The addition of which of the following will control a mineral's color?

-Trace elements

-Biologic secretions

-Pigment

-Water

Answer:

A. Exploring the relationship of the material in a rock sample and its

    hardness.

B. Measuring the temperatures at which two rock samples melt.

C. Describing the types of materials that make up one rock sample.

D. Comparing the sizes of the crystals in two rock samples.

The correct coefficients for the chemical reaction between hydrazine and hydrogen peroxide is 1, 2, 1, 4 (option B).

Coefficients in a chemical reaction are numbers placed in front of formulas to balance equations.

A chemical equation is balanced when the number of atoms of each element on both sides of the equation are the same.

According to this question, hydrazine reacts with hydrogen peroxide to form nitrogen gas and water as follows:

N₂H₄ + 2H₂O₂ → N₂ + 4H₂O

As observed in the above chemical equation, the correct coefficients for the chemical reaction from left to right is 1, 2, 1, 4.

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The final concentration of the iodide ion (I-) in the saturated solution of AgI is approximately 9.22 × 10^−9 M.

To determine the final concentration of the iodide ion (I-) in a saturated solution of AgI, we need to use the solubility product constant (Ksp) and the initial concentration of AgNO3.

Balanced equation for the dissociation of AgI in water is:AgI ↔ Ag+ + I-

The Ksp expression for AgI is:Ksp = [Ag+][I-]

Given that the Ksp of AgI is 8.5 × 10^−17, and assuming that AgI is the only source of Ag+ and I- ions, we can set up the following equation:

8.5 × 10^−17 = [Ag+][I-]

Since the AgNO3 solution is saturated with AgI, we can assume that Ag+ ions will reach equilibrium with I- ions, resulting in equal concentrations.

Let's assume the final concentration of I- is x M. Therefore, the concentration of Ag+ will also be x M.

Substituting values into the Ksp expression, we have: 8.5 × 10^−17 = (x)(x)

Simplifying the equation, we get: 8.5 × 10^−17 = x^2

Taking the square root of both sides, we find:

x = √(8.5 × 10^−17)

x ≈ 9.22 × 10^−9

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Answer:

Explanation:

3 N₂ (g)  + 2  O₃ (g)   →     6 NO (g)

Δ H(rxn ) = 90.37x 6 - ( 0 + 142.26 x 2 )

= 542.22  - 284.52

= 257.7 kJ

Δ S(rxn ) = 6 x 210.6 - ( 2 x 237.7 + 3 x 191.5 )

= 1263.6 - ( 475.4 + 574.5 )

= 213.7 J / K

Δ G = Δ H - T Δ S

= 257.7 - 350  x 213.7

= - 74537.3 kJ  .

Δ G / mole = - 74537.3 / 6 = - 12422.88 kJ / mol.

Answer:

Dependant

Explanation:

Depending on the kind of substance you have (since ur answer of what substances was vauge) you would want to look at the molecular structure of the substances.

Understanding intermolecular bonds are key here (research this)

For example, Bromine is found as Br2 and only exerts London dispersion forces as there is no difference in polarity. And because this force is weaker, it has a lower boiling point

Another example being something like Hydrochloric acid (HCl). This is where Hydrogen acts as the positive atom while chlorine is the negative atom. This creates a stronger force and thus, a higher boiling point than Br2

Finally, there is Something like H2O where the force in play is Hydrogen bonding as Nitrogen, Oxygen, Fluorine where the bonds are strongest due to the electronegativity is at the greatest difference between these and Hydrogen. and thus having a higher boiling point.

So depending on the substance's bond, that will help determine the boiling point. If they fall under the same group, go based on the greatest difference in electronegativity.

I don't know if this is what you're looking for but, hope this helps. :)

33g

explanation

n=mM

Where:

- n is the amount or number of moles

- m is the mass in grams

- M is the molar mass in grams/mole

n=0.75

Calculate molar mass by adding the atomic masses of all atoms in the molecule

M=12+16⋅2

=44

m=n⋅M

=0.75⋅44

=33g

Answer:

4.5 ×10^22)

Explanation:

no. of particles =no. of mole×avogadro's number of particles                                             no. of particles =0.75×6.02×10^23                                                                                                         no. of particles =4.5 ×10^22  

Answer:

First convert ethene into C2H5Br by adding HBr. Then add aqueous KOH to form C2H5OH. Oxidize it by dilute H2SO4 and K2Cr2O7 to form CH3COOH. Add SOCl2 to form CH3COCl and reduction with Pd-baso4 and xylene.

Explanation:

I hope this helps you! :D

Answer:

the first cause eye color is genetic

Answer:

Molecular Formulas for Compounds

Explanation:

There are 9.57 moles of sucrose in 8.7 L of a 1.1 M solution.

When a substance is dissolved in a solution, its concentration is usually expressed in moles per liter (M).

This is a measure of the number of moles of the solute per unit volume of the solution.

To calculate the number of moles of sucrose in 8.7 L of a 1.1 M solution, we can use the formula:

moles of solute = concentration x volume

where concentration is measured in moles per liter (M), and volume is measured in liters (L).

In this case, the concentration is 1.1 M and the volume is 8.7 L, so:

moles of sucrose = 1.1 M x 8.7 L

moles of sucrose = 9.57 moles

Therefore, there are 9.57 moles of sucrose in 8.7 L of a 1.1 M solution.

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Answer:

The two fish are of the same species because they can mate with each other. Also, the characteristics of the blind cave fish enable them to live in caves. Eyes need energy. So, developing bodies with no eyes allowed these fish to function more efficiently.

Explanation:

plato answer

Answer:

d. NH4+ and C2H3O2- ions

Explanation:

When ammonium acetate (NH4C2H3O2) is mixed with water, it dissociates into its ions. In this case, it dissociates into NH4+ (ammonium ion) and C2H3O2- (acetate ion). Therefore, the solution will contain NH4+ and C2H3O2- ions dissolved in water.

The solution contains NH4+ and C2H302 ions. Among the given options, the correct answer is option d. It forms a solution containing NH4+ and C2H302 ions that are fully dissolved in the water.

When a chemist mixes ammonium acetate into 500 mL of water, the ammonium acetate (NH4C2H3O2) dissolves and dissociates into its constituent ions. This results in the formation of NH4+ ions (ammonium ions) and C2H3O2- ions (acetate ions) in the solution. Ammonium acetate is a salt that readily dissolves in water, dissociating into NH4+ and C2H302 ions. The aqueous solution will contain NH4+ ions and C2H3O2- ions, which are formed due to the dissociation of ammonium acetate in water. These ions will be dispersed throughout the solution and will not sink to the bottom.

In conclusion, when ammonium acetate is mixed into water, it forms a solution containing NH4+ and C2H302 ions that are fully dissolved in the water.

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A total of 4 cycloalkane constitutional isomers (excluding stereoisomers) are there with molecular formula C₅H₁₀, hence, correct answer is c) 4.

To determine the number of cycloalkane constitutional isomers with the molecular formula C₅H₁₀, we need to consider different arrangements of carbon atoms in a cyclical structure. For a cycloalkane with n carbon atoms, the number of constitutional isomers is given by 2ⁿ⁻¹.

In this case, for C₅H₁₀, we have five carbon atoms, so the number of constitutional isomers would be 2⁵⁻¹ = 2⁴ = 16. However, we need to exclude stereoisomers from the count.

Cycloalkanes with five carbon atoms can have different arrangements as follows:

1. Cyclopentane

2. Methylcyclobutane

3. Dimethylcyclopropane

4. Ethylcyclopropane

Therefore, there are four constitutional isomers of cycloalkanes with the molecular formula C₅H₁₀.

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D. A sour liquid that forms gas bubblee when mixed with copper

Answer:

Option A) Exothermic Reaction

Explanation:

In exothermic reaction, the energy is released. The reactants are at high energy while the products are at low energy as shown in the graph.

Answer:

A.) Exothermic reaction

Explanation:

I got it correct on founders edtell

The Claisen condensation is a type of organic reaction that involves the coupling of two esters or one ester and one ketone in the presence of a strong base, resulting in the formation of a beta-ketoester.

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The Claisen condensation is a type of organic reaction that involves the coupling of two esters or one ester and one ketone in the presence of a strong base, resulting in the formation of a beta-ketoester.

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Answer:

Mass of CO₂ produced  = 5.72 g

Explanation:

Given data:

Mass of methane = 2.34 g

Mass of oxygen = 8.32 g

Mass of CO₂ produced = ?

Solution:

Chemical equation:

CH₄ + 2O₂    →      CO₂ + 2H₂O

Number of moles of methane:

Number of moles = mass/molar mass

Number of moles =  2.34 g/ 16 g/mol

Number of moles = 0.146 mol

Number of moles of oxygen:

Number of moles = mass/molar mass

Number of moles =  8.32 g/ 32 g/mol

Number of moles = 0.26 mol

Now we will compare the moles of carbon dioxide with oxygen and methane.

                         CH₄             :              CO₂

                           1                 :              1

                        0.146            :           0.146

                         O₂                :               CO₂

                          2                 :                   1

                     0.26                :              1/2×0.26 = 0.13 mol

Less number of moles of CO₂ are produced by oxygen thus oxygen will react as limiting reactant.

Mass of CO₂:

Mass = number of moles × molar mass

Mass = 0.13 mol ×  44 g/mol

Mass = 5.72 g

Answer:

true, they both have different types of DNA.

Answer:

Um yes... they have different DNA's.. ;-;

Explanation:

The amount of warming that occurs when carbon dioxide doubles (relative to pre-industrial concentrations) is called climate sensitivity.

Climate sensitivity refers to the measure of how much the Earth's average temperature will increase in response to a doubling of carbon dioxide (CO2) concentrations in the atmosphere. It quantifies the relationship between the concentration of CO2 and the resulting global warming.

When carbon dioxide concentrations double compared to pre-industrial levels, climate sensitivity provides an estimate of the equilibrium temperature increase. It helps scientists understand the long-term impacts of increasing greenhouse gas concentrations on the Earth's climate system.

Climate sensitivity is typically expressed as the temperature change in degrees Celsius or Kelvin per doubling of CO2. It is influenced by various feedback mechanisms within the climate system, such as changes in clouds, water vapor, and ice-albedo feedback.

Understanding climate sensitivity is crucial for predicting and planning for future climate change. It assists in assessing the potential impacts of increasing greenhouse gas emissions and aids in the development of strategies to mitigate and adapt to global warming.

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Sodium carbonate (Na₂CO₃) is considered to be a basic salt because because it is the salt of a strong base and a weak acid. Therefore option E is correct i.e. "basic because it is the salt of a weak acid".

Sodium carbonate (Na₂CO₃) is the salt of a strong base (NaOH) and a weak acid (H₂CO₃). When it is dissolved in water, it undergoes hydrolysis, producing hydroxide ions (OH⁻) because of the reaction between the carbonate ion and the water molecule.

CO3²⁻  +  H2O ------->  HCO²⁻ + OH⁻

The hydroxide (OH⁻)  ions make up the solution basic, that  is why Na₂CO₃ is considered to be a basic salt.

Therefore, Sodium carbonate (Na₂CO₃) is considered to be a basic salt as it a salt of weak acid (H₂CO₃) and a strong base (NaOH).

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Answer:

Chemical Potential Ener

Answer:

it is very difficult to me I follow you plz follow me

Answer:

1. 2

2. 2

3. 1

4. 2

5. 3

6. The number of waves that pass a point in a second

7. How close the waves are to each other

Explanation:

also, check out this answer key if you need it:

https://rmsteam72.weebly.com/uploads/1/2/7/2/127288658/waves_worksheet_answer_key.pdf

stay safe out there.

If you forget to add primers to your PCR reaction, the reaction will not work because the primers are necessary for the DNA amplification process.

What are primers?

A primer is a brief sequence of nucleic acids that serve as the precursor to DNA synthesis. Short RNA strands make up primers in living things. Prior to DNA replication, an enzyme called primase, a subtype of RNA polymerase must create a primer.

Because Taq polymerase cannot add bases without an existing piece of DNA, your PCR reaction would fail if you forgot to add the primers. Because there wouldn't be an enzyme that could add additional nucleotide bases, your reaction would not succeed.

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The correct temperature that the enzyme works in kelvin is 310.1 K.

We know that temperature is defined as the degree of the hotness or the coldness of an object. Now we can see that we have the temperature of the object already given in the unit of the degrees Fareinheight and we need to put in the unit of kelvin. Let us now attempt to carry out the conversion of the units as we can see.

Now we have;

(F×0.555)+255.37=K

We know that K is the temperature in kelvin while F is the temperature in °F.

Thus;

(98.6 ×0.555)+255.37= 310.1 K

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Answer:

The distance covered by the body per unit time is called speed.

A distance travelled by the body per unit time in a fixed direction is called velocity

I hope this help u:)

Answer:

Force is an external agency that changes or tends to change the state of a body from rest to motion or from motion to rest is called force

Explanation:

The distance covered by a body in a unit time is called speed

Answer:

rank from lower to higher electronegativity

16)Li

   C

   N

17)Ne

  C

   O

18)Si

   P

   O

19)K

   Mg

   P

20)He

    S

    F