Zn + CuSO4 → Zn2SO4 + Cu

How much zinc is needed to completely react with 4.2mol of copper (II) sulfate?

Answer:

Matter or energy can change from one form to the other

Explanation:

The law of conservation of energy states that energy can neither be created nor destroyed but can only be transformed i.e. changed from one form to another. For example, mechanical energy can be changed to electrical energy.

Likewise, the law of conservation of mass/matter states that matter can not be destroyed or created but can change via physical or chemical means to conserve it. For example, matter can change from liquid state to gaseous state.

From the above two laws, it can be said that "matter or energy can change from one form to the other".

The cation and anion then attract one another through the Coulomb force to form an ionic bond. Each ionic bond is formed between two oppositely charged ions, such as a sodium ion and a chloride ion.  Ionic bonding typically occurs between a metal and a nonmetal. Therefore, option B is the correct answer.

Ionic bond forms between a cation and an anion. Ionic bonds occur when a cation (positive ion) interacts with an anion (negative ion) through the Coulomb force. This electrostatic interaction is so powerful that the two ions become inseparable.The correct option is B. A cation and an anionIonic bonding is a type of chemical bonding in which ions with opposite charges are held together by electrostatic attraction. Ionic bonding takes place when one atom completely removes an electron from another, creating ions. When this occurs, the atom that has lost the electron becomes a cation, and the atom that has gained the electron becomes an anion. The cation and anion then attract one another through the Coulomb force to form an ionic bond. Each ionic bond is formed between two oppositely charged ions, such as a sodium ion and a chloride ion.  Ionic bonding typically occurs between a metal and a nonmetal. Therefore, option B is the correct answer.

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Ca(OH)2 (aq) because of elements oxygen and hydrogen

Ca(OH)2(aq)+H2SO4(aq)—→ CaSO4(s)+ 2H2O(l)

Answer:

your answer is D

Explanation:

Answer:

The answer is below

Explanation:

Resolution is the smallest unit of measurement that can be measured by a measuring instrument. Each point on the ruler is 0.1 cm and the difference between any two points, about 0.01 cm cam be measured. The minimum measurement (resolution) that can be measured by the ruler is 0.01 cm (two decimals), therefore it cannot measure up to three decimal places such as numbers like 2.755.

Explanation:

first of all open the menu

The decay of Bi-210 (Bismuth-210) is considered a transmutation because it involves the conversion of one element into another through nuclear reactions. In this case, the decay of Uranium in Earth's crust leads to the production of the isotope Rn-222 (Radon-222).

The Radon-222 decays, it goes through a series of steps, as shown on the graph below, ultimately resulting in the formation of Pb-206 (Lead-206). One of these steps in the decay series is the transformation of Bi-210 into another element. This occurs due to the emission of particles from the nucleus of the Bi-210 atom, leading to a change in the number of protons and/or neutrons in the nucleus. As a result, the Bi-210 atom becomes a different element altogether, which is why the decay of Bi-210 is considered a transmutation. In areas where the ground is more porous, the Rn-222 isotope can leak into the basements of homes, making it important to understand and monitor the decay process of these isotopes, including the transmutation of elements like Bi-210.

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Answer:

Mass and Volume

Explanation:

The formula for density is

\(\frac{Mass}{Volume}\)

Milk

Explanation:

because milk is very thick youknow here I go

The two elements which will form positive ions with +2 charge are magnesium and beryllium.

Cations will be formed when atoms loses their electrons from the outermost shell to get stability, so that they will get positive charge on itself.

Hence magnesium and beryllium will show +2 charge.

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1,6,4 coefficients ensure that there are equal numbers of atoms of each element on both sides of the equation. So correct option is A.

A chemical equation is a symbolic representation of a chemical reaction, which shows the reactants, products, and their relative amounts. It is a shorthand way of describing a chemical reaction using chemical symbols and formulas.

A chemical equation consists of two sides, the reactant side and the product side, separated by an arrow, which represents the direction of the reaction. The reactant side lists the starting materials or reactants, while the product side lists the substances that are formed as a result of the reaction.

The balanced chemical equation for the reaction is:

P4O10 + 6 H2O → 4 H3PO4

The correct set of coefficients to balance the equation is:

A.  1,6,4

These coefficients ensure that there are equal numbers of atoms of each element on both sides of the equation.

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To calculate the error in a standard solution of chemistry 14cl, you need to first measure the exact mass of the solution and subtract the amount you initially put in the solution. The result is the error.

For example, if you put 10 g of chemistry 14cl into a solution and measure the exact mass to be 10.4 g, the error would be 0.4 g.

To calculate the error in a standard solution in chemistry, you need to follow these steps:

1. Calculate the amount of substance you should have in your solution. This is typically given in the question, or you can calculate it using the formula n = cV, where n is the amount of substance, c is the concentration, and V is the volume.

2. Calculate the amount of substance you actually have in your solution. This can be done by weighing the solution and using the formula m = nM, where m is the mass, n is the amount of substance, and M is the molar mass.

3. Calculate the difference between the amount of substance you should have and the amount you actually have. This is the error in your solution.

4. Divide the error by the amount of substance you should have to get the percent error. This is typically reported as a percentage.

For example, if you were supposed to have 14cl of a substance in your solution, but you actually have 13.8cl, the error would be 0.2cl. The percent error would be (0.2/14) * 100 = 1.43%.

So, the error in a standard solution in chemistry can be calculated by finding the difference between the amount of substance you should have and the amount you actually have, and then dividing by the amount you should have to get the percent error.

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A given substance that has a melting point of -7C and a boiling point of 59C exists as a liquid at room temperature conditions.

The states of matter refer to the separation of the molecules of a given material in certain temperature conditions.

The states of the matter are three and include the gaseous state, liquid state and solid-state.

In conclusion, a given substance that has a melting point of -7C and a boiling point of 59C exists as a liquid at room temperature conditions.

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Answer:

Li atoms readily give up one electron to form positively charged, Li+ ions. These ions have the same stable electron configuration as the noble gas helium. All Group 1 atoms can lose one electron to form positively charged ions.

Explanation:

I DON'T KNOW IF THIS IS THE RIGHT ANSWER BUT I'M TRYING TO JUST ANSWER.

Answer:

Explanation:

-We know that an atom is table if they have 8 valence electrons (like noble gases, they are stable)

-Group 1 atoms only has 1 valence electron, in order to become stable, they are desperately wanted to lose that one valence electron to become stable.

-While group 15 has 5 electrons, it is easier for them to gain 3 electrons to become 8 electrons than losing all 5 electrons.

-the same thing for group 16 has 6 valence electrons and 17 has 7 electrons. It is easier for them to gain 2 and 1 more valence electrons to become stable.

Hope this helps!

Answer:

3.41 x 10^7

Explanation:

At the stoichiometric point for a titration between hydrochloric acid (HCl) and ammonia (NH₃), the pH is expected to be greater than 7. The correct option is (a) > 7.

In the given titration, hydrochloric acid (HCl) is a strong acid, and ammonia (NH₃) is a weak base. At the beginning of the titration, the hydrochloric acid is in excess, and the solution is acidic, resulting in a pH less than 7. As the titration proceeds and ammonia is gradually added, it reacts with the hydrochloric acid to form ammonium chloride (NH₄Cl).

At the stoichiometric point, the moles of hydrochloric acid and ammonia are in the ratio dictated by the balanced chemical equation. This point signifies that all the hydrochloric acid has reacted with the ammonia, and no excess of either is present in the solution. The resulting solution consists mainly of the ammonium chloride salt.

Ammonium chloride is the salt of a weak base (ammonia) and a strong acid (hydrochloric acid). When dissolved in water, it undergoes hydrolysis, releasing H+ ions, which makes the solution acidic. Therefore, at the stoichiometric point of this specific titration, the pH is expected to be greater than 7, indicating an acidic solution.

It's important to note that this is a generalization and can vary depending on the specific titration and the concentrations of the reactants involved. However, in the given context of a titration between hydrochloric acid and ammonia, the pH at the stoichiometric point is expected to be greater than 7.

The correct option is a.

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The electrochemical cell given is a standard hydrogen electrode (SHE) coupled with a nickel electrode. Any change that decreases the potential of the nickel electrode or the standard electrode potential of the SHE will cause the E°cell of the cell to decrease.

The notation used to represent the cell is \(Ni(s) | Ni^{2} (1 M) || H+(1 M) | H^{2} (1 atm) | Pt(s).\)In this notation, the double vertical lines (||) represent the boundary between the two half-cells of the cell, and the single vertical line (|) represents the phase boundary between the electrode and the electrolyte.

The standard cell potential (E°cell) of the cell is calculated using the Nernst equation: E°cell = E°cathode - E°anode, where E°cathode and E°anode are the standard electrode potentials of the cathode and anode, respectively.

In this case, the nickel electrode is the cathode and the SHE is the anode. The standard electrode potential of the SHE is defined as 0 volts by convention, so the E°cell of the cell is determined solely by the standard electrode potential of the nickel electrode, which is +0.25 volts.

If any change is made to the cell that decreases the potential of the nickel electrode, the E°cell of the cell will decrease. One possible change that could cause this is the addition of a stronger oxidizing agent than Ni2+ to the Ni2+ solution, which would result in the oxidation of nickel ions to nickel atoms.

This would decrease the concentration of Ni2+ ions in solution and shift the equilibrium towards the reactants, Ni(s) and Ni2+(1 M). This would cause the potential of the nickel electrode to decrease, and hence the E°cell of the cell would also decrease.

Another possible change that could decrease the potential of the nickel electrode is the increase in the concentration of H+ ions in the acidic electrolyte. This would increase the activity of the H+ ions and shift the equilibrium towards the reactants, H+ and H2. As a result, the potential of the SHE would decrease, and hence the E°cell of the cell would also decrease.

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The number of moles of NH3 that can be produced is 19.3 moles.

From the balanced equation of the reaction, the mole ratio of H2 reacted and NH3 produced is 3:2.

This means that for every 1 mole of H2 that reacts, 2/3 mole of NH3 will be produced.

Now, we have 29.0 moles of H2 reacting. If 1 mole of H2 produces 2/3 moles NH3, then 29 moles of H2 will produce:

                       29 x 2/3 = 19.3333 moles of NH3

To three significant figures, 19.333 moles will be 19.3 moles.

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The pOH value of solution will be  -5.54.

By calculating the concentration of OH ions in a solution, pOH can be used to gauge how acidic or alkaline a solution is. The OH ion concentration's negative logarithm would be known as pOH.

Given that:

pH = 7.5

kw = 8.48×\(10^{-14}\)

pH = - log [\(H^{+}\)]

[\(H^{+}\)] = \(10^{-pH}\)

Put the value of pH in above equation.

[\(H^{+}\)]  = \(10^{-7.5}\)

[\(H^{+}\)] = 3.16 × \(10^{-8}\)

Put the value of given data in above equation.

[\(OH^{-}\)] =Kw / \([H^{+} ]\)

[\(OH^{-}\)]  =  8.48×\(10^{-14}\) /  3.16 × \(10^{-8}\)

[\(OH^{-}\)] = 2.6 × \(10^{-6}\).

pOH  = -log [\(OH^{-}\)]

pOH = =log [ 2.6 × \(10^{-6}\)]

pOH = log [2.9] - 6log 10

pOH = 0.46 -6

pOH = -5.54

Therefore, the pOH value will be -5.54

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Boyle's law, also known as Mariotte's law, is a relationship describing how a gas will compress and expand at a constant temperature.

Thus, The pressure (p) of a given quantity of gas changes inversely with its volume (v) at constant temperature, according to this empirical connection, which was established by the physicist Robert Boyle in 1662.

In equation form, this means that pv = k, a constant. The French physicist Edme Mariotte also found the connection.

With the assumption of an ideal (perfect) gas, the law can be derived from the kinetic theory of gases. At sufficiently low pressures, real gases follow Boyle's law, albeit at higher pressures, when the gas starts to deviate from ideal behaviour, the product pv typically drops off slightly.

Thus, Boyle's law, also known as Mariotte's law, is a relationship describing how a gas will compress and expand at a constant temperature.

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Titration is a laboratory technique used to determine the concentration of a solution by adding a solution of known concentration to it until a reaction occurs.

The point at which the reaction is complete is called the equivalence point, and it can be identified using an indicator or by monitoring the pH of the solution. The amount of the known solution required to reach the equivalence point is used to calculate the concentration of the unknown solution.

Titration is commonly used in chemistry to analyze the properties of acids and bases, as well as in pharmaceuticals, food science, and environmental testing.

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Answer:

Mass = 917.4 g

Explanation:

Given data:

Number of molecules = 3.00 ×10²⁴ molecules

Mass in gram = ?

Solution:

1 mole contain 6.022 × 10²³ molecules

3.00 ×10²⁴ molecules × 1 mol /  6.022 × 10²³ molecules

0.5×10¹ mol

5 mol

Mass in gram:

Mass = number of moles  × molar mass

Mass = 5 mol  × 183.48 g/mol

Mass = 917.4 g

Answer:

A Biome is way bigger than a ecosystem

Explanation:

answer: biome

because many ecosystems can make up a single biome.

The direction of V is 39.29° (approx) below the negative x-axis.Hence, the direction of V is 39.29° (approx) below the negative x-axis.

Given that Vx​=7.70 units and

Vy​=−6.00 units.

We need to determine the (a) the magnitude and (b) direction of V.

Step 1:Let's apply Pythagoras theorem to find the magnitude of V.

It is given that, Vx​=7.70 units and Vy​=−6.00 units.

By Pythagoras theorem, we have,

V = √Vx​2 + Vy​2V

= √(7.70)2 + (−6.00)2V

= √(59.29) V = 7.70 units (approx)

Therefore, the magnitude of V is 7.70 units (approx).

Step 2:Let's determine the direction of V.Since Vx​=7.70 units is positive and Vy​=−6.00 units is negative.

Therefore, the vector V lies in the fourth quadrant.In the fourth quadrant, tanθ = Vy​/Vx​tanθ

= (-6.00) / (7.70)tanθ

= - 0.77922θ

= tan-1 (-0.77922)θ

= -39.29°

The direction of V is 39.29° (approx) below the negative x-axis.Hence, the direction of V is 39.29° (approx) below the negative x-axis.

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Answer:

Composition. The ingredients of the solar nebula fell into 4 categories based on their condensation temperatures: metals, rocks, hydrogen compounds (water, methane, ammonia), and light gasses (hydrogen and helium).

Explanation:

Answer:

This page looks at the manufacture of alcohols by the direct hydration of alkenes, concentrating mainly on the hydration of ethene to make ethanol.

The steps in the ethanol production process include milling the corn to meal, liquefying the meal by adding water and cooking, breaking down starch into sugar, using yeast to ferment the sugar to ethanol, distilling the ethanol by boiling off and condensing it by removing residual water and finally denaturing so that...

The potential energy involved in intermolecular forces is intermolecular potential energy.

Intermolecular potential energy is the energy possessed by the random motion of molecules. The molecules in every matter exert forces on each other. It involves the forces between molecules. Intermolecular potential energy depends on the magnitude of the intermolecular forces and the position the molecules have relative to each other at any time.

According to postulates of kinetic theory, molecules move randomly and exert forces on each other. Also, there are present molecular attractions and repulsions among them. Molecules are dislocated at every instant of time. Hence as they have any internal forces exerting on each other it means it is a kind of potential energy generated by their randomness.

Therefore intermolecular potential energy is developed by molecules by virtue of their relative change in position.

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Answer:

The density of the mystery metal is 2.7g/cm^3.  It is likely aluminum, Al.

Explanation:

Density is defined as (mass/unit volume).  We know the volume of the metal sample by the fact it displaced 6.2 ml of water.  Since the mateal sample had a mass of 16.74 grams, we find the density by dividing the mass by the volume:

Density = (mass)/(volume) = (16.74g)/(6.2ml)

Density = 2.7 g/ml

Note that the ubntis for density can vary greatly. kg/cm^3 is a possible unit.

since 1 ml = 1 cm^3, we can also say the density of the metal sample is 2.7 g/cm^3.  [This is a more common unit for this type of measurement]

A reference book of densities can be search to find what metals have this density.  See the attached excerpt form one such table.

While not definitive, it can be seen that aluminum, Al, is a good candidate for the ID of this metal.  It has a density of 2.7 g/cm^3, although different forms may deviate slightly.  The metal is most likely aluninum.