the ph of polar oceans is than the tropics. select one: a. more basic b. more acidic c. about the same as

Answer:

2, 4, and 5

Explanation:

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Answer:

2, 4, and 5

Explanation:

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Genetic diversity is produced by sexual reproduction, which gives a population a variety of appearances. The following paragraph contains the necessary information regarding genetic diversity.

It is possible for organisms to adapt to changing environmental conditions and prevent inbreeding by maintaining significant genetic variety. When there are limited, isolated populations, inbreeding takes place, which might make a species less able to endure and procreate.

Genetic diversity is the range of different hereditary traits within a species. There would be several people with a wide range of diverse traits in such a species with significant genetic diversity. For a community to adapt to shifting surroundings, genetic variety is essential.

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Answer:

Any group larger than hydrogen is more stable at the equatorial position. Thus, option D is correct.

Explanation:

The equatorial bonds of cyclohexane are those that extend from the perimeter of the ring.

When groups are axial, the dispersion forces between them are repulsive and thus unstable. There is generally less repulsion when any group larger than hydrogen is equatorial rather than axial and thus more stable.

When one ring substituent group is larger than the other, the larger group equatorial will be more stable due to steric and spacial reasons.

Thus option D is correct which is tertiary and the largest group of all.

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Answer:

The cell grows into its full size

The cell copies it’s dna

Explanation:

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Answer:

539.76 moles of O₂

Explanation:

Equation of reaction:

4Al + 3O₂ → 2Al₂O₃

From the equation of reaction above, 4 moles of Al will react with 3 moles of O₂

We can use mole-concept to find the number of moles of O₂.

4 moles of Al = 3moles of O₂

719.68 moles of Al = x moles of O₂

X = (3 × 719.68) / 4

X = 2159.04 / 4

X = 539.76 moles

539.76 moles of O₂ will react with 719.68 moles of Al

Answer:

\(n_{O_2}=959.57molO_2\)

Explanation:

Hello,

In this case, given the reaction:

\(4Al (s) + 3O_2(g) \rightarrow 2Al_2O_3(s)\)

Since aluminum and oxygen are in a 4:3 molar ratio, we compute the moles of oxygen that completely react as shown below:

\(n_{O_2}=719.68molAl*\frac{3molO_2}{4molAl} \\\\n_{O_2}=959.57molO_2\)

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Answer:

Let’s get back to simple physics and the laws of motion. Your car and everything in it are traveling in a given direction, to stop in requires force be applied in the opposite direction over a period of time. This occurs extremely quickly in an accident and the force is greater because the time the opposing force is acting on the vehicle is very short. The airbag system is designed to offer you protection from the violent forces exerted on you during an accident.

There are three main components to your airbag system, the bag, the inflator and the sensor. The sensor must register a collision force roughly equal to hitting a brick wall at 10 to 15 mile per hour before it will trigger the airbag inflation. Once tripped the airbag system inflates through a chemical reaction between sodium azide (NaN3) and potassium nitrate (KNO3) which creates nitrogen gas. An igniter is set off which quickly burns the chemical fuel and creates the gas needed for expansion. The bag then blows out of its storage in a split-second. Immediately after inflation, when the chemical burn is complete, the airbag begins to deflate as the gasses escape from holes in the fabric.

Explanation:

Therefore, the estimated age of the piece of paper buried in the tomb, and approximately 75,817 years.

To estimate the age of the piece of paper buried in the tomb, we need to use the concept of radioactive decay. Carbon-14 is a radioactive isotope that decays over time into carbon-12. The ratio of carbon-14 to carbon-12 in living organisms is constant, but once the organism dies, the carbon-14 begins to decay, and the ratio changes.
The half-life of carbon-14 is approximately 5,700 years, which means that every 5,700 years, half of the carbon-14 in a sample will decay. Using this information, we can calculate the age of the piece of paper as follows:
r = (carbon-14/carbon-12) = 1/1311
Let's assume that the initial ratio of carbon-14 to carbon-12 in the paper was 1/1000 (which is close to the current ratio in the atmosphere).
After one half-life, the ratio would be 1/2000.
After two half-lives, the ratio would be 1/4000.
After three half-lives, the ratio would be 1/8000.
And so on.
We can use the following formula to calculate the age of the paper:
t = (ln r/ln 0.5) x 5,700 years
Plugging in the values, we get:
t = (ln 1/1311 / ln 0.5) x 5,700 years
t = (7.273 / 0.693) x 5,700 years
t = 75,817 years
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Answer:color change and formation of precipitate.

Explanation: The reaction of products of the chemical reaction may have different properties

The following is the net ionic equation for the given molecular equation: \(KCN(aq) + HI(aq) --> KI(aq) + HCN(aq)\)

The reaction equation for the given molecular equation is balanced. The dissociation of these compounds will yield the net ionic equation. Net ionic equation: \(HCN(aq) + H^+(aq) --> H_2O(l) + CN^-(aq)\)

This equation displays the actual form of HCN. HI is a strong electrolyte and completely ionizes to produce H+ and I- ions. On the other hand, HCN is a weak electrolyte that only partially ionizes to give H+ and CN- ions. The net ionic equation includes only the ions that contribute to the reaction. H+ and CN- ions are involved in the reaction, while K+, I-, and OH- ions are spectator ions.

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The regiochemistry of hydroboration/oxidation of alkenes is (a) Markovnikov.

The hydroboration/oxidation reaction follows Markovnikov's rule, which states that the electrophile (in this case, the boron atom) adds to the carbon atom of the double bond that has the greater number of hydrogen atoms attached to it. The regioselectivity of the reaction is determined by the relative stability of the carbocation intermediates formed during the reaction.

In hydroboration, the boron atom adds to the less substituted carbon atom of the double bond, leading to the formation of a boron-alkyl bond and a boron-hydrogen bond. Subsequently, in the oxidation step, the boron-alkyl bond is replaced with an alcohol group (-OH) while maintaining the regiochemistry established during hydroboration.

Therefore, the regiochemistry of hydroboration/oxidation of alkenes is Markovnikov, where the electrophilic addition occurs preferentially at the carbon atom of the double bond that has the greater number of hydrogen atoms attached to it.

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Answer:

a compound

Explanation:

To calculate the error in a standard solution of chemistry 14cl, you need to first measure the exact mass of the solution and subtract the amount you initially put in the solution. The result is the error.

For example, if you put 10 g of chemistry 14cl into a solution and measure the exact mass to be 10.4 g, the error would be 0.4 g.

To calculate the error in a standard solution in chemistry, you need to follow these steps:

1. Calculate the amount of substance you should have in your solution. This is typically given in the question, or you can calculate it using the formula n = cV, where n is the amount of substance, c is the concentration, and V is the volume.

2. Calculate the amount of substance you actually have in your solution. This can be done by weighing the solution and using the formula m = nM, where m is the mass, n is the amount of substance, and M is the molar mass.

3. Calculate the difference between the amount of substance you should have and the amount you actually have. This is the error in your solution.

4. Divide the error by the amount of substance you should have to get the percent error. This is typically reported as a percentage.

For example, if you were supposed to have 14cl of a substance in your solution, but you actually have 13.8cl, the error would be 0.2cl. The percent error would be (0.2/14) * 100 = 1.43%.

So, the error in a standard solution in chemistry can be calculated by finding the difference between the amount of substance you should have and the amount you actually have, and then dividing by the amount you should have to get the percent error.

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Answer:

Ca ( s ) calcium + 2 HCl ( aq ) hydrochloric acid → CaCl 2 ( s ) calcium chloride + H 2 ( g ) hydrogen .

Explanation:

Answer:

b

b

Explanation:

Answer:

118

Explanation:

The discovery of the 118 chemical element known to exist us of 2021

When one mole of Na3PO4.3H2O is heated extensively, three moles of water are released.

The water molecules in Na3PO4.3H2O are called molecules of water of crystallization. These molecules are not covalently bonded to the Na3PO4 molecule. They are only loosely attached to the substance.

Strong heating will drive away these molecules of water of crystallization to give three moles of water in the product.

Hence, when one mole of Na3PO4.3H2O is heated extensively, three moles of water are released.

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Answer:

The same genes or slightly different versions of the same gene can be found on each chromosome in a pair. They form a line and split off bits of themselves, which they barter with one another. In sexual reproduction, crossing over is the first method that genes are shuffled to develop genetic variation.

Answer:

It's already balanced.

Explanation:

REACTANTS PRODUCTS

H = 2 H =2

S = 1 S = 1

O = 7 O = 7

Ca = 1 Ca = 1

C = 1 C =1

The false statement is applied pressure only refers to atmospheric pressure and the correct option is option 1.

It is the ratio of the force applied to the surface area over which the force is applied. Pressure can be defined as the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Atmospheric pressure is the pressure exerted by the atmosphere on the earth.

Thus applied pressure not only represents atmospheric pressure.

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The radiations that can emit electromagnetic energy with shorter wavelengths are these ones. Because metal surfaces reflect microwaves, Occurrences including refraction, diffraction, reflection, and interference have an impact on the transmission of microwaves.

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Answer:

Atoms of the same element may have different mass numbers.

Explanation:

Mass number is the number of protons + the number of neutrons in an atom. Atoms of the same element can have different number of protons, and hence different mass numbers.

Atoms of the same element with different numbers of protons (but same numbers of neutrons) are called isotopes.

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The solution with the lowest solubility of Zn(OH)2 is 1 M Zn(NO3)2 due to the presence of a high concentration of Zn2+ ions causing a common ion effect.

The solubility of Zn(OH)2 would be lowest in a solution with a high concentration of a common ion that can react with the Zn(OH)2 and shift the equilibrium towards the formation of the insoluble compound. Among the given options, the solution with the lowest solubility of Zn(OH)2 would be 1 M Zn(NO3)2.

When Zn(NO3)2 is dissolved in water, it dissociates to form Zn2+ and NO3- ions. The presence of a high concentration of Zn2+ ions in the solution creates a common ion effect, which reduces the solubility of Zn(OH)2. According to Le Chatelier's principle, the equilibrium is shifted in the direction that reduces the concentration of the common ion, in this case, Zn2+ ions. As a result, the solubility of Zn(OH)2 is decreased.

In contrast, solutions such as 1 M HCl, 1 M NaOH, pure water, and 1 M NH3 do not contain a high concentration of Zn2+ ions or any other common ions that can significantly affect the solubility of Zn(OH)2. Therefore, the solubility of Zn(OH)2 would be lowest in 1 M Zn(NO3)2 solution due to the common ion effect.

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ANSWER

Temperature

EXPLANATION:

From the question given, we were told that a scientist heated 100mL solution and measured its volume as it became warmer.

To determine the heat of the solution, we need to measure the temperature of that solution. Temperature is the degree of hotness or coldness of a substance. It can also be defined as the degree of internal heat.

So, measuring the temperature of the solution will tell us the amount of heat present in that solution

When the keto group in 9-fluorenone absorbs light, it releases energy in the visible region because the light's wavelength changes, giving the impression of color. Due to a lack of π-π* bonding electrons, the alcohol group in 9-fluorenone does not absorb light in the visible spectrum and is hence colorless.

Drugs that treat malaria are created using it. With the addition of glacial acetic acid and sodium hypochlorite solution and an oxidation process, it can be made from fluorenol. It is solid at room temperature and has a vivid neon yellow color.

In a semi-rural neighborhood of Portland, Oregon, during a series of four rainstorms in March and April 1982, fluorenone was detected in rainwater at an average concentration of 15 ng/L. (1).

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Answer:

The answer is "beryllium-10".

Explanation:

In the given diagram, it displays the atom contains four protons, five neutrons, and two electrons of valence.  

The number of atoms was its number of protons, which is the characteristic of a chemical compound, beryllium (be) is now the atomic component number 4.

The Two electrons of valence imply the atom is 2 and in the  Periodic table group of beryllium; boron (13) and carbon (14) are only of that group.

Beryllium-10 is 6-neutron (different pattern of neutrons, mass number, etc.) and therefore it is an isotope.

Answer:

It is petroleum-derived product comprising a mixture of liquid aliphatic and aromatic hydrocarbons, ranging between C4 and C12 carbon atoms with the boiling range of 30–225°C

Explanation:

Gasoline is a mixture of paraffins, naphthenes, aromatics and olefins.

Answer:

120 g is the answer I think