PLEASE HELP!!! Do you think the number of animals that eats plants is related to the number of plants?

Answer:

Explanation:

The Law of Multiple Proportions states that when two elements form more than one compound, the masses of one element that combine with a fixed mass of the other element are in ratios of small whole numbers.

In this case, the two compounds formed are likely to be HgCl and HgCl2, and the ratios of mercury to chlorine in these compounds are 1:1 and 1:2, respectively. The fact that either 28.3g or 56.6g of mercury is consumed in the reaction suggests that the mass of chlorine is constant, and the mercury is being consumed in fixed ratios to form different compounds.

If the first product is HgCl, then 1 mole of mercury (200.59g) will react with 1 mole of chlorine (70.90g) to form 271.49g of HgCl. Therefore, 10g of chlorine would require 28.3g of mercury to form 38.7g of HgCl.

If the second product is HgCl2, then 1 mole of mercury (200.59g) will react with 2 moles of chlorine (2 × 70.90g) to form 472.39g of HgCl2. Therefore, 10g of chlorine would require 56.6g of mercury to form 94.5g of HgCl2.

Thus, the Law of Multiple Proportions can explain the observations that either 28.3g or 56.6g of mercury is consumed in the reaction, and no other combinations occur, as the two different ratios of mercury to chlorine in the products are in small whole number ratios of 1:1 and 1:2.

The quantum numbers show the position of the electrons.

The question has unclear options hence I would discuss the quantum numbers generally.

In quantum mechanics, the allowed quantum numbers depend on the physical system under consideration. However, in the case of an electron in an atom, the allowed quantum numbers are:

Principal quantum number (n): determines the overall energy and distance from the nucleus, where n = 1, 2, 3, and so on.

Azimuthal quantum number (l): determines the angular momentum and the shape of the orbital, where l can range from 0 to (n-1).

Magnetic quantum number (m): determines the orientation of the orbital in space, where m can range from -l to l.

Spin quantum number (s): determines the intrinsic angular momentum of the electron, where s = ±1/2.

The combination of these quantum numbers completely specifies an electron's state in an atom.

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Molar concentration of Zn2+ions in a solution is 3.481 mol/lit

The electrode potential value is 59mV

Temperature=298k

What is electrode potential?

equation formed- Zn → Zn2+ + 2e

              from Nernst equation-

E=E cell - 0.059 log [Zn2+]

[zn2+]=3.481 mol/lit

hence, Molar concentration of Zn2+ions in a solution is 3.481 mol/lit

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There are 6 atoms of oxygen on the reactant side of the following equation: 2Fe2O3 + 3C → 4Fe + 3CO2. Details about atoms can be found below.

The number of atoms of an element in a balanced equation is the amount of that element involved in the reaction.

According to this question, Iron oxide reacts with carbon to produce iron and carbon dioxide as follows:

2Fe2O3 + 3C → 4Fe + 3CO2

In this reaction, 2 × 3 atoms = 6 atoms of oxygen are present on the reactant side of the equation.

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A pH of 4 is ten times more acidic than a pH of 5.

Yes, pH can have decimal values. In fact, pH values can range from 0 to 14 and can have any value between them including decimals. pH is a measure of the acidity or alkalinity of a solution, and it is determined by the concentration of hydrogen ions (H+) in the solution.A solution with a pH of 7 is neutral, which means that it has an equal concentration of hydrogen ions (H+) and hydroxide ions (OH-). An acidic solution has a pH below 7 and a high concentration of H+ ions. On the other hand, an alkaline solution has a pH above 7 and a low concentration of H+ ions.A pH that is less than 7.0 indicates acidity. pH less than 7.0 is acidic while pH greater than 7.0 is alkaline. Each number on the pH scale represents a ten-fold change in the acidity/alkalinity of the solution. For example, a pH of 5 is 10 times more acidic than a pH of 6, and 100 times more acidic than a pH of 7.A pH of 0 indicates a very strong acidic solution while a pH of 14 indicates a very strong alkaline solution. It's worth noting that pH is a logarithmic scale, meaning that a change of one pH unit corresponds to a ten-fold change in hydrogen ion concentration.

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Answer:

do you have to do the first part to?

Explanation:

you know

14 mole  of Fe will react with 9.3 mole of oxygen and produce 4.2mole of Fe\(_3\)O\(_4\). The mole signifies  6.022×10²³ units, which is a very big quantity.

In chemistry, a mole, sometimes spelt mol, is a common scientific measurement unit for significant amounts of extremely small objects like atoms, molecules, and other predetermined particles. The mole signifies  6.022×10²³ units, which is a very big quantity.

Under the International System of Units (SI), the mole is defined as this quantity as of May 20, 2019, according the General Conference upon Weights and Measurements. The amount of atoms discovered via experimentation to be present in 12 kilograms of carbon-12 was originally used to define the mole. 

3 Fe + 2 O\(_2\)→ Fe\(_3\)O\(_4\)

The ratio among Fe, oxygen and Fe\(_3\)O\(_4\) is 3:2:1

1 mole of Fe reacts with 2/3mole of oxygen

14 mole of Fe reacts with (2/3)×14=9.3 mole of oxygen

1 mole of Fe reacts with 1/3mole of Fe\(_3\)O\(_4\)

14 mole  of Fe reacts with (1/3)×14=4.2mole of Fe\(_3\)O\(_4\)

Therefore, 14 mole  of Fe will react with 9.3 mole of oxygen and produce 4.2mole of Fe\(_3\)O\(_4\).

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Answer:

Throughout the clarification section, the description of the situation is summarized.

Explanation:

Plant species mostly with such as photosynthesis have been providing us with just the very first food processing commodity.

Based on how chemical equations are written, the given chemical reaction: Four atoms of aluminum metal react quickly with 3 molecules of oxygen in the air to produce 2 molecules of aluminum oxide can be written as follows:

Word equation: Aluminum metal + oxygen gas ---> Aluminum oxide

Reactants: Aluminum metal and oxygen gas

Products: Aluminum oxide

Known states of matter: solid + gas ---> solid

Equation: 4 Al (s) + 3 O₂ (g) ---> 2 Al₂O₃ (s)

A chemical reaction is a type of change that results in changes in the chemical properties of substances.

Chemical reactions involve the rearrangement of atoms of substances and result in the formation of new substances.

Chemical reactions can be represented by a chemical equation.

Chemical equations use symbols to represent the reactants and the products of a reaction.

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Answer:

MgCO 3 is an inorganic salt with chemical name Magnesium Carbonate. It is also called Magnesite or Hydromagnesite or Barringtonite. Hydrated forms of magnesite such as di, tri, tetrahydrates are present as minerals. It acts as a fertilizer and as an antacid.

Answer:

See explanation

Explanation:

A saturated solution is a solution that contains just as much solute as it can normally hold at that temperature.

If the temperature is cooled and  crystals of copper sulphate are formed in the solution, then the solution is no longer saturated because some solute are now leaving the solution.

b) percent by mass = mass of solute/mass of solution * 100

percent by mass = 20%

mass of solute = x g

mass of solution =  80 g​

20 = x/80 * 100

1600 = 100x

x = 1600/100

x = 16 g

Answer:

The strongest conductors are understood to be all metals. Their conductivity is dependent on their atoms' number of valence electrons. Such electrons are not tightly bound together and are free to pass. Metals have electrons like this in their atoms, which is why they conduct heat and electricity so well.

Answer:

The density of the liquid is \(808\ kg/m^3\).

Explanation:

It is given that,

The density of liquid is 0.808 g/cm³

We need to convert the density into kg/m³

We know that,

1 kg = 1000 g

And 1 m = 100 cm

So,

\(d=0.808\ \dfrac{g}{cm^3}\\\\=0.808 \dfrac{(1/1000)\ kg}{(1//100\ cm)^3}\\\\d=808\ kg/m^3\)

So, the density of the liquid is \(808\ kg/m^3\).

The density of the liquid nitrogen in Kg/m³ is 808 Kg/m³

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

Density (g/cm³) = 0.808 g/cm³

1 g/cm³ = 0.001 Kg/cm³

Therefore,

0.808 g/cm³ = 0.808 × 0.001

1 Kg/cm³ = 10⁶ Kg/m³

Therefore,

0.000808 Kg/cm³ = 0.000808 × 10⁶

Thus, 0.808 g/cm³ is equivalent to 808 Kg/m³

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Answer:

Power of a machine is defined as its rate of doing work. It is the rate of transfer of energy. SI unit of power is watt. The power of a machine is said to be one watt if it can work at the rate of one joule in one second.

Explanation:

Brainliest please?

The molar mass of X would be 63.55 g/mol and the chemical symbol of X would be Cu (copper).

From the equation of the reaction: F2+2XBr⟶Br2+2XF

The mole ratio of XBr to Br2 is 2:1

Mole of Br2 = mass/molar mass

                      = 0.7241/159.808

                       = 0.004531 mole

Mole of XBr = 2 x mole of Br2

                      = 2 x 0.004531

                        = 0.009062 mole

Molar mass of XBr = mass/mole

                            = 1.300/0.009062

                                 = 143.456 g/mol

Since the molar mass of Br is 79.904, the molar of X would be:

                             143.456 - 79.904

                                   = 63.55 g/mol

Hence, X would be Cu.

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Answer:

3.34 M

Explanation:

Step 1: Given data

Step 2: Calculate the moles of acetic acid

The molar mass of acetic acid is 60.05 g/mol.

100 g × 1 mol/60.05 g = 1.67 mol

Step 3: Calculate the molarity of acetic acid

The molarity is equal to the moles of solute divided by the liters of solution.

M = n/V

M = 1.67 mol/0.5000 L = 3.34 M

Answer: chemistry question??

Explanation:

Explanation:

The oxidation number of Ni is +4

To solve such this we must know the concept of chemical reaction. Therefore the correct option is option C that is the properties and identity of the reacting substances.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

A change in the properties and identity of the reacting substances means that a chemical reaction has occurred.

Therefore the correct option is option C.

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Therefore, the number of molecules of KCl is 1.5 × 10*23.

In chemistry, a mole is a unit used to measure the amount of a substance. It is defined as the amount of a substance that contains the same number of particles (atoms, molecules, ions, or other entities) as there are atoms in 12 grams of pure carbon-12. This number is known as Avogadro's number. The mole is often used to convert between the mass of a substance and the number of particles it contains, as well as for other calculations involving chemical reactions and stoichiometry.

Here,

To solve this problem, we need to use stoichiometry to relate the mass of potassium chlorate to the mass of KCl formed, the number of moles of KClO3 heated to the volume of O2 gas produced, and the number of molecules of KCl formed.

Mass of KCl formed:

The balanced chemical equation for the decomposition of potassium chlorate is:

2 KClO3(s) → 2 KCl(s) + 3 O2(g)

From the equation, we can see that 2 moles of KCl are produced for every 2 moles of KClO3. Therefore, we can use the molar mass of KClO3 to calculate the number of moles of KClO3:

molar mass of KClO3 = 39.0983 + 35.453 + 3*16.00 = 122.55 g/mol

number of moles of KClO3 = 30.625 g / 122.55 g/mol = 0.25 mol

Since the stoichiometric ratio of KClO3 to KCl is 2:2, the number of moles of KCl formed is also 0.25 mol. We can use the molar mass of KCl to convert this to a mass:

molar mass of KCl = 39.0983 + 35.453 = 74.5513 g/mol

mass of KCl formed = 0.25 mol x 74.5513 g/mol = 18.625 g

Therefore, the mass of KCl formed is 18.625 grams.

Number of moles of KClO3 heated:

We already calculated this in the first step: 0.25 moles.

Volume of O2 gas produced at NTP:

NTP stands for "normal temperature and pressure", which is defined as 0°C (273.15 K) and 1 atm (101.325 kPa) of pressure. At NTP, 1 mole of any gas occupies a volume of 22.4 L.

Therefore, at NTP, which is similar to STP, the volume of 3 moles of O2 gas produced in the reaction is:

V(O2) = n(O2) × 22.4 L/mol = 3 mol × 22.4 L/mol = 67.2 L

However, we only need to find the volume of 1 mole of O2 gas, which is one-third of the above volume:

V(O2) = 67.2 L / 3 = 22.4 L/mol

Therefore, the volume of O2 gas produced at NTP is 8.4 liters (22.4 liters/mol × 0.375 mol).

Calculate the number of molecules of KCl:

To calculate the number of molecules of KCl, we first need to convert the mass of KCl produced to the number of moles of KCl using its molar mass of 74.55 g/mol:

n(KCl) = mass(KCl) / M(KCl) = 18.625 g / 74.55 g/mol = 0.25 mol

Next, we can use Avogadro's number (6.022 × 10*23 molecules/mol) to convert the number of moles of KCl to the number of molecules:

N(KCl) = n(KCl) × N_A = 0.25 mol × 6.022 × 10*23 molecules/mol = 1.506 × 10*23 molecules

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The volume of hydrogen needed to react with 5.00 L of oxygen based on the mole ratio is 10.00 L.

The volume of hydrogen gas is needed to react with 5.00 L of oxygen is determined from the mole ratio of the reactants as shown in the equation of reaction below:

Equation of reaction:  2 H₂ + O₂ → 2 H₂O

Mole ratio of hydrogen to oxygen = 2 : 1

Moles of gases occupies equal volume

Therefore, Volume ratio of hydrogen to Oxygen = 2 : 1

Volume of hydrogen needed to react with 5.00 L of oxygen = 5.00 * 2

Volume of hydrogen needed to react with 5.00 L of oxygen = 10.00 L

In conclusion, the volume of hydrogen required is obtained from the mole ratio of hydrogen and oxygen in the reaction.

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The standard enthalpy change for the reaction 2A+B⇌2C+2D is  664 kJ/mol and The heat that is absorbed when 3.70 mol of A reacts is 2456.8  J

The heat changes that take place as reactants combine to generate a product are measured by the enthalpy of a reaction.

The following formula can be used to determine the enthalpy change of a reaction:

Hess's law states that

Enthalpy of reaction =  product's enthalpy - the reactant's enthalpy.

Considering the given reaction: 2A + B ⇌ 2C + 2D  

Enthalpy of reaction =  product's enthalpy - the reactant's enthalpy.

Enthalpy of reaction (ΔH°f) = (2 C + 2 D) - (2 * A + B)

Enthalpy of reaction  (ΔH°f)  = {[2(223) + 2(-523)] - [2(-245) + 2(-387)]}

Enthalpy of reaction  (ΔH°f)  = 664 kJ/mol

ΔH = q ÷ n

ΔH = molar enthalpy (heat) of solution

q = amount of energy (heat) released or absorbed

n = moles of solute

so. q = ΔH xn

q = ΔH xn

q = 664 kJ/mol x 3.70 mol

Q= 2456.8  J

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The answer is gas.

Explanation:

ur welcome

Answer:

the enthalpy of the second intermediate equation is halved and has its sign changed.

Explanation:

Let us take a look at the first and second intermediate reactions as well as the overall reaction equation for the process under review;

First reaction;

Ca (s) + CO₂ (g) + ½O₂ (g) → CaCO₃ (s) ΔH₁ = -812.8 kJ

Second reaction;

2Ca (s) + O₂ (g) → 2CaO (s) ΔH₂ = -1269 kJ

Hence the overall equation is now;

CaO (s) + CO₂ (g) → CaCO₃ (s) ΔH = ?

According to the Hess law of constant heat summation, the enthalpy of the overall reaction is supposed to be obtained as a sum of the enthalpy of both reactions but this will not give the enthalpy of the overall reaction in this case. The enthalpy of the overall reaction is rather obtained by halving the enthalpy of the second intermediate reaction and reversing its sign before taking the sum as shown below;

Enthalpy of Intermediate reaction 1 + ½(- Enthalpy of Intermediate reaction 2) = Enthalpy of Overall reaction

Answer:

A.

Explanation:

Did it on Edge.

Nucleophiles are electron-rich and are attracted to electrophiles which are electron-deficient in a chemical reaction forming new chemical bonds.

Nucleophilic and electrophilic are terms used in organic chemistry to describe the reactivity of atoms or molecules in chemical reactions. Nucleophiles are atoms or molecules that have a spare electron pair and are attracted to positively charged atoms or regions (electrophiles).

These electron-rich species tend to react with electron-deficient species, called electrophiles, which have a partial positive charge. In chemical reactions, nucleophiles are attracted to electrophiles, and the two react to form a new chemical bond. This process is known as nucleophilic substitution or nucleophilic addition.

For example, in the nucleophilic substitution reaction of a halide with a strong nucleophile like hydroxide, the nucleophile donates its electrons to form a new bond with the electrophile (halide) which gets replaced by the nucleophile.

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The correct question is:

What is nucleophilic and electrophilic?

The amount, in kJ, of heat needed to completely vaporize 50.0g of water at 100°C is 118.8 kJ.

The heat needed to completely vaporize 50.0g of water at 100°C can be calculated using the following formula:

q = m x Hv

where:

First, we need to convert 50.0g to moles by dividing by the molar mass of water which is approximately 18.015 g/mol3:

moles of water = 50.0 g / 18.015 g/mol moles of water = 2.776 mol

Thus:

q = (2.776 mol) x (40.65 kJ/mol) q = 112.8 kJ

In other words, 112.8 kJ of heat is needed to completely vaporize 50.0g of water at 100°C.

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Answer:

nm, dm, km, m

Explanation:

1 nanometer = 1e-12 (0.000000000001) kilometers

1 decimeter = 1e-4 (0.0001) kilometers

1 kilometer = 1 kilometer

Regardless of whether 'm' stands for mile or meter, it's still larger than all of these being approx. 1.61 and 1e-3 (0.001) kilometers respectively.

in the future, please provide the exact units.

Such as:

nanometers, decimeters, kilometers, meters

The correct formula for the compound that forms between aluminum (Al) and sulfur (S) is (d) Al₂S₃.

The correct option is E, none of the above.

The reaction between aluminum (Al) and sulfur (S) is an example of a chemical reaction known as a combination or synthesis reaction. In this reaction, aluminum and sulfur combine to form a

.

The chemical equation for the reaction is:

2Al + 3S → Al₂S₃

Aluminum has a 3+ charge (Al³⁺) and sulfur has a 2- charge (S²⁻). In order to balance the charges, two aluminum ions (Al³⁺) are needed to combine with three sulfur ions (S²⁻), resulting in the formula Al₂S.

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Orbital notation is a way of representing the electronic configuration of an atom, which describes the arrangement of electrons in its various energy levels or orbitals.

In this notation, each orbital is represented by a box or circle, and the electrons are represented by up or down arrows, which indicate their spin. The number and arrangement of boxes and arrows in the notation follow the rules of the Aufbau principle, the Pauli exclusion principle, and Hund's rule.

The Aufbau principle tells that electrons fill the least energy orbitals before filling higher energy orbitals. The first shell of an atom contains one s orbital, which can hold up to two electrons. The s orbital is represented by a single box or circle, and each electron is represented by an up or down arrow.

The electronic configuration for potassium (K) is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹. In orbital notation, this would be represented as 1s: up arrow, down arrow; 2s: up arrow, down arrow; 2p: up arrow, up arrow, up arrow; 3s: up arrow, down arrow; 3p: up arrow, up arrow, up arrow; 4s: up arrow.

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