A lead fishing weight of 39.7g is submerged in a graduated cylinder of water containing 75.0mL of water. The water level will increase to what volume in the cylinder?

False. The chemical activity known as photosynthesis does not support the complete food chain on Earth. Plants and certain microorganisms employ a process called photosynthesis to transform solar energy into chemical energy, which is subsequently used to create sugars, the plant's primary source of nutrition.

Since this process creates oxygen, which is necessary for the majority of life forms, it is significant for the environment's health. However, other mechanisms that certain microorganisms and some animals utilise, such chemosynthesis and carnivory, also contribute to maintaining the food chain.

Additionally, photosynthesis is not the only process that transfers energy via the food chain. Sunlight provides energy to plants via the mechanisms through the microorganisms.

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The average kinetic energy of colliding particles can be increased by increasing temperature.

B.

Answer:

B

Explanation:

Increasing the Temperature

The cuvette was wet and not properly rinsed before you analyzed your sample, it could affect the equilibrium constant you would be reporting for that sample. This is because the remaining water or any other residue in the cuvette could dilute the sample or introduce contaminants, causing inaccuracies in your measurements.

Here's a step-by-step explanation of how this could impact the equilibrium constant When the cuvette is not properly rinsed, any remaining water or residue could mix with your sample, altering its concentration. This change in concentration can affect the absorbance values that you measure during your analysis. Since the equilibrium constant is calculated based on the concentrations of the reactants and products at equilibrium, any change in concentration due to an improperly rinsed cuvette can lead to an incorrect equilibrium constant. As a result, the reported equilibrium constant for that sample would not accurately represent the true equilibrium constant for the reaction. To avoid this issue, it's important to always ensure that the cuvette is properly rinsed and dried before analyzing a sample.

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Sugar is a simple carbohydrate consisting of carbon, oxygen, and hydrogen molecules which are linked by covalent bonds.

The chemical covalent bonds are a type of chemical bond in which atoms that differ in their electronegativity share electrons to maintain cohesion i.e., intramolecular cohesion, while sugar molecules may interact by glycosidic bonds.

Therefore, with this data, we can see covalent bonds bind atoms in the sugar molecule while glycosidic bonds are those required to connect different sugar and thus form a complex macromolecule or polysaccharide.

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The product formed in the reaction of 2−methyl−1−butene with bromine in water will be 1-bromo-2-methylbutan-2-ol (Structure attached)

A reaction mechanism is a representation of step by step transfer of electrons and molecules from one compound to another compound. In reaction mechanisms, the curved arrows show the moment of electrons.

In the reaction mechanism of 2-methylbut-1-ene the double bond of 2-methylbut-1-ene act as an attacking group and attacks Br₂. As a result, one Br atom gets attached to 2-methylbut-1-ene. This results in a cyclic brominium ion generation, which makes the neighboring carbon more substituted. Water molecule then attacks on the more substituted carbon and 1-bromo-2-methylbutan-2-ol will generate as the major product.

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Answer:

decrease

Explanation:

Answer:

D. Zn²⁺ + 2Ag → Zn + 2Ag⁺

Explanation:

On the reduction potential chart, we have that silver ion Ag⁺ is a stronger oxidizing agent than, zinc, Zn, which is a reducing reducing agent the compared to silver

Therefore, the redox reaction that will occur is that the zinc, Zn, will be oxidized to Zn²⁺ ion, while the silver, Ag²⁺ ion will be reduced to silver deposits Ag, therefore, the zinc will displace the silver in the solution containing silver and zinc ions because zinc is higher than silver in the reactivity series

The reduction potential Zn → Zn²⁺ + 2e⁻ = +0.76

The reduction potential for Ag⁺ + e⁻ → Ag = +0.8

Therefore, given that redox reactions are reversible, we get the following likely redux reaction;

Zn(s) + 2Ag⁺(aq) ⇄ 2Ag(s) + Zn²⁺(aq)

Therefore, from the given options;

Zn²⁺(aq) + 2Ag(s) → Zn(s) + 2Ag⁺(aq) is the reaction most likely to occur.

A magnet that is positively charged on one end and negatively charged on the other end is an example of D. polarity

Polarity is a property possessed by molecules in which there is a separation of electrical charges within the same molecule. On one side it will have a positive property and on the other side it will have a negative property. This property is what gives the possibility of being able to have other properties such as solubility, melting point or intermolecular forces.

This is because the poles between the different molecules are going to attract each other, the positive poles with the negative ones and the negative poles with the positive ones. So a good example of polarity is a magnet that is positively charged on one side and negatively on the other.

Therefore, we can confirm that a magnet that is positively charged on one end and negatively charged on the other end is an example of D. polarity.

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Answer:

ok

Explanation:

do you still need the answer sorry

Answer:

b

Explanation:

Beryllium is under Group 2, and group 2 are usually known as alkaline earth metals.

A brittle white crystalline solid  reacts with when added to water is Quartz. It is a metamorphic solid.

Quartz is the most abundant silica mineral. Pure Quartz is colorless and transparent. It occurs in most igneous and practically all metamorphic and sedimentary rocks. It is used as a component of numerous industrial materials. Silicon (Si) has the atomic number 14 and is closely related to carbon. It is a relatively inert metalloid. Silicon is often used for microchips, glass, cement, and pottery. Silica is the most abundant mineral found in the crust of the earth. One of the most common uses of silica quarts is the manufacturer of glass. Quartz is the second most abundant mineral in the Earth's crust. Its chemical name is SiO2.

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Answer:

Explanation:

If the particle has a velocity of 4 m/s initially (at t=0) and has a constant acceleration of 2 m/s2, find the velocity of the particle: when t=1; when t=2; after t seconds.

The average acceleration of the car starting with a starting velocity of 0 meters/second and accelerating up to 9 meters/second in 3 seconds would be 3 meters/second².

There are three equations of motion given by  Newton

The first equation is given as follows

v = u + at

the second equation is given as follows

S = ut + 1/2×a×t²

the third equation is given as follows

v² - u² = 2×a×s

As given in the problem we have to find the average acceleration of the car starting with a starting velocity of 0 meters/second and accelerating up to 9 meters/second in 3 seconds,

By using the first equation of motion

v = u + at

By substituting the value of velocities and time period in the first equation of motion,

9 = 0 + 3a

3a = 9

a = 9/3

a = 3 meters/second²

Thus, the acceleration of the car would be 3 meters/second².

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Crossing your arms across the chest and pulling the knees up to your chest is how the HELP position is achieved.

This is referred to as heat escape lessening position and reduces heat loss in individuals when in cold water.

This position helps to protect groin, head/neck, and rib cage/armpits areas of the body.

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Answer:

It would be 95.3

Explanation:

There is no element that is exclusively found only in the human body. Elements found in the human body are also present in various forms throughout the Earth's crust, atmosphere, and other living organisms. However, there are elements that are essential for human life and play crucial roles in our body's biological processes.

Some key elements found in the human body include oxygen (O), carbon (C), hydrogen (H), and nitrogen (N). These elements make up a large percentage of our body's composition and are the building blocks for molecules like proteins, carbohydrates, and lipids. Other essential elements, such as calcium (Ca), phosphorus (P), potassium (K), sulfur (S), sodium (Na), chlorine (Cl), and magnesium (Mg) also play vital roles in maintaining our health and ensuring proper functioning of our cells.

In summary, while there isn't an element that is solely found in the human body, there are several elements that are crucial for our body's proper functioning and overall health. These elements can be found in various forms and quantities throughout the Earth and other living organisms as well.

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Answer:

the third one

Explanation:

Answer:

sodium

Explanation:

Sodium (Na), Magnesium (Mg) and Potassium (K) are three elements that have 1 valence electron.

Elements with 1 valence electron such as Sodium (Na), Magnesium (Mg), and Potassium (K) belong to the alkali metal and alkaline earth metal groups of the periodic table.

Valence electrons are the electrons present in the outermost shell of an atom and are responsible for the element's chemical behavior. These elements readily donate their single valence electron to form positive ions with a charge of +1 enabling them to engage in various chemical reactions and bond with other elements.

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Answer:

option d

Explanation:

isotope means atoms with different mass no. 17 and 18 written on the left represent mass number

this is because atoms can differ in mass no.

The reaction you provided is a combination of an oxidation-reduction (redox) reaction and an acid-base reaction. The oxidation-reduction component of the reaction is the conversion of As(III) to As(V) and the conversion of NO3- (nitrate) to NO (nitric oxide). The acid-base component of the reaction is the conversion of H+ (hydrogen ions) to H2O (water).

Here is the step-by-step oxidation-reduction reaction:

As(III) (arsenite) is oxidized to As(V) (arsenate) by losing electrons:

As(III) → As(V) + 3e-

NO3- (nitrate) is reduced to NO (nitric oxide) by gaining electrons:

NO3- + 4H+ + 4e- → NO + 2H2O

The electrons lost by As(III) are gained by NO3-:

As(III) + NO3- → As(V) + NO + 2H2O

The acid-base component of the reaction is the conversion of H+ (hydrogen ions) to H2O (water) by reacting with the water generated by the oxidation-reduction reaction:

2H+ + 2H2O → 4H+

The overall balanced equation of this redox reaction is:

As₂O3 + H+ + NO3- → H₂ASO4 + NO

Please note that As₂O₃ is Arsenic trioxide and H₂ASO₄ is Arsenic Acid and NO is Nitric oxide.

Answer:

See explanation

Explanation:

Calcium carbide reacts with water to yield acetylene gas and calcium hydroxide as follows;

CaC2(s)+2H2O(g)⇋Ca(OH)2(s)+C2H2(g)

This now shows us that the equation as written in the question is wrong. Since the equation for the reaction of calcium carbide and water as shown in the question is wrong, the equation can not be balanced.

At constant temperatures, the simplest approach to reduce the volume of a gas is to raise its pressure. So, at 700 bar, or 700 times normal atmospheric pressure, hydrogen has a density of 42 kg/m3, compared to 0.090 kg/m3 at normal pressure and temperature.

Hydrogen decreases metal oxides in the reactivity series below. That is, hydrogen can only decrease the oxides of metals that are less reactive than hydrogen itself.

High-Temperature Water Splitting: Chemical processes that split water to make hydrogen are fueled by high temperatures generated by solar concentrators or nuclear reactors.

The oxidation number of hydrogen gas is 0, but the oxidation state of hydrogen atoms in water is +1. As a result, the hydrogen atom has been oxidized. It acts as a reducing agent.

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Answer:

Multiply the density by the volume

Since density is at g/mL you don't need to convert volume into L and just multiply it as mL

7.86g/mL x 6.5mL = 51.09g

Therefore the mass of the substance is 51.09g

In many cases, the Coase theorem does not work well because c. transaction costs are too high. The Coase theorem suggests that in the absence of transaction costs, parties can negotiate and reach an efficient outcome regardless of the initial allocation of property rights.

However, in reality, transaction costs such as bargaining costs, information costs, and enforcement costs can significantly hinder the ability of parties to negotiate and reach mutually beneficial agreements.

When transaction costs are high, it becomes difficult for parties to gather and exchange information, engage in effective negotiations, and enforce agreements. These costs can include the time and resources required for communication, legal representation, monitoring, and enforcement. High transaction costs can discourage parties from engaging in negotiations or make it economically infeasible to reach an efficient outcome.

Therefore, despite the theoretical possibility of the Coase theorem, transaction costs often present practical barriers to efficient bargaining and prevent the theorem from working effectively in real-world situations.

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In order to create a 0.600 M solution with a 200.0 mL volume, 8.89 grammes of Ca(OH)₂ are required.

To calculate the amount of Ca(OH)₂ needed, we'll use the formula:

Amount (in moles) = Concentration (in M) × Volume (in L)

First, convert the volume from milliliters to liters:

200.0 mL = 200.0 mL × (1 L / 1000 mL) = 0.200 L

Next, substitute the given values into the formula:

Amount (in moles) = 0.600 M × 0.200 L = 0.120 moles

Now, calculate the molar mass of Ca(OH)₂:

Ca: 40.08 g/mol

O: 16.00 g/mol (2 atoms)

H: 1.01 g/mol (2 atoms)

Molar mass of Ca(OH)₂ = 40.08 g/mol + 16.00 g/mol × 2 + 1.01 g/mol × 2 = 74.09 g/mol

Finally, calculate the mass of Ca(OH)₂ needed:

Mass = Amount (in moles) × Molar mass = 0.120 moles × 74.09 g/mol = 8.89 grams

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Answer:

C

Explanation:

Weak acids dissociate only slightly in an aqueous solution. The majority of molecules remain undissociated.

Answer:

The number of proton of magnisium = 12

Answer:

True

Explanation:

Generally makes sense.