Write the overall balanced cell reaction for the following voltaic cell Fe(s) | Fe2+ (aq) || Ag + (aq) | Ag(s) (Ctrl).

Answer:

Explanation:

If you have options, could you please tell me so I can further help you. If you just need an example then

Examples of pure substances include iron, steel, and water

Hope this helps (:

Answer

These are the following answers

A) zinc oxide

B) sugar dissolved in water

C) pond water

D) soil

Explanation:

The classification of the uses of the given elements are as follows:

Elements are pure substances which cannot be split into simpler units by ordinary chemical processes.

Elements are composed of atoms.

Elements can be classified into three:

Elements have several uses which depends on the properties of the element,

For example, metals are usually solids and are good conductors of heat and electricity, hence metals are used in construction of heating utensils and electrical wires.

Example of metals include: copper, gold, aluminum, nickel, lithium, etc.

Non-metals are usually gases or liquids and are poor conductors of heat ad electricity. Hence, non-metals are used as insulators as well as serve other purposes.

Examples of non-metals include: fluorine, iodine, oxygen, etc.

Semi-metals are poor conductors and are used as semi-conductors. Examples are germanium, and silicon.

Learn more about elements at: https://brainly.com/question/6258301

#SPJ1

A metal (M) forms a compound with formula MCl₂. The compound contains 57.69% Cl by mass and the metal is Chromium. Symbol of Chromium metal is Cr.

Given :

57.69 % Cl by mass means that 57.69 grams of chlorine present in 100 grams of compound.

Mass of compound = 100 g

Mass of chlorine = 57.69 g

Mass of metal = 100 - 57.69= 42.31 g

First, we will calculate the moles of chlorine, using formula

Moles = Given mass

              molar mass

Moles = 57.69

              35.45

Moles = 1.627 moles

The given formula of compound is, MCl₂

Therefore, ratio of M : Cl = 1 : 2

We will calculate the moles of metal,

2 moles of Cl combines with 1 mole of metal

1.627 mole of Cl combines with 1.627 = 0.813 mole of metal

                                                        2

calculate the molar mass of metal -

Molar mass of metal =   Given mass  

                                           moles

Molar mass = 42.31  g     = 52.04 g/mol

                       0.813 mol

The molar mass of metal is 52.04 g/mole.

From this, we can conclude that the metal is Chromium (Cr)  

So, the formula will be, CrCl₂

Hence, the identity of the metal is Chromium (Cr)

To learn more about metals,

brainly.com/question/10858963

#SPJ1

Answer:

0.67 moles of NH3 are required to react with 32.2 grams of O2.

Explanation:

To find the number of moles of NH3 required to react with 32.2 grams of O2, you will need to balance the chemical equation for the reaction and use the balanced equation to determine the mole ratio between the reactants.

The balanced equation for the reaction of NH3 with O2 is:

2 NH3 + 3 O2 -> 2 N2 + 6 H2O

From this equation, we can see that for every 2 moles of NH3 that react, 3 moles of O2 are also consumed. Therefore, the mole ratio between NH3 and O2 is 2:3.

Since we are given the mass of O2 in grams and we want to find the number of moles of NH3, we can use the molar mass of O2 to convert the mass to moles. The molar mass of O2 is 32.0 g/mol. Therefore, 32.2 grams of O2 is equivalent to 32.2 / 32.0 = 1.00625 moles of O2.

To find the number of moles of NH3 required, we can use the mole ratio to convert from moles of O2 to moles of NH3. Since the ratio is 2:3, we can multiply the number of moles of O2 by (2/3) to find the number of moles of NH3:

1.00625 moles O2 * (2 moles NH3 / 3 moles O2) = 0.67 moles NH3

This means that 0.67 moles of NH3 are required to react with 32.2 grams of O2.

The percent yield of the reaction is 45.44%

Percentage yield is basically,

 \(\rm Percent\ yield\ = \frac{actual\ yield}{theoretical\ yield} \times 100\)

2 NaOH + H₂SO₄ → Na₂SO₄ + 2 H₂O

To calculate the theoretical yield, consider the stoichiometry of the reaction.

2 moles of NaOH reacts with 1 mole of H₂SO₄ to give 1 mole of Na₂SO₄ and 2 moles of H₂O. The mole ratio of H₂SO₄ and Na₂SO₄ is 1:1

For this mole ratio to be useful, convert the given concentration of H₂SO₄ into moles.  

     \(\rm Molarity\ =\ \frac{No.\ of\ moles}{Volume\ of\ solution (L)}\)

            \(\rm 3.10\ =\ \frac{No.\ of\ moles}{0.125}\)

\(\rm No.\ of\ moles\ =\ 3.10 \times 0.125\\)

                     \(=\ 0.38\)

Since, mole ratio of H₂SO₄ and Na₂SO₄ is 1:1

Amount of Na₂SO₄ formed would be also 0.38 mol

Convert this amount in moles to amount in grams

\(\rm No.\ of\ moles\ =\ \frac{Mass\ formed\ }{Molecular\ mass}\)

\(\rm Mass\ formed\ =\ No.\ of\ moles\times molecular\ mass\)

                     \(\rm =\ 0.38\times 142.04\)

                     \(\rm =\ 53.97\ grams\)

Theorical yield of Na₂SO₄ is 53.97 grams

Therefore,   \(\rm Percent\ yield\ = \frac{actual\ yield}{theoretical\ yield} \times 100\)

                                          \(\rm =\ \frac{24.5}{53.97}\times 100\)

                                          =  45.44%

The percent yield of the reaction is 45.44%

To know more on percent yield, click on

https://brainly.com/question/12704041

#SPJ1

9.77 litres of NO2 are generated on average.

The balanced equation for the breakdown of N2O5 is as follows:

\(2N_2O_5(g) -- > 4NO_2(g) + O_2(g)\)

determine how many moles of N2O5 decompose:

\(V(N_2O_5) / Vm = n(N_2O_5)(N_2O_5)\)

where V(N2O5) = 4.86 dm3 is N2O5's volume and Vm(N2O5) is N2O5's molar volume under the circumstances stated in the ideal gas law:

\((R*T)/P = Vm = V/n\)

when the gas constant R is used.

the kelvin scale of temperature, T

The pressure is P.

The ideal gas law:

\(n(N_2O_5) = V(N2O5) / Vm(N_2O_5) = 4.86 dm3 / (24.46 L/mol) = 0.1982 mol\)

the number of moles of NO2 is:

\(n(NO_2 = 4/2 * n(N_2O_5) = 0.3964 mol\)

then,

\(n(NO_2 = 4/2 * n(N_2O_5) = 0.3964 mol\)

to know more about the reaction here:

brainly.com/question/28984750

#SPJ1

Chemical reactions like Canizzaro reaction involves  a chemical reaction which involves base-induced disproportionation of two molecules of  non-enolizable aldehyde to give a primary alcohol and a carboxylic acid while Stephen reaction involves the preparation of aldehydes from nitriles using tin(II) chloride,hydrochloric acid and quenching the resulting iminium salt with water.

Chemical reactions are defined as reactions which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical reaction.

There are several characteristics of chemical reactions like change in color, change in state , change in odor and change in composition . During chemical reaction there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

Learn more about chemical reactions,here:

https://brainly.com/question/29762834

#SPJ1

The volume of the solution is 24.8 milliliters (mL).

To solve this problem, we can use the formula:

Molarity (M) = moles of solute / liters of solution

We are given the mass of CuNO3 and the molarity of the solution, so we can first calculate the number of moles of CuNO3:

moles of CuNO3 = mass / molar mass

molar mass of CuNO3 = 63.55 + 14.01 + 3(16.00) = 187.56 g/mol (using atomic weights from the periodic table)

moles of CuNO3 = 3.90 g / 187.56 g/mol = 0.0208 mol

Next, we can rearrange the formula for molarity to solve for the volume of the solution:

liters of solution = moles of solute / Molarity

liters of solution = 0.0208 mol / 0.840 M = 0.0248 L

Finally, we can convert liters to milliliters:

volume of solution = 0.0248 L x 1000 mL/L = 24.8 mL

For more question on volume click on

https://brainly.com/question/27100414

#SPJ11

Answer:

low density

Explanation:

Because hydrogen make a natural choice For one of it The 1st practical use

Hydrogen gas has lower density than air. This is why it is used to fill balloons.

Hydrogen is the lightest element found in nature. It has a density of 0.08988 g/L under normal conditions. This leads to hydrogen gas being lighter than any other gas in similar volume. Thus balloons filled with hydrogen gas rise much better than balloons filled with other gases like helium.

However, hydrogen is far less commonly used to fill balloons. The reason being that hydrogen is a highly flammable gas. Whereas gasses like helium which are noble gasses are much safer to use.

To learn more about Density,

https://brainly.com/question/1354972

Answer:

Natural BGH and rBGH both increase the level of another hormone called insulin-like growth factor (IGF-1) in the cow.

Beef cattle are often given steroids to increase and speed growth. Common steroids include:

Major groups such as FDA and Food and Agricultural Organization state track level of hormones in food. They state that the levels of hormones in food are safe to eat. Not everyone agrees.

Explanation:

Hormones are present in all animal products. Some are natural, others may be added through supplements. Hormones and steroids are given to livestock. It can increase the number of dairy products and beef.

FDA establishes the acceptable safe limits for hormones in meat. A safe level for human consumption is a level of drug in the meat that would be expected to have no harmful effect in humans based on extensive scientific study and review.  

Explanation:

The stovetop example would be an open system, because heat and water vapor can be lost to the air. A closed system, on the other hand, can exchange only energy with its surroundings, not matter.

Answer:

By Boiling Them soo water can evaporate and separates from salt.

Answer:

0.028578 km

Explanation:

The following data were obtained from the question:

Length of whale (in mm) = 28578 mm

Length of whale (in km) =?

We can convert 28578 mm to km by doing the following:

Recall:

1 mm = 1×10¯⁶ Km

Therefore,

28578 mm = 28578 mm × 1×10¯⁶ Km / 1 mm

28578 mm = 0.028578 km

Thus, 28578 mm is equivalent to 0.028578 km

The length of whale (in km) = 0.028578 km

Moving a gas to a smaller container and holding the container over a Bunsen burner are two modifications that might raise a gas's pressure.

Gas pressure rises as container volume decreases. As a gas's temperature rises inside a rigid container, pressure also rises. The temperature, volume, and particle count of an enclosed gas are all variables that determine its pressure.

We can modify the pressure in two ways. First, we can make the air denser by either decreasing the volume of the container or adding additional air molecules to it.

To know more about pressure visit:-

https://brainly.com/question/9099789

#SPJ1

Answer: look at the explanation and try to work it

Explanation: in contrast, our atmosphere blocks most ultraviolet light (UV) and all X-rays and gamma-rays from reaching the surface of Earth. Because of this, astronomers can only study these kinds of light using detectors mounted on weather balloons, in rockets, or in Earth-orbiting satellites.

The rate of disappearance of Br- is 5 times  of the rate of disappearance of BrO₃⁻. Hence, the disappearance rate of Br- in the reaction is 0.201 M/s .

The rate of a reaction is the rate of disappearance of the reactants or the rate of appearance of the products. The rate of a reaction is directly proportional to the molar concentration of the reactants.

For the given reaction, the rate of reaction can be written in the following terms.

-d/dt [BrO₃⁻] = -1/5 d/dt [Br-] =  -1/6d/dt [H+ ] = +1/3d/dt  [Br²] = + 1/3 d/dt[H₂O]

The minus sign indicates the disappearance and + indicates the formation.

Given, the rate of disappearance of BrO₃⁻ = -d/dt [BrO₃⁻]  = 0.041 M/s.

-d/dt [BrO₃⁻]  = 1/5 d/dt [Br-]

then  d/dt [Br-] = 5 -d/dt [BrO₃⁻]  = 5 × 0.041 M/s = 0.201 M/s.

Therefore, the rate of disappearance of Br- in this reaction is 0.201 M/s.

Find more on reaction rate :

https://brainly.com/question/29261432

#SPJ9

1 chromium atom

Explanation:

number of (Cr) atom =

\( \frac{mass \: of \: cr}{molar \: mass \: (amu)} \)

n = m/M

n = 52/52

n= 1g

Element w is less reactive than elements x, y, and z. The element with the lower atomic number is typically less reactive.

Element w has an atomic number of 9, element x has an atomic number of 10, element y has an atomic number of 11, and element z has an atomic number of 12. Based on this information, we can conclude that element w is less reactive than elements x, y, and z.

This is because the reactivity of an element is largely determined by the number of valence electrons it has. Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical reactions. Elements with fewer valence electrons are less reactive because they are more stable. Element w has only one valence electron, while elements x, y, and z have two, three, and four valence electrons, respectively.

In general, elements with a full outermost shell of electrons, such as the noble gases, are the least reactive because they are highly stable. Elements that are close to having a full outermost shell, such as element w, are also relatively stable and less reactive. On the other hand, elements with only a few valence electrons, such as the alkali metals, are highly reactive because they are trying to gain or lose electrons in order to achieve a full outermost shell.

Overall, the reactivity of an element is determined by its electronic structure, with elements having fewer valence electrons generally being less reactive than those with more. In the case of the elements w, x, y, and z, we can see that element w has the fewest valence electrons and is therefore the least reactive.

For more such questions on Element

https://brainly.com/question/28376204

#SPJ11

5.66%

The formula for calculating the percent mass/volume of a solution is expressed as:

Given the following parameters

Mass of solute = 30000mg = 30g

Mass of solvent = 0.5litres = 500g

Mass of solution = 30g + 500g = 530g

Substitute the parameters into the formula

Hence the percent mass/volume of a solution is 5.66%

Answer:

a book sitting on a desk (D)

Explanation:

this is true because all of the other objects are representing mostly potential to kinetic energy but the book is only potential energy

___________________________________________________________hope this helps pls make me brainliest :p

Filtration is the process of passing a liquid containing contaminants through a filter to get a cleaner liquid.

After filtration impurities are left on the filter when the liquid goes through it, resulting in a cleaner combination. The procedure of separating one ingredient from another in a compound is used in the purification of chemical compounds or any materials. A mixed sample is turned into fresh samples, each of which contains a single ingredient.Separation procedures are then utilised to separate these compounds. These techniques alter the relative proportions of components in a combination.The type of the compounds and the impurities in them influence the purification of organic chemicals and compounds.

Purification of compounds can be done in other methods as well such as distillation, chromatography, sublimation and crystallisation.

Learn more about filtration here:

https://brainly.com/question/31504556

#SPJ1

Full question:

What can you conclude after learning about filtration of solutions of organic compounds? Name other methods of purification of compounds.

Answer:

Earlier today, my friend got a call from the company where she had recently applied for a job. They informed her that she had been selected for an interview, which was scheduled for later this week. She was overjoyed and relieved to hear the news, as she had been searching for a job for several months and this was one of the positions she was most excited about. The call was definitely the highlight of her day, and it put her in a great mood for the rest of the afternoon! :) She immediately called her parents and friends to share the good news and celebrate!!

When the equilibrium constant is higher than one, it indicates that the reaction prefers to produce products, whereas if the equilibrium constant is less than one, it indicates that the reaction prefers to produce reactants. If the equilibrium constant is equal to one, the reaction proceeds in both directions equally.

In a chemical reaction, exothermic reactions are defined as reactions that release heat into their environment. It implies that heat is given off when reactants are converted to products. At equilibrium, an exothermic reaction continues to be exothermic, meaning that heat is given off even after the reaction reaches a state of equilibrium.There are two types of reactions: exothermic and endothermic.

A reaction is classified as exothermic if it releases heat, and endothermic if it absorbs heat. The direction of the reaction is determined by whether it is exothermic or endothermic. At equilibrium, the reaction is no longer moving forwards or backwards. It's also worth noting that reactions can be exothermic in one direction and endothermic in the other.

The equilibrium constant (K) is defined as the ratio of the concentration of products to the concentration of reactants in the chemical reaction equation. It is used to express how much of the products is generated by the reaction in comparison to the reactants.  the equilibrium constant aids in the identification of the direction in which the reaction will proceed at equilibrium.

for more questions on equilibrium

https://brainly.com/question/3159758

#SPJ8

Answer:

See explanation

Explanation:

When the complex ion Co(H2O)6 2+(aq) is placed in solution and chloride ions are added, the following equilobrium is set up;

  Co(H2O)62+(aq) + 4 Cl-(aq) <=> CoCl42-(aq) + 6 H2O(g)

Co(H2O)6 2+(aq) solution  is pink in colour while CoCl42-(aq) solution is blue in colour.

Since the solubility of CoCl42-(aq) is endothermic, heating the solution will move the equilibrium position towards the right (more CoCl42-(aq) is formed and the solution is blue in colour).

When the solution is cooled, more Co(H2O)62+(aq) is formed and the equilibrium position shifts towards the left and the solution becomes pink in colour.

When the solution is cooled, more \(Co(H_2O)_6^{2+}\) (aq) is formed and the equilibrium position shifts towards the left and the solution becomes pink in color.

When the complex ion \(Co(H_2O)_6^{2+}\) (aq) is placed in solution and \(CoCl_4^{2-}\) are added, the following equilibrium is set up;

\(Co(H_2O)_6^{2+}(aq) + 4 Cl^-(aq) < = > CoCl_4^{2-}(aq) + 6 H_2O(g)\)

\(Co(H_2O)_6^{2+}\) (aq) solution  is pink in color while \(CoCl_4^{2-}\)(aq) solution is blue in color. Since the solubility of \(CoCl_4^{2-}\)(aq) is endothermic, heating the solution will move the equilibrium position towards the right (more \(CoCl_4^{2-}\) (aq) is formed and the solution is blue in color). When the solution is cooled, more  \(Co(H_2O)_6^{2+}\) (aq) is formed and the equilibrium position shifts towards the left and the solution becomes pink in color.

Find  more information about Equilibrium here:

brainly.com/question/517289

Answer: if they use solar collection panels

Explanation:

Answer:

A

Explanation:

it has a methyl group, ethyl group and amine group

The correct IUPAC name for the structure shown in the provided image is "ethylamine." The structure consists of a central nitrogen atom bonded to two carbon atoms.

The correct IUPAC name for the structure shown in the provided image is "ethylamine." The structure consists of a central nitrogen atom bonded to two carbon atoms. According to the IUPAC naming rules, the longest carbon chain is selected as the parent chain, which in this case consists of two carbon atoms. The substituent attached to the parent chain is an ethyl group, denoted as "C2H5". The amine functional group, which consists of the nitrogen atom, is named as "amine". Since there is only one amine group attached to the carbon chain, it is referred to as "ethylamine." Therefore, option C) "ethylamine" is the correct IUPAC name for the given structure.
For more question on IUPAC

https://brainly.com/question/28872356

#SPJ11

Answer:

H

Explanation:

False, if a pill is tested with formaldehyde and sulfuric acid and turns the solution orange, it does not necessarily mean that ecstasy was present.

While ecstasy does produce this reaction, other substances can as well. Formaldehyde and sulfuric acid are reagents used in the “Marquis test” to identify the presence of certain alkaloids. When these two chemicals are mixed together, a reaction will occur with certain compounds to produce an orange solution.

This reaction can occur with other substances like codeine, heroin, and even caffeine. Therefore, the orange solution is not a definitive indicator of the presence of ecstasy.

To identify the exact substance, a sample of the pill must be tested using a more advanced method such as a gas chromatography–mass spectrometry or high performance liquid chromatography (HPLC). These methods can accurately identify the exact components of the pill. while the Marquis test can be used as a preliminary test to identify the presence of certain compounds, it cannot definitively determine if ecstasy was present.

Learn more about pill test here:

https://brainly.com/question/25670641

#SPJ1