Reaction of an alkene with H2 to form an alkane is an example of a(n) _____ reaction because there is a(n) _____ in the number of C-H bonds. Multiple choice question. reduction, increase reduction, decrease oxidation, increase oxidation, decrease

colorless liquid, clear solution, microcrystalline solid, white solid in statement above is quantitative data. The mass and volume both include significant numbers of 3 and 2, respectively.

A tasteless and colorless liquid, pure water has neither. We can conclude that the provided liquid is pure water if it boils at 100 °C (373 K) and freezes at 0 °C (273 K) both at 1 atmosphere pressure.

Water, often called as the universal solvent, is a flavorless and odorless chemical that is necessary for all known forms of life. Small concentrations are colorless to the unaided eye. On Earth, it covers around 70% of the surface.

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Answer:

You use the fact that 1 mole of any substance contains exactly 6.022⋅1023 atoms or molecules of that substance - this is known as Avogadro's number. In your case, 1 mole of gold will have exactly 6.022⋅1023 atoms of gold.

Explanation:

Explanation:

Refer to pic.............

Answer:

The answer is Na2CO3.Option a

Answer:

wind and water erosion

Answer:

C is the answer

answer; the last two is me and u :

The chemical reaction between CaCO3 (calcium carbonate) and heat yields CaO (calcium oxide) and CO2 (carbon dioxide) is a decomposition reaction.

The reactant is broken down into its constituents in a decomposition reaction. During the reaction, calcium carbonate is thermally decomposed into calcium oxide and carbon dioxide gas, which is a reversible reaction.Here is a detailed answer.The equation is as follows:CaCO3(s) → CaO(s) + CO2(g)The chemical reaction between calcium carbonate and heat is a decomposition reaction. It is known as a thermal decomposition reaction or calcination.

                                   The heat causes the calcium carbonate to break down into its two primary elements: calcium oxide and carbon dioxide gas. The reaction can be represented as follows:CaCO3 → CaO + CO2In this equation, the reactant is calcium carbonate, and the products are calcium oxide and carbon dioxide. Calcium oxide and carbon dioxide are produced as a result of this decomposition reaction.

                                              The reaction can be reversed if calcium oxide and carbon dioxide are heated to a sufficiently high temperature. The reaction is a crucial step in the process of manufacturing cement. Limestone, which contains calcium carbonate, is heated to high temperatures in a kiln to produce calcium oxide and carbon dioxide. The calcium oxide, also known as quicklime, is then used to make cement.

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Kilometers (km) and miles (mi) are the preferred units for measuring the distance between cities in scientific contexts.

The distance between cities is an essential measurement for scientists, and it is typically expressed in kilometers (km) or miles (mi).

Kilometers (km) are widely adopted by scientists as the primary unit of distance measurement globally.

It is the standard unit in the metric system, which is widely used in scientific research and international communication.

One kilometer is equal to 1000 meters, providing a convenient scale for measuring long distances.

For example, a distance of 100 km between two cities indicates that they are separated by 100,000 meters.

In the United States and the United Kingdom, miles (mi) are commonly used to measure distances.

Although not as prevalent in scientific literature as kilometers, miles are still utilized, especially when dealing with transportation-related data or working within these regions.

One mile is equivalent to approximately 1.6 kilometers. For instance, if the distance between two cities is 50 miles, it means that the two cities are approximately 80.5 kilometers apart.

kilometers (km) and miles (mi) are the preferred units for measuring the distance between cities in scientific contexts.

Kilometers are the global standard, while miles are commonly used in specific regions.

Both units provide scientists with effective measurements for studying and analyzing geographical distances.

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The  type of compound is formed between coach and a carboxylic acid alcohol + carboxylic acid → ester + water.

How carboxylic acids are formed?

A acid is produced after the acidic hydrolysis of esters and carboxylates are produced after the basic hydrolysis of an ester.

What are the functional group of alcohol and carboxylic acid?

Alcohols contain the hydroxyl functional group and may be primary, secondary, or tertiary. Ethers are compounds with an oxygen atom bonded to 2 alkyl groups. Aldehydes and ketones contain the carbonyl functional group

Can a compound be a acid and an alcohol?

Esters are represented by the formula RCOOR', where R and R' are hydrocarbon groups. The ester, which is compound derived from a carboxylic acid and an alcohol in which the OH of the acid is replaced by an OR group, looks somewhat sort of a n ether and also somewhat like a carboxylic acid.

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Answer:

Explanation:

A molecule, for example of water, contains 2 hydrogen atoms and 1 oxygen atom chemically bonded together and is the smallest building block of the chemical water. ... A mole is a certain quantity of molecules, specifically 6.02 x 10^23.

Hope this helps!

Answer:

D.

Explanation:

Temperature differences among layers of the atmosphere is the cause for global winds

To make a 2 x 10⁻⁵ M solution of dye in 4 mL, it is needed to take 0.08 ml of the dye stock solution.

Concentration refers to the amount of a substance in a defined space. Another definition is that concentration is the ratio of solute in a solution to either solvent or total solution.

There are various methods of expressing the concentration of a solution.

Concentrations are usually expressed in terms of molarity, defined as the number of moles of solute in 1 L of solution.

Solutions of known concentration can be prepared either by dissolving a known mass of solute in a solvent and diluting to a desired final volume or by diluting the appropriate volume of a more concentrated solution (a stock solution) to the desired final volume.

C₁ = 1 x 10⁻³ M (concentration of the stock solution)

C₂ = 2 x 10⁻⁵ M (desired concentration of the diluted solution)

V₂ = 4 mL (final volume of the diluted solution)

Putting these values into the dilution formula:

(1 x 10⁻³ M)(V₁) = (2 x 10⁻⁻⁵ M)(4 mL)

V₁ = (2 x 10⁻⁵ M)(4 mL) / (1 x 10⁻³ M)

= (8 x 10⁻⁵ mL) / (1 x 10⁻³ M)

= 0.08 ml

Volume = 0.08 ml

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Answer:

do the math then hope sorry man free answer

Explanation:

Answer:

Molarity is the number of moles of a substance per litre. Thus to calculate the molarity, divide the number of moles with the volume in litres.

For example, 0.2 moles of NaCl is dissolved in water to form a solution of 150 mL.

Volume in litres= 150 ÷1000= 0.15 L

Molarity

= 0.2 ÷0.15

= 1.33 M (3 s.f.)

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250.0 mg of copper(II) sulfate pentahydrate was dissolved in 10.00 mL of solution. The concentration of the copper ion in the final solution is 0.8012 mmol/L.

To find the concentration of the copper ion in the final solution, we can use the concept of dilution.
First, we need to calculate the amount of copper(II) sulfate pentahydrate used in the new solution.
Since 250.0 mg of copper(II) sulfate pentahydrate was dissolved in 10.00 mL of solution, we can use the formula:
Amount = (concentration) x (volume)
Converting the mass to moles:
Amount = (250.0 mg) / (249.70 g/mol)

= 1.0016 mmol
Since 2.00 mL of the initial solution was used, the amount of copper(II) sulfate pentahydrate transferred is:
Amount transferred = (1.0016 mmol) x (2.00 mL / 10.00 mL)

= 0.2003 mmol
Next, we calculate the concentration of the copper ion in the final solution by dividing the amount transferred by the total volume:
Concentration = (0.2003 mmol) / (250.0 mL)

= 0.0008012 mmol/mL
Converting to moles per liter (mmol/L) or Molarity:
Concentration = 0.0008012 mmol/mL

= 0.8012 mmol/L
Therefore, the concentration of the copper ion in the final solution is 0.8012 mmol/L.

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According to the given picture:

A represents the atomic number.

B represents the chemical symbol.

C represents the atomic mass.

D represents the name of the element.

1. Structure of an atom:-

The basic structure of an atom includes a tiny, relatively massive nucleus, containing at least one proton and usually one or more neutrons.Outside of the nucleus are energy levels (also called shells), which contain one or more electrons.

Properties of an atom:-

The neutrons have the greatest mass and have no charge. The protons have slightly less mass than the neutrons and are positively charged. The electrons have almost no mass and are negatively charged. The chemical properties of the atom are determined by the number of protons, in fact, by number and arrangement of electrons.

2. Elements and their chemical symbols :-

1) Sodium - Na

2) Carbon - C

3) Magnesium - Mg

4) Aluminium - Al

5) Silicon - Si

6) Chlorine - Cl

7) Potassium - K

8) Calcium - Ca

9) Copper - Cu

10) Iron - Fe

3. ionic bond

Covalent bond

Metallic bond

4. pH scale used to specify the acidity or basicity of an aqueous solution. Acidic solutions are measured to have lower pH values than basic or alkaline solutions

5. There are four natural states of matter: Solids, liquids, gases and plasma.

6. Law of conservation of mass :

The 'law of conservation of mass' says that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. The mass of the products in a chemical reaction must equal the mass of the reactants.

Law of conservation of energy :-

According to the law of conservation of energy, energy can only be transformed from one form to another. It can neither be created nor destroyed. The total energy before and after the transformation always remains constant.

During that icy hot lab, 65,000 J of energy was transferred to 450 g of water at 20°C, the final temperature of the water will be 54.5 °C.

Energy transferred = 65,000 J or 65 KJ

Mass of the water = 450 g

Initial temperature (T1) = 20 °C

Final temperature (T2) = ?

Specific heat of H2O = 4.186 J /g. °C

We will calculate the final temperature by using the following equation.

q = m.c.ΔT

Rearrange it for ΔT

ΔT = q / m.c

And ΔT = T2 - T1

Put ΔT value in the equation

T2 - T1 = q / m.c

Put the values

T2 - 20°C = 65000 j / 450 g × 4.186 J /g. °C

T2 - 20°C = 65000 j / 1883.7 j /°C

T2 - 20°C = 34.51 °C

T2 = 34.51 °C + 20 °C

T2 = 54.5 °C

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Answer:

The answer is

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

\(volume = \frac{mass}{density} \\ \)

From the question

mass of iron = 15.64 g

density = 2.27 g/cm³

The volume is

\(volume = \frac{15.64}{2.27} \\ = 6.889867841...\)

We have the final answer as

Hope this helps you

Answer:

Explanation:

The correct answer is B. isotopes.

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons. This difference in the number of neutrons leads to variations in their atomic mass but does not affect their chemical properties or reactivity. Isotopes of an element have similar chemical behaviors but may have slightly different physical properties due to the difference in atomic mass.

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Answer:

Based on general trends, the reaction of NaOH with water is typically more exothermic than the reaction of NaSH with water

Explanation:

The reaction that is more exothermic, or releases more energy in the form of heat, depends on the specific reaction conditions and the stoichiometry of the reaction.

Assuming you are comparing the reactions of sodium hydroxide (NaOH) and sodium hydride (NaSH) with water (H2O), the reactions can be represented as follows:

NaOH + H2O -> Na+ + OH- + H2O

NaSH + H2O -> Na+ + SH- + H2O

In both reactions, sodium ions (Na+) are formed along with hydroxide ions (OH-) or sulfide ions (SH-), respectively. Both reactions involve the same alkali metal, sodium (Na), reacting with water (H2O).

To determine which reaction is more exothermic, we need to consider the enthalpy change (ΔH) associated with each reaction.

The enthalpy change of a reaction depends on factors such as the strength of the bonds broken and formed during the reaction.

Sodium hydroxide is a strong base, and its reaction with water is highly exothermic, releasing a significant amount of heat.

On the other hand, sodium hydride is not typically used as a strong base and its reaction with water may be less exothermic.

It's important to note that to provide a definitive answer, specific enthalpy data or experimental values would be required for these reactions under the given conditions.

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Answer:no idea

Explanation:

I js needed points

The entropy of the system increases if equal volumes of ethanol and water are mixed to form a solution and the volume of a gas increases.

The entropy of the system stays the same if the temperature of the system increases

Entropy can be thought of as a measure of the system's "disorder" or "randomness."

A system with high entropy has many possible arrangements, and its constituents are more randomly distributed, while a system with low entropy has fewer possible arrangements and is more ordered.

A. Equal volumes of ethanol and water are mixed to form a solution: When two substances with different molecular arrangements (ethanol and water) are mixed, the number of microstates available to the system increases, leading to an increase in entropy.

B. The volume of a gas increases: When the volume of gas expands, the gas molecules have more space to move around, resulting in an increase in the number of possible arrangements and, therefore, an increase in entropy.

The entropy of the system stays the same for the following condition:

C. The temperature of the system increases: The entropy change due to a temperature increase depends on the specific system. For ideal gases, the entropy increases as the temperature rises.

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Your question is incomplete, but most probably your full question was,

Does the entropy of the system increase, decrease, or stay the same for each of the following conditions: Increases, Decreases, Stays the same

1. Equal volumes of ethanol and water are mixed to form a solution

2. The temperature of the system increases.

3. The volume of a gas increases.

According to the given statement The amount of heat that water absorbs is 878.64 J.

Equation q = -CT, where C seems to be the calorimeter's heat capacity and T is the temp change, can be used to determine how much heat is released during the reaction. Since the combustion takes place at a fixed volume, the reaction's q is equal to E.

Amount of water = m = 75.0 g

Specific heat capacity of water = c = 4.184 J /g⁰C

Initial temperature of water = T = 23.0⁰C

Final temperature of water = T' = 20.2⁰C

The phrase for how much heat water absorbs is presented below.

q = mcΔT

q = 75.0 g * 4.184 J /g⁰C * (23.0 - 20.2)⁰ C

q = 878.64

The amount of heat that water absorbs is 878.64 J

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Answer:

Hypothesis is a statement of expectation or prediction that will be tested by research

The type of subatomic particles that can be located within the nucleus of an atom is protons and neutrons. The correct option is C.

Subatomic particles are those particles that are present inside the atoms. These are present in different locations inside the atom. They are charged particles.

An electron is a negatively charged particle that rotates around the nucleus and a neutron is neutral, and a proton is a positively charged particle. Proton and neutrons are present inside the nucleus.

Thus, the correct option is C. protons and neutrons.

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1.  Consider the reaction: 5 A + 3 B → 2 C The rate of the reaction is found to be 0.0486 M/s. Then, The rate of change of B is 0.01215 M/min.

2.  For the following zero order reaction, the rate constant is 0.0311.

If [A₀] = 8.68, calculate [A] at 2.9 seconds. Then, [A] = 8.66445 ≈ 8.7.

(1) For Reaction : 5A + 3B → 2C

R₁ : 0.080486 M/s = K[A][B]²          ---------------------- (1)

When half of the B has reacted, then,

⇒ R₂ = k[A][B/2]                   -------------------------- (2)

Dividing (2) and (1), we get:

   R₂÷ R₁ = K[A] [B/2] ÷ K[A] /[B]

⇒  R₂÷ R₁ = B²/4 ÷ B²

⇒ R₂÷ R₁ = 1/4

Therefore,

R₁ /4 = 0.0486/ 4

        = 0.01215 M/minute.

Therefore,

Consider the reaction: 5 A + 3 B → 2 C The rate of the reaction is found to be 0.0486 M/s. Then, The rate of change of B is 0.01215 M/min.

(2) For a Zero Order reaction:

t = K[A₀] [A] ÷ K               ------------------------- (1)

Given that:

t = 2.9 Second

and, k = 0.0311

Converting Seconds into minutes:

t = 2.9 second = 0.048 Minutes ≈ 0.5 Minutes.

Putting the values in equation (1)

⇒ 0.5 = 8.68 - [A] ÷ 0.0311

⇒ 0.5 × 0.0311 = 8.68 - [A]

⇒ 0.01565 - 8.68 = - [A]

⇒ [A] = 8.66445

Therefore, [A] = 8.66445 ≈ 8.7

Based on the zero order reaction, the rate constant is 0.0311. If [A]0 = 8.68, calculate [A] at 2.9 seconds. Then, [A] = 8.7

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I think and I'm sure it is gases

Answer:

gasses

Explanation:

i took the quiz

Answer: C.  

Explanation: These offspring inherited a DNA sequence coding for white flowers from each parent plant.

:)

The size of your final PCR product will be 214.On page 3 of the human mitochondrial genome map, the difference between the left and right primer was used to forecast the size of the PCR result.

On page 3 of the human mitochondrial genome map, the difference between the left and right primer was used to forecast the size of the PCR result. According to estimates, the PCR result is 450 base pairs larger than the DNA ladder.

Given that the new primer used amplifies 130 base pairs that are adjacent to

a) 14 base pair  and

b) Has 6 repeats

Determine the size of the final PCR product

( number of base pair * number of repeats ) + Initial/primer amplicon value

= ( 14 * 6 ) + 130

= 84 + 130

= 214

Hence we can conclude that the size of the final PCR product is 214.

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