6. With a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds? Or do we have many compounds in this world?

Answer:DNA

Explanation:Dna

Answer:

The 50 kg object will have a smaller acceleration.

Explanation:

The two forces exerted on the objects are equal and F=ma, so a greater mass means a smaller acceleration while a greater acceleration means a smaller mass.

Main answer: The low yield of primary amine in the reaction of an alkyl halide with ammonia is due to the formation of secondary and tertiary amines via nucleophilic substitution reactions.

Explanation: In the reaction of an alkyl halide with ammonia, the nitrogen atom of ammonia acts as a nucleophile and attacks the carbon atom of the alkyl halide. This results in the formation of a primary amine, as the nitrogen atom is attached to only one alkyl group. However, the reaction is not very efficient in producing primary amines because the nitrogen atom can also react with the alkyl halide to form secondary and tertiary amines. Secondary amines have two alkyl groups attached to the nitrogen atom, while tertiary amines have three alkyl groups attached. Since secondary and tertiary amines can also form in this reaction, the yield of primary amines is reduced. The formation of secondary and tertiary amines occurs due to steric hindrance or the availability of more electrophilic carbons, which can undergo a second nucleophilic attack.

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Answer:

2.53%

Explanation:

mass percent = (mass of solute/mass of solution)×100%

mass percent = [6.5 g/(6.5 + 250) g]×100% = 2.53%

Explanation:

It should be decreasing, and the potential energy increasing, since Law of Conversation of Energy, right?

Also, if you think about what happens when it goes down, it loses potential and gains kinetic, so maybe the opposite should happen when it goes up.

Answer:

it's decreasing

Explanation:

as you know a roller coaster loses speed as it ascends and the kinetic energy is proportional to the speed according to it's formula

KE=(mv^2)/2

where m is the mass and v is the speed

The temperature scale that the water boiling point is represented by the largest number is: Kelvin scale

We can measure the temperature with three different scales: Kelvin, Fahrenheit and Celsius. And we can convert the temperature units using these simple formulas:

T(°C) = T(K) -  273.15

T(°C) = [T(°F) -32 * 5] / 9

K = 5/9 (ºF – 32) + 273.15

When we talk about water boiling point represented in the different temperature scales, we get:

The largest number is: 373 from the kelvin scale

It is a measure that allows us to know the hotness or coldness of a body or an environment. The higher the temperature, the greater the degree of heat.

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Of the molecules below, the bond in H₂ is the most polar. therefore option D is correct.

Polarity in a chemical bond is determined by the electronegativity difference between the atoms involved in the bond. Electronegativity is the ability of an atom to attract electrons toward itself.

In the case of HF, hydrogen fluoride, the electronegativity of fluorine (F) is significantly higher than that of hydrogen (H). Fluorine is the most electronegative element on the periodic table, indicating a strong attraction for electrons.

The large electronegativity difference between hydrogen and fluorine in HF creates a highly polar covalent bond.

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In order to determine a combination's value, we must use the formula

n^C_m = n! / (n−m)! * m!

You must provide an opinion or conclusion regarding the validity of a claim or a group of research findings in order to "critically analyze." This should be carried out with the utmost seriousness. Give your assessment on the truthfulness of a claim or research finding.

The whole solution, in steps:

It is necessary to determine 2C2's value.

The value is entered into the formula

Formula : n^C_m = n! / (n−m)! * m!

We set m=2 and n=2

2^C_2=2! / (2 - 2) * 2! is the result, then.

2! = 2!/0!×2! = 1

Hence, 2^C_2=1.

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Answer:

bnsjsbbakakaisbsbwnsjznss

Explanation:

cnsjzjsnsnsjs ssnsnsnzksmnznnzna

Answer:

let me tell u what ASAP stands for Explanation:

Answer:

The spinal cord sends messages to the brain to help it function, they are your body's central nervous system

Hope This Helps, Good Luck!!!!

Explanation:

Answer:

It's A

Explanation:

The mass of (NH4) 2S in the solution is : Mass = 0.0600 mol × 60.08 g/mol = 3.60 g.

The given molarity and volume of the solution can be used to calculate the number of moles of ammonium sulfide (NH4)2S.Then, the number of moles can be converted to mass using the molar mass of (NH4)2S.Mass of ammonium sulfide (NH4)2S in 3.00 L of a 0.0200 M solution is given by : Mass = moles × molar mass.The number of moles of (NH4)2S can be found using the equation:Molarity = Number of moles / Volume.Rearranging this equation, we get:Number of moles = Molarity × Volume Number of moles of (NH4)2S = 0.0200 M × 3.00 L.Number of moles of (NH4)2S = 0.0600 mol.The molar mass of (NH4)2S can be calculated by summing the molar masses of ammonium (NH4) and sulfide (S) ions.Molar mass of (NH4)2S = (2 × Molar mass of NH4) + Molar mass of S= (2 × 14.01 g/mol) + 32.06 g/mol= 60.08 g/mol.

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Answer:

B

Explanation:

\(\frac{6.626\cdot10^{-34}\cdot\left(3\cdot10^{8}\right)}{589}\)= 3.37 x 10^-28 J

The volume of CO= 2.912 L

Given

Dehydration of 6 g of methanoic acid with H2SO4

Required

The volume of CO

Solution

Reaction

HCOOH  ⇒​  CO+H₂O

MW = 1.Ar C+2.Ar H+2.Ar O

MW = 1.12+2.1+2.16

MW= 46 g/mol

mol = mass : MW

mol = 6 g : 46 g/mol

mol = 0.13

From equation, mol ratio HCOOH  : CO, so mol CO = 0.13

Vm = 22.4 L

so for 0.13 mol :

= 0.13 x 22.4 L

= 2.912 L

The question that Kelsey asks is to identify a similarity between a tundra and desert biome is Which biomes have a large daily change in temperature?. The correct option is c.

A significant, naturally occurring community of plants and animals living in a forest or tundra.

Researchers can identify a biome by defining the range of temperatures, the kind of soil, and the amount of light and water that are distinctive to a location. These factors create niches for particular species.

Therefore, the correct option is c. Which biomes have a large daily change in temperature?

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If N2 was increased at constant pressure in a reaction at equilibrium the reaction will move to the right and will reduce the other reactant.

At the equilibrium state of a reaction we see that if you increase the concentration of reactants for instance in this case where the concentration of N2 was increased at constant pressure, the reaction will move to the right and in turn to reduce the amount of its composite reactant.

In conclusion, if the concentration of N2 was increased at constant pressure will reduce the other reactant, say H2 was reacting with it

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Answer:

So in this problem, were asked to calculate how much heat is required to raise the temperature of a certain amount of water from 25.52 degrees Celsius to 28.75 degree Celsius. So let's start with our equation that relates are variables que which is he is equal to mass proof. That is a rough em mass time specific heat times the change in temperature. So we're looking for heat and mass. We do not have mass, but we do have both the density and the volume of water. And so to find mass weaken knew our 50 milliliters that were given in the problems them times the density of water which is point nine 97 grams for one Miller Leader, Let me fix this night up here seven is well, that is our mess. Variable. We know just from looking at the table 6.1 in the chapter that the specific heat of water is four 0.184 Jules per gram killed in and finally we know that the change in temperature just gonna switch this down. Here is the final temperature 28 0.75 degrees Celsius minus our initial temperature, 25 0.52 degrees Celsius. And we can just plug this into a calculator really quickly. 28 2.75 I'm just going to start on this side of the equation. So the change in temperature is 3.23 degrees Celsius. Times are specific. Heat 4.184 and then times are mass, which is 50 times 500.997 And we get our final answer of 600 73 point.

The compound that is likely to have the lowest boiling point is d). CH4.

Boiling point is the temperature at which a liquid becomes a gas. It is determined by the strength of the intermolecular forces between the molecules of the compound. The stronger the intermolecular forces, the higher the boiling point.

In the case of the compounds listed, they are all alkanes, which are nonpolar and only have London dispersion forces between their molecules. London dispersion forces are the weakest type of intermolecular force, and their strength depends on the size of the molecule. The larger the molecule, the stronger the London dispersion forces and the higher the boiling point.

Since CH4 is the smallest molecule among the options, it will have the weakest London dispersion forces and the lowest boiling point.

Therefore, the answer is d). CH4.

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Answer:

The alkali metals (Li, Na, K, Rb, Cs, and Fr) are the most reactive metals in the periodic table – they all react vigorously or even explosively with cold water, resulting in the displacement of hydrogen.

Explanation:

The metal that reacted most vigorously when placed in the acid is sodium, as it is an alkali metal.

At standard temperature and pressure, all of the bright, soft, extremely reactive alkali metals rapidly shed their outermost electron to create cations with charge +1.

One of the most reactive metals is the alkali metal. They have greater atomic radii and low ionization energies, which contribute to this. They have an oxidation state of 1, and they frequently give electrons during reactions. These metals stand out for their supple texture and silvery hue.

The alkali metals (Li, Na, K, Rb, Cs, and Fr) are the most reactive metals in the periodic table – they all react vigorously or even explosively with cold water, resulting in the displacement of hydrogen.

Therefore, the correct option is d. sodium.

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The question is incomplete. Your most probably complete question is given below:

Oxygen

magnesium

iron

sodium

The mass (in grams) of calcium carbonate, CaCO₃ needed to form 3.45 liters of carbon dioxide, CO₂ is 15 grams

First, we shall obtain the mole of carbon dioxide, CO₂ formed. Details below:

PV = nRT

1 × 3.45 = n × 0.0821 × 273

Divide both sides by (0.0821 × 273)

n = 3.45 / (0.0821 × 273)

= 0.15 mole

Next, we shall obtain the mole of calcium carbonate, CaCO₃. Details below:

CaCO₃ -> CO₂ + CaO

From the balanced equation above,

1 mole of CO₂ were obtained from 1 mole of CaCO₃

Therefore,

0.15 mole of CO₂ will also be obtained from 0.15 mole of CaCO₃

Finally, we shall obtain the mass of calcium carbonate, CaCO₃ needed for the reaction. Details below:

Mass of CaCO₃ = Mole × molar mass

= 0.15 × 100

= 15 grams

Thus, the mass of calcium carbonate, CaCO₃ needed is 15 grams

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Answer:

What are the full directions?

Answer:

Flaming

Posting on a blog

ALL CAPS

Troll

;-)

Flamewar

LOL

Explanation:

Hope this helps. Have a nice day. May it be filled with joy and happiness. Please, stay safe and wash your hands. Happy Holidays.

Answer:

true

Explanation:

Answer:

its true

Explanation:

you know Aspirin is one of the Aesthetic Values of biodiversity is true

hope it help to you and goodluck next time

The fraction of the original amount remaining is closest to 1/128

n = t / t½

n = 28 / 4

n = 7

N = N₀ / 2ⁿ

N = 100 / 2⁷

N = 0.78125 g

Fraction remaining = N / N₀

Fraction remaining = 0.78125 / 100

Fraction remaining = 1/128

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The temperature at the top of an atmosphere consisting of an ideal gas with constant density can be found using the ideal gas law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

Assuming the density of the gas is constant throughout the atmosphere, we can express the pressure as P = ρgh, where ρ is the density, g is the acceleration due to gravity, and h is the height.

Since the atmosphere is homogeneous, the pressure at the top (P_top) is the same as the pressure at the bottom (P_bottom), so we have P_top = P_bottom = ρgh.

Using the ideal gas law, we can write ρghV = nRT, where V is the volume of the gas.

Assuming the volume of the gas is constant, we can cancel out V, and rearranging the equation, we get T_top = (nRT_bottom)/(nR) = T_bottom.

Therefore, the temperature at the top of the atmosphere would be the same as the temperature at the bottom.

In practice, however, it is not possible for an atmosphere to have constant density all the way to the top. As we go higher in the atmosphere, the density decreases due to decreasing pressure and temperature. This is because gravity becomes weaker at higher altitudes. Therefore, in reality, the temperature would decrease as we move higher in the atmosphere.

So, while a homogeneous atmosphere with constant density all the way to the top cannot exist in practice, it can be considered as an idealized scenario for understanding certain aspects of atmospheric behavior.

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The class of compounds known as chlorofluorocarbons (CFCs) are chemically inert, meaning they are not easily reactive with other substances. However, they can still pose an environmental problem, particularly in relation to the destruction of the ozone layer.

The issue with CFCs lies in their stability and their ability to reach the upper atmosphere. CFCs are extremely stable compounds, meaning they do not break down easily under normal conditions. When released into the atmosphere, they can persist for a long time without undergoing significant degradation. This stability allows them to gradually rise to the stratosphere, where the ozone layer is located.

Once in the stratosphere, CFCs can undergo photodissociation due to the absorption of ultraviolet (UV) radiation. This process releases chlorine atoms, which can then participate in catalytic reactions that destroy ozone molecules. Chlorine acts as a catalyst in the destruction of ozone, meaning it is not consumed in the process and can continue to deplete ozone molecules.

In summary, although CFCs are chemically inert, their stability and ability to reach the stratosphere enable them to cause ozone layer depletion. Once in the upper atmosphere, CFCs release chlorine atoms that act as catalysts in the destruction of ozone, leading to the environmental problem of ozone layer depletion. The stability of CFCs allows them to persist and continue to contribute to ozone depletion over extended periods of time.

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Answer:

A variable is anything that can change or be changed. In other words, it is any factor that can be manipulated, controlled for, or measured in an experiment.

Answer:

A) Chemical Change

Explanation:

Chemical changes occur when bonds are broken and formed between molecules or atoms. This means that one substance with a particular set of properties (such as melting point, color, taste, etc.) is turned into a different substance with different properties.

The equilibrium concentration of potassium ions within the mobile is greater than the attention of sodium ions out of doors the cell.

The amount of water out of doors the cellular compared to inside creates an osmotic gradient that enables the movement of water. In different words, when there are extra solutes out of doors the cell than in the mobile, water will move out of the mobile to balance the solute stages inside and a keto-kind carbonyl institution.

Keto manner the tautomer incorporates a carbonyl bond and enol way the presence of a double bond and a hydroxyl organization. the ratio of concentrations of the substances at the proper to the equilibrium concentrations of those at the left equals a consistent suitable for that precise reaction. word that the ratio is constantly written with the products over the reactants.

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