Carbon-14 has a half life of 5600 years. if you had a sample of 100arbon-14, how much would still be carbon-14 after 33,600 years?

Answer:

These metals are less reactive than the neighbouring alkali metal. Magnesium is less active than sodium; calcium is less active than potassium; and so on. These metals become more active as we go down the column.

Explanation:

Magnesium is more active than beryllium; calcium is more active than magnesium; and so on.

The reactant 2-methylpropanoic acid is unlikely to produce the indicated product (2-methylpropanoic acid) upon strong heating because it is already in the form of the desired product and does not undergo significant chemical changes under those conditions.

To determine which reactant is unlikely to produce the indicated product upon strong heating, we need to consider the chemical properties and potential reactions of the reactants.

Reactant: 2,2-dimethylpropanedioic acid

Product: 2-methylpropanoic acid

Upon strong heating, 2,2-dimethylpropanedioic acid can undergo a decarboxylation reaction, where it loses a CO2 molecule and forms 2-methylpropanoic acid as the product. This reaction involves the removal of a carboxyl group (-COOH) from the reactant.

On the other hand, 2-methylpropanoic acid is already a carboxylic acid, and it does not possess a carboxyl group that can be removed by decarboxylation. Therefore, it will not undergo a decarboxylation reaction upon strong heating.

Considering this information, the reactant 2-methylpropanoic acid is unlikely to produce the indicated product (2-methylpropanoic acid) upon strong heating because it is already in the form of the desired product and does not contain a removable carboxyl group.

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The formula for the compound formed between rubidium (Rb) and sulfur (S) is Rb2S. So, the correct answer is C) Rb2S.

This is because rubidium has a +1 charge, and sulfur has a -2 charge. To balance the charges, you need two rubidium atoms for every sulfur atom. So, the correct answer is C) Rb2S.

Chemical compounds are formed when elements combine with each other by exchanging or sharing electrons.

In the case of rubidium and sulfur, rubidium is an alkali metal that readily loses its single valence electron to achieve a stable electron configuration, and sulfur is a non-metal that tends to gain two electrons to form a stable octet.

When rubidium (Rb) reacts with sulfur (S), the electron transfer results in the formation of an ionic compound, where rubidium forms a cation (+1 charge) and sulfur forms an anion (-2 charge).

To balance the charges in the compound, the number of cations and anions must be equal, and the total positive charge must equal the total negative charge.

In this case, since rubidium has a +1 charge and sulfur has a -2 charge, two rubidium atoms are required to balance the charge of one sulfur atom. Therefore, the correct formula for the compound formed between rubidium and sulfur is Rb2S, as it contains two Rb+ ions for every S2- ion.

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Explanation:

the ground state of zinc is

Ar3d¹⁰4s²

thus it has no unpaired electrons

Intermolecular force is the force acting between two different molecules. There are various kinds of intermolecular forces and the they differ in their strength.

Intermolecular forces are force of attraction or repulsion acting between two different molecules in a compound. The like charges of molecules repels and unlike charges will attracts together.

There are different kinds of intermolecular forces such as hydrogen bonding, Van der Waal's forces, dipole, dipole forces, London dispersion forces etc.

The strength of these forces vary from each other. The intermolecular force of attraction holds tow molecules together in a compound. Hence, option D is correct.

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Answer:

The mass number is defined as the total number of protons and neutrons in an atom. Consider Table below which shows data from the first six elements of the periodic table. Consider the element helium. Its atomic number is 2, so it has two protons in its nucleus.

Explanation:

Answer:

Explanation:

The mass of silver that would occupy a volume of 24 cm³ can be calculated using the density formula:

mass = density x volume

At 20 °C, the density of silver is 10.5 g/cm³, so the mass of silver that would occupy a volume of 24 cm³ would be:

mass = 10.5 g/cm³ x 24 cm³ = 252 g

So, the mass of silver that would occupy a volume of 24 cm³ is 252 grams.

The chemical molecule (C6H5)2CO, also referred to as Ph2CO, is benzophenone. The solid is white and dissolves in organic solvents.

Some flowering plants contain benzophenone-3 (BP-3), a substance that occurs naturally. The sun's dangerous ultraviolet (UV) rays are absorbed and scattered by BP-3. It is created to be used as sunblock in lotions, shampoos, and cosmetics for this reason.

Organ System Toxicology Because that including can cause liver enlargement in rats at lower doses, it (Environmental protection agency) lists it as a recognized toxicant. Oxybenzone can penetrate the skin, build up in the blood, kidneys, and liver, and could be harmful to liver cells.

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The correct answer is

what is  the structure of benzophenone ?

The total pressure inside the container is 1.167 atm.

According to Dalton's law of partial pressures, the total pressure of a mixture of gases is equal to the sum of the partial pressures of each of the constituent of the gases. The partial pressure is defined as the pressure each gas would exert if it alone occupied the volume of the mixture at the same temperature.

we can calculate the contribution of different gases in a mixture to the total pressure. We refer to the pressure exerted by a specific gas in a mixture as its partial pressure. The partial pressure of a gas can generally be calculated using the ideal gas law.

According to daltons law of partial pressure

\(P_{total}\) = \(P_{1}\) + \(P_{2}\)

we know that 760mm Hg is equal to 1atm

So, 401mm Hg will have = 401 ÷ 760 ⇒ 0.527 atm

Hence , \(P_{total}\) = 0.527 + 0.639 ⇒ 1.166 atm

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Hi there,

My answer would be False.

Please mark

Thanks

The statement is false that if one person reacts to something in a certain way, that means ALL people will react to the same situation in the same way (Johnny gets stung by a bee, now he kills every bee he sees).

According to this question, if one person reacts to something in a certain way, that means ALL people will react to the same situation in the same way.

An example then states that Johnny gets stung by a bee and begins to kill every bee he sees.

This statement is false because when Johnny gets stung by a bee, everyone should react to the situation the same way Johny Johnny did.

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A polypeptide with the net positive charge at the physiologic pH of 7.4 most likely contains the amino acids with R groups of the type id Basic R type.

The Basic amino acids possess the net positive charge at the physiological pH of 7.4. The Basic amino acids have the extra amino group in the side of the chain that can release the H⁺ ions into the solution results in the formation of ion of NH₃⁺

The acidic amino acids have the extra amino group in the side of the chain that can release the H⁺ ions into the solution resulting in the formation of COO⁻ ion.

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Answer:

lithosphere

Explanation:

To find the moles present in 83.20 grams of manganese we must use the molar mass of manganese. This mass is equal to 54.94g/mol. So the moles of manganese (Mn) will be:

Answer: 83.20 grams of manganese are equivalent to 1.51 moles

An object's gravitational potential energy depends on its mass and its height above a reference level. The higher the object and the greater its mass, the more gravitational potential energy it has.

The amount of gravitational potential energy that an object has depends on two factors: its mass and its height above a reference level, such as the ground. The gravitational potential energy of an object increases with its mass, as well as its height above the reference level. The higher the object is from the reference level, the more potential energy it has due to the gravitational force between it and the Earth. This is expressed mathematically as:

Gravitational potential energy = mass x gravity x height

where "mass" is the mass of the object, "gravity" is the acceleration due to gravity, and "height" is the distance of the object from the reference level.

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The molality of isopropanol in water will be 9.83 mol/kg.

To calculate the molality of isopropanol in water, we need to first find the total mass of isopropanol and water in the solution.

The mass of isopropanol can be found by multiplying its density by the volume:

mass of isopropanol = density x volume

mass of isopropanol = 0.7860 g/mL x 208.5 mL = 163.53 g

Similarly, the mass of water can be found as:

mass of water = density x volume

mass of water = 1.000 g/mL x 275.0 mL = 275.0 g

Next, we need to find the total mass of the solution, which is simply the sum of the masses of isopropanol and water:

total mass = mass of isopropanol + mass of water

total mass = 163.53 g + 275.0 g = 438.53 g

Finally, we can calculate the molality of isopropanol as the number of moles of isopropanol per kilogram of water:

molality = number of moles of solute / mass of solvent (in kg)

number of moles of isopropanol = mass of isopropanol / molecular weight of isopropanol

molecular weight of isopropanol = 60.10 g/mol

number of moles of isopropanol = 163.53 g / 60.10 g/mol = 2.71 moles

molality = number of moles of isopropanol / (mass of water in kg)

mass of water in kg = 275.0 g / 1000 g/kg = 0.275 kg

molality = 2.71 moles / 0.275 kg = 9.83 mol/kg

So, the molality of isopropanol in water is 9.83 mol/kg.

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you have to drink a lot of water and 67890

Answer:

How did John D Rockefeller make his fortune? Rockefeller founded the Standard Oil Company in 1870. He ran it until 1897, and remained its largest shareholder.

Answer:

oil

Explanation:

Answer:

C. decreasing the distance between the objects

Explanation:

If the sample of magnesium used in a lab was contaminated with another metal that doesn't react with hydrochloric acid, then the results obtained in the experiment would be affected.

This is because the data collected during the experiment would reflect the reaction between hydrochloric acid and the contaminated sample instead of pure magnesium. As a result, the following changes in results might have been observed:

1. The mass of the contaminated sample would be higher than the mass of pure magnesium.

2. The rate of reaction between the contaminated sample and hydrochloric acid would be slower than the reaction between pure magnesium and hydrochloric acid.

3. The volume of hydrogen gas collected from the reaction would be lower than the volume of hydrogen gas collected in the reaction between pure magnesium and hydrochloric acid.

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Answer:

by using a lemon as a circuit and two positive and negative wires

Convection currents are the underlying cause of tectonic plate interactions that cause geological events, like earthquakes and volcanoes.

The tectonic plate interactions and processes that result in the construction of mountains and other landforms constitute the geological event that is taking place. Convection currents, which happen as molten rock rises from the Earth's mantle below the surface and then cools as it flows to the surface, are one of the primary processes generating this creation.

The plates move and interact with one another as a result of this process, which is fueled by the disparity in density between the hot and cold rock. Divergent boundaries, the kind of boundary at which this phenomenon occurs, are brought about by two plates moving apart.

The creation of the Himalayan Mountains is an illustration of this process. The Himalayas were created as a result of the Himalayan Plate colliding with the Eurasian Plate as it steadily moved north.

High peaks, deep valleys, and steep cliffs are some of the physical features that are visible as a result of this process. The highest mountain range in the world is the Himalayas, and Mount Everest is its highest peak.

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We must take into account the quantity of electrons exchanged in order to balance this redox reaction. Manganese (Mn) undergoes a shift in oxidation state from 0 (in the solid form) to +2.

(in the aqueous state). This indicates that during the process, Mn loses two electrons. Chromium (Cr) goes from +3 (in the aqueous state) to 0 in terms of oxidation state (in the solid state). This indicates that throughout the process, Cr gains 3 electrons. Equal to the amount of electrons that Cr obtains, Mn loses the same number of electrons. Consequently, the following is the balanced equation for this reaction: 2Mn2+(aq) + 3Cr = 2Mn(s) + 3Cr3+(aq) (s) In this balanced equation, this reaction involves the exchange of two electrons.We must take into account the quantity of electrons exchanged in order to balance this redox reaction. Manganese (Mn) undergoes a shift in oxidation state from 0 (in the solid form) to +2.

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The energy that is released for the breaking of bonds is 229 kJ/mol.

We should be able to recall that the enthalpy of the reaction taken to be the energy that is evolved or absorbed in the reaction that is ongoing. We have to note that in the course of the reaction there would be the breaking and the making of bonds.

Now we know that;

The bond energy can be given as;

Sum energy of the broken bonds of reactants  - Sum of the energy of the formed bonds

Hence;

(945 + 498) - 2(607)

1443 - 1214

= 229 kJ/mol

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AnswU GOT THIS!!!!!!!!!!!!!

Explanation:

Answer:

protein??

Explanation:

im not sure, but I could be wrong!!

Explanation:

Barium reacts readily with water to form barium hydroxide, Ba(OH)2 and hydrogen gas (H2).

Answer:

0.000425 kilowatt hour

Answer:

cells arose from preexisting cells

Explanation:

Rudolph Virchow is a German biologist that built on the work of other scientists such as Theodor Schwan to contribute his own quota to the development of the cell theory as it is currently known.

After several studies, Virchow rejected the idea of spontaneous generation and accepted the initially rejected idea of cell division. He earlier believed that cell division only takes place is some special type of cells and not in all cells.

Even though Virchow was not the first to bring the idea of cells arising from preexisting cells, he was the one that popularized the idea and added it to the earlier belief that all living organisms are made up of cells.

Answer:

B

Explanation:

The covalent phosphodiester bonds of DNA are hydrolyzed by restriction enzymes, leaving either "sticky/cohesive" ends or "blunt" ends.

By incubating the target DNA molecule with restriction enzymes, which detect and bind certain DNA sequences and cleave at specified nucleotides either inside or outside of the recognition sequence, restriction digestion is carried out.

An isolated bacterial protein known as a restriction enzyme cleaves DNA at sequence-specific locations to create DNA fragments with a known sequence at either end. Restrictions enzymes are crucial for numerous laboratory processes, including recombinant DNA technology and genetic engineering.

At the particular restriction site, DNA bonds between the 3′ OH of one nucleotide and the 5′ phosphate of the following one are cleaved by restriction enzymes.

In order to prevent the plasmid vector from ligating with itself and to verify that the inserted gene is oriented correctly, two separate restriction enzyme sites might be used.

A) #1 5′ - CGTGATCTCGATTCGCTAGTAACGTT - 3′

         3′ - GCACTAGAGCTAAGCGATCATTGCAA - 5′

    #2 5′ - TCATGAATTCCTGGAATCAGCAAATGCA - 3′

         3′ - AGTACTTAAGGACCTTAGTCGTTTACGT - 5′

B) Recognition sites:

#1 5′ - GAATTC - 3′

    3′ - CTTAAG - 5′

#2 5′ - GAATTC - 3′

    3′ - CTTAAG - 5′

C) Cleavage sites:

#1 5′ - G    AATTC - 3′

    3′ - CTTAA    G - 5′

#2 5′ - G    AATTC - 3′

    3′ - CTTAA    G - 5′

The correct and complete question is in the image.

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The process of a liquid becoming a gas is called boiling (or vapourization) and the process of a solid becoming a liquid is called melting.

Vaporization is the process of converting a liquid into a gas. It is also called evaporation. Since we know that the particles of a gas are moving faster than those of a liquid, an input of energy must be required for a liquid to become a gas.

Melting is a physical process that results in the phase transition of a substance from a solid to a liquid. During melting, the energy goes exclusively to changing the phase of a substance; it does not go into changing the temperature of a substance. Hence melting is an isothermal process because a substance stays at the same temperature.

Example 1: Industrially, salt is recovered from seawater by the process of vaporization. Wet clothes are dried up due to the process of vaporization. The process is used in many industrial processes for separating the components of a mixture.

Example 2: Ice to water - Ice melts back into the water when it is left out at temperatures above the freezing point of 32 degrees. Rocks to lava - Rocks in volcanoes can be heated until they are molten lava. Metal to molten liquid - Metals such as steel and bronze can be molten down.

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