you run a reaction which will make ammonia (nh3) as a product. you predict that you should make 8.41 x 1024 molecules of ammonia in your reaction. how many grams of ammonia will you make if your prediction is correct?

Answer:

Explanation:She was wrong

The molar mass of the substance is needed to convert between the moles of a given sample of a substance and its mass in grams.

A compound's molar mass, which is measured in grams per mole, specifies how much of a given material weighs in one mole. In other terms, the molar mass is the sum of the masses of all the atoms that make up a mole of a certain molecule, expressed in grams. As a result, the molar mass is measured in grams/mole.

The compound's molar mass is expressed in grams per mole, or g/mol. The mass of 1 mol, expressed in the SI as g/mol, is the definition of the molar mass. Example: Water has a molar mass of 18.016 g/mol.

Thus, The molar mass of the substance is needed to convert between the moles of a given sample of a substance and its mass in grams.

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The complete question is as follows:

What quantity is needed to convert between the moles of a given sample of a substance and its mass in grams?

a the molar mass of the substance

b the density of the substance

с the physical state of the substance

d all of the above

The mole fraction of sulfur hexafluoride gas X(SF₆) = 0.361 and the mole fraction of dinitrogen difluoride gas X(N₂O) = 0.639

moles of each gas

n = m / M

where,

n: moles and m: mass, M: molar mass

SF₆: 16.7 g / 146.06 g/mol = 0.114 mol

N₂O: 8.88 g / 44.01 g/mol = 0.202 mol

The total number of moles is 0.114 mol + 0.202 mol = 0.316 mol

To calculate the mole fraction of each gas

X = moles of gas / total number of moles

X(SF₆) = 0.114 mol / 0.316 mol = 0.361

X(N₂O) = 0.202 mol / 0.316 mol = 0.639

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Colligative qualities include boiling point elevation, freezing point depression, and vapor pressure reduction. Color and density are non-colligative qualities.

Colligative qualities are those that rely on the number of particles of solute rather than the composition of the solute.

An example of a colligative property:

Reduced vapor pressure

Boiling point at an elevation

a drop in the freezing point

The osmotic pressure

Non-colligative qualities are those that are determined by the nature of the solute and solvent.

Non-colligative qualities include:

Viscosity

The surface tension

Density

Solubility

As a result, we may deduce that boiling point elevation, freezing point depression, and vapor pressure reduction are all colligative qualities. Color and density are also non-colligative qualities.

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Air pressure is D.low at the top hight at the bottom.

Pressure is the force that the air applies to the ground when gravity acts on it. At sea level, there is typically a pressure of 1013.25 millibars, or 14.7 pounds per square inch.

High pressure frequently heralds sunny, dry weather. Clouds and precipitation are frequently indicative of low pressure. Air that is sinking is related with high pressure. Because it is pushing DOWN on the ground, air pressure is higher.

High barometric pressure exerts additional pressure against our bodies, which restricts how much tissue can expand. On the other hand, when air pressure is low, our body's tissues can expand more, which results in more pressure.

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The IUPAC name of the given compound is option A)  4-hydroxy-3-methylbutanoic acid

The International Union of Pure and Applied Chemistry (IUPAC) nomenclature of organic chemistry is a system for naming organic chemical compounds in chemical nomenclature (IUPAC). It appears in the Blue Book, also known as the Nomenclature of Organic Chemistry. Every potential organic molecule should ideally have a name that can be used to generate a clear structural formula. Inorganic chemistry has its own IUPAC terminology as well.

Except when it is required to provide a compound an unambiguous and absolute definition, the official IUPAC naming rules are not usually followed in practice because it is preferable to avoid verbose and tiresome names in everyday communication. Sometimes, IUPAC names are shorter than earlier terms, for as when ethanol is used in place of ethyl alcohol.

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Mass percent of Sodium Chloride solution prepared by mixing is 21.875%.

A mixture is a chemical substance comprised of two or more unrelated chemical components. A mixture is a physical combination of two or more distinct substances that can take the form of solutions, suspensions, or colloids. Solutions of salt and water are an example of a homogeneous mixture, whereas sand and water and oil and water are instances of heterogeneous mixtures.

Density of Water = 1g/mL

So, 125 mL of water weighs 125g

Mass of [tex]NaCl[/tex] = 35.0g

Total mass of solution = 125g+35g = 160g

Mass % of [tex]NaCl[/tex] =(Mass of [tex]NaCl[/tex] / Total Mass ) × 100

                         = (35/160) × 100

                          = 21.875%

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Answer:

salad

Explanation:

The number of moles of hydrogen atom in 6.4g of methane CH4 is 0.4 moles.

To find the number of moles of hydrogen atoms in 6.4 g of methane (CH4), we need to know the molar mass of methane and use the formula for converting mass to moles:

moles = mass / molar mass

The molar mass of methane is 16.04 g/mol, so we can plug in the values and solve:

moles = (6.4 g) / (16.04 g/mol)

moles = 0.4 moles

There are 0.4 moles of hydrogen atoms in 6.4 g of methane. This is because methane is a compound made up of one carbon atom and four hydrogen atoms, and the number of moles of a compound is equal to the total number of moles of all the atoms in the compound.

Since there are four hydrogen atoms in each mole of methane, there are also 0.4 moles of hydrogen atoms in 0.4 moles of methane.

The connections to the different amino acids in a protein are through peptide bonds.

Amino acids are the basic monomer units that proteins are composed of.

Hence, proteins are polymers of monomeric units called amino acids.

Amino acids have a basic structure where a chiral carbon atom is bonded to four different groups.

The four groups present in amino acids are:

Amino acids in proteins are linked to each other by means of peptide bonds. The peptide bond is formed from an amino group and a carboxyl group with the removal of a water molecule.

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Chemical analysis shows that the oxygen-carrying protein hemoglobin is 0.34 percent Fe by mass. the actual molar mass of hemoglobin is about 65000g. There are Fe atoms in one molecule of hemoglobin

Hemoglobin efficiently transports oxygen from the lungs to the body's tissues. Additionally, it helps in the return of carbon dioxide and hydrogen ions to the lungs. For the creation of blood, iron is crucial. Red blood cells and muscle cells contain about 70% of the iron in our bodies. Given the information, we may conclude that:

Mass of Fe in hemoglobin = 0.34% of molar mass of hemoglobin

Mass of Fe in hemoglobin = 0.34% of 65000

                    = (0.34 x 65000) / 100

                    = 221 g/mol

We now understand that the molecular weight of iron (Fe) is 55.85 g/mol.

Therefore, the quantity of iron in hemoglobin divided by the molecular mass of iron gives the amount of iron in 1 mole of hemoglobin.

                                  = 221/55.85

                                  = 3.957, which is approximately equal to ‘4’

In line with this, 1 molecule of hemoglobin has 4 Fe atoms in it.

The right response is hence "4".

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Answer:

F

Explanation:

Answer:One BTU is defined as the amount of energy required to raise the temperature of  1 lb of water through 1 degree Fahrenheit

Explanation:

answer: strontium is more reactive

steps:

strontium is heavier &

strontium is bigger, so

strontium would lose its 2 outer electrons more easily than calcium

strontium is more reactive

reactive means how easily an atom loses or gains electrons

in the periodic table :

rows are called periods

columns are called groups

strontium & calcium are both in the same column

strontium & calcium are both in group 2

strontium is chemically similar to calcium

group 2 elements can lose two electrons

group 2 metals tend to have a +2 charge

group 2 is called alkaline earth metals

factoid : radioactive strontium has been found in many bones from nuclear testing in the 1950s

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The material with the lower boiling point vaporizes first when heated, then condenses and collects.

The heat that is generated during the condensation process of higher boiling vapor is what leads to the process of vaporization. Because it has such a huge surface area, the packing enables vapors to move freely between the ascending and descending directions. In the process of evaporation, the vaporization happens at a temperature lower than the boiling point, whereas in the distillation process, the vaporization happens at the boiling point.

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The type of hybridization for the central atom in each compound is as follows ; Initially we can determine the precise hybridization of each of the mentioned atoms by examining the structures of each molecule.

When we look at ClNO, we can see that the nitrogen atom is linked to chlorine by a single bond while also maintaining a lone pair on oxygen by double bonds. The nitrogen is therefore in a sp2 hybridized form.

As is expected for ClOCl, the molecule has two lone pairs on the oxygen atom and an sp3 hybridized oxygen atom connected to two chlorine atoms.

The carbon atom in NCOH is sp2 hybridized because it is doubly linked to oxygen.

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Scientists improved Mendeleev’s early periodic table by using atomic number instead of atomic mass to organize the elements. Option C

We know that the periodic table is the arrangement of the elements by the use of a definite sequence. The order of the arrangement of the elements would be determined in a given manner.

In the Mendeleev’s periodic table, the arrangement of the elements was on the basis of the masses of the elements. This method did not produce a consistent pattern for all the elements.

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Answer:using atomic number instead of atomic mass to organize the elements

43.312 mL of 2.50M HCl is required to react with zinc single displacement reaction occurs.

Hydrogen gas and zinc chloride are produced quickly by the reaction of zinc with hydrochloric acid. In a single displacement reaction, zinc metal displaces hydrogen to produce zinc chloride and hydrogen gas. Because the reaction is exothermic, a significant amount of heat is produced.

The reaction goes in following order

[tex]Zn(s)+2HCl(aq)\rightarrow ZnCl_{2}(aq)+H_{2} (g)[/tex]

Percentage of Zn = (mass of Zn/mass of Ore) x 100

Mass of Zn = [tex]\frac{44 \times 8.05}{100}[/tex] = 3.54g

n Zn= [tex]\frac{3.54g}{65.38g}[/tex] per mole = 0.054144

n [tex]HCl[/tex] = 2 x 0.054144 = 0.10828

M= [tex]\frac{n}{V}\times1000[/tex]

V=[tex]\frac{n}{M}\times1000[/tex]

[tex]\frac{0.10828}{2.50}\times1000[/tex] = 43.312 mL

So 43.312 mL of 2.50M HCl is required to react with zinc.

The reaction goes in following order

[tex]Zn(s)+2HCl(aq)\rightarrow ZnCl_{2}(aq)+H_{2} (g)[/tex]

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the empirical composition of this substance Its molecular weight has also been calculated to be around 156.

the molecular equation Response: CGHG.

Calculate the grams of carbon and hydrogen in 4.40 g of CO2 and 2.70 g of H2O, respectively.

4.40 g x (12.011 g/44.0098 g) = 1.20083 g of carbon

2.70 g times (2.0158 g / 18.0152 g) Equals 0.3021482 g of hydrogen

2) Calculate the corresponding number of moles from the grams of C and H molecular weight..

20083 g / 12.011 g/mol = 0.09998 mol of carbon

In terms of hydrogen, 0.3021482 g / 1.0079 g/mol equals 0.2998 mol

3) To break up the molar amounts listed above into smaller, more manageable amounts, divide each one by its lowest value.

numbers.

0.09998 mol/0.09998 mol = 1 for carbon.

hydrogen: 0.298 mol/0.0998 mol = 2.9986 mol = 3

We have now discovered the solution: the substance's empirical formula is CGHG

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Ella is intrigued by the idea of fusing elements to create new materials. Before she mixes the ingredients to make a particular materials, she must understand the physical and chemical qualities of the constituent parts and how they interact.

Sanding just altered the surface's texture; the wood itself did not convert into a new substance. Even though a piece of metal may glow after being burnt in a fire, the metal remains the same substance both during and after cooling. The production, characterization, and use of materials with intriguing or potentially beneficial physical or chemical properties include the use of chemistry, according to the emerging and highly multidisciplinary field of study known as materials chemistry.Materials chemistry includes solid-state chemistry, nanoscience, and polymer chemistry since it encompasses inorganic, organic, polymeric, and hybrid materials. The creation of new technologies and the growth of the world economy both depend on materials chemistry. Looking back, we can see that synthetic materials have significantly raised global living standards and quality of life.

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a 150- mgmg sample of technetium-99 mm is used for a diagnostic test. if technetium-99 mm has a half-life of 6.0 hh , 19 milligrams of the technetium-99 mm sample remains active 18 hh after the test.

Decay of radioactive substances follows first-order kinetics. First order rate equation is A = Ao e-kt.  Ao = Intial active amount of substances .

A = Active amount of substance after certain time (t), K = Decay constant. k = ln2 / t½, k = 0.693 / 6.0 hr, k = 0.1155 / hr. A = Ao e-kt A = 150 mg x e-0.1155 hr?¹ x 18.0 hr. A = 18.758 mg.So Answer = 19 g of  remains active 18 h after the test.The half-life of a quantity is the time it requires to decrease to half of its original value. In nuclear physics, the term is usually used to describe how rapidly atoms undergo radioactivity or how long stable atoms live. The term is also used to describe any kind of exponentially decaying in general.

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Answer: I believe the answer is B

Among the elements in the periodic table, tungsten metal is expected to have the highest melting point.

Tungsten, having atomic number 74 belongs to the 6th group and 6th period of the periodic table.

It is the metal with the highest melting point i.e 3422°C . For this reason, tungsten is used as a metallic component in the filaments of electric bulbs and in cathode ray tubes.

Tungsten is considered a refractory metal due to its heat-hesistance nature. on the other hand, alkali metals such as Li,Na,K  have low melting points because of their large size of atoms and due to which the binding energies of the atoms in the crystal lattice is comparatively low, resulting in low melting point.

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Answer:

5

Explanation:

fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).

The amount of energy required to increase the temperature of one gram of water by one degree Celsius is known as a "calorie," which is a unit of energy.

For example, a 170 calorie can of beer actually contains 170,000 calories of digestible energy,

so if a student foolishly decides to binge drink 21 beers, the equivalent amount of digestible energy in the beer is 21x17000.

= 3570kcal

Nutrition labels on food products typically tell you how many calories of digestible energy are in one serving, where "digestible" means that the energy stored in the chemical bonds of the molecules comprising the food can be extracted by your body.

Another heat measurement unit used in the US is the British thermal unit, or Btu. The amount of heat needed to increase 1 lb of water's temperature by 1°F is equal to 1 Btu.

As a result, the energy in BTUs E(BTU) is equivalent to 0.00029307107017 times the energy in kilowatt-hours E(kWh):

E(kWh) = 0.00029307107017 × E(BTU)

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The final temperature of the oven after being preheated, y is 98 degrees Fahrenheit.

The relationship between the final temperature, y, and the time taken to preheat the oven, x is given by the equation below:

y = 20x + 78

where;

the final temperature is  y,

and the time taken to preheat the oven is  x

When x is equal to 1, the value of y can be determined as follows:

y = 20 (1) + 78

y = 98 degrees Fahrenheit.

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If 22 g acetaminophen (151.163 g/mol) was generated. The percent yield of the reaction is 72.78 %.

Calculation :

C₆H₇NO  +  C₄H₆O₃  --> C₃H₉NO₂ + C₂H₄O₂

0.20 moles   0.25 moles    22g

limiting reagrnt  --> C₆H₇NO

from reaction equation

.20 mol of acetaminophen = .20*151.163 = 30.23 g

% yield = (practical/ theoritical)yield* 100 = 72.78 %

reaction yield. The reaction yield (absolute yield) of a chemical reaction is the amount of pure, dry product recovered from the reaction. Relative yield or percent yield (%) is commonly calculated to measure the efficiency of chemical reactions in organic synthesis.

Yield, also called reaction yield, is a measure of the molar amount of product to reactant consumed in a chemical reaction, usually expressed as a percentage.  Yield is one of the main factors that scientists must consider in organic and inorganic chemical synthesis processes. [2] In chemical reaction engineering, “yield,” “conversion,” and “selectivity” relate to unwanted products, how much of the starting material is consumed (conversion), how much of the desired production A term used to describe the rate at which something is formed (yield). (selectivity) represented as X, Y, and S

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It is false that a helium atom fusing with a hydrogen atom is the initial stage in the hydrogen-burning process.

Four hydrogen protons and two electrons are used in the basic hydrogen fusion cycle, which results in the creation of a helium nucleus, two neutrinos, and six photons. The first stage in this three-phase process is the fusion of hydrogen into deuterium. In this collision of two protons, one proton decays into a neutron, which releases an antielectron and a neutrino.

The last proton joins the neutron to form a heavy hydrogen (deuterium) nucleus, and the newly created antielectron will annihilate with an electron to generate two very high-energy photons.

A proton is grabbed by a deuterium nucleus, which subsequently emits a photon and forms a 3He nucleus, in the second phase of the synthesis of helium-3.

The third phase involves recombining two helium-3 atoms into a single helium nucleus while emitting two protons.

Take note that for every time step 3 happens, steps 1 and 2 each occur twice. The total net energy released during this process is 26 MeV.

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The aluminum metal reacts with chlorine gas to form aluminum chloride the reaction starts with 3 g of chlorine gas , grams of aluminum chloride formed is 3.73.

The balanced reaction is given as :

2Al +  3Cl₂   ---->   2AlCl₃

mass of Cl = 3 g

molar mass of Cl₂  = 71 g/mol

moles of Cl₂  = mass / molar mass

                      = 3 / 71

                      = 0.0422 mol

3 mole of Cl₂  produces 2 moles of AlCl₃

0.0422 mol of  Cl₂   = (2/3) 0.0422

                                  = 0.028 mol of AlCl₃

mass of AlCl₃ = molar mass × moles

                      = 133.34 × 0.028

                      = 3.73 g

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Answer:

solubility

Explanation:

the solid substances will be added to water to see which one is soluble