arrange these compounds from fastest sn1 reaction rate to slowest sn1 reaction rate.
Fastest rate iodomethane 1-iodo-2- methylhexane 3-iodo-2- methylhexane 2-iodo-2- methylhexane Slowest rate

Answer:

C

Explanation:

Answer:

The answer is C

Explanation:

The reason how i know this is because i just finished the test and its 100% corrects lysm have a nice day

Answer:

0.694 cents per second

Explanation:

25x100=2500 cents per hour, 2500/60 = 41.67 per minute and 41.67/60=0.694 cents per second

Answer:

At 30 degrees C, Bromine is a liquid.

Explanation:

Taking into account the definition of calorimetry, sensible heat and latent heat,  the heat of fusion of water is 335.091 \(\frac{J}{g}\) .

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).

Latent heat is defined as the energy required by a quantity of substance to change state.

When this change consists of changing from a solid to a liquid phase, it is called heat of fusion and when the change occurs from a liquid to a gaseous state, it is called heat of vaporization.

In this case:

In firts place, you know that the melting point of water is 0°C. So, first of all you must increase the temperature from -25° C (in solid state) to 0 ° C, in order to supply heat without changing state (sensible heat).

The amount of heat a body receives or transmits is determined by:

Q = c× m× ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case, you know:

Replacing:

Q1= 2.03\(\frac{J}{gC}\) × 49.3 g× 25 °C

Solving:

Q1=2501.975 J=2.501975 kJ≅ 2.50 kJ

The heat Q that is necessary to provide for a mass m of a certain substance to change phase is equal to

Q = m×L

where L is called the latent heat of the substance and depends on the type of phase change.

In this case, you know:

Replacing:

Q2= 49.3 g× ΔHfus

Similar to sensible heat previously calculated, you know:

Replacing:

Q3= 4.18\(\frac{J}{gC}\) × 49.3 g× 44.7 °C

Solving:

Q3= 9211.5078 J=9.2115078 kJ≅ 9.21 kJ

The total heat required is calculated as:

Total heat required= Q1 + Q2 + Q3

Total heat required= 2.50 kJ + 49.3 g× ΔHfus + 9.21 kJ

Heating a 49.3 g sample of g ice from -25.0 °C to water at 44.7 °C requires 28.23 kJ of heat. This is, the total heat required is 28.23 kJ. Then:

28.23 kJ= 2.50 kJ + 49.3 g× ΔHfus + 9.21 kJ

Solving:

28.23 kJ= 11.71 kJ + 49.3 g× ΔHfus

28.23 kJ- 11.71 kJ = 49.3 g× ΔHfus

16.52 kJ = 49.3 g× ΔHfus

16.52 kJ ÷ 49.3 g= ΔHfus

0.335091\(\frac{kJ}{g}\)= 335.091 \(\frac{J}{g}\) =ΔHfus

In summary, the heat of fusion of water is 335.091 \(\frac{J}{g}\) .

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Answer: A (in your answer order)

The relationship between pH and the hydroxide ion (OH-) concentration can be described by the pH scale, which is a measure of the acidity or basicity of a solution.

The pH scale ranges from 0 to 14, where a pH of 7 is considered neutral (indicating the presence of equal concentrations of H+ and OH- ions), pH values below 7 indicate acidity (indicating the presence of higher concentrations of H+ ions than OH- ions), and pH values above 7 indicate basicity (indicating the presence of higher concentrations of OH- ions than H+ ions).

Mathematically, the relationship between pH and the hydroxide ion concentration can be expressed as:

pH = -log [OH-]

where [OH-] represents the concentration of hydroxide ions in moles per liter (M).

So, as the pH increases (i.e. becomes more basic), the hydroxide ion concentration also increases, and as the pH decreases (i.e. becomes more acidic), the hydroxide ion concentration decreases.

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Answer:

As the angle the plane makes with the horizontal is increased, the magnitude of the force of static friction between the block and the plane (2) increases

Explanation:

Since the static frictional force between the block and the plane is given by F = μN where

μ = coefficient of static friction and

N = normal force on plane = component of weight of block perpendicular to the plane = Wcosθ where

W = weight of block and

θ = angle of inclined plane

Now, F = μN

F = μWcosθ

Since μ and W are constant, we see that

F ∝ cosθ and cosθ ∝ θ

So, F ∝ θ

Since the static frictional force is directly proportional to the angle the plane makes with the horizontal, when the angle the plane makes with the horizontal is increased, the static friction between the block and the plane increases.

So, As the angle the plane makes with the horizontal is increased, the magnitude of the force of static friction between the block and the plane (2) increases

Answer:

Most nuclear fuels contain heavy fissile actinide elements that are capable of undergoing and sustaining nuclear fission. The three most relevant fissile isotopes are uranium-233, uranium-235 and plutonium-239

Explanation:

Answer: There is 0.8 liters (L) of water required to be added to prepare 4800mL of 0.5M NaCl from a 3M NaCl stock solution.

Explanation:

Given: \(M_{1}\) = 0.5 M        

\(V_{1}\) = 4800 mL

Convert mL into L as follows.

\(1 mL = 0.001 L\\4800 mL = 4800 mL \times \frac{0.001 L}{1 mL}\\= 4.8 L\)

\(M_{2}\) = 3 M

Formula used to calculate the volume of water required as follows.

\(M_{1}V_{1} = M_{2}V_{2}\)

Substitute the values into above formula.

\(M_{1}V_{1} = M_{2}V_{2}\\0.5 M \times 4.8 L = 3 M \times V_{2}\\V_{2} = \frac{0.5 M \times 4.8 L}{3 M}\\= 0.8 L\)

Thus, we can conclude that 0.8 liters (L) of water need to be added to prepare 4800mL of 0.5M NaCl from a 3M NaCl stock solution.

The silver ring of the same mass of 27.5 gm of gold will have 1.9 times more atom.

We need to find moles first,

Moles = mass/ Atomic Mass

Then number of atoms can be calculated from moles,

So , no. of moles of gold ring = 27.5g/196.967

= 0.13 moles.

Since 1 mole contains 6.023 x 10^23 atoms, then 0.13 mole contains (6.023 c 10^23) x 0.13 atoms

= 7.82 c 10^22 atoms.

no. of moles for silver = 27.5/107.87

= 0.25 moles.

This contains (6.023 x 10^23) x 0.27 atoms.

= 1.5 x 10^23 atoms.

So 27.5g of silver contains 1.67 x 10^23/9.17 x 10^22 more atoms than 27.5g of gold.

So 27.5g silver contains 1.9 x more atoms than 27.5g of gold.

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Answer:

0.0048 mol Cr

Explanation:

Step 1: Define

Molar Mass of Chromium (Cr) - 52.00 g/mol

Step 2: Use Dimensional Analysis

\(0.25 \hspace{3} g \hspace{3} Cr(\frac{1 \hspace{3} mol \hspace{3} Cr}{52.00 \hspace{3} g \hspace{3} Cr} )\) = 0.004808 mol Cr

Step 3: Simplify

We are give 2 sig figs.

0.004808 mol Cr ≈ 0.0048 mol Cr

Answer:

Because density is mass divided by volume and it will always stay the same for a certain substance while mass and volume will always vary.

Contour lines farther apart indicate C. gentle slopes

On topographic maps, contour lines that are farther apart indicate gentle slopes and the correct option is option C.

A topographic map refers to a detailed, graphical, and accurate representation of features that appear on the Earth’s surface.

Topographic maps are an essential part of the field of geology due to the comprehensive analysis of a particular surface.

Contour lines are used in topographic maps for providing detailed information. These are the lines that are made by connecting the same points of equal elevation.

Therefore, On topographic maps, contour lines that are farther apart indicate gentle slopes and the correct option is option C.

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Answer:

67.08 g

Explanation:

you firts write what u know

then u calculate the molar mass of the salt

then according to the formula mass= number of mols × molar mass you find the mass

m= mass

n= number of mol

M= molar mass i hope this helps

Question

The system international (SI) unit for energy is:

Answer: joule

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Answer:

It would be around 10 grams

Explanation:

6+4

Answer:

down syndrome is research because you research the three sets of chromosome 21

Explanation:

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To make 1 liter of a 10% NaCl solution from a solid stock, you will require the following materials and containers.MaterialsSolid NaClDistilled water1-Liter volumetric flask250-mL volumetric flask 2-beakersProcedureTo prepare 1 liter of a 10% NaCl solution, the following procedure should be followed:Measure out 100g of NaCl using a balance.

Measure the weight of an empty 250-mL volumetric flask.Add the NaCl to a 250-mL beaker and add a small amount of distilled water to it to dissolve the NaCl.Carefully pour the dissolved NaCl solution into the 250-mL volumetric flask. Add distilled water to the mark on the flask to make up the volume. Stopper the flask and invert it several times to mix the solution.Measure the weight of the 1-Liter volumetric flask.Add the 250-mL volumetric flask solution to a 1-Liter volumetric flask.Add distilled water to the mark on the flask to make up the volume.

Stopper the flask and invert it several times to mix the solution.The final volume of the solution will be 1 liter of a 10% NaCl solution.PrecautionsEnsure the NaCl has completely dissolved before adding more water to avoid making a less concentrated solution.Measure the weight of the volumetric flask before and after adding the solution to calculate the volume of solution that was added.Use distilled water to prepare the solution.

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Answer:

a very small particale of matter

Explanation: something small in matter called an Atom.

Explanation:

The student most likely observed both (A) Vacuole and (C) Chloroplast that led him to the conclusion, that the cell is a plan cell.

Reason :

In a plant cell, Vacuole occupies 70% to 90% of the total volume of the cell, making it easier to identify.

Chloroplast contains photosynthetic pigment called chlorophyll (green in colour), which is only found in plant cell.

Answer:0

Explanation: zero because it is the most stable form of oxygen in its standard state

Answer:

(3)

Explanation:

Guaranteed. Look at my comment for linked picture explanation!

Answer:

It might be e=FCA

Explanation:

Warm

Explanation:

The warm air is going against the cold

Answer:

MRCORRECT has answered the question

Explanation:

13 electrons

So... for the element of ALUMINUM, you already know that the atomic number tells you the number of electrons. That means there are 13 electrons in a aluminum atom. you can see there are two electrons in shell one, eight in shell two, and three in shell three.

7 electrons

So... for the element of NITROGEN, you already know that the atomic number tells you the number of electrons. That means there are 7 electrons in a nitrogen atom. Looking at the picture, you can see there are two electrons in shell one and five in shell two.

Answer:

0.8833 mole of C3H8

Explanation:

Given:

Mass of C₃H₈ (Propane) = 38.95 gram

Computation:

Molar mass of C = 12.01

Molar mass of H = 1.008

Molar mass of C₃H₈ (Propane) = 3(12.01) + 8(1.008)

Molar mass of C₃H₈ (Propane) = 36.03 + 8.064

Molar mass of C₃H₈ (Propane) = 44.094

Number of mol in 38.95 gram Propane = Mass / Molar mass

Number of mol in 38.95 gram Propane = 38.95 / 44.094

Number of mol in 38.95 gram Propane = 0.88334

Answer:

Use the Periodic Table to find molar masses.

Propane (C3H8), a common fuel, reacts with oxygen to form carbon dioxide and water according to the equation below:

C3H8 + 5O2 → 3CO2 + 4H2O

If a propane heater burns 38.95 g C3H8, it consumes

38.95 mol C3H8.

0.8830 mol C3H8.

1 mol C3H8.

44.10 mol C3H8.

Part 2

How many moles of oxygen are required to produce 37.15 g CO2?

37.15 g CO2 = 1.407 mol O2

Part 3

What mass of propane is necessary to react with the amount of oxygen calculated in the previous question?

12.41   g C3H8