A chemistry graduate student is given of a acetic acid solution. Acetic acid is a weak acid with . What mass of should the student dissolve in the solution to turn it into a buffer with pH ? You may assume that the volume of the solution doesn't change when the is dissolved in it. Be sure your answer has a unit symbol, and round it to significant digits.

Answer:

Object 2 with a density of 0.68

Explanation:

object 2 has a lower density than water so it will float

Oxygen (O) has a higher first ionization energy than Nitrogen (N).

The first ionization energy is the energy required to remove one electron from an atom in its neutral state. The reason for Oxygen having a higher first ionization energy is that it has one more proton in its nucleus than Nitrogen. This means that the electrons in its outer shell are held more tightly due to the stronger electrostatic attraction between the positively charged nucleus and the negatively charged electrons.

Nitrogen has the electronic configuration of 1s² 2s² 2p³, which means that it has five electrons in its outermost shell. The first ionization energy of nitrogen is 1402.3 kJ/mol. On the other hand, Oxygen has the electronic configuration of 1s² 2s² 2p⁴, which means it has six electrons in its outermost shell. The extra electron in the outer shell of oxygen increases the electrostatic attraction between the positively charged nucleus and negatively charged electrons, making it more difficult to remove an electron from the atom. The first ionization energy of oxygen is 1313.9 kJ/mol, which is higher than that of nitrogen.

Therefore, Oxygen has a higher first ionization energy than Nitrogen due to its greater nuclear charge, resulting in stronger electrostatic attraction between its nucleus and outer electrons.

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Answer: THE ANSWER IS OZONE WEEEE a layer in the earth's stratosphere at an altitude of about 6.2 miles (10 km) containing a high concentration of ozone, which absorbs most of the ultraviolet radiation reaching the earth from the sun.

Explanation:

Answer: The answer is The Ozone layer

Answer:

10⁻³⁶ s

Explanation:

There is much speculation, but many scientists believe the universe started expanding about 10⁻³⁶ s  after the Big Bang.

Water vapor does contribute to the greenhouse effect, but it is not considered a primary greenhouse gas because it has a relatively short atmospheric lifetime compared to other gases such as carbon dioxide.

Additionally, the amount of water vapor in the atmosphere is largely controlled by temperature, meaning that as the atmosphere warms, more water vapor can evaporate and enter the atmosphere, but as it cools, water vapor can condense and return to the surface. Therefore, while anthropogenic emissions of water vapor do contribute to the overall concentration in the atmosphere, its impact on climate change is largely driven by other greenhouse gases.

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Answer:

pretty sure that's an old jolly rancher

Answer:

\(5850\ \text{cal}\)

Explanation:

m = Mass of water = 4500 g

c = Specific heat of water = \(1\ \text{cal/g}^{\circ}\text{C}\)

\(\Delta T\) = Change in temperature of water = \(1.3^{\circ}\text{C}\)

Heat is given by

\(q=mc\Delta T\\\Rightarrow q=4500\times 1\times 1.3\\\Rightarrow q=5850\ \text{cal}\)

A slice of the bread contains \(5850\ \text{cal}\).

Answer:

D

Explanation:

Hope this helps

Answer:

metaphase

Explanation:

the cells chromosomes line themselves in the middle of the cell through a type of cellular tug of war.

Answer:

metaphase

Explanation:

During metaphase, the cell's chromosomes align themselves in the middle of the cell through a type of cellular "tug of war." The chromosomes, which have been replicated and remain joined at a central point called the centromere, are called sister chromatids.

Answer:

2.3 grams per cubic cm

Explanation:

Density is equal to mass over volume, so

23/10=2.3

Answer:

\(\huge\color{cyan}{\colorbox{magenta}{Answer}}\)

thank you

Answer:

Nucleus and atoms have no overall charge because each element has the same number of protons and electrons which cancel out each other.

Answer:

isopropyl benzene (cumene)

Explanation:

The reaction of isopropyl chloride and AlCl3 and benzene belongs to the class of organic reactions known as the Friedel Kraft alkylation.

The mechanism of the reaction involves the formation of a tetrahedral complex [AlCl4]^-.

The electrophile now is the isopropyl group which attacks the benzene to yield the product.

A change in water temperature is likely to have a negative effect on reproduction in both organisms that live near a freshwater ecosystem.

Since both organisms are adapted to the water temperature of their environment, and any increase or decrease in temperature can cause their reproductive processes to be disrupted. For example, an increase in water temperature can cause an increase in the metabolic rate of the organisms, leading to a decrease in the amount of energy available for reproduction.

Also, an increase in water temperature can cause an increase in water evaporation, leading to a decrease in the amount of water available for the organisms, which can also negatively affect their reproductive processes.

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When warming temperatures gradually melt sea ice over time, fewer bright surfaces are available to reflect sunlight back into the atmosphere. More solar energy is absorbed at the surface and ocean temperatures rise. This begins a cycle of warming and melting. Warmer water temperatures delay ice growth in the fall and winter, and the ice melts faster the following spring, exposing dark ocean waters for a longer period the following summer.

Changes in the amount of sea ice can disrupt normal ocean circulation, thereby leading to changes in global climate. Even a small increase in temperature can lead to greater warming over time, making the polar regions the most sensitive areas to climate change on Earth.

Hope this helped

Peace ️

Since the question does not provide a balanced equation or any additional information, we cannot provide a specific answer. Nevertheless with the example we can see that for every one mole of magnesium, two moles of boron are required.

In general, to solve a stoichiometry problem, you would first write out the balanced chemical equation for the reaction of interest. Then, you would determine the stoichiometric ratios between the reactants and products, based on the coefficients in the balanced equation. Finally, you would use these ratios to convert the given amount of one reactant or product to the required amount of the other reactant or product.

For example, if the balanced equation were:

Mg + B2O3 → MgO + 2B

We can see that for every one mole of magnesium, two moles of boron are required. Using the molar mass of magnesium (24.31 g/mol), we could convert the desired 40.0 grams of boron to moles, and then use the stoichiometric ratio to determine the required mass of magnesium.

However, since the question does not provide a balanced equation or any additional information, we cannot provide a specific answer.

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The following organic molecules are isomers CH3CH₂CH₂CH3. Option A.

All organic compounds have isomers. Isomers mean that they have the same molecular formula but different configurations. The connectivity of a connection ultimately determines its functionality. For example, the same molecular formula can be used to identify alcohols or ethers.

Isomers are molecules that have the same molecular formula but differ in the arrangement of their atoms in space. This excludes all other configurations by rotating the molecule as a whole or around specific bonds. In organic chemistry, isomers are molecules that have the same molecular formula but differ in the structural or spatial arrangement of the atoms within the molecule.

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Answer:

20 g g/mL. 15.77

Explanation:

i think i answer it

When an ordered arrangement of particles extends over a long distance in a solid, the material is considered to be a crystalline solid.

Crystalline solids are characterized by a highly ordered arrangement of particles, which can extend over long distances in three dimensions, forming a regular repeating pattern known as a crystal lattice.

Crystalline solids have a well-defined melting point and a regular, geometric shape. They are also usually brittle and have a tendency to fracture along cleavage planes, which are planes of weakness in the crystal lattice.

Examples of crystalline solids include salt, diamond, and quartz. In contrast, materials with a disordered arrangement of particles are referred to as amorphous solids. Examples of amorphous solids include glass and rubber.

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Answer:74

Explanation:

Answer:

I believe Tungsten has 2 valence electrons.

Explanation:

Hope this helps!

Answer:

Homogeneous mixture is the answer for this

The label appears in the organic product and not in the water owing to the fact that water is eliminated as -OCH3 replaces -OH.

Isotopic labelling is one of the methods by which a chemical reaction is studied. In this case, we can see that the reaction occurs with the hemiacetal reacting with a labeled methanol.

By looking at the reaction products we can see that the label appears in the organic product and not in the water owing to the fact that water is eliminated as -OCH3 replaces -OH.

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Nuclear fission occurs when neutrons bombard fissile U-235 nuclides leading to its disintegration into smaller nuclides releasing more neutrons and energy.

The equation of nuclear fission is shown in the image attached to this answer. We can see that during nuclear fission, U-235 is bombarded with neutrons. It disintegrates as shown in the equation to yield more neutrons that continue the process.

This is why fission is referred to as a chain reaction. You do not need to supply more neutrons to continue the reaction. The neutrons required to continue the reaction are produced during the reaction.

However, it is necessary to control the rate of chain reactions using a control rods which absorb some neutrons so that  excess neutrons do not build up in the system thereby making the reaction to go out of control.

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The correct abbreviation for each metric unit is:

Kilogram - kg, Milliliter - ml, Kilometer- Km, Meter- m, Millimeter - mm, Centimeter - cm, Gram - g,  Liter - L, and Milligram - mg.

The metric system can be described as a system of measurement that succeeded the decimalized system based on the meter.  Each of the fundamental dimensions can be expressed by a single base unit of measure.

For quantities derived from the base units of the system, units derived from the base units are used such as the square meter being the derived unit for the area, a quantity derived from length.

Metric units can be described as units based on the meter, gram, or second and decimal multiples or sub-multiples of these. The units of the International System of Units (SI). By extension, they involve units of electromagnetism from the CGS units and SI units systems.

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Answer:

it is where the ozone layer is locate which is affected by human activities

The chemical formulas corresponding to given compounds are as follows:

(a) Potassium tris(oxalato)chromate(III) - K₃[Cr(C₂O₄)₃]

(b) Tris(ethylenediamine) cobalt(III) pentacyanoiodomanganate(II) - [Co(C₂H₈N₂)₃]₄[Mn(CN)₅I]₃

(c) Diamminediaquabromochloroaluminum nitrate - Al(H₂O)₂(NH₃)₂BrCl]NO₃

Chemical formulas are formulas that are used to represent chemical compounds.

Chemical formulas use the symbols of the elements present in the compound to represent the compound. The ratio in which the moles of atoms of elements combine in the compound is written as subscripts beside the element.

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S denotes the ''number of shared electron pairs by an atom'', Hence, Silicon shares its 4 electrons with 4 Cl-atoms. Thus the Value of S is 4 in SiCl₄ .It is also known as covalency

The number of covalent bonds that a particular atom can make with other atoms in forming a molecule.

Covalent bond id formed by the sharing of electron between two atoms.

Hence, Silicon shares its 4 electrons with 4 Cl-atoms. Thus the Value of S is 4 in SiCl₄ . It is also known as covalency

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The  map that would I bring with me as I navigate the wilderness is Topographic maps.

Because topographic maps use contour lines to indicate the geometry of landforms, they are excellent for wilderness navigation (mountains, valleys, ridges, saddles).

Reading topographic maps has somewhat lost some of its appeal with the development of reliable, accurate GPS devices and phone navigation apps.

However, no matter how sophisticated and costly your equipment is, it could still run out of batteries, malfunction due to excessive dampness, cease functioning in the cold (cough, iPhones), or fall off a cliff and smash.

Additionally, the satellite signal that your device requires to locate you will always decide to go out at the worst possible time.

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Answer:

Here is ur answer...

Explanation:

2) Half-filled d orbital increases the stability of the element.