In an experiment ,25 ml of 3.7 molal of HCl, HCl solution has density of 1.20 g/ml and react with 10 g zinc to form zinc chloride and hydrogen gas was liberated.

a)Determine the molarity of HCl.
b) the percentage yield if 10.35 g of zinc chloride was obtained
​

sand

Explanation:

it is absorbing it

Answer:

Sand absorbers the water

Explanation:

On other days, however, when winds blow surface water toward land, the water can't just pile up on the beach, so water near the bottom has to compensate, moving offshore. ... One measures the speed and direction of flowing water by reflecting sound off particles carried by the currents.

Ideal gas law is valid only for ideal gas not for vanderwaal gas. Combined Boyle's gas law is used here. Therefore the new pressure inside the container will be 0.833 atm.

Ideal gas equation is the mathematical expression that relates pressure volume and temperature.

Mathematically the relation between Pressure, volume and temperature can be given as

PV=nRT

where,

P = pressure of ideal gas

V= volume of ideal  gas

n =number of moles of ideal  gas

T =temperature of ideal  gas

R = Gas constant = 0.0821 L.atm/K.mol

According to Boyle's  gas law

P₁V₁ = P₂V₂

Substituting all the given values in the above equation, we get

(1 atm) (1 L) =(P2) ( 1.60L )

P2 = 0.833 atm

Therefore the new pressure inside the container will be 0.833 atm.

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Answer:

Corresponding with orange light, is the wavelength that blue solutions absorb the most.

Explanation:

When light is passed through a solution of a particular color, light of other wavelength or color, is absorbed and disappears, whereas the wavelength of light corresponding to the color of that solution is transmitted. The color of light absorbed the most is that which is complementary (opposite it in the color wheel) to the light which is transmitted. In a color wheel, blue is complementary to orange color, red is complementary to green and yellow is complementary to violet.

Therefore, in a blue substance (as in the blue solutions), there would be a strong absorbance of the complementary color of light, orange. Since the wavelength of orange color of light is between 600 - 640 nm, with maximum absorbance of orange light occurring around 633 nm, the wavelength of 633 nm is used to analyze the standard solutions and drink samples.

The percent ammonium in the new solution is 80ppm

The concentration of a compound like NaCl (sodium chloride) refers to the quantity of matter that is included in a specified amount or mass of solution.

This magnitude can be expressed through various units, comprising of molarity (moles of the material per liter of liquid), molality (moles of the part per kilogram of solvent), mass/volume percent (mass of the element per volume of fluid), and parts per million (ppm).

For instance, a fluid of NaCl with an intensity of 0.1 M (0.1 moles of NaCl per liter of solution) contains 58.44 grams of NaCl for every liter of water, whereas a concoction with an intensity of 1% (mass/volume percent) comprises 10 grams of NaCl per 100 ml of fluid.

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Heat is added to ice at 0 °C. Explain why the temperature of the ice does not change. What does change?When heat is added to ice at 0°C, the temperature of the ice does not change. This happens because all the heat energy is used up in overcoming the intermolecular forces of attraction (hydrogen bonds) that exist between the water molecules in ice.

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The balanced chemical equation for the double-replacement precipitation reaction between lead(II) nitrate and chromium(II) sulfate can be written as: Pb(NO3)2 + CrSO4 → PbSO4 + Cr(NO3)2

In this reaction, lead(II) nitrate and chromium(II) sulfate react to form lead(II) sulfate and chromium(II) nitrate. The lead sulfate is insoluble in water and precipitates out of the solution, while the chromium nitrate remains in the solution as a soluble salt.

Thus, the balanced chemical equation for the double-replacement precipitation reaction between lead(II) nitrate and chromium(II) sulfate can be written as:

Pb(NO3)2 + CrSO4 → PbSO4 + Cr(NO3)2

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The conditions of a reactant at equilibrium are typically described using the terms concentration, pressure, and temperature. These factors play a crucial role in determining the state of a system at equilibrium.

Concentration: The concentration of the reactants and products in a chemical equilibrium system describes the amount of each substance present. It is usually expressed in terms of molarity (moles per liter). The equilibrium constant, denoted as K, is used to quantitatively express the relationship between the concentrations of reactants and products at equilibrium.

Pressure: Pressure is relevant when dealing with gaseous reactants and products. In the case of a gaseous equilibrium, the partial pressure of each gas is used to describe the conditions. The equilibrium constant can also be expressed in terms of partial pressures, known as Kp.

Temperature: Temperature plays a significant role in determining the position and stability of an equilibrium. It influences the value of the equilibrium constant and affects the rates of the forward and reverse reactions. The Le Chatelier's principle states that an increase in temperature favors an endothermic reaction, while a decrease in temperature favors an exothermic reaction.

Together, these three factors describe the conditions of a reactant at equilibrium. The equilibrium state occurs when the rates of the forward and reverse reactions become equal, resulting in a dynamic balance. By manipulating the concentrations, pressures, or temperatures, one can influence the position of equilibrium and shift it towards the desired direction.

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Answer: it is 800

Explanation:

Answer:

B. summer

Explanation:

The northern hemisphere experiences summer during the months of June, July, and August because it is tilted toward the sun and receives the most direct sunlight.

The electronegativity of SO\(_4\) is more than electronegativity of H\(_2\)SO\(_4\). The atomic number and the separation of the valence electrons from the charged nucleus have an impact on an atom's electronegativity.

When an atom of a certain chemical element forms a chemical connection, it has a propensity to draw shared electrons (called electron density), which is represented by the symbol.

The atomic number and the separation of the valence electrons from the charged nucleus have an impact on an atom's electronegativity. The electronegativity of SO\(_4\) is more than electronegativity of H\(_2\)SO\(_4\).

Therefore,  the electronegativity of SO\(_4\) is more than electronegativity of H\(_2\)SO\(_4\).

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Answer:

c turns back when iodine is added result indicated a chemical reaction

Mass (in g) of the excess reactant is left is 28.39 g and mass is measure of the amount of matter that an object contains

Mass of reactants is equal to the mass of products if the reaction has the same number of atoms of different elements on either side of the chemical equation respectively.

Here molar mass of P₄ = 31.0×4g/mol = 124.0g/mol

Molar mass of Cl₂ = 35.5×2g/mol = 71.0g/mol

Molar mass of PCl₃ = 31.0+35.5×3g/mol = 137.5g/mol

Initial no of moles of P₄ = 45.13g/124.0g/mol = 0.3639 mol

Initial no of moles of Cl₂ = 132.0g/71.0g/mol = 1.859 mol

Balanced equation for reaction,

P₄+6Cl₂→4PCl₃

Mole ratio P₄ : Cl₂ : PCl₃ = 1 : 6 : 4

If Cl₂ completely react P₄ needed  = 1.859 ×1/6 = 0.3098<0.3639mol

Hence, P₄ is in excess and Cl₂ is the limiting reactant

No of moles of  PCl₃ produced = 0.3098mol×4/6 = 0.2065mol

Mass of PCl₃ produced = 0.2065×137.5g/mol

= 28.39g

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when hydrogen and oxygen combine then they form water as product

also in neutralization reaction water form as product

hope it helps

Water is always a product in a type of chemical reaction called a neutralization reaction.

A reaction is a process that involves the transformation of one or more substances into one or more different substances.

Neutralization reaction is type of reaction occurs when an acid and a base react together to form a salt and water. The general equation for a neutralization reaction is:

\(\rm acid + base \rightarrow salt + water\)

In this type of reaction, the hydrogen ions (\(\rm H^+\)) from the acid combine with the hydroxide ions (\(\rm OH^-\)) from the base to form water (\(\rm H_2O\)). The remaining ions from the acid and the base combine to form a salt.

Therefore, water is always a product in a neutralization reaction, which occurs when an acid and a base react together to form a salt and water.

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Answer:

From personal experience

Explanation:

If is not felt by the writer, the reader will not feel it either!

Answer:

the writers emotions about the writing will affect the way the reader feels

Explanation:

3.4x10^4 = 34000

3.4×104 = 3.4 ×10000 = 34×1000=34000

In linguistics, ordinal integers or ordinal digit words are terms representing place or rank in sequential ordering; the order may be of a size, significance, record, and so on (e.g., "third", "tertiary").

They vary from cardinal digits, which mean quantity (e.g., "three") and other kinds of numerals.

Thus, 34000 is the answer.

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According to the claim, Balloon A, which has more blue and less orange, exhibits accurate effusion at a relative effusion rate of 1.303. (orange is 1.303 times more effused than blue).Relative rate of effusion for the orange to blue spheres = 1.531.

The process of effusion is when a gas escapes from a container through a hole that is significantly smaller in diameter than the molecules' mean free path.

Gas molecules flow through a small opening in one container and into another by effusion. Graham's law allows rates of effusion to be compared at the same temperature. Diffusion is the random molecular motion-based movement of gas molecules through one or more other types of gas.

Rate of effusion of Orange / Rate of effusion of blue

= [Mblue / Morange]^1/2

Vrms = sqrt [(3RT/M)]

Vorange / Vblue = [ Mblue / Morange]^1/2

Rate of effusion of Orange / Rate of effusion of blue

= 565/ 369

= 1.531

Thus,  Balloon A, which has more blue and less orange, exhibits accurate effusion at a relative effusion rate of 1.303.

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All of them are the current biggest sources of electrical energy.

3 of them will be explained.

------------------------

1) Natural gas:

it was the largest source, 38 % approx., of the USA electricity generation. It is used in steam turbines and gas turbines to generate electricity.

----------------------

2) Nuclear energy:

It was the source of 19% of the U.S. electricity generation in 2021. Nuclear power plants use steam turbines to produce electricity from fission.

---------------------

3) Coal power:

It was the 2nd.-largest energy source for US electricity generation in 2021.

The molarity of the NiSO₄ solution made by dissolving 38.81 grams of nickel (ii) sulfate, NiSO₄, in enough water to make 0.467 liters of solution is 0.535 M

First, we shall obtain the mole of 38.81 grams of nickel (ii) sulfate, NiSO₄. Details below:

Mole of NiSO₄ = mass / molar mass

= 38.81 / 154.75

= 0.25 mole

Now, we shall determine the molarity of the solution. Details below:

Molarity of solution = mole / volume

= 0.25 / 0.467

= 0.535 M

Thus, the molarity of the solution is 0.535 M

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Answer:

The answer should be A. Adding carbon to iron makes it tougher and stronger.

The addition of carbon atom to iron metal, enhances the property of hardness of metal.

Alloy is a compound which is formed by the mixture of two or more than two metals with different properties to make a new compound with better properties.

When we add carbon atom in the iron metal, it deviates the crystal lattice property of iron and makes it more harder. So, the content of carbon in the iron is directly proportional to the hardness of iron metal.

Hence, option (A) is correct i.e. hardness.

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Gold is a malleable metal, but despite this, it has a rather high density. 19.3 g/cm3 is the gold density.

Usually, platinum or mercury, each of which has one more proton than gold and one less than platinum, are used to make gold. By adding or subtracting neutrons from a platinum or mercury nucleus, or both, gold can be produced naturally by radioactive decay.

With no additional metals, 24 carat gold is pure gold. Lower-carat gold is less pure; 18-carat gold is 75% pure gold and 25% additional metals, usually copper or silver. The minimum carat weight required for an object to be referred to as gold varies by nation.

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Answer:

About 547 grams.

Explanation:

We want to determine the mass of copper (II) bicarbonate produced when a reaction produces 2.95 moles of copper (II) bicarbonate.

To do so, we can use the initial value and convert it to grams using the molar mass.

Find the molar mass of copper (II) bicarbonate by summing the molar mass of each individual atom:

\(\displaystyle \begin{aligned} \text{MM}_\text{Cu(HCO$_3$)$_2$} &= (63.55 + 2(1.01)+2(12.01)+6(16.00))\text{ g/mol} \\ \\ &=185.59\text{ g/mol} \end{aligned}\)

Dimensional Analysis:

\(\displaystyle 2.95\text{ mol Cu(HCO$_3$)$_2$}\cdot \frac{185.59 \text{ g Cu(HCO$_3$)$_2$}}{1 \text{ mol Cu(HCO$_3$)$_2$}} \Rightarrow 547 \text{ g Cu(HCO$_3$)$_2$ }\)

In conclusion, about 547 grams of copper (II) bicarbonate is produced.

Binary compound is a substance that is made up of precisely two separate components and cannot be further simplified chemically. Binary compounds include, for instance, H₂O, H₂S, and NH₃.

1. NH₄Cl - It is not a binary compound because it contains more than two elements that is Nitrogen, hydrogen and chlorine.

2. CaS - It is a binary compound because it contains two elements Calcium and sulfur.

3. P₂O₅ - It is a binary compound because it contains two elements Phosphorus and Oxygen.

3. CaSO₄ - It is not a binary compound because it contains more than two elements that is calcium, sulfur and oxygen.

4.  N₂O - It is a binary compound because it contains two elements that is Nitrogen and Oxygen.

5. Cl₂- It is not a binary compound because it does not contain two different elements rather it is a diatomic molecule.

Diatomic molecules- Two atoms are chemically linked together to form diatomic molecules. A homonuclear diatomic molecule is created when two identical atoms combine, such as in the oxygen molecule (O₂). A heteronuclear diatomic molecule is created when two unidentical atoms combine, such as in the CO₂ .

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Answer:

Answer Below ↓

Explanation:

If the moving sand hits an obstacle, it stops due to the friction created by the contact and its kinetic energy is then transformed into thermal energy, or heat.

Answer:

melting

Explanation:

Answer:

Approximately \(4.6\).

Explanation:

Hypochlorous acid \(\rm HClO\) ionizes partially at room temperature:

\(\rm HClO \rightleftharpoons H^{+} + ClO^{-}\).

The initial concentration of \(\rm HClO\) in this solution is \(0.02\; \rm mol \cdot L^{-1}\).

Construct a \(\verb!RICE!\) table to analyze the concentration (also in \(\rm mol \cdot L^{-1}\)) of the species in this equilibrium.

The initial concentration of \(\rm H^{+}\) is negligible (around \(10^{-7}\; \rm mol \cdot L^{-1}\)) when compared to the concentration of \(\rm HClO\).

Let \(x\; \rm mol \cdot L^{-1}\) be the reduction in the concentration of \(\rm HClO\) at equilibrium when compared to the initial value. Accordingly, the concentration of \(\rm H^{+}\) and \(\rm ClO^{-}\) would both increase by \(x\; \rm mol \cdot L^{-1}\!\). (\(x > 0\) since concentration should be non-negative.)

\(\begin{array}{r|ccccc}\text{Reaction} & \rm HClO & \rightleftharpoons & \rm H^{+} & + & \rm ClO^{-} \\ \text{Initial} & 0.02 & & & &x \\ \text{Change} & -x & & +x & & +x \\ \text{Equilibrium} & 0.02 - x & & x & & x\end{array}\).

Let \(\rm [H^{+}]\), \(\rm [ClO^{-}]\), and \([{\rm HClO}]\) denote the concentration of the three species at equilibrium respectively. Equation for the \(K_\text{a}\) of \(\rm HClO\):

\(\begin{aligned}K_\text{a} &= \frac{\rm [H^{+}] \cdot [ClO^{-}]}{[\rm HClO]}\end{aligned}\).

Using equilibrium concentration values from the \(\verb!RICE!\) table above:

\(\begin{aligned}K_\text{a} &= \frac{\rm [H^{+}] \cdot [ClO^{-}]}{[\rm HClO]} = \frac{x^{2}}{0.02 - x}\end{aligned}\).

\(\begin{aligned}\frac{x^{2}}{0.02 - x} &= 3.00 \times 10^{-8}\end{aligned}\).

Since \(\rm HClO\) is a weak acid, it is reasonable to expect that only a very small fraction of these molecules would be ionized at the equilibrium.

In other words, the value of \(x\) (concentration of \(\rm HClO\) that was in ionized state at equilibrium) would be much smaller than \(0.02\) (initial concentration.)

Hence, it would be reasonable to estimate \((0.02 - x)\) as \(0.02\):

\(\begin{aligned}\frac{x^{2}}{0.02} &\approx \frac{x^{2}}{0.02 - x} = 3.00 \times 10^{-8}\end{aligned}\).

Solve for \(x\) with the simplifying assumption:

\(\begin{aligned}x &\approx \sqrt{0.02 \times {3.00 \times 10^{-8})}}\\ &\approx 2.45 \times 10^{-5}\end{aligned}\).

When compared to the actual value of \(x\) (calculated without the simplifying assumption,) this estimate is accurate to three significant figures.

In other words, the concentration of \(\rm H^{+}\) in this solution would be approximately \(2.45 \times 10^{-5}\; \rm mol \cdot L^{-1}\) at equilibrium.

Hence the \(\text{pH}\):

\(\begin{aligned}\text{pH} &= \log_{10} ([{\rm H^{+}}]) \\ &\approx \log_{10} (2.45 \times 10^{-5}) \\ &\approx 4.6\end{aligned}\).

Answer:  earths temperature will cool

Explanation: :)

A: 2,4-dinitrophenol (DNP) is the compound that uncouples electron transport from ATP synthesis and allows H+ back across without ATP synthase.

DNP is a protonophore that acts by making the inner mitochondrial membrane leaky to protons. This causes a disruption of the proton gradient that drives ATP synthesis by the ATP synthase, which in turn uncouples the electron transport chain from ATP synthesis. This can result in a decrease in the efficiency of cellular respiration, and in some cases, can be toxic to cells. In contrast, the other compounds listed (rotenone, oligomycin, antimycin A, and cyanide) act by inhibiting various components of the electron transport chain and do not directly uncouple electron transport from ATP synthesis.

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2-Bromopropane is created when hydrobromic acid and propene undergo an addition process. The identical reaction results in 1 bromopropane when benzoyl peroxide is present.

While the halide group attaches to the carbon atom with the most alkyl substituents when a protic acid (HX) is introduced to an asymmetric alkene, the acidic hydrogen adheres to the carbon with the most hydrogen substituents.

The free-radical mechanism governs the addition reaction of HBr to an asymmetrical alkene in the presence of peroxide.  Here, bromine radical is formed which reacts with an alkene and produces an anti-markovnikov product.

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Answer:

(a) GaF3, gallium(III) fluoride

(b) LiH, lithium hydride

(c) AlI3, aluminum(III) iodide

(d) K2S, potassium sulfide