What is the molar mass of a gas if a flask with a volume of 3. 16 l contains 9. 33 grams of the gas at 32. 0°c and 1. 00 atm?

10.55 grams of nitrogen gas are formed when 18. 1 g of ammonia is reacted with 90. 4 g of copper(ii) oxide.

The laws which deals with the composition of substance by mass or his volume are called the laws of stoichiometry.

The laws of stoichiometry are:

Reaction:

3CuO + 2NH₃ → N₂ + 3 Cu + 3 H₂O

n(CuO) = m(CuO) / 64 + 16 = 90.4 / 80 = 1.13 mol   (molar mass of CuO = 90.4)

n(NH₃) = m(NH₃) / 14+3 = 18.1 / 17= 1.065mol   (molar mass of NH₃ = 18)

For 1.065 mol of NH3 undergoing the reaction, 3/2  times larger amount of CuO is needed.

CuO is 1.6 mol but it's only 1.13 of it so CuO is a limiting reactant, we must count stoichiometry by amount of this reactant.

n(CuO) = 1.13 mol,

n(N₂) = n(CuO) / 3 = 1.13 / 3 = 0.376 mol

m(N₂) = 0.376 x 28 = 10.55 grams

10.55 grams of nitrogen gas are formed when 18. 1 g of ammonia is reacted with 90. 4 g of copper(ii) oxide.

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Answer:

000

Explanation:

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The molar concentration of potassium ions in a  0. 250 m K₂SO₄(aq) solution is 2.

The molar concentration of a solution is the presence of solute in one unit of a solution.

Molar concentration = number of moles / volume

The volume is given 0.250 m

To calculate the number of moles:

There will be 2 moles of potassium and  1 mole of sulfate in one L of the solution.

So in 0.250 L

0.250 x 2 x 1 = 0.500

The total number of moles of potassium and sulfate ion are 0.500

Now, putting the value:

Molar concentration = number of moles / volume

0.500 / 0.250 = 2

Thus, the molar concentration is 2.

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N3H is the correct answer.

N3H is the molecular formula of the smallest neutral compound of nitrogen and hydrogen.

an expression that lists the quantity and kind of atoms that make up a substance's molecules.

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During the day, due to the existence of sunlight, the procedure of photosynthesis elevations over that of respiration. Photosynthesis uses carbon dioxide to produce carbohydrates removing oxygen as a byproduct. During the night, because there is no sunlight, the rate of photosynthesis decreases. This, therefore, drives the rate of respiration to surpass the speed of photosynthesis. In respiration, oxygen is consumed and carbon dioxide is dismissed.

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X(N03)2

Given: Consider a hypothetical atom x

molecular formula of calcium nitrate = Ca(NO3)2

formula of x chloride is xcl2

molecular formula for x nitrate = ?

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A piston-cylinder device contains helium gas, during a reversible, isothermal process the entropy of the helium will sometimes increase.

As entropy of an ideal gas depends on pressure and temperature . Hence , entropy change during isothermal process if pressure changes . Enropy changes whenever there is a transfer of heat . The change in entropy is the heat added divided by the temperature at which the transfer took place .

A piston-cylinder is a moving device that is made tight by the piston rings. It moves inside in a cylinder in the form of liquid and later expands and then contracts.

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3.6 moles [tex]NH_{3}[/tex] required when each quantity of reactant completely reacts.

The ratio of the mole quantities of any two compounds present in a balanced chemical reaction is known as the mole ratio. A reaction's product yield can be predicted using mole ratios, as can the amount of reactant required to produce a specific amount of result.

The balanced chemical equation is :

[tex]3N_{2} H_{4}[/tex](l) → [tex]4NH_{3}[/tex](g) + [tex]N_{2}[/tex](g)

Given is = 2.6 mol [tex]N_{2} H_{4}[/tex]

As we see, 3 moles of [tex]N_{2} H_{4}[/tex] reacts with  4 moles of [tex]NH_{3}[/tex].

Therefore,

n( [tex]NH_{3}[/tex]) = n(  [tex]N_{2} H_{4}[/tex] ) × [tex]\frac{4}{3}[/tex]

n( [tex]NH_{3}[/tex]) = [tex]2.6mol^{*} \frac{4mol}{3mol}[/tex]

n( [tex]NH_{3}[/tex]) = 3.6 moles.

Therefores, 3.6 moles [tex]NH_{3}[/tex] required when each quantity of reactant completely reacts.

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The coefficient 2 should appear in front of [tex]LiNO_{3}[/tex] in the balanced equation

The chemical equation in which number of atoms in reactant side is equal to the number of atom in product side is called balanced chemical equation. The example of balanced equation is given as,

[tex]Pb(NO_{3} )_{2} (aq) + Li_{2} SO_{4} (aq)[/tex] →  [tex]2Li(NO_{3} ) (aq) + Pb SO_{4} (aq)[/tex]

In the above equation, 2 is appear in front of [tex]LiNO_{3}[/tex] in the balanced equation which is known as the coefficient.

The symbolic representation of the chemical reaction is called chemical equation.

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Answer: 2

Explanation:

There exist ways in separating mixtures of chloride salts such as that sodium chloride and ammonium chloride. It can be accomplished by crystallization, filtration, or sublimation.

An antacid exists as a substance that neutralizes stomach acidity and stands habituated to relieve heartburn, indigestion, or an upset stomach.

Antacids increase the pH of the stomach contents toward neutrality. An antacid that increases the pH from 1.5 to 3.5 produces a 100-fold decrease in the concentration of gastric acid. Furthermore, the reduction of acidity exists escorted by inhibition of pepsin activity, another essential component of the digestive juice.

There exist ways in separating mixtures of chloride salts such as that sodium chloride and ammonium chloride. It can be accomplished by crystallization, filtration, or sublimation. The easiest approach among the three exists separation by sublimation.

Ammonium chloride sublimes upon heating. The sublimation exists as a decomposition of ammonium chloride forming ammonia and hydrogen chloride.

Sodium chloride on the other hand doesn't sublime and includes a more increased melting point than ammonium chloride. If we want to divide the mixture, we have to heat it to 330-350 degrees Celsius and manage the gas that will be produced.

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The concentration of the bromine solution, given the data is 0.04 M

Molarity is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:

Molarity = mole / Volume

Mole = mass / molar mass

Mole of bromine molecule (B₂) = 1.6 / 160

Mole of bromine molecule (B₂) = 0.01 mole

Molarity = mole / Volume

Molarity bromine solution = 0.01 / 0.25

Molarity bromine solution = 0.04 M

Thus, molarity of the bromine solution is 0.04 M

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The reagents which are used to carry out the chlorination of benzene are   cl2/fecl3 and cl2/nacl

Chlorination is the process of disinfecting drinking water by introducing chlorine to eradicate viruses, germs, and parasites. To get drinking water with safe levels of chlorine, various techniques can be utilized. Chlorination is the technique of disinfecting and eradicating bacteria from drinking water by adding chlorine to it.

To get drinking water with safe levels of chlorine, various techniques can be utilized. Chlorine can be found as solid calcium hypochlorite (Ca(OCl)2), sodium hypochlorite solution (NaOCl), or compressed elemental gas. Chlorine is added to water as part of the chlorination process, however the chlorinating substance need not be pure chlorine.

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The correct answer is  C8H8O2.

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Yes, the objects made of the same metal.

The volume of the first object, which is a cube, is equal to the edge length cubed.

This volume is converted to mL as follows:

V1 = [tex](3 cm)^{3}[/tex] = 27 [tex]cm^{3}[/tex] = 27 mL

Based on its given mass, the density will be:

d1 = m1/V1

   = 140.4g/ 27.0 mL

   = 5.20g/mL

The following thing is a sphere. We calculate the volume of a sphere using the following formula, with the result expressed in  mL:

V1 = 4/3 *[tex]\pi[/tex]* [tex](1.42)^{2}[/tex]

= 12 [tex]cm^{3}[/tex]

= 12 mL

The density based on the following mass will be 

d2= m2/V2

= 61.6 g/12.0 mL

= 5.14 g/mL

These two computed densities are separated by about 1%. We can determine that these objects are made of the same metal based on the precision of +/- 1% provided.

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Molecules of KCl and C6 H12 O6 molecules of KCl and C6, H 12, O6, will be present on dissolving equal amount of potassium chloride (KCl) and table sugar (C12H22O11) in the same container of water.

Dissolving the sugar within the water makes a homogenous aggregate and once dissolved an answer is made by the combination of a solute (sugar) and solvent. If a solute is a strong or liquid, growing the temperature will increase its solubility. as an example, greater sugar can dissolve in warm water than in cold water. If a solute is a gasoline, increasing the temperature decreases its solubility.

The solvent is the substance which commonly determines the physical state of the solution (stable, liquid or gas). The solute is the substance which is dissolved by means of the solvent. as an example, in an answer of salt and water, water is the solvent and salt is the solute.A supersaturated solution is an answer that contains greater than the maximum quantity of dissolved solute than a saturated solution below the identical conditions.

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Answer:

1.7x10g per 100cc

Explanation:

The solubility product of Caf, at 25 °C is about X x 10-11 mol/L.

The pH of the solution is determined by the hydrogen ion concentration. The pH of the solution with 1.5 M NH4Cl and 0.50 M NaOH is 8.77.

The potential of the hydrogen ion in the given solution is called pH which determines the acidity and basicity of the solution.

Given

The molar concentration of 500 mL NH4Cl = 1.5 M

The molar concentration of 500 mL NaOH= 0.50 M

Kb (NH3) = 1.8 × 10 -5

First pOH is calculated as,

pOH = pKB + log [NH4Cl][NaOH]

= - log 1.8 × 10-5 + log [1.5][0.50]

= - log 1.8 × 10-5 + log [3]

= 4.744 + 0.477

= 5.221

Now, pH is calculated from pOH as,

pH + pOH = 14

pH = 14 – pOH

= 14 – 5.221

= 8.77

Thus we found that, 8.77 is the pH of the solution with 1.5 M NH4Cl and 0.50 M NaOH.

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Answer:

2.5 moles ZnO

Explanation:

To find the amount of moles, you need to use a mole-to-mole ratio between ZnS and ZnO. The mole-to-mole is made up of the coefficients in the balanced equation.

4 ZnS + 6 O₂ -----> 4 ZnO + 4 SO₂

2.5 moles ZnS         4 moles ZnO
-----------------------  x  -----------------------  = 2.5 moles ZnO
                                  4 moles ZnS

**While the chemical equation is technically balanced, it does not exist in the smallest mole ratio as possible. Each coefficient can be divided by 2.**

2 ZnS + 3 O₂ -----> 2 ZnO + 2 SO₂

The salt gives the most basic 0. 1 m solution in water is  NaNo₂.

Basic solutions are those solutions in which the concentration of OH- ion will always be greater as compared to the concentration of H+ ion in the solution.

If the solution is basic so after the dissociation, the formation of a strong base and a weak acid is a must in the solution.

NaNo₂ gets dissociated in water in the form of NaOH and HNO₂ and  NaOH is a strong base whereas HNO₂ is a weak acid due to which the solution becomes acidic.

Therefore, salt gives the most basic 0. 1 m solution in water NaNo₂.

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Which method is used for synthesis of ammonia?

The Haber-Bosch process

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Answer:

Au2O3

Explanation:

See attachment.

Frameshift mutation refers to the addition (insertion) or removal (deletion) of one or more coding sequence letters (nucleic acids).

The insertion or deletion of nucleotide bases in amounts that are not multiples of three is referred to as a frameshift mutation in a gene. This is significant because a cell reads the genetic code for proteins in groups of three nucleotides. These so-called "triplet codons" each stand for one of the 20 different amino acids that go into making a protein.

The entire gene sequence after the mutation will be misread if a mutation alters this regular reading frame. This may lead to the incorrect amino acids being added to the protein or the development of a codon that prevents the protein from getting longer.

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Answer:

25 gm would be left

Explanation:

45 hours is 3 half lives

200 gm  * 1/2 * 1/2 * 1/2 = 25 gm

According to the concept of half life , as 45 hours are equal to three half- lives after 3 half-lives 25 g of sodium-24 remains.

Half -life of a substance is defined as the time which is required for half of the quantity of a radioactive substance to get decayed.It is a term which is used in nuclear chemistry for describing how quickly unstable atoms undergo radioactive decay into other nuclear species by emitting particles or the time which is required for number of disintegrations per second of radioactive material to decrease by one half of its initial value.

In the given problem time is=45 hours and as 1 half  life=15 hours , for 45 hours=45/15=3 half lives .

Amount of sodium-24 after 3 half lives= 200×1/2×1/2×1/2=25 grams.

Therefore, after 45 hours 25 g of sodium-24 remains.

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The molar concentration of the acid, HCl required for the reaction is 0.614 M

We'll begin by writing the balanced equation for the reaction. This is given below:

2HCl + Ca(OH)₂ —> CaCl₂ + 2H₂O

The mole ratio of the acid, HCl (nA) = 2

The mole ratio of the base, Ca(OH)₂ (nB) = 1

From the question given above, the following data were obtained:

Volume of acid, HCl (Va) = 50.6 mL

Volume of base, Ca(OH)₂ (Vb) = 45 mL

Molarity of base, Ca(OH)₂ (Mb) = 0.345 M

Molarity of acid, HCl (Ma) =?

MaVa / MbVb = nA/nB

(Ma × 50.6) / (0.345 × 45) = 2

(Ma × 50.6) / 15.525 = 2

Cross multiply

Ma × 50.6 = 15.525 × 2

Ma × 50.6 = 31.05

Divide both side by 50.6

Ma = 31.05 / 50.6

Ma = 0.614 M

Therefore, the molar concentration of the acid, HCl is 0.614 M

Molar concentration, also known as molarity, is most commonly expressed in moles of solute per litre of solution. It is defined in broader applications as the amount of solute substance per unit volume of solution or per unit volume available to the species, represented by lowercase letters.

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Electron configuration is the electron distribution in the molecular and atomic orbital. An element with configuration ns²np¹ will be in the 3A group. Thus, option B is correct.

The electronic configuration has been the arrangement and distribution of the sub-atomic particle, an electron in the atomic shells.

The electronic configuration given is, ns²np¹. Here, there are three valence electrons in the outermost orbit. As it has been known that the number of the valence electron gives the number of the group.

Therefore, option B. 3A group or 13 group is the correct option.

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Your question is incomplete, but most probably your full question was, An element with the general electron configuration for its outermost electrons of ns2np1 would be in which group?

a. 2a

b. 3a

c. 4a

d. 5a

e. 8a

The products being more stable than the reactants is the factor which would reduce the yield of a reaction and is denoted as option B under standard conditions.

This is the process in which one or more substances which are referred to as reactants are converted into new substances which we call the products.

A chemical reaction involves atoms exhibiting different bond formation so as to ensure they acquire an octet configuration and promotes proper stability of the products.

When the products are more stable than the reactants it means it is unable to form other products thereby decreasing the yield which is why it was chosen as the most appropriate choice.

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In a solution, when the concentrations of a weak acid and its conjugate base are equal: 1. the -log of the concentration of H+ and the -log of the Ka are equal.

Any acid that entirely ionises in solutions is considered a strong acid. When positioned, it emits the most hydrogen ions or protons.

Acids that don't entirely dissociate in solution are referred to as weak acids. In other words, any acid that is not a strong acid qualifies as a weak acid. The amount of dissociation determines how strong an acid is; the more dissociation, the stronger the acid.

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log1.429V=3.20  volume (to the nearest 0. 1 ml) of 4. 70-m NaOH must be added to 0. 700 l of 0. 250-m HNO2 to prepare a ph = 3. 20 buffer

pH= pKa +log {[ NaOH ] / [ HNO2 ]​}

3.20=3.80+log{(V×4.70)/ ( 0.700×0.250)}

3.20=log1.429V

Volume will be 3.20=log1.429V

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