A 28.0 g sample of nitrogen gas combines completely with 6.0 g of hydrogen gas to form ammonia. What is the mass of ammonia formed?​

108.81 grams of phosphorus are present in 3.51 moles of phosphorus trichloride, PCl₃.  

The molecular formula of Phosphorus trichloride is PCl₃.

One mole of phosphorus trichloride contains one mole of phosphorus element.

The molar mass of phosphorus = 31 g.

So,

1 mole of phosphorus trichloride contains 31 g of phosphorus

Since,

1 mole PCl₃ has 31 g Phosphorus

1 × 3.51 moles PCl₃ has 31×3.51 g Phosphorus

3.51 moles PCl₃ has 108.81 g of Phosphorus

Hence,

3.51 moles of phosphorus trichloride have 108.81 grams of phosphorus present in it.

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The osmium with a density of 22.6g/cm3 has a volume in cm3 of 0.965 cm3

The density formula and the procedure we will use is:

ρ = m/v

Where:

Information about the problem:

Applying the density formula and isolating the volume (v), we get:

ρ = m/v

v = m / ρ

v = 21.8 g / 22.6g/cm3

v = 0.965 cm3

It is a physical quantity that expresses the ratio of the body mass to the volume it occupies.

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The volume occupied by a  21.8 g sample of osmium having a density of 22.6 g/cm3 is  0.965cm3.

The density formula is:

                           Density = mass/volume

To find volume:

                           Volume = mass/density

Now

mass = 21.8 g

density= 22.6 g/cm3

Putting the values

                        Volume = 21.8/22.6

                        volume = 0.965cm3

Thus the volume is 0.965cm3.

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The volume occupied of the sample of osmium  with a density of 22.6 g/cm³  and a mass of 21.8 g is: 0.9646 cm³

The density formula and the procedure we will use is:

d = m/v

Where:

Information about the problem:

Applying the density formula and clearing the volume we get:

d = m/v

v = m/ d

v = 21.8 g / 22.6 g/cm³

v = 0.9646 cm³

It is a physical quantity that expresses the ratio of the body mass to the volume it occupies.

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Rubidium's valence shell electron, "(ns(1))," is more loosely bound than in potassium due to the larger atomic size of rubidium. As a result, Rubidium is found in Group 1 below potassium.

When an atom's outer shell is open, a valence electron, which is an electron attached to it, can take part in the creation of a chemical bond.

To form a shared pair in a single covalent bond, each atom in the bond contributes one valence electron.

an atom's valence shell electron, which is its outermost shell and which can be shared or transferred to another atom.

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Before to exposed to heat stearic acid is a colorless solid, which gets converted to a clear liquid under the influence of heat.

Stearic acid is a colorless or white, waxy solid, which slightly dissolves in water but is soluble in oil, Stearic Acid is a fatty acid due to the presence of an 18-carbon chain, it also knows as Octadecanoic Acid. When the stearic acid is exposed to heat it gets converted to a clear liquid which was supposed to be a white solid in nature.As we know that the law of conservation of matter defines that matter is conserved,  the matter can change form through chemical and physical changes, but the amount of matter before the changes remains the same, which means it can't be destroyed or created.

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When substance a reacts with substance b, a new substance c is formed. based on this information, we can say that the given chemical reaction is spontaneous.

When two or more reactants combine together to form a final product without the loss of any atoms present in the reactants the reaction is known as addition reaction.

If a and b are elements, then they react with each other and form the compound c. Thus this will be the example of combination reaction in which one or more elements combine to form a compound. As no external energy is provided i.e., heat energy or catalyst , so we can also say that the given reaction is spontaneous.

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Molarity of a solution prepared by dissolving 3.50 mol nacl in enough water to make 1.50 l of solution is 2.33 mol /L

Molarity is a physical quantity that describes the substance's number of moles available in the unit liter volume of the solution. A mole per liter is a measurable unit to explain molarity.

Number of moles of the NaCl is

np = 3.50 mol

The volume of the solution is np = 1.50 L

The expression for the molarity solution is cm = np/vp

At the value and get the above expression

Cm = 3.50/ 1.50

      = 2.33 mol /L

Thus the molarity of the solution is 2.33 mol /L

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The pressure reading increases.

Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit vicinity over which that pressure is distributed. Gauge stress (also spelled gage pressure)[a] is the stress relative to the ambient pressure.

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The hydrogens and oxygen of a water molecule are held together by covalent bonds.

A covalent bond is an electron exchange that causes the production of electron pairs between atoms. Covalent bonding is a stable equilibrium of the attractive and repulsive forces between two atoms that occurs when they share electrons.

Bonding pairs or sharing pairs are other names for these electron pairs. Because electrons are shared among several molecules, each atom can reach the equivalent of a full valence shell, resulting in a stable electronic state.

In organic chemistry, covalent bonds are much more common than ionic bonds. Covalent bonds unite the atoms in a single water molecule, whereas hydrogen bonds join two water molecules. Water develops a covalent bond when oxygen shares an electron with each hydrogen atom.

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Suppose we heat a 4. 31 g sample of a Na2Co3 hydrate. after thorough heating, the mass of the compound is 3. 22 g based on the data, Na₂CO₃ • 2H₂O for the hydrate we start with this formula.

Here compound are Na₂Co₃ then mass of compound is 3.22g and molar mass is 105.98g/mol

Moles of compound (anhydrate Na₂CO₃) = mass / molar mass = 3.22 g / 105.98 g mol = 0.0304 mol mass

So here compound Na₂Co₃ are given and we start with formula Na₂CO₃ • 2H₂O  for the hydrate.

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Answer:

B

Explanation:

seriously (MÀJÌKÁÎ DÊẞÜ)

The pH of buffer solution is 2.1225

We know that

pH = [tex]pK_a[/tex]   + [tex]log_1_0 \frac{[A]^{-} }{[HA]}[/tex]

In this question

[tex]pK_a[/tex] = 2.40

[tex][A]^{-}[/tex] = 4.75 mol

[HA] = 9 mol

Therefore putting values in formula

pH = 2.40 + [tex]log_1_0\frac{4.75}{9}[/tex]

pH = 2.40  + [tex]log_1_0[/tex] 0.52

pH = 2.40 - 0.283

pH = 2.1225

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Correct metal is aluminum

Martina has a sample of an unknown substance she measures the substance. its mass is 13.5 grams, and its volume is 5 cm³ so here density concept is seen.

Density = mass/volume

So 13.5/5 = 2.7

This density is same as aluminum that's why this metal is aluminum.

Aluminum is a chemical element with the symbol Al and atomic number 13  aluminum is a silvery-white, lightweight metal. It is soft and malleable. aluminum is used in a huge variety of products including cans, foils, kitchen utensils.

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Answer:Aluminum

Explanation:

The multiplicities that are observed for the signals in the off-resonance decoupled 13c nmr spectrum of (2e)-3-chloro acrylaldehyde is a singlet, a triplet, and a quartet. The correct option is E.

Off-resonance decoupling is a process of removing all hydrogen and carbon coupling from a signal except for the place which is near the nucleus or joined with the nucleus.

In NMR also, the coupling of hydrogen and carbon is removed except for the place near the nucleus.

Thus, the correct option is E) a singlet, a triplet, and a quartet.

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The question is incomplete. Your most probably complete question is given below:

A) 2 singlets and a doublet

B) a singlet and 2 doublets

C) 3 singlets

D) a singlet, a doublet, and a triplet

E) a singlet, a triplet, and a quartet

A compound that occupies a receptor, but does not activate the neuron is known as an antagonist.

A neurotransmitter receptor (also known as a neuroreceptor) is a protein on the membrane that is activated by a neurotransmitter. Chemicals on the cell's surface, such as a neurotransmitter, can bind to the membrane, and receptors can be found along the membrane.

G-protein coupled receptors are found on the majority of neurotransmitter receptors. Neurotransmitter (NT) receptors can be found on the surface of neurons and glia. One neuron sends messages to the other neuron via neurotransmitters at a synapse.

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The Ag[tex]_{2}[/tex]CO[tex]_{3}[/tex]   is formed when 25.0 ml of 0.200M AgNO[tex]_{3}[/tex] is mixed with 50.0 ml of 0.800 M Na[tex]_{2}[/tex]CO[tex]_{3}[/tex] is 0.68 g.

According the question , the chemical equation is give by :

2AgNO[tex]_{3}[/tex]   +   Na[tex]_{2}[/tex]CO[tex]_{3}[/tex]  ------->   Ag[tex]_{2}[/tex]CO[tex]_{3}[/tex]     +      2NaNO[tex]_{3}[/tex]

Given that :

volume of silver nitrate = 25.0 ml or 0.025 L

molarity M =  0.200 M

volume of sodium carbonate = 50.0 ml or 0.050 L

molarity = 0.800 M

now, no. of moles of silver nitrate  =  0.025 × 0.200 = 0.005 moles

no. of mole of sodium carbonate = 0.050 × 0.800 =  0.04 moles

the no. of moles of silver carbonate ,  =  0.5 × 0.005

                                                                =  0.0025 moles

molar mass  of Ag[tex]_{2}[/tex]CO[tex]_{3}[/tex] = 275.7 g/mol

therefor, the mass of Ag[tex]_{2}[/tex]CO[tex]_{3}[/tex] =   0.0025 moles × 275.7 g/mol

                                                 =0.68 g

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Answer:

When a liquid is remained a liquid the the particles are loose but as the liquid turns into solid the particle get more compact and closer together. So in that case the liquid will have lower density.

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The reduction of a molecule can sometimes result in the acquisition of a proton, a reaction referred to as hydrogenation.

What is hydrogenation?

Molecular hydrogen (H2) and another substance or element undergo a chemical reaction known as hydrogenation, typically in the presence of a catalyst such as nickel, palladium, or platinum. The method is frequently used to saturate or decrease organic molecules.

To turn an oil that is liquid into a solid fat. Hydrogenation, sometimes in conjunction with other procedures like interesterification or fractionation, may offer a technique to manufacture the needed fat when solid fats of the proper consistency are expensive or unavailable.

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While burning iron shavings results in a chemical change, the formation of little particles of iron shavings is a physical change.

Small bits of iron shavings being formed are an example of a physical change because they can be transformed back into nails, whereas small pieces of iron shavings being burned on a flame are an example of a chemical change since they cannot be transformed back into their original shape. Chemical change is a change in matter that modifies the chemical properties of the substance as opposed to physical change, which modifies the matter's physical characteristics.

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The atomic number of an isotope of tellurium that has 71 neutrons is 52.

The atomic number of an element is the number of protons in an atom of that element.

The number of protons in an atom can be got by subtracting the mass number of an element from the number of neutrons.

According to this question, one isotope of tellurium, tellurium-123, has 71 neutrons. The atomic number or proton number can be calculated thus;

atomic number = 123 - 71

atomic number = 52

Therefore, the atomic number of an isotope of tellurium that has 71 neutrons is 52.

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Answer:

Explanation:l do not no the answer

The organic compounds that are divided into two types, simple and complex, are called carbohydrates.

Carbohydrates are diveded into twy types: simple and complex (starches, fiber, glycogen).

Simple carbohydrates are made of one (monosaccaharides) or two sugar units.

Complex carbohydrates are made up of many sugar units.

For example, glucose (C₆H₁₂O₆) is a simple carbohydrate.

Glucose is chemical compound composed of six carbon atoms, twelve hydrogen atoms and six oxygen atoms.

Starch is a polymeric carbohydrate consisting of a large number of glucose units bonded by glycosidic bond. Starch is a white, tasteless and odorless powder that is insoluble in cold water or alcohol.

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Atomic # / Symbol / Name / Melting Point (ºC) / Boiling Point (ºC)

1        /         H    /    Hydrogen   /   -259.14   /   -252.87

2      /        N      /   Nitrogen      /   -209.86    /   -195.8.

3     /       NH3   /  Compound Ammonia  /  -77.7  /  -33.3

For Hydrogen, the Melting point is -259.14, while for the Nitrogen it's -209.86. And the boiling point for Hydrogen is -252.87, while for the Nitrogen it's -195.8. The difference is that Hydrogen has less temperature in melting and boiling points, while Nitrogen has more. And for the Ammonia, this one has the most temperature, being at -77.7 degrees celsius for melting point, which is -107.9°F, and being at -33.3 degrees celsius, which is -28.01°F

Use integrated first order rate law, which give you the concentration of reactant sulfuryl chloride as function of time t:  

ln[SO₂Cl₂] = ln[SO₂Cl₂]₀ - k∙t  

([SO₂Cl₂]₀ i the initial concentration and k is the rate constant)  

=>  [SO₂Cl₂] = e^(ln[SO₂Cl₂]₀ - k∙t) = e^(ln[SO₂Cl₂]₀) ∙ e^( - k∙t)  

= [SO₂Cl₂]₀ ∙e^( - k∙t)  

The decomposition of SO₂Cl₂ follows the reaction equation  

SO₂Cl₂ → SO₂ + Cl₂  

So per mole of sulfuryl chloride disappeared one mole of sulfur dioxide is formed. Hence the changes in concentrations of these compounds are related as:  

-∆[SO₂Cl₂] = ∆{SO₂]  <=>  [SO₂Cl₂]₀ - [SO₂Cl₂] = [SO₂] - [SO₂]₀  

Assuming there was initially no sulfur dioxide you get for its concentration:  

[SO₂] = [SO₂Cl₂]₀ - [SO₂Cl₂]  

= [SO₂Cl₂]₀ - [SO₂Cl₂]₀ ∙e^( - k∙t)  

= [SO₂Cl₂]₀ ∙(1 - e^( - k∙t))  

after 210s starting with 0.150M of [SO₂Cl₂]  

[SO₂]= 0.150M ∙(1 - e^( - 1.48×10⁻⁴s⁻¹k ∙ 240s) =

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Answer:

Iron ore

Explanation:

Iron ore is the raw material used to make pig iron, which is one of the main raw materials to make steel

HTQ would be the most likely daughter cell genotype if independent assortment does not occur.

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Answer:

Explanation:

The option that would be true about the shape of the truck is that the truck keeps its shape. Thus, the correct option is D.

What is the volume of solid?

The volume of a solid may be defined as the process of measuring the overall space that an object takes up in its physical structure.

The volume of any solid alters with respect to its shape. If its shape increases, the volume definitely increases, while if its shape decreases, the volume ultimately reduces.

Therefore, the option that would be true about the shape of the truck is that the truck keeps its shape. Thus, the correct option is D.

Multiple factors can affect the accuracy of a pulse oximeter reading, such as

Observe the manufacturer's recommended usage procedures. When you put the oximeter on your finger, make sure your hand is cosy, relaxed, and positioned below the level of your heart.

Remove any nail paint you might have had on that finger. While you are still seated, do not move the location of the pulse oximeter on your body. Wait for the reading to stabilize and display a single number after a brief interval.

If you note your oxygen levels along with the date and time of the reading, you can easily track changes in them and inform your healthcare physician about them. Follow your doctor's recommendations for how often and when to check your oxygen levels.

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Answer:

22.68

Explanation:

Since about 2.2 lbs = 1kg, 50 pounds is about 22.68.