Halogenated compounds are particularly easy to identify by their mass spectra because chlorine and bromine occur naturally as mixtures of two abundant isotopes. Chlorine occurs as 35Cl (75.8%) and 37Cl (24.2%); Bromine occurs as 79Br (50.7%) and 81Br (49.3%); Boron compounds also stand out owing to the two isotopes 10B (19.9%) and 11B (80.1%).

Required:
a. At what masses do the molecular ions occur for the following formulas?
b. What are the relative percentages of each molecular ion?

Two characteristics of a calorimeter that are necessary for successful heat measurement are good thermal insulation to minimize heat loss and a temperature measurement device to accurately measure temperature changes.

A calorimeter works by measuring the heat exchanged between two substances in a chemical or physical process. The substances are placed in the calorimeter and allowed to reach thermal equilibrium, and the temperature change of the system is measured to calculate the amount of heat transferred.

A bomb calorimeter is designed for measuring the heat of combustion of a substance in a sealed container under constant volume conditions, while a coffee cup calorimeter is a simpler design used for measuring the heat of reaction of a substance in an open container under constant pressure conditions. The bomb calorimeter is typically more accurate but also more complex and expensive to use.

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The structure of fatty acids involves long carbon-based chains with a carboxyl group (―COOH) located in the end, triglycerides phospholipids contain a phosphate group and glycerol, while steroids are cyclic and they contain C atoms linked via 4 fused rings.

Lipids are a broad category of biomolecules that include fatty acids, triglycerides phospholipids, and steroids. For example, fatty acids are long carbonated chains that contain exactly identical CH2 groups in the interior of the molecule and a carboxyl group (―COOH) located at one extreme side.

Triglycerides phospholipids are composed of three fatty acids chains linked to a glycerol backbone and also a phosphate group that may confer polar properties to the molecule.

Finally, steroids are another important class of lipids composed of several carbon-based fused rings.

Therefore, we can conclude that fatty acids, triglycerides phospholipids, and steroids are structurally different lipids that are mainly composed of carbon-based structures.

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Explanation:

The balanced equation is

2  H2        +    02 ======> 2 H2 O

so it takes twice as many H2 moles as O2 to complete the reaction

  the chemist does not have enough  H2 (needs 8 moles)   , so H2 is the limiting reactant .

The number of mole of tin (Sn) that you have is 0.058 mole

6.02×10²³ atoms = 1 mole of tin (Sn)

With the above information, we can obtain the number of mole ot tin. Details below

We can obtain the number of mole of tin as follow:

6.02×10²³ atoms = 1 mole of tin (Sn)

Therefore,

3.5×10²² atoms = (3.5×10²² atoms × 1 mole) / 6.02×10²³ atoms

3.5×10²² atoms = 0.058 mole of tin (Sn)

Thus, the number of mole of tin (Sn) you have is 0.058 mole

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Answer:

Filter it

Explanation:

Answer:

the bowling ball will move fastest

Explanation:

because it is heaviest

Explanation:

The reactant contains 2N and 6H

The product contains 2N and 6H

Therefore, the chemical equation is balanced

From the equation, for every 1 mole of N2 that reacts, 3 moles of H2 are required.

We know 28.6 grams of N2 reacted, but we don’t know the mass ratio but just the mole ratio, so we have to convert 28.6 grams of N2 to the corresponding moles of N2.

From the periodic table, the molar mass of N is about 14 g/mol, so the molar mass of nitrogen gas or N2 is two times of that which is 28 g/mol.

With this, we can calculate moles of N2, but we also need to make sure the equation is setted up the right way.

Looking at the units, if we cancel out the grams, we are left with mol. We also know that in multiplication, numerator of one number cancel with the denominator of another number and vice versa

So the equation looks like this 28.6g * mol/28g = 1.021 mol N2

So the number of moles of H2 required is 1.021 mol N2 * 3 mol H2/1 mol N2 = 3.063 mol H2 (notice that mol N2 canceled out, so the equation is set up correctly)

However, the question ask for number of grams of H2 needed, so we need the molar mass of hydrogen gas or H2, which is 1*2 = 2 g/mol

3.063 mol H2 * 2 g H2/ mol H2 = 6.126 g H2

Ans: 6.126 g H2

Answer:

$1246.90

Explanation:

Since the bike lost \(20%\)% of it's value and it now currently at $\($1039\), we have to do 20% * $1039 to find the amount of money lost. 20%*1039=207.8. We have to add it up to find the original value so 1039+207.8=$1246.8

(E, E)-3,5-octadiene, molecular formula is C8H14, molecular weight is 110.20,(3E,5E)-octa-3,5-diene is its IUPAC name.

What is IUPAC?

The International Union of Pure and Applied Chemistry (IUPAC) is a global federation of National Adhering Organizations dedicated to the progress of the chemical sciences, particularly through the creation of nomenclature and terminology. It is an International Science Council member (ISC).

What is the Molecular formula?

A molecule is made up of two or more atoms that have joined together chemically. A molecular formula is the chemical representation of a molecular compound that lists the types and quantities of atoms that make up each molecule.

Hence, the structure of the compound (E, E)-3,5-octadiene is in the image attached. The image is from Pubchem, National library of medicine (NCBI).

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Answer:

Explanation:

I am assuming that the 2.461 is in liters.

M=mol/liters

1) convert grams to moles

6.2 g x ( 1mole HCl / 36 g HCl) =0.172 moles

2) plug in the formula

M=0.172/2.461 = 0.06998 M HCl

Now if the 2.461 is not liters you need to convert them to liters,

Barium chloride turned from sparkly white into dull white during the heating process.

An inorganic substance with the formula BaCl2 is barium chloride. It is among the most popular barium salts that dissolve in water. Like the majority of some of the other water-soluble barium salts, is also white, extremely hazardous, and gives flames a yellow-green tint.

Among the most common barium salts is barium chloride. Bacl2 is hygroscopic and soluble in water. Deep hypokalemia, generalized muscle weakness, and eventually paralysis of the limbs and breathing muscles can occur within 1 to 4 hours of consumption.

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Answer:

Clear quartz-

Jasper-

Amethyst-

Explanation:

Rock Salt The elements in rock salt are not integrated into the salt's crystal grid, but cling to the outside surface and crevices of the crystalline structure. This is the fundamental difference between rock salt and crystal salt. A salt crystal manifests a superior structure.

Answer:

142.36 kg

Explanation:

volume of water in the lake = surface area x depth

= 18.5 x ( 1760 x 3 )² x 39 ft³

= 2.011 x 10¹⁰ ft³

= 2.011 x 10¹⁰ x 28.3168 liter .

= 56.945 x 10¹⁰ liter .

concentration of mercury = .25 x 10⁻⁶ g / liter

= 25 x 10⁻⁸ g / liter

= 25 x 10⁻¹¹ kg / liter

mass of mercury in the water of lake

= 25 x 10⁻¹¹ x 56.945 x 10¹⁰ kg

= 142.36 kg .

The process of photosynthesis and cellular respiration is usually at the barest minimum when drought occurs.

This is the process in which green plants manufacture their food through the presence of light energy from the Sun.

During drought, there is no water which reduces photosynthetic activity of plants. This leads to shortage of food thereby making bears to come into town in search of food.

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Answer:

The answer is 76.36 torr

Explanation:

using P1V1=P2V2

Since temperature did not change

P2=P1V1/V2

P2=262×21/75

P2=73.36 torr

Answer:

circulatory and excretory

According to the question, we are to categorize the definitions in the box as elements, compounds, or mixtures.

For ELEMENTS

• Since element,s consist of only one kind of atom,, hence they are ,substances made up of one type of particle (atoms or molecules)

• Since matter is anything that has mass and occupies space and is made up of substances called elements, hence, they are anything that has mass and volume

• Cannot be broken into simpler kinds, of matter since elements are made of atoms.

For COMPOUNDS

• Compounds can only be separated by chemical means but not by physical means. Hence we can say that ,compounds cannot be separated by physical means, but can be chemically

• Consists of atoms of two or more different elements bonded together

• Has properties unique to the element that makes it up

FOR MIXTURES

• Since the mixture consists of, two or more different elements ,and/or compounds physically, hence they can be separated by physical means.

• They can be separated into simpler types of matter by physical means and keeps the, properties of parts, that make it up.

Answer:

The correct answer is 0.61.

Explanation:

Based on the given information, a transferrin solution was titrated with a standard ferric solution. The blank absorbance was 0.04 and the absorbance of 10 ml solution of transferrin post supplementation of 6 ml titrant came out to be 0.65. The corrected optical density or absorbance can be determined by using the formula,

Corrected OD = Measured OD - Blank or Reference OD

Now putting the values we get,

Corrected OD = 0.65 - 0.04

Corrected OD = 0.61

Answer:

166.704

Explanation:

6Li + 1N2 -> 2Li3N

2KClO3 -> 2KCl + 3O2

1As4S6 + 9O2 -> As4O6 + 6SO2

1N2H4 + 2H2O2 -> 1N2 + 4H2O

1Al + 1C12 -> 1AlC13

A) The chemical symbol for the ion is Fe+

B) It has 20 electrons in total, and there are 6 3p electrons in the ion.

C) There are 6 electrons present in the 3p orbital.

The atomic cation with the given electron configuration is represented by the chemical symbol Fe+.

To determine the number of electrons in the ion, we need to count the electrons present in the electron configuration. In the given configuration, we can see that the 1s orbital has 2 electrons, the 2s orbital has 2 electrons, the 2p orbital has 6 electrons, the 3s orbital has 2 electrons, the 3p orbital has 6 electrons, the 3d orbital has 1 electron, and the 4s orbital has 1 electron. Adding up these numbers, we have:

2 + 2 + 6 + 2 + 6 + 1 + 1 = 20

Therefore, the ion has 20 electrons.

To determine the number of 3p electrons in the ion, we look at the 3p orbital. In this case, there are 6 electrons present in the 3p orbital.

In summary, the chemical symbol for the ion is Fe+, it has 20 electrons in total, and there are 6 3p electrons in the ion.

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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.

The prescription is for Oxacillin Sodium 900 milligrams with 125 mL D5W IV PB with a drop factor of 20 gtt/mL, to be administered over a 45-minute period.

The following equation can be used to determine how many hours the IV will need to finish before it runs out:Volume (mL) Drip Speed (mL/hour) = Time (hours).The IV pump is set to 62 mL/hour and the fluid volume is 1000 mL.

For infusions utilizing 10 dropping factor tubes (Continu-Flo Solution Set 2C8537), typical drips per minute:75mL/hr = 13 and 150mL/hr = 25 drops/min (12.5),droplets/min 125mL/hr = 21 (20.8),drops/min 50mL/hr equals 8 (8.3),drops/min 100mL/hr equals 17. (16.6),25 mL per hour times 4 (4.1) drops per minute,For one whole minute, count:,Just a dribble!

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Sound Waves require a medium

Answer:

i would  say sound waves

Explanation:

Answer:

65.0 K

Explanation:

To find the temperature, you need to use the Ideal Gas Law:

PV = nRT

In this equation,

-----> P = pressure (pKa)

-----> V = volume (L)

-----> n = moles

-----> R = Ideal Gas Constant (8.31 L*kPa/mol*K)

-----> T = temperature (K)

You can plug the given values into the equation and simplify to find the temperature.

P = 202.65 pKa                          R = 8.31 L*kPa/mol*K

V = 2.0 L                                     T = ? K

n = 0.75 moles

PV = nRT

(202.65 pKa)(2.0 L) = (0.75 moles)(8.31 L*kPa/mol*K)T

405.3 = (6.2325)T

65.0 K = T

pH is given by the following:

Answer: B) 4.0x10^-4M

The theoretical yield of NH₃ produced under the given conditions is 11.75 g.

The balanced equation for the reaction between hydrogen (H₂) and nitrogen (N₂) to form ammonia (NH₃) is;

N₂ + 3H₂ → 2NH₃

To determine the theoretical yield of NH₃ produced from the given amounts of H₂ and N₂, we need to calculate the limiting reactant and then use stoichiometry to find the maximum amount of NH₃ which can be produced.

The molar masses of H₂, N₂, as well as NH₃ are;

H₂; 2.02 g/mol

N₂; 28.02 g/mol

NH₃; 17.03 g/mol

The number of the moles of each reactant will be calculated as;

moles of H₂ = mass of H₂ / molar mass of H₂ = 1.40 g / 2.02 g/mol = 0.693 mol

moles of N₂ = mass of N₂ / molar mass of N₂ = 9.66 g / 28.02 g/mol = 0.345 mol

To determine the limiting reactant, we need to compare the mole ratios of H₂ and N₂ in the balanced equation with the actual mole ratios of the reactants. The balanced equation shows that 1 mole of N₂ will reacts with 3 moles of H₂ to produce a 2 moles of NH₃. The actual mole ratio of N₂ to H₂ in the reaction mixture is;

moles of N₂ / moles of H₂ = 0.345 mol / 0.693 mol

= 0.498

This ratio is less than the required ratio of 1/3, which means that N₂ is the limiting reactant. This means that all the N₂ will be consumed in the reaction and the amount of NH₃ produced will depend on the amount of N₂ present.

Using the mole ratio from the balanced equation, we can calculate the theoretical yield of NH₃ that can be produced from the 0.345 mol of N₂;

moles of NH₃ = (0.345 mol N₂) × (2 mol NH3 / 1 mol N₂)

= 0.690 mol NH₃

The mass of this amount of NH₃ can be calculated as;

mass of NH₃ = moles of NH₃ × molar mass of NH₃ = 0.690 mol × 17.03 g/mol = 11.75 g

Therefore, the theoretical yield is 11.75 g.

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An example of heterogeneous equilibrium is:

Heterogeneous equilibrium refers to an equilibrium state in a chemical reaction where the reactants and products exist in different physical states or phases. It occurs when substances in different phases, such as solids, liquids, and gases, are involved in a chemical reaction.

Considering the given equations:

The equation I: FeO(s) + CO(g) ⇌ Fe(s) + CO₂(g) represents a heterogeneous equilibrium.

This is because the reactants and products involve different phases (solid and gas). FeO is a solid (s), CO is a gas (g), Fe is a solid (s), and CO₂ is a gas (g). The reaction involves the conversion of a solid and a gas to another solid and a gas, and the equilibrium is established between these different phases.

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