I need help with question two. Balancing and solving for it.

Answer:

The final temperature of the copper would be 311.3°C.

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Answer:

N2O5

Explanation:

1. Convert to moles

24.5g N * 1mol/14g = 1.75

70.0g * 1mol/16g = 4.375

2. Divide each value by the smallest

1.75/1.75 = 1

4.375/1.75 = 2.5

3. Multiply each by a whole number so that they are both whole numbers

1*2 = 2

2.5*2 = 5

4. These are moles of elements present in the compound

Answer: N2O5

Question: You decompose a compound containing nitrogen and oxygen in the laboratory and produce 24.5 g of nitrogen and 70.0 g of oxygen. Calculate the empirical formula of the compound.

1) He was born on February 8, 1834

2) He was born in Tobolsk, Russia

3) Mendeleev arranged the elements in order of increasing relative atomic mass.

4) Gallium, germanium, and scandium

5) He died on February 2, 1907

6) Protons (positive charge) and neutrons (neutral charge)

Answer:

A

Explanation:

Two specialized cells called 'guard cells' make up each stoma (stoma is singular for stomata). Plants have many stomata up to 400 per mm2 on their leaf surfaces and they are usually on the lower surface to minimize water loss.

Answer:

A. elements

I hope it's helps you

Answer:

A i think

Explanation:

Given the initial volume, temperature and pressure of the gas, at Standard conditions for temperature and pressure, the new volume will be 310mL.

Combined gas law put together both Boyle's Law, Charles's Law, and Gay-Lussac's Law. It states that "the ratio of the product of volume and pressure and the absolute temperature of a gas is equal to a constant.

It is expressed as;

P₁V₁/T₁ = P₂V₂/T₂

Given the data in the question;

At Standard conditions for temperature and pressure

To calculate the new volume the gas, we substitute our given values into the expression above.

P₁V₁/T₁ = P₂V₂/T₂

P₁V₁T₂ = P₂V₂T₁

V₂ = P₁V₁T₂ / P₂T₁

V₂ = ( 0.690846atm × 0.5L × 273.15K )  / ( 1.0atm × 303.15K )

V₂ = 94.3522925LatmK / 303.15atmK

V₂ = 0.31L

V₂ = 310mL

Given the initial volume, temperature and pressure of the gas, at Standard conditions for temperature and pressure, the new volume will be 310mL.

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The answer is B. The number of atoms in the reactants

When the products of a reaction are known, the fact that can always be deduced about the reactants is the number of atoms in the reactants and the correct option is option B.

The Law of Conservation of Matter says that the amount of matter stays the same, even when matter changes form.

When matter changes drastically it is not actually destroyed. This can be tested by weighing all the materials involved in an experiment before starting it, and again after the experiment. Comparing the weights proves that there is still the same amount of matter. It simply changes form.

Therefore, When the products of a reaction are known, the fact that can always be deduced about the reactants is the number of atoms in the reactants and the correct option is option B.

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1. The pressure increases when the volume decreases

2. A solid has a fixed volume and is not compressible

3. The volume of 1 mol of an ideal gas is 22.4 L

4. Solid molecules do not move. (Option A)

5. Temperature and volume have a direct relationship

6. Pressure and volume have an indirect relationship

7. The equation to be used is option C

8. The equation to be used is option B

Gas laws serve as a foundation for comprehending gas behavior and have a variety of uses, including industrial operations, gas storage, and the investigation of atmospheric phenomena.

It's vital to keep in mind that these gas laws are based on the assumption that gases behave in an ideal way and consist of infinitely small particles that do not interact with one another. Under specific circumstances, the behavior of actual gases may differ from these idealized connections.

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Answer: 0.1334983576 g

Explanation:

The mass must be conserved on both sides of the equation. Mass put in must must = mass put out. So we must start by finding the mass of the reactants and then the mass of 2H2O. Then we must subtractio the mass of the reactants from the mass of 2H2O which will gives us the mass of CO2.

Mass of CH4:

(12.0107)+ 4(1.00794) = 16.48246 g/mol

we are given three mols of CH4 so divide 3 mol by 16.48246 g/mol

3 mol/ 16.48246 g/mol = 0.1820116657 g CH4

Mass of 2O2:

2(15.99994) = 31.99988 g/mol

we are given 2 moles of 2O2 so divide 2 mol by 31.99988 g/mol  

2 mol/ 31.99988 g/mol = 0.0625002344 g 2O2

Mass of 2H2O:

2(1.00794)+(15.99994) = 18.01582 g/mol

we are given 2 moles of 2H2O so divide 2 mol by 18.01582 g/mol

2 mol/ 18.01582 g/mol = 0.1110135425 g 2H20

Now we add up the grams on the reactatnt side and subtract that number from the mass of 2H2O:

0.1820116657 g CH4 + 0.0625002344 g 2O2 = 0.2445119001 g (total of g of reactants)

0.2445119001 g -  0.1110135425 g =  0.1334983576 g CO2

Answer:

D

Explanation:

H2O + H20 = H30+ + OH-

The correct option C. 25.0%. The percentage by mass of cesium Cs in the sample is found as 25%.

Mass percent = mass of solute/ mass of solution

mass percent = mass of solute/ mass of solution * 100 %

mass percent = 100/ 400 *100%

mass percent = 25%

Thus,  the percentage by mass of cesium Cs in the sample is found as 25%.

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The ranking of boiling point is based on the molecular weight and intermolecular forces between molecules.

2 central carbons, each with CH3 bonded to them. A central C has H bonded left, above, behind to the right, and in front to the right. A carbon chain with 5 central carbons, with CH3 bonded to the first, second, and last carbons in the chain. 2 central carbons with CH3 bonded to the outside, and CH3 bonded to the leftmost inside carbon.

In this case, all compounds are hydrocarbons, meaning they are non-polar molecules and exhibit van der Waals forces. However, the length of the carbon chain and the arrangement of atoms in the molecule affect the magnitude of these forces.

The first compound has only two carbons and exhibits weak intermolecular forces, so it has the lowest boiling point. The second compound has three carbons and a more complex arrangement of atoms, resulting in slightly stronger van der Waals forces and a higher boiling point.

The third compound has a longer carbon chain, which increases the molecular weight and results in stronger intermolecular forces, giving it a higher boiling point than the previous two. The fourth compound has the longest carbon chain and has multiple branches, which increases the surface area of the molecule and the strength of the intermolecular forces, giving it the highest boiling point.

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Answer:

The answers are 4, 2, 3, 1

Explanation:

Atom consists of electron, proton and neutron.  The number of proton and electrons is 25. The number of neutron is 30. The given element is manganese, Mn.

Atom is the smallest particle of any matter. Atom combines to form element and element combine to form molecule or compound.

Mass number =Number of neutrons+ number of protons

Mass number =55

Number of neutrons=atomic number+5

Substituting the given values in the above formula

55 =atomic number+5+ number of protons

50=2×atomic number

Atomic number=25

Therefore, the number of proton and electrons is 25. The number of neutron is 30. The given element is manganese, Mn.

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The ranking of acids from weakest to strongest would be: (A) HIO₂ < HBrO₂ < HFO₂ < HClO₂, (B) HIO = HIO₂ < HIO₃ = HIO₄, and (C) HF < HCl < HBr < HI.

Ranking the given acids from weakest to strongest would be done by analyzing their acidity constants. The higher the acidity constant, the stronger the acid.

a. HFO₂, HClO₂, HBrO₂, HIO₂
The acidity constants for the given acids are:
HFO₂ = 2.2 x 10⁻⁷
HClO₂ = 1.1 x 10⁻²
HBrO₂ = 2.3 x 10⁻⁹
HIO₂ = 2.3 x 10⁻¹¹

Therefore, the ranking of these acids from weakest to strongest would be:
HIO₂ < HBrO₂ < HFO₂ < HClO₂

b. HIO, HIO₂, HIO₃, HIO₄
The acidity constants for the given acids are:
HIO = 2.3 x 10⁻¹¹
HIO₂ = 2.3 x 10⁻¹¹
HIO₃ = 1.6 x 10⁻¹
HIO₄ = 1.6 x 10⁻¹

Therefore, the ranking of these acids from weakest to strongest would be:
HIO = HIO₂ < HIO₃ = HIO₄

c. HF, HCl, HBr, HI
The acidity constants for the given acids are:
HF = 7.2 x 10⁻⁴
HCl = 1.0 x 10⁶
HBr = 1.0 x 10⁹
HI = 1.0 x 10¹⁰

Therefore, the ranking of these acids from weakest to strongest would be:
HF < HCl < HBr < HI

In conclusion, the ranking of the given acids from weakest to strongest are:
a. HIO₂ < HBrO₂ < HFO₂ < HClO₂
b. HIO = HIO₂ < HIO₃ = HIO₄
c. HF < HCl < HBr < HI

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Answer:

In paper chromatography, the wet moving edge of the solvent that progresses along the surface where the separation of the mixture is occurring.

Explanation:

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Answer:

5.99 moles of \(UF_6\)

Explanation:

In this case, we can start with the decomposition of \(UF_6\), so:

\(UF_6~->~U~+~3F_2\) (Reaction 1)

The \(F_2\) can react with carbon to produce \(CF_4\):

\(CF_4~+~2F_2~->~CF_4\) (Reaction 2)

If we 8.99 mol of \(CF_4\), we can calculate the moles of \(F_2\) that we need. In reaction 2 we have a molar ratio of 1:2 (2 moles of \(F_2\) will produce 1 mol of \(CF_4\)):

\(8.99~mol~CF_4\frac{2~mol~F_2}{1~mol~CF_4}~=~17.98~mol~F_2\)

With this value and using the molar ratio in reaction 1 (3 moles of \(F_2\) are producing by each mol of \(UF_6\)), so:

\(17.98~mol~F_2\frac{1~mol~UF_6}{3~mol~F_2}~=~5.99~mol~UF_6\)

So, we will need 5.99 moles of \(UF_6\) to produce 8.99 mol of \(CF_4\).

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3 moles of I2 will be formed from 3 moles of chrlorine gas.

Explanation:

This is because, when you balance the given equation it allows for the mole ratio between the two given elements to be 1:1 so therefore 3 moles of chlorine gas will produce 3 moles of I2.

Answer:

Mass=Moles × RFM

Mass= 0.28M× 164

Mass= 45.92 grammes

Answer:

D. AgCl and KNO₃

Explanation:

anions switch from the original reaction.

Answer:D

Explanation:

If a reaction has a negative ΔG and a positive ΔS, the reaction will be spontaneous at all temperatures.

If a reaction is spontaneous at all temperatures, it implies that the reaction will occur without the need for any external intervention, such as the addition of energy. For a reaction to be spontaneous, it must satisfy the criteria of thermodynamic favorability, which is determined by the change in Gibbs free energy (ΔG) associated with the reaction.

The relationship between ΔG, temperature (T), and the equilibrium constant (K) of a reaction is described by the equation ΔG = ΔH - TΔS, where ΔH is the change in enthalpy and ΔS is the change in entropy.

To ensure spontaneity at all temperatures, two conditions must be met:

ΔG must be negative: A negative ΔG indicates a thermodynamically favorable reaction, meaning the products have a lower Gibbs free energy than the reactants. If ΔG is negative, the reaction will proceed spontaneously in the forward direction.

ΔS must be positive: A positive ΔS signifies an increase in the overall entropy of the system. Higher entropy means more disorder, and spontaneous reactions often involve an increase in randomness. When ΔS is positive, it can compensate for the enthalpic term, ΔH, allowing the reaction to proceed spontaneously.

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0.04 grams of zinc reacted

The Ideal gas law is the equation of state of a hypothetical ideal gas. It is a good approximation to the behaviour of many gases under many conditions, although it has several limitations. The ideal gas equation can be written as

                            PV = nRT

where,

P = Pressure

V = Volume

T = Temperature

n = number of moles

Given,

Volume = 670 ml = 0.67L

Pressure = 576 torr

Temperature = 25 degree celsius

PV = nRT

576 × 0.67 = n × 62.36 × 298

n = 0.02 moles

mass = moles × molar mass

= 0.02 × 2 = 0.04g

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Answer:

It's a Ionic compound

Explanation:

To tell if CaO (Calcium oxide) is ionic or covalent (also called molecular) we look at the Periodic Table that and see that Ca is a metal and O is a non-metal. When we have a metal and a non-metal the compound is usually considered ionic.

Because we have a metal and non-metal in CaO there will be a difference in electronegativity between the metal and non-metal. This difference results in an electron(s) being transferred from the metal (lower electronegativity) to the non-metal (higher electronegativity). The results in the metal becoming a postitive ion and the non-metal a negative ion. The two opposite charges are attracted and form the ionic bond between atoms in Calcium oxide.

Answer:

55.0125 grams NO2

Explanation:

So we have 80 grams of O2, first convert to moles

80 g O2 * 1 mol/32 g O2 = 2.5 mol O2

Next use the mole ratio of O2 to NO2

2.5 mol O2* 1 mol NO2/2 mol NO2=1.25 mol NO2

Since the question is asking how many grams, convert NO2 to grams

1.25 mol NO2 * 44.01 NO2/1 mol NO2= 55.0125 grams

Answer:

1 mol

Explanation:

They all have 1 mol with Fe containing 1 mol Cu containing 1 mol and N containing 1 mole

The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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When glucose molecules are added to chains of glycogen for storage, the process is known as glycogenesis.

The liver and the Cori cycle's resting phases both trigger this process, and insulin's response to high blood glucose levels also triggers it. Blood glucose levels increase after eating because glucose enters the liver. The liver uses glycogenesis to deal with this extra glucose by converting it to glycogen for storage. Glycolysis is the process by which the glucose that is not stored is converted into energy. Each cell in the body experiences this. The first step in the multi-step process of glycogenesis, also known as glycogen synthesis, is the conversion of glucose to glucose-6-phosphate by hexokinase or the liver isoform of hexokinase, known as glucokinase.

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The volume of oxygen gas produced by the decomposition of 3.05 g KCIO₃ according to the given equation is 1.68 liters

Let us begin by obtaining the mole of 3.05 g of KClO₃. Details below:

Mole = mass / molar mass

Mole of KClO₃ = 3.05 / 122.5

Mole of KClO₃ = 0.025 mole

Next, we shall determine the mole of of oxygen gas, O₂ produced from the reaction. Details below:

KClO₃ -> 2KCl + 3O₂

From the balanced equation above,

1 mole of KClO₃ reacted to produced 3 moles of O₂

Therefore,

0.025 mole of KClO₃ will react to produce = 0.025 × 3 = 0.075 mole of O₂

Finally, we shall obtain the volume of oxygen gas, O₂ produced. This is shown below

At STP,

1 mole of O₂ = 22.4 Liters

Therefore,

0.075 moles of O₂ = 0.075 × 22.4

0.075 moles of O₂ = 1.68 liters

Thus, the volume of oxygen gas, O₂ produced is 1.68 liters

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The formula you provided calculates the percent change in pH based on the difference between the pH at 5 drops and the pH at 0 drops. Here's how you can use the formula:

1. Determine the pH at 5 drops and the pH at 0 drops.

Let's say the pH at 5 drops is 4 and the pH at 0 drops is 7.

2. Plug the values into the formula:

Percent Change of pH = 100% × (pH at 5 drops - pH at 0 drops) / pH at 0 drops

Percent Change of pH = 100% × (4 - 7) / 7

3. Calculate the numerator:

4 - 7 = -3

4. Calculate the denominator:

Percent Change of pH = 100% × (-3) / 7

5. Calculate the percent change:

Percent Change of pH = -300% / 7

Therefore, the percent change in pH from 0 drops to 5 drops is approximately -42.86%.

Answer:

gene

Explanation:

DNA is divided into functional units called genes. A gene is a segment of DNA that codes for a functional product (mRNA, tRNA, or rRNA). Since the vast majority of genes are transcribed into mRNA and mRNA is subsequently translated into polypeptides or proteins, most genes code for protein synthesis

Answer:

coding for protein are called exons, and the noncoding regions separating the exons are called introns. Following transcription, these coding sequences must be joined together before the mRNAs can function. The process of removal of the introns and subsequent rejoining of the exons is called RNA splicing.

Explanation:

Answer: they are Positively charged