrogen sulfide gas.

The equation of the double displacement reaction is given below:

ZnS (s) + 2 HBr (aq) → ZnBr₂ (aq) + H₂S (g)

The zinc sulfide exists as a solid whereas the hydrobromic acid is an aqueous solution. The zinc (ii) bromide formed exists as an aqueous solution whereas dihydrogen sulfide is a gas.

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Note that the complete question is given below:

Solid zinc(II) sulfide reacts with aqueous hydrobromic acid (HBr) to form aqueous zinc(II) bromide and dihydrogen sulfide gas.

Express your answer as a chemical equation. Identify all of the phases in your answer.

what is an hydroxide solution commonly used in labs​

Answers

sodium hydroxide (NAOH) a.k.a causic soda commonly used in labs​.

MOLAR MASS of naoh is 39.997 g/mol.It is dry hard brittle, white stocks in large fused opaque white-stone like masses having a dense crystalline fracture in small pellets/flakes.it is very delinquent  and one of the strongest base , acts as a saponifying agent which is used in industrial purposes.It is an important industrial chemical as it is used on its own and is also used as a raw material in the production of other chemicals. The basis for the production of sodium hydroxide is the electrolysis of brine.

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Answer: Sodium hydroxide (NaOH), also known as caustic soda or lye, is a highly versatile substance used in a variety of manufacturing processes.

Explanation: For Example: Sodium hydroxide is also the most common base used in chemical laboratories, being able to test for quite a number of cations (this is called Qualitative Inorganic Analysis), as well as to provide alkaline mediums for some reactions that need it, such as the Biuret test.

Now i know that each of the 3 main layers of earth has its own features,as follows….

Answers

The 3 main layers of earth has its own features, as follows;

The Crust: this is seen as the outer layer and this is where humans as well as animals live and plants develop.The Mantle: is seen as the semi-solid magma layer that is made up of iron, magnesium, as well as  silicon.The Core: is known to be centrally made up of solid mass of metal ( and it has an inner core) as well as a liquid mass of iron/nickel (which is the outer core).

What is the full meaning of Earth?

The earth is known to be a kind of  fragmental particles that are made up of different part of the surface of the globe.

Note therefore, The 3 main layers of earth has its own features, as follows;

The Crust: this is seen as the outer layer and this is where humans as well as animals live and plants develop.The Mantle: is seen as the semi-solid magma layer that is made up of iron, magnesium, as well as  silicon.The Core: is known to be centrally made up of solid mass of metal ( and it has an inner core) as well as a liquid mass of iron/nickel (which is the outer core).

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A CHM 111 student completing Part B recorded the mass of several pieces of dry metal as
23.7412 g.He obtained a graduated cylinder and recorded an initial water volume of 25.0 mL
upon addition of the metal pieces, the water level rose to 27.1 mL
Calculate the density of the metal in units of grams per milliliter. Report only the numerical portion of your answer (and watch your significant figures!).

Answers

The density of the metal in units of grams per milliliter is 11.31 g/mL

What is density?

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

How to determine the density of the metal

The following data were obtained from the question:

Mass of metal = 23.7412 gVolume of water = 25 mL Volume of water + metal = 27.1 mL Volume of metal = 27.1 – 25 = 2.1 mL Density of metal =?

Density = mass / volume

Density of metal = 23.7412 / 2.1

Density of metal = 11.31 g/mL

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C. In what orbital is an electron located that has quantum numbers of: n = 5, 1= 0, m₁ = 0, ms=-1? (1
point)

Answers

The electron is in the 5s orbital.

What is an orbital?

The term orbital is the region in space where there is a high probability of finding an electron. There are four quantum numbers that define an orbital and these are;

Principal quantum number

Orbital quantum number

Spin quantum number

Magnetic quantum number

Let us now look at the sets of quantum numbers as given, a look at the principal and the orbital quantum numbers (m and l) tell us that the electron is in the 5s orbital.

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1. How many grams was each person's final serving of 1 burger?
Each person in the group gets two Burgers. (To Solve this Assume 4 persons per VIRTUAL group)
group)
(Key: 1 Pound = 453 grams; **burgers lose approximately 10% of their weight during
cooking.)

Answers

As per conversion units, 45.3 grams is each person's final serving of 1 burger.

As 1 burger has a weight of 1 pound which is equal to 453 grams ,and as each burger looses 10% of it's weight while cooking .

So the weight of 1 burger after cooking is,

10/100×453=45.3 g

Thus,each person's final serving of 1 burger is 45.3 grams.

What are conversion units?

Conversion  units or unit conversion expresses the same property with a different unit of measurement.It is a numerical expression or a number that is used to change  one set of units to another.

It usually occurs through multiplicative conversion factors through which the measured quantity is changed without changing it's effects.

There are different conversion systems such as:

1) SI system

2)CGS system

3)MKS system

4) FPS system

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How many moles at gold (Au) atoms are in 87-89 of Au ​

Answers

The calculated answer is 1.99 x 10/21 x Au

Gold has a molar mass of 196.96657 g/m. The mass of 1 mole of gold atoms, which is commonly given in grams, is referred to as the molar mass of gold.

Divide the specified mass by the molar mass of gold, which is 196.966569 g/mol, to determine the moles.

The term "atomic weight" refers to an atom's overall weight. With the addition of a small amount from the electrons, it is roughly equal to the sum of the protons and neutrons. The number of neutrons an atom has has a significant impact on the stability of the nucleus and, consequently, the radioactivity of the atom. The average mass of an element's atoms expressed in atomic mass units is known as its atomic mass (amu, also known as daltons, D). Gold has a molar mass of 196.96657 g/m. The mass of 1 mole of gold atoms, which is commonly given in grams, is referred to as the molar mass of gold.

Divide the specified mass by the molar mass of gold, which is 196.966569 g/mol, to determine the moles.

(Atomic weight in g/mol on the periodic table).

0.00330 mol = 0.650 g Au = 196.966569 gmol Au Gold atoms 1 mole of atoms is equal to 6.02210/23 atoms.

double the estimated mol Au by several.

6.022×10/23 atoms1mol.

0.00330mol Au = 6.022 x 10/23 x 1 mol

= 1.99 x 10/21 x Au

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Because of increasing evidence of damage to the ozone layer, chlorofluorocarbon (CFC) production was banned in 1996. However, many older cars still have air conditioners that use CFC-12 (CF2Cl2). These air conditioners are recharged from stockpiled supplies of CFC-12. Suppose that 100 million automobiles each contain 1.0 kg of CFC-12 and leak 24 % of their CFC-12 into the atmosphere per year.

How much chlorine, in kg , is added to the atmosphere each year due to these air conditioners?

Answers

The mass of chlorine is 9.9 * 10^6 kg.

Total mass of CFC = M(CFC) * number of cars = 1.0 kg * 1.00 * 10^8

= 1.00 * 10^8 kg

Mass of the leaked CFC ;

% leaked = m(leaked) *100 / m(total)

m(leaked) = o.24 * 1.00 * 10^8 kg

m(leaked) = 2.4 * 10^6 kg

Now no. of moles of CFC:

n(CFC) = m(CFC) / MM(CFC) = 2.4 * 10^9 g / 170.92 g/mol = 0.014 * 10^9 mol

= 1.4 * 10^7 mol

No. of moles of chlorine ;

n(Cl) = n(CFC)*2

= 1.4  * 10^7 mol *2

= 2.8 * 10^7 mol

Now at last the mass of the chlorine :

m(Cl) = n(Cl) * MM(Cl)

= 2.8 * 10^7 mol * 35.453 g/mol

= 99.2 * 10^10 g

Mass of Cl = 9.9 * 10^6 Kg

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Specify the hybridization at the atoms labelled a-d.

For each atom enter one of the following: sp3, dsp2, sp2, sp3d, or sp.

Answers

The orbitals where you can find each of the bonds;

a - sp3

b - sp3

c - sp2

d- sp3

What is hybridization?

The term hybridization is the term that is used to describe the mixture of atomic orbitals which can be used to combine with other orbitals of relevant energy.

Let us recall that in some cases, the energy that is required in bonding could only be obtained by the hybridization of orbitals in which orbitals are mixed. The mixed orbitals are orbitals that are very close to each other in energy and help in the formation of bond.

Now let us try to write the orbitals where you can find each of the bonds;

a - sp3

b - sp3

c - sp2

d- sp3

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Is atomic radius a periodic property of atoms?

Answers

Major periodic trends include atomic radius, ionization energy, electron affinity, electronegativity, valency and metallic character.

7.801x|02 please I need the answers asap

Answers

Answer:

795.702

Explanation:

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