how many moles of Hcl can be produced from 1.21 moles of zn?

Given :

A sample of gas occupies 200 L at 780 mm Hg and 280 K.

To Find :

The new volume, in liters, of the gas at 810 mm Hg and 300 K.

Solution :

We know, by ideal gas equation :

[tex]PV = nRT[/tex]

Since, every thing is constant except [tex]nR[/tex] .

So,

[tex]\dfrac{P_1V_1}{T_1} = \dfrac{P_2V_2}{T_2}[/tex]

Putting all given values we get :

[tex]V_2 = \dfrac{T_2}{T_1}\times \dfrac{P_1}{P_2}\times V_1\\\\V_2 = \dfrac{300}{280}\times \dfrac{780}{810}\times 200\ L\\\\V_2 = 206.35 \ L[/tex]

Therefore, the new volume is 206.35 L.

Whenever any substance goes under chemical change so any of the reaction will happen either both or multiple compounds will combine to produce combination reaction either one compound will decompose itself into 2 or more compounds or elements and last one is replacement reaction the either reaction is not even going to combination nor decomposition, So when a reaction like that happens it must replacement reaction.

Now the question is what's the condition required for it, so basically a chemical reaction when takes place it depends upon several factor on the basis of which we conclude products. The factors are Temperature,catalyst,reagents, either what is the mechanism of reaction, stability of reactants and stability of products and alot more.

During reaction sometimes gas forms and sometimes not yea and well that also depends on the chemical reactivity and stability of product sometimes product found itself most stable releasing the gas evolving so it's been done itself and sometimes we add catalyst and adjust the reaction to extract that gas and get desirable product manually.

I wrote all i know if sorry if this is not what you're looking for :(

Answer:

4. All correct

Mark me brainliest and thenks :)))

Answer:

b

Explanation:

mark me brainliest pls

Answer:

b

Explanation:

bc

The value of enthalpy(ΔHº) for the final reaction (2C(s) + H₂(g) → C₂H₂(g) ) is  -1932.8KJ.

A system's enthalpy is its heat capacity. A reaction's enthalpy change is roughly equivalent to how much energy is lost or gained throughout the reaction. If the enthalpy of the system decreases over the reaction, the reaction is preferred.

C(s) + O₂(g) → CO₂(g) ΔHº = -94.6 kJ --- (1)

H₂(g) + O₂(g) → H₂O(l) ΔHº = -286.0 kJ ---(2)

2C₂H₂(g) + 5O₂(g) → 4CO₂(g) + 2H₂O (l)  ΔHº = -2598.8 kJ ---(3)

The value of ΔHº for the final reaction,

2C(s) + H₂(g) → C₂H₂(g)

ΔH₄° = 2× ΔH₂º +  ΔH₃º - ΔH₁º
ΔH₄° = 2× -286.0 + ( -2598.8) - (- 94.6)

ΔH₄° = 2× -286.0 -2598.8 + 94.6

ΔH₄° = 666 - 2598.8

ΔH₄° = -1932.8KJ.

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(4) 3- ethyl -2,5 dimethyl -1,4 -hexadiene

Answer:

Not sure were to start....

Explanation:

Answer: motion

Explanation: hope this helps you

Answer:

Autotrophs are organisms that prepare their own food through the process of photosynthesis, whereas heterotrophs are organisms that cannot prepare their own food and depend upon autotrophs for nutrition.

Explanation:

Btw I searched this up found it on a website called byjus.com. Hope this helps!

Answer:

1 = rusting of ice

2 = will change the properties of substance

3= gas to liquid

4= melting point

5= it moves from a warmer region to colder region

6) When 10.000 g of a hydrated compound are analyzed in the laboratory, the following analysis is obtained: 1.425 g of water, 5.462 g of lead, 1.266 g of carbon, 1.687 g of oxygen, and 0.160 of hydrogen. What are the name and formula of the compound?

The name and formula of the compound can be determined by analyzing the data given in the question. Based on the information provided, the compound contains lead, carbon, oxygen, and hydrogen. The molecular formula for the compound can be determined by adding up the number of atoms of each element present.

From the data given, the compound contains 1.266 g of carbon, which is equivalent to 1.266/12.01 = 0.105 mol of carbon atoms. It also contains 5.462 g of lead, which is equivalent to 5.462/207.2 = 0.026 mol of lead atoms. The compound also contains 1.687 g of oxygen, which is equivalent to 1.687/16.00 = 0.105 mol of oxygen atoms, and 0.160 g of hydrogen, which is equivalent to 0.160/1.01 = 0.158 mol of hydrogen atoms.

The molecular formula for the compound is therefore Pb(C2H2O2). However, it is also mentioned that the compound is hydrated, which means that it contains water. The 1.425 g of water present in the compound is equivalent to 1.425/18.02 = 0.079 mol of water molecules. The compound 1 likely Pb(C2H2O2)·xH2O, where x represents the number of water molecules present in the compound.

Answer:

Value of expressions in scientific notation = 15.86 x 10⁻¹⁰

Explanation:

Given expressions:

2.600 x 10⁻⁵ x 6.100 x 10⁻⁵

Find:

Value of expressions in scientific notation

Computation:

2.600 x 10⁻⁵ x 6.100 x 10⁻⁵

2.600 x 6.100 x 10⁻⁵x 10⁻⁵

15.86 x 10⁻⁵ x 10⁻⁵

We know that;

qᵃ x qᵇ = q⁽ᵃ⁺ᵇ⁾

So,

15.86 x 10⁽⁻⁵⁻⁵⁾

15.86 x 10⁽⁻¹⁰⁾

Value of expressions in scientific notation = 15.86 x 10⁻¹⁰

Answer: on

Explanation:5

The price of sodium chloride per 5 kg is 179 dollars. The experiment requires 65 g of NaCl. The price of65 g or 0.065 kg is 2.3 dollars.

Sodium chloride is an ionic compound formed by the combination of sodium metal and chlorine atom. Sodium metal has extra one electron in its valance shell and chlorine needs one more electron into its valence shell. Hence sodium donates its valence electron to chlorine forming NaCl.

NaCl is used as the table salt in food. It is a very important compound in our daily diet. Similarly NaCl is industrially important for many reaction especially in electrochemical processes.

It is given that, the price of 5 kg of NaCl = $179

required mass of NaCl = 65 g = 0.065 Kg

then , price of 0.065 kg = (0.065 × 179 /5) =  $2.31

Therefore, the cost of NaCl in the experiment is 2.31 dollars.

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Answer:

157.8 g

Explanation:

Step 1: Write the balanced equation

Fe₂O₃ + 3 CO ⟶ 3 CO₂ + 2 Fe

Step 2: Calculate the moles corresponding to 209.7 g of Fe

The molar mass of Fe is 55.85 g/mol

209.7 g × 1 mol/55.85 g = 3.755 mol

Step 3: Calculate the moles of CO needed to produce 3.755 moles of Fe

The molar ratio of CO to Fe is 3:2. The moles of CO needed are 3/2 × 3.755 = 5.633 mol

Step 4: Calculate the mass corresponding to 5.633 moles of CO

The molar mass of CO is 28.01 g/mol.

5.633 mol × 28.01 g/mol = 157.8 g

Answer: A balanced chemical reaction is A balanced chemical equation where the number of atoms of each type in the response is the same on both reactants and product sides.

Explanation: Burning, and cooking are 2 examples.

Answer:

B. Ca(NO3)2

Explanation:

edg 2022

Answer:

b

Explanation:

Answer:

Theoretical yield: 16.68g Limiting reactant: Ti  %yield=97.12%

Explanation:

Balanced reaction : Ti(s) +2 Cl2 (g) -> TiCl4(s)

g of substance = # of mole x molar mass

# of mole= g of substance/molar mass

%yield= actual yield x100/ theoretical yield

Ti is limiting reactant since it has the smallest amount of moles- 0.08795 causing it to run out first

Answer:

You didn't show which element it is. The proton is the atomic number, the electron is the same number of protons, and the neutron is the atomic mass rounded to the nearest whole number minus the proton.

Explanation:

Answer:

Chemical symbols are used to standardize the 'language of chemistry' and to identify elements and atoms in a chemical formula easily. Chemical symbols consist of one or two letters, most often derived from the name of the element.

Explanation:

Answer:

Explanation:

A chemical symbol is a notation of one or two letters representing a chemical element. Its used to  identify elements and atoms in a chemical formula easily. Chemical symbols consist of one or two letters, most often derived from the name of the element.

Considering the definition of molality, the molality of the KCl in the solution is 6.56 moles/kg.

Molality, or molal concentration, is the amount of a substance dissolved in a given mass of solvent. It is defined as the moles of a solute per kilogram of solvent.

The Molality of a solution is determined by the expression:

molality= number of moles of solute÷ kilograms of solvent

In this case, you know:

Replacing in the definition of molality:

Molality= 1.41 moles÷ 0.215 kg

Molality= 6.56 moles/kg

The molality of the solution is 6.56 moles/kg.

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Answer:

Starch is a natural polymer composed of glucose molecules.

Explanation:

Monke demands points.

The states of matter and balanced equations are as follows:

Chemical bonds are broken and new bonds are formed during chemical reactions, but atoms in the reactants do not disappear and new atoms do not form products. Chemical reactions do not create or destroy atoms. The same atoms that were present in the reactants are present in the products—they are just rearranged in different configurations. must exist in

The subscript is part of the formula and should not be changed once the reactant and product formulas have been determined. The coefficients indicate the number of each substance involved in the reaction and can be changed to balance the equation.

In the presence of heat Gold (ll) acetate decomposes:

Au(C₂H₃O₂)₂ (s) --> Au (s) + 2CO₂ (g) + 3H₂O (g)

Aluminum wire is added to the solution of nickel (ll) nitrate:

Al (s) + Ni(NO₃)₂ (aq) --> Al(NO₃)₃ (aq) + Ni (s)

A solution of sodium phosphate is added to the solution of ammonium chromate:

Na₃PO₄ (aq) + NH₄CrO₄ (aq) --> NaCrO₄ (aq) + NH₄PO₄ (aq)

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(B)

Explanation:

2.50 M KCl = (2.50 mol KCl/L)(0.600 L) = 1.50 mol KCl

molar mass of KCl = 74.5513 g KCl/mol

1.50 mol KCl × (74.5513 g KCl/mol) = 112 g KCl

I know it this one is easy I had the same one.

Answer:

spinning top is the answer

Answer:

Explanation:

The whole sample is 269

%copper = 127/269 * 100 = 47.2%

%chlorine = 142/269 * 100 = 52.8%

That's all you are asking. Is there more?

Answer:

While weathering and erosion are similar processes, they are not synonymous. Weathering involves the breakdown of rocks and minerals on Earth, whereas erosion involves the removal of soil and rock materials.

Answer:

[tex]n_b=0.947 Bohr\ magnetons/atom[/tex]

Explanation:

From the question we are told that:

Atomic radius [tex]r=0.126 nm[/tex]

Saturation flux density [tex]B= 0.69 T[/tex]

Generally the equation for number of Bohr magnetons per atom is mathematically given by

 [tex]n_b=\frac{B_s*Vc}{\mu_0*\mu_b}[/tex]

Where

 [tex]\mu_0=Magnetic\ permeability[/tex]

 [tex]\mu_0=1.257 * 10^{-6}[/tex]

 [tex]\mu_b=Magnetic\ Moment\ of\ an\ Atom[/tex]

 [tex]\mu_b=9.27* 10^{-24}[/tex]

 [tex]Vc=d^3[/tex]

 [tex]Vc=(2(0.126*10^-9))^3[/tex]

 [tex]Vc=1.6*10^{-29}[/tex]

Therefore the number of Bohr magnetons per atom for this material

 [tex]n_b=\frac{0.69*1.6*10^{-29}}{1.257 * 10^{-6}*9.27* 10^{-24}}[/tex]

 [tex]n_b=0.947 Bohr\ magnetons/atom[/tex]