Copying is not allowed. You must show all work in order to receive credit. Naturally occurring silver has two isotopes. Isotope A has a relative mass of 106.9051 and an abundance of 51.82%. Isotope B has a relative mass of 108.9047. Calculate the atomic mass of silver from these data.

So if density of water is increased it can flow some less denser things that it cannot before.

So it turns vice-versa

Answer: State of matter, Subcategory in the metal-metalloid-nonmetal trend, and electrons per shell.

Explanation:

Answer: 21.90 grams HCl  ; 22 g HCl if need correct sig figs

Explanation:

moles = M X L  = 1.5 x .40 =0.60 moles HCl

convert to grams

0.60 X 36.5 = 21.90

Answer:

\(\boxed {\tt A \ marble \ is \ small}\)

Explanation:

A marble is not a very large object, so a smaller graduated cylinder is a better choice.  A 100 milliliter graduated cylinder is not needed to measure the volume of a small marble, so a 25 milliliter graduated cylinder is the best option.

Answer:

B

Explanation:

placenta comes after baby

Answer:

Kinetic energy makes it have a higher bond in temperature

Explanation:

Answer:

What are quantum numbers? a set of four numbers that completely describe the location and the energy for each electron.

Quantum numbers are set of numbers that describe position and energy of  every electron present in an atom.

Quantum numbers are the numbers which describe the values of conserved quantities with respect to the dynamics of a quantum system.They correspond to the Eigen values of operators which commute with the Hamiltonian quantities.

The Hamiltonian quantities can be known with precision simultaneously with the system's energy.Quantum numbers can take values of discrete sets of integers or even half-integers even though they can approach infinity in some cases.

They can specifically describe energy levels of electrons, and can also explain angular momentum,spin,etc.These are used to describe the path of an electron in an atom ,when the quantum numbers of all atoms are combined they must comply with the Schrodinger equation.

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The structure for 2-methyl-3-propalhex-2-yne can be shown in the image attached.

We know that a compound is composed of atoms that can be found in the compound. For the organic compound, we can see that we can be able to obtain the structure of the compound from the structure.

The compound as we can see is  2-methyl-3-propalhex-2-yne. The structure of the compound must be able to include a double bond as we can clearly see from the image that is attached to this answer.

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KH2PO4 is a more suitable choice as a buffer because it has a greater buffering capacity due to the presence of the weak acid and its conjugate base.

KHPo4 is not considered an effective buffer compared to KH2PO4 due to its limited buffering capacity. The effectiveness of a buffer is determined by the concentration and dissociation properties of its conjugate acid-base pair.

KH2PO4 is a salt composed of the weak acid H2PO4- and its conjugate base HPO4^2-. In an aqueous solution, KH2PO4 can dissociate to release H+ ions from the H2PO4- component, which acts as a weak acid, and the HPO4^2- component can accept H+ ions, acting as a weak base. This allows KH2PO4 to effectively resist changes in pH when small amounts of acid or base are added to the solution.

On the other hand, KHPo4 consists of the strong acid H3PO4 and the weak base HPO4^2-. H3PO4 fully dissociates in water, providing a large concentration of H+ ions, making it difficult for the HPO4^2- to effectively act as a base and maintain pH stability.

Therefore, KH2PO4 is a more suitable choice as a buffer because it has a greater buffering capacity due to the presence of the weak acid and its conjugate base.

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The half reaction with a more positive standard reduction potential will proceed spontaneously in a redox reaction

The half reaction with a more positive standard reduction potential will undergo reduction when compared to the half reaction with a more negative standard reduction potential.

Oxidation-reduction reactions, often known as redox reactions, are a set of chemical reactions that involve electron transfer between reactants. In a redox reaction, one reactant is oxidized, losing electrons, while the other reactant is reduced, gaining electrons.

The oxidation half-reaction is the process of losing electrons and increasing the oxidation number, whereas the reduction half-reaction is the process of gaining electrons and decreasing the oxidation number. The total reaction is referred to as the redox reaction.

Half-reaction:Half-reaction refers to the two parts of an oxidation-reduction reaction that happen separately. A half-reaction must always be either an oxidation reaction or a reduction reaction. It also describes the movement of electrons and hydrogen ions in an equation.

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Explanation:

resistivity is the reciprocal of cell constant

When 0.20 of nicotinic acid is dissolved in 350 ml of water, the ph is 3.05. calculate the Ka value Ka=1.41ₓ10⁻⁵ and percent ionization is 14.1%

One of the water-soluble B vitamins is niacin, sometimes referred to as vitamin B3. Nicotinic acid (pyridine-3-carboxylic acid), nicotinamide (niacinamide or pyridine-3-carboxamide), and similar compounds, such as nicotinamide riboside, are collectively referred to as "niacin."

pH = 3.05

pH=-log[H⁺]

H⁺=10⁻³·⁰⁵

H⁺=0.00089125M

Moles of nicotinic acid in number =2.0ₓ10⁻²

Water volume = 350 mL = 0.0350 L

percent ionization=1.41/100

                               14.1%

A potent basic substance is nicotinic acid (based on its pKa). From microbes to people, all living things have nicotinic acid.

Molarity =Moles/Volume in Liters

             =2.0ₓ10⁻²/0.0350

Molarity = 0.057214M

Nicotinic acid dissocates as follows:

HA⇒[H⁺]+[A⁻]

[H⁺]=0.00089125M

[A⁻]=0.057214M

At equilibrium, [HA] = 0.05714 - 0.00089125 = 0.05624875 M

Ka=[H⁺][A⁻]/[HA]

Ka=(ₓ0.00089125M)(0.057214M)/0.05624875 M

Ka=1.41ₓ10⁻⁵

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Starch is made of units of and it is broken down by an enzyme called amylase.(c)

Starch is a polysaccharide made up of glucose units, which are broken down into simpler glucose molecules by the enzyme amylase. Amylase is secreted by the salivary glands and pancreas, and it breaks down starch into smaller molecules that can be absorbed by the body.

This process of breaking down starch into glucose is crucial for energy production in the body, and it is also important for regulating blood sugar levels. In summary, starch is broken down by amylase into glucose, which is then used by the body for energy.

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0.342 x \(10^(^1^6^)\))  photons are required to emit 1 joule of energy.

A photon is a particle of light defined as a discrete bundle (or quantum) of electromagnetic (or light) energy.

We need to find the number of photons emitted per second.

So we have E = hc ÷ λ

= (6.6 x \(10^-(^3^4^)\)x 3 x \(10^8\) m/s) ÷ 6.78 x \(10^(^-^7^)\)nm

= 2.92 x \(10^(^-^1^9^)\)Joules

Now number of photons per second = I / E (I = intensity)

= 1 x \(10^(^-^3^)\) joule / sec ÷ 2.92 x \(10^(^-^1^9^)\)joule

= 0.342 x\(10^(^1^6^)\)

Hence, 0.342 x \(10^(^1^6^)\))  photons are required to emit 1 joule of energy.

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When burning magnesium is lowered in a gas jar full of carbon dioxide, the burning process continues because the carbon dioxide acts as an oxidizing agent.

A combustion reaction is a type of chemical reaction that occurs when a fuel, such as a hydrocarbon, reacts with an oxidizing agent, such as oxygen, to produce heat and light in the form of a flame. The basic equation for a combustion reaction is:

Fuel + Oxidant → Heat + Light + Products

In the case of burning magnesium, the fuel is magnesium and the oxidant is carbon dioxide. The products of the reaction are magnesium oxide and carbon dioxide. Combustion reactions are exothermic, meaning they release energy in the form of heat.

This means that the carbon dioxide provides the oxygen necessary for the combustion reaction to continue, allowing the magnesium to continue burning. Additionally, the carbon dioxide also helps to extinguish the flame by removing the heat and the oxygen from the combustion zone.

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Answer:

Work: 392400 J Power developer: 19620

Answer:

The three components of a chemical formula are the empirical formula, the molecular formula, and the structural formula.Hope this answer helps.

Answer:

416.876

Explanation:

Uhmm I am so so very sorry if this is incorrect

Answer:

only god knows

Explanation:

Answer:

Number of moles =20

Number of molecules present = 20 multipled by avogadro's number.

The termination of translation requires stop codon on the mRNA

When a stop codon accesses the A site of the ribosome, mRNA translation is terminated. In eukaryotes, this process is controlled by the release factors eRF1 and eRF3, which form a ternary eRF1/eRF3-guanosine triphosphate (GTP) complex.

For quick and effective cessation of translation in eukaryotes, GTP hydrolysis, which is mediated in the ribosome by a complex of two polypeptide release factors, eRF1 and eRF3, is necessary.

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250 L of 5.0% w/v glucose solution can be prepared using 125 g of glucose.

w/v = [ mass of solute (g) / volume of solution (mL) ] × 100

5.0 % w/v = [ 125 g / volume of solution (mL) ] × 100

volume of solution (mL) = [ 125 g / 5.0 % w/v ] x 100

volume of solution (mL) = [ 125 g / (5.0 / 100) ] x 100

volume of solution (mL) = [ 125 g / 0.05 ] x 100

Answer:

Ba(NO₃)₂(s) ⇒ BaO(s) + N₂(g) + 3 O₂(g)

Explanation:

Let's consider the unbalanced equation for the decomposition reaction of solid barium nitrate.

Ba(NO₃)₂(s) ⇒ BaO(s) + N₂(g) + O₂(g)

We can see that Ba atoms and N atoms are balanced, but we have 6 O atoms to the left side and 2 O atoms to the right. We can get the balanced equation by multiplying O₂(g) by 3.

Ba(NO₃)₂(s) ⇒ BaO(s) + N₂(g) + 3 O₂(g)

Answer: Potential Energy

Explanation:

Chemical energy is stored energy in between bonds. Any energy that is stored and therefore has to be released is potential energy.

Answer:ionic bond

Lithium becomes +ve while FL becomes-ve

Explanation:bond btwn a metal and a none metal is called an ionic bond

Li loses one therefore it's+ve FL gains becoming -ve

1. Earthquakes and Eruptions (volcanoes)

2. Divergent plate boundary

3. Apart from a widening valley, it equally contributes to steep mountain sides spreading. A mid-oceanic ridge is naturally produced if two oceanic plates naturally start moving away from each other.

1. When a divergent boundary occurs beneath oceanic lithosphere, the rising convection current below lifts the lithosphere, producing a mid-ocean ridge. Extensional forces stretch the lithosphere and produce a deep fissure. When the fissure opens, pressure is reduced on the super-heated mantle material below. It responds by melting, and the new magma flows into the fissure. The magma then solidifies and the process repeats itself.

2. When two plate diverge from each other also known as divergent (di-apart, vergere- to inclined) plate margin .

Two plate diverge along oceanic ridges where new lithosphere is created.

Now come to the main point: Geological Features

When two oceanic plate diverge then new sea floor is created by a process called sea floor spreading and features like Mid oceanic ridges, volcanoes & Young lava flows forms. Ex. East Pacific Rise, Mid-Adlantic Ridge.

When two continental plates diverge by continental rifting then features like Rift valley, volcanoes are found. Ex of continent continent -East Africa rift vally, Red sea.

3. The major difference between different types is what type of plate the divergent boundary is between. If the boundary is found between two continental plates you are left with a rift valley. ... If two oceanic plates begin moving away from each other it creates a mid-oceanic ridge.

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Answer:

don't knoe sorry

Explanation: