What is the end result of a dichotomous key?

The molecular formula of the compound is C₄H₈.

Let in  compound number of moles of C and H be x and y respectively.

Number of moles of CO₂ = mass of CO₂ / molar mass CO₂

= 3.14/44

= 0.0714

Number of moles of H₂O = mass of H₂O / molar mass H₂O

= 1.28/18

= 0.0711

Since 1 mol of CO₂ has 1 mol of C.

Number of moles of C in CO₂ = 0.0714

so, x = 0.0714

Since 1 mol of H₂O has 2 mol of H

Number of moles of H = 2 × 0.0711 = 0.1422

Dividing by smallest number to get simplest whole number ratio:

For, C: 0.0714/0.0714 = 1

For, H: 0.1422/0.0714 = 2

So empirical formula is: CH₂

Option 1 and option 4 has empirical formula of CH₂

molar mass of C₃H₆ = 3 × 12 + 1 × 6 = 42 g/mol

molar mass of C₄H₈ = 4 × 12 + 1 × 8 = 56 g/mol

So, the molecular formula is C₄H₈.

Hence, option 4 is correct.

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Given data:H2O vapor content: 13 gramsH2O vapor capacity: 52 grams at 25 degrees Celsius 13 grams at 10∘C52 grams at 30∘CFormula used to find the dew point:$$\dfrac{13}{52}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$\frac{1}{4}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$

Where A is the constantDew Point:It is the temperature at which air becomes saturated with water vapor when the temperature drops to a point where dew, frost or ice forms. To solve this question, substitute the given data into the formula.$$13/52=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$13(17.27-A)=3\pi A(ln100)$$By simplifying the above expression, we get$$A^2-17.27A+64.78=0$$Using the quadratic formula, we get$$A=9.9,7.4$$

The dew point is 7.4 since it is less than 10°C.More than 100:The term "More than 100" has not been used in the question provided.

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Hey there!:

Mass = 17.92 g

Volume = 2.00 mL

Density =  ??

Therefore:

D = m / V

D = 17.92 / 2.00

D = 8.96 g/mL

Hope this helps!

The density of an object is obtained as the ratio of mass of an object to its volume.

In science, density is defined as mass per unit volume. The volume of an object is the same as the volume of water displaced by the object.

Since the volume of water rose by 2.00 mL, then the volume of copper is 2.00 mL.

The density is now; mass/volume

Mass = 17.92 g

Density = 17.92 g/2.00 mL

= 8.96 g/ml

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The volume now is 182.16 L, by using gas laws.

To solve this problem, we need to use the gas laws, specifically the relationship between volume, number of moles, and gas constant. We can start by using the equation:PV = nRT where P is pressure, V is volume, n is number of moles, R is the gas constant, and T is temperature (which we can assume is constant in this problem).

Since we are given the initial volume (V1) and number of moles (n1), we can solve for the initial pressure (P1):

\(P1 = n_1RT/V_1\)
Next, we are asked to find the final volume (V2), but we only have the number of moles (n2) and the initial pressure (P1). We can use the same equation, but with the new values:
\(P_1V_1 = n_2RT\)

2:
\(V_2 = n_2RT/P1\)
Now we just need to plug in the values:
V2 = (29.9 mol)(0.08206 L·atm/mol·K)(273 K)/(\(n_1RT/V_1)\)
V2 = (29.9 mol)(0.08206 L·atm/mol·K)(273 K)/(12 miles of gas x 1609.34 m/mile x 3.78541 L/gal)
V2 = 95.4 L
Therefore, the volume of the gas at 29.9 moles is 95.4 L.
Initial volume (\(V_1\)) = 72.3 L
Initial moles (\(n_1\)) = 12 miles of gas (assuming you meant "moles" instead of "miles")
Final moles (n2) = 29.9 moles
We can set up a proportion:
\(V_1 / n_1 = V_2 / n_2\)
Now we can plug in the values and solve for \(V_2\):
72.3 L / 12 moles = \(V_2\) / 29.9 moles
Cross-multiply and solve for \(V_2\):
\(V_2\) = (72.3 L * 29.9 moles) / 12 moles
\(V_2\) ≈ 182.16 L
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The four complementary characteristics of colligative properties that a solution can display are an increase in boiling point, a decrease in freezing point, a relative decrease in vapor pressure, and an increase in osmotic pressure.

What are colligative properties?

Some characteristics of diluted solutions containing non-volatile solutes depend only on the quantity of solute particles present and not on the solute type. Collaborative qualities are what these traits are known as. Most frequently, diluted solutions exhibit these characteristics.

Collaborative properties can also be defined as those that result from the dissolution of a non-volatile solute in a volatile solvent. Typically, the solute alters the characteristics of the solvent by removing some of the solvent molecules from the liquid phase. Additionally, the concentration of the solvent is reduced as a result of this.

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Hydrogen is able to bond with itself hydrogen doesn't obey the rule of octet because it requires only 2 electrons to have its outer shell filled and gain stability.

so the bond is formed when the 2 atoms come closer  and their electrons are attracted to the proton of the other atoms hence bonding covalently

covalent bond is a type of bond in which a chemical bond that involves the sharing of electrons to form electron pairs between atoms

Helium cannot form covalent bonds this is because it has a complete shell of electrons and in this state, the atom cannot readily accept any additional electrons or join with any element or atoms to make a bond also the gas is a noble its valence shell is full and it gains no stabilizing effect forming covalent bonds.

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Answer:

It produces two identical daughter cells

Explanation:

1 haploid splits into 2 genetically identical haploid cells which are called daughter cells

same thing with diploid cells

People are genetically predisposed to their body types, but once diet becomes a factor, the environment begins to play a major role in how the body develops. As a result, it can be concluded that external factors influence the genetic constituent.

The external factors, such as food and environment, affect the genetic constitution of the person because when the person consumes junk food that has carcinogenic products, it can change the genes of the cells and cause cancer, obesity, etc. In this way, genes are regulated by external factors too.

Hence, it can be concluded that external factors influence the genetic constituent.

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Answer:

for the how to get a carrot to float you would need to make a hole in it and make it hollow

Explanation:

Answer:

Solid = rocks or other hard stuff

Liquid = water or mild or other stuff likt that

Answer:Ice is an example of a solid. A liquid has a defined volume, but can change its shape. Water is an example of a liquid. A gas lacks either a defined shape or volume.

...

Examples of gases include:

Air.

Natural gas.

Hydrogen.

Carbon dioxide.

Water vapor.

Freon.

Ozone.

Nitrogen.

Explanation:

Among the given radicals, R3C is the most stable radical, while CH3 is the least stable radical.

Stability of radicals is influenced by factors such as electron delocalization, hyperconjugation, and steric hindrance. In this case, R3C (tertiary radical) is the most stable radical due to the presence of three alkyl groups attached to the carbon atom. The alkyl groups provide electron-donating inductive effects and allow for efficient electron delocalization, which stabilizes the radical.

On the other hand, CH3 (methyl radical) is the least stable radical. It has only one alkyl group attached to the carbon atom, limiting the electron-donating inductive effects and electron delocalization. As a result, the methyl radical is less stable compared to the other radicals provided.

RCH2 (secondary radical) and R2CH (primary radical) have intermediate stability between R3C and CH3. The number of alkyl groups attached to the carbon atom affects the stability, with more alkyl groups providing greater stabilization through electron delocalization.

Therefore, among the given radicals, R3C is the most stable radical, while CH3 is the least stable radical.

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Approximately 0.06 grams of N2 were needed. This number of entities is approximately 6.022 x 10^23 and is known as Avogadro's number.

What is Moles?

Moles are a unit of measurement used in chemistry to express amounts of a chemical substance. One mole is defined as the amount of a substance that contains as many elementary entities (such as atoms, molecules, ions, or electrons) as there are atoms in 12 grams of pure carbon-12.

The balanced chemical equation for the reaction between oxygen and nitrogen is:

N2 + O2 -> 2NO

From the equation, we see that 1 mole of N2 reacts with 1 mole of O2 to produce 2 moles of NO. Therefore, if 0.004 moles of O2 reacted, then we need half as many moles, or 0.002 moles of N2.

To convert moles of N2 to grams, we need to use the molar mass of N2, which is approximately 28 g/mol. Thus, the mass of 0.002 moles of N2 is:

0.002 moles N2 x 28 g/mol = 0.056 g N2

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The species would be an anuran (an amphibian)

We need to answer this in English.

Here we want to find "A species that mates on the surface and then deposits its eggs in the water to be surrounded by sperm"

This would be known as a species of amphibian called an anuran, specifically a frog or toad.

Frogs and toads belong to the order Anura and have a characteristic reproductive cycle that involves external fertilization. During reproduction, the male releases his sperm into the water, and the female deposits her eggs in the water as well. The eggs are externally fertilized by sperm that swim around them. This process is known as external or external fertilization.

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Leachate is a liquid generated by water flow into or out of landfill material.

Let's understand this in detail:

Leachate is the liquid from water flowing into or out of landfill material. It is generally generated as precipitation infiltrates waste deposited in landfills and produces a polluted fluid that is toxic to the environment. Leachate is a potential cause of pollution to the natural environment and surrounding regions. Waste incineration, hazardous waste left over from the biochemical degradation of chemical wastes, methane gas that leaks from sanitary landfills, and an ash byproduct of waste incineration are all irrelevant parts of the question, and it's essential only to answer what is asked.

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Answer:

See below.

Explanation:

A dynamic equilibrium in chemistry refers to a situation in which the reaction of reactants to form product(s) in which the products can reverse the reaction by falling apart and back to the reactants.  Reactions that go to completion are irreversible.  In cases where reactants form products (in a forward reaction), but the products can change back into reactants (in a reverse reaction) are called reversible.

An example is the reaction of carbon dioxide with water to form carbonic acid (think soft drinks).

     CO2(g)+H2O(l) ⇌ H2CO3(aq)

As anyone who has opened a warm can of soda knows, it can erupt suddenly and spray anyone nearby with a shower of bubbly, and sticky, soda.  Carbonic acid is unstable and will happily decompose back to it's reactant molecules if given the chance.

Experience tells us what to expect when giving a brother or sister a can of warm soda that you've shaken hard for a minute.  But if you are a chemist, such responses aren't always easy to predict with a new reaction.  Equilibrium constants were developed to provide a means for presdicting the exstent of these reactions.  They are used in equilibrium equations to predict the concentrations of products and reactants, given conditions of temperature and pressure, under defined conditions of temperature and pressure.

The equations themselves include concentrations as the key input.  In the carbonic acid example, if one were to add excessive amounts of one of the reactants, one would expect the equilibrium to "shift to the right."  This simply means that more carbonic acid would be made.  The chances of the forward reaction increase as concentration increases.  The amount of CO2 given off as a gas depends on the concentration of the CO2 in the gas phase, which is given by the partial pressure of the gas.

The space above the soda and the cap represents one place that the CO2(g) can escape the solution.  The CO2 pressure in the gas phase is a measure of it's concentration.  An equilbium calculation takes this concentration in account when decidng how much much of each component is present.  Other compouns that are present may also impact the equilibrium since they may interfere with one of the reaction steps.  Pressure and emperature either dirctly impact the concentration (e.g., gases) or they affect the "effective" concentrations of the compunds.  A higher temperature creates more collisons between reactant molucules that may change the equilibrium constant..

Answer:

True.

Explanation:

To describe the problem of trying to locate a subatomic particle that behaves  like a wave, Werner Heisenberg formulated what is now known as the Heisenberg  uncertainty principle: it is impossible to know simultaneously both the momentum p  (defined as mass times velocity) and the position of a particle with certainty.

Making measurement of the momentum of a particle more precise means that the position must become correspondingly less  precise. Similarly, if the position of the particle is known  more precisely, its momentum measurement must become less precise.

The best description of the product of the given reaction with LIAIHA and H2O, dil, aq HCI is a mixture of diastereomers.

Based on the information provided, the best description of the product of the reaction with the given reagents (1) LIAIH4, and (2) H2O, dilute aq HCl, is a "mixture of diastereomers."

Here's a step-by-step explanation:

1. LIAIH4 (Lithium aluminum hydride) is a strong reducing agent that reduces various functional groups, including carbonyl groups, to their corresponding alcohols.

2. The reaction proceeds through nucleophilic addition, and the stereochemistry of the product depends on the starting compound.

3. H2O and dilute aq HCl are used to work up the reaction mixture, which neutralizes any remaining LIAIH4 and helps isolate the product.

4. Since the starting compound has more than one stereocenter, and reduction with LIAIH4 changes only one of these centers, the product will have a mixture of diastereomers due to the different possible stereochemical configurations at the unaffected stereocenters.

In summary, the product of this reaction will be a mixture of diastereomers, as it involves a stereochemistry change at only one stereocenter while the others remain unaffected.

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47.1 ml of acetone has a mass of 37.2 g when the density is 0.7899 g/ml.

As stated in the question,

the density of acetone = 0.7899 g/ml

as we know, the mass of a substance per unit of volume is its density which means 0.7899 g ( mass) is present in 1 ml (volume). Hence, by the unitary method:

0.7899 g -> 1ml

1g-> 1/0.7899 ml

37.2 g -> 37.2/0.7899 ml = 47.1 ml

47.1 ml of acetone has a mass of 37.2 g.

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we need to use 6.96 grams of the solid to prepare a 0.100 m aqueous solution with a volume of 250.0 ml.

To prepare a 0.100 m aqueous solution with a volume of 250.0 ml, we need to calculate the number of moles of the solute required using the formula:
Molarity = moles of solute / volume of solution in liters

0.100 mol/L = moles of solute / 0.250 L

moles of solute = 0.100 mol/L x 0.250 L = 0.025 mol

Now we can use the molar mass of the solid to calculate the mass required:

mass = moles of solute x molar mass

mass = 0.025 mol x 278.5 g/mol = 6.96 g

Therefore, we need to use 6.96 grams of the solid to prepare a 0.100 m aqueous solution with a volume of 250.0 ml.

To prepare a 250.0 mL of a 0.100 M aqueous solution using a pure solid with a molar mass of 278.5 g/mol, you will need to use the following formula:

mass (g) = volume (L) × molarity (M) × molar mass (g/mol)

First, convert the volume from mL to L:
250.0 mL = 0.250 L

Next, plug in the values into the formula:
mass (g) = 0.250 L × 0.100 M × 278.5 g/mol

Calculate the mass of the solid:
mass (g) = 6.9625 g

You should use 6.9625 grams of the solid to make the 250.0 mL of 0.100 M aqueous solution.

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To prepare a 0.100 m aqueous solution with a volume of 250.0 ml, we need to use the formula:

moles of solute = Molarity x Volume (in liters)

First, we need to convert the volume from milliliters to liters:
250.0 ml = 0.250 L

Now, we can substitute the given values into the formula:
moles of solute = 0.100 mol/L x 0.250 L
moles of solute = 0.025 mol

Next, we need to calculate the mass of the solid we need to use. We can use the formula:

moles of solute = mass of solute / molar mass

Rearranging the formula, we get:
mass of solute = moles of solute x molar mass

Substituting the given values, we get:
mass of solute = 0.025 mol x 278.5 g/mol
mass of solute = 6.9625 g

Therefore, you should use 6.9625 grams of the solid to prepare a 250.0 ml of a 0.100 m aqueous solution.

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Answer:

The answer is "Ammonium nitrate is the reactant of this chemical reaction".

Explanation:

The Ammonium nitrate (NH4NO3)  is an ammonium and nitrate ionic crystalline solid. In water and hygroscopic as a strong, it's also highly soluble, although it does not form hydrates.

It uses as a nutrient for generating medications as well as leaven fertilizers and explosive materials. Nitrate in ammonium is sodium bicarbonate ammonium chloride. It is incendiary, an oxidizing agent, and a fertilizer.

The type of bond that will result if the atom Cs and F combine will be an electrovalent bond or ionic bond.

Caesium belongs to Group 1 in the periodic table with an electronegativity of 0.79.

Group 1 elements are also known as alkali metals.

And the other compound which is mentioned in the question is Fluorine F. It belongs to the family of halogen with electronegativity of 4.0. Group 7 in the periodic table is halogen family.

As their is high electronegativity difference between group 1 metals and group 7 elements so ionic bond is formed between them

Therefore, Cs and F form Cs F via electrovalent bonding or ionic bonding with one another.

Your question is incomplete most probably your full question was

What type of bond will result if the atoms below combine? The electronegativity of each atom is given.

Cs0.79

F4.0

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Answer:

B.

Explanation:

The most abundant element in the Earth's crust is oxygen, making up 46.6% of Earth's mass.

Answer: There are many ways. (Check Explanation)

Explanation: Electrons are found outside of the nucleus. Now in the middle of the nucleus there are protons in neutrons. The way to determine the number of neutrons in the Bohr Model are many ways.

Number one, if the neutrons, protons, and electrons were color coded, take away the electrons and you are left with the 2. Then find out which color corresponds to the neutron.

If it isn't color coded, then the protons and electrons should usually be marked with either + or - on it. The one without any of this and that is in the nucleus is the neutron. Last but not least, on some of the models, it can show many protons or neutrons are in the nucleus. For example the potassium bohr model. (Check image) On here, 19+ means 19 protons and 20N means 20 neutrons.

Answer:

yung una po

Explanation:

kasi meron yan sa grade 6

Answer:

The Answer Is B The Sun,The Moon,And Earth Are In A Straight Line

Explanation:

Hope This Helps!

Generally, lead–acid battery consists of two electrodes which are submerged in an electrolyte of sulfuric acid.

Basically lead–acid battery consists of two electrodes submerged in an electrolyte of sulfuric acid. The positive electrode is made up of grains of metallic lead oxide, while the negative electrode of the battery is attached to a grid of metallic lead.

The Lead acid batteries are usually found in a wide variety of applications including small scale power storage such as UPS systems, starting lighting and ignition power sources for automobiles, along with large, grid-scale power systems. There are 3 various types of lead-acid batteries which includes flooded acid, gelled acid, and Advanced AGM (Absorbed Glass Mat) batteries.

The question is incomplete so, I have answered according to general knowledge.

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According to OSHA (Occupational Safety and Health Administration), safety measures for using dental materials with potentially hazardous chemicals can be found in sources such as Material Safety Data Sheets (MSDS), OSHA's Hazard Communication Standard (HCS), and dental office safety manuals or protocols.

According to OSHA (Occupational Safety and Health Administration), safety measures that should be taken when using dental materials with potentially hazardous chemicals can be found in a few different sources:

Material Safety Data Sheets (MSDS): Manufacturers of dental materials are required to provide MSDSs for their products. These sheets contain detailed information about the potential hazards, safe handling procedures, storage recommendations, and emergency measures related to the chemicals present in the dental materials.

OSHA's Hazard Communication Standard (HCS): This standard requires employers to provide information and training to employees about the hazardous chemicals they may be exposed to in the workplace. The HCS ensures that employees have access to information on the hazards, proper handling, and use of hazardous chemicals, including dental materials.

Dental Office Safety Manuals or Protocols: Dental offices often develop their own safety manuals or protocols that outline specific safety measures for handling dental materials. These may include guidelines on proper storage, handling, personal protective equipment (PPE) requirements, spill cleanup procedures, and waste disposal methods.

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The amount of heat given off by lead is Q = - 1776.5J

Given,

Mass of the lead = 85g

Decreased temperature = 200 ⁰c to 10 ⁰c

Specific heat capacity of lead= 0. 11 j/g ⁰c

where T1=200degrees Celsius and T2=10 degree Celsius.

Q=MCΔT

ΔT=T2-T1

ΔT=10-200 = -190°C

Q = Change in energy

M = mass of a substance

C= Specific heat capacity

Q = (85g) * (0.11J/g °c) * (-190°C)= -1776.5J

Q=-1776.5J

Specific heat capacity:

A material's specific heat capacity, also known as massive heat capacity, is determined using thermodynamics as the specific heat of an unit of the compound scaled by the the sample's mass.

The specific heat capacity of a substance is defined as the number of heat (J) received per unit of mass (kg) when its temperature increases 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).

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Answer:

The products are Calcium bromide and Iodine.

Explanation:

According to Group 7 (or Group 17) in the periodic table, as it goes down the group, the less reacrive it is, so bromine is reactive than iodine and will displace iodine from calcium.

Bromine + Calcium iodide → Calcium bromide + iodine

The products of the given reaction is Calcium bromide as solid precipitate and Chlorine gas.

Bromine and iodine are the the members of the halogen group. Bromine is more reactive than the Iodine,hence bromine will replace the iodine from the calcium iodide to form calcium bromide.

The reaction will be,

\(\bold {CaI_2(aq) +Br_2(aq) \rightarrow CaBr_2(s) + I_2(g)}\)

Therefore, the products of the given reaction is Calcium bromide as solid precipitate and Chlorine gas.

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Answer:

C

Explanation:

The weeds will be replaced by woody shrubs and some small trees.

If the forest land is cleared, it is hard to construct a forest again. The cleared land will grow as grass land then if there is no constructions or buildings fills the land. Hence, option B is correct.

Forestation is the process of formation of forests and dense growth of trees and other kinds of plants. Forests are example of ecosystems and  wide variety of plant species and animals are living there.

Nowadays, deforestation is common for the selfish purposes of man to buildups their own amenities so that, many more plants and animals are on the edge of extinction.

There are naturally made forests as well as man made forests.  It was results of hard working that to form a forest with all its atmosphere and biodiversity will take longer time. It will not happen within just five years.

Thus,  if the forest land is cleared, the empty ground may fill with grasses and flower plants. Hence option B is correct.

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