a nugget of gold with a mass of 521 g is added to 50.0 ml of water. the water level rises to a volume of 77.0 ml. what is the density of the gold? group of answer choices

Answer:

True

Explanation:

Answer:

c the change of a shape of malleable metal

Explanation:

yes!!

The molecular  weight is  84.43  g

m =  moles of solute x 1000 /  mass of solvent (g)

so

moles of solute x 1000 /  10.0028  = 1.1938

moles of solute = 0.0119

moles = mass / molar mass

1.0083  / molar mass  = 0.0119

molar mass =  1.0083 / 0.0119

molar mass = 84.43

In chemistry, the molar mass of a chemical compound is defined as the ratio between the mass and the quantity of substance of any sample of said compound. The molar mass is a bulk, now not molecular, belongings of a substance.

Molar mass M is the mass of a chemical compound divided by its amount of substance measured in moles. it's far defined as MB = m/nB, in which m is the overall mass of a sample of natural substance and nB is the amount of substance B given in moles. The definition applies to pure substance. Molar mass is the mass of 1 mole of any substance. One mole of any species (atoms, molecules, ions, or debris) is that amount in a variety having a mass same as its atomic or molecules mass in grams. Molar mass is represented through "M"

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Complete Question:

A 1.0083 g sample of an unknown nonelectrolyte is dissolved in 10.0028 g of benzophenone producing a solution that freezes at 36.4 C. If the pure benzophenone melted at 48.1 C, what is the molecular weight of the unknown compound? The Kf for benzophenone is 9.8 C/m.

1008 moles of n2 can be made when 108.1 grams of CUo are consumed.

What are moles?

A mole is just a measuring scale. In reality, it's one of the International System of Units' seven foundation units (SI). When already-existing units are insufficient, new ones are created. The levels at which chemical reactions frequently occur exclude the use of grammes, yet utilising absolute numbers of atoms, molecules, or ions would also be unclear. To fill this gap between extremely small and extremely huge numbers, scientists created the mole. A mole must be specified or be based on something reproducible, like all other units. The number of atoms in a sample of the isotope carbon-12 was once the basis for the current definition of the mole, which is now based on other factors.

108 mol CuO x (1 mol N2 / 3 mol CuO) = 36 moles of N2.

36 mol N2 x (28 g N2 / 1 mol N2) = 1008 grams of N2.

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Answer:

hi

I feel confident about creating energy diagrams because I have been practicing creating energy diagrams for different reactions and understanding how to interpret them. It is challenging to figure out which bonds are broken in a reaction because it requires a good understanding of chemical bonds and reaction mechanisms. One strategy I used to figure out whether energy is gained or lost in a system was to calculate the change in enthalpy using the bond energies of the reactants and products. To remember definitions of vocabulary words in this unit, one strategy I used was to create flashcards and quiz myself regularly on their meanings. Overall, this unit has helped me understand how energy is involved in chemical reactions and how it affects the stability of a system.

The offered statement claims that CaCl2 is a salts that develops as a result of an ionic connection.

An ionic substance called calcium chloride is prescribed to treat hypocalcemia and hyperkalemia as well as to treat calcium intoxication brought on by taking too much magnesium sulfate. This ionic compound calcium chloride is created when limestone and chlor interact. It is extremely insoluble in water or deliquescent.

a strong oxidizing disinfectant that is a fine white powder. Chlorine gas is passed through slaked lime to create calcium chloride chlorine ions. In water, it breaks down and releases chlorine. Some industrial bleaching powders are made by combining calcium hypochlorite plus calcium chloride physically.

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The mole fraction of H3PO4 in the solution is 0.0209, and the mole fraction of water is 0.9791.

To find the mole fractions of H3PO4 and water in a solution of 14.5 g of H3PO4 in 125 g of water, we first need to convert the mass of each substance to moles. To do this, we use the molar mass of H3PO4 (97.994 g/mol) and water (18.015 g/mol).

The moles of H3PO4 in the solution can be calculated as follows: 14.5 g / 97.994 g/mol = 0.1483 mol.

The moles of water in the solution can be calculated as follows: 125 g / 18.015 g/mol = 6.944 mol.

Next, the mole fractions can be calculated by dividing the moles of each substance by the total number of moles in the solution:

Mole fraction of H3PO4 = 0.1483 mol / (0.1483 mol + 6.944 mol) = 0.0209

Mole fraction of water = 6.944 mol / (0.1483 mol + 6.944 mol) = 0.9791

Therefore, the mole fraction of H3PO4 in the solution is 0.0209, and the mole fraction of water is 0.9791.

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The given statement is true. Most metals semiconductors as well as ceramics have a crystalline structure in which the atoms or ions display short range order.

Semiconductor: A semiconductor is a substance that has specific electrical properties which enable it to serve as a foundation for computers as well as other electronic devices. It is typically a solid chemical element or compound which conducts electricity under certain conditions but not others.

In a crystalline solid, the atoms or ions are arranged in a repeating pattern, giving the material long-range order and stability. This is what gives crystalline solids their characteristic mechanical and thermal properties. The short-range order refers to the arrangement of atoms or ions within individual crystal lattice unit cells, while the long-range order refers to the arrangement of unit cells across the entire solid.

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About 250 thousand times greater is the hydrogen-ion concentration of stomach acid than that of blood.

In chemistry, awareness is the abundance of a constituent divided by using the whole extent of an aggregate. several styles of mathematical description can be outstanding: mass concentration, molar awareness, quantity concentration, and volume awareness.

In technology, the amount of a substance, which includes salt, this is in a positive amount of tissue or liquid, along with blood. A substance becomes more concentrated while much less water is present. The concentration of the solution may be expressed in molarity, molality, normality, mole fraction, and many others. the attention of a substance is the amount of solute present in a given quantity of answer. Concentrations are commonly expressed in phrases of molarity, defined as the variety of moles of solute in 1 L of answer.

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Complete Question:

Stomach acid has a pH of about 2.0, and blood has a pH of 7.4. How many times greater is the hydrogen-ion concentration of stomach acid than that of blood?

The chemical behavior of an atom is determined by the distribution of electrons in the atom's electron shells.

Electron shells are energy levels surrounding an atom's nucleus, where electrons are found. The number of electron shells is determined by the atomic number of the element. Each shell has a set number of electrons that it can hold, with the first shell holding two electrons, the second holding eight, and the third and subsequent shells holding 18 electrons each. The electron shells are arranged in an organized manner, with electrons filling the lower energy levels before moving to higher energy levels. When an electron is excited, it moves to a higher energy level, creating an electron shell configuration known as an excited state.

Electrons in the outermost shell are called valence electrons, and they play a crucial role in chemical reactions. The arrangement of electrons in electron shells helps determine an element's chemical properties, including its reactivity, melting point, and boiling point. In summary, electron shells are an important aspect of atomic structure that plays a significant role in determining an element's behavior in chemical reactions.

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It implies that the messiest substance is 1.0mole of NI3. The right response is A.

Of all known elements, provides an extraordinary has the greatest atomic mass and atomic number. Only five (perhaps six) elements of the atom oganesson-294 have been found since 2005 due to the decaying atom's extreme instability.

Answer and justification As a result, we can observe that a mole of sulfuric acid has the largest mass.

NI3 has a molar mass of 394.72g/mol.

H3PO4 has a molar mass of 97.99 g/mol.

KCl has a molar mass of 74.55g/mol.

FeCl3 does indeed have a molarity if 162.2 g/mol.

It implies that the messiest substance is 1.0mole of NI3. The right response is A.

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The complete question is:

If you have 1.0 mol of each of the following compounds, which will have the greatest mass? A.) NI3 B.) H3PO4 C.) KCl D.) FeCl3

Since they are lipid impermeable or too big, molecules require a transport protein to assist them traverse a membrane.

A molecule is the smallest component of a material that keeps its content and characteristics. It is made up of two or more electrons that are linked together by chemical bonds. Biochemistry is constructed on molecules. The element name and a subscript indicating the amount of atoms are used to identify molecules.

Molecules are created when elements come together. Two hydro (H) atom and one oxide (O) atom make up the three atoms that make up a water molecule. This is why water is occasionally shortened as H2O. There are billions of hydrogen atoms in an one drop of liquid.

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We can make use of the correlation approach, T test, and linear regression techniques in this situation.

The two variables in this example of a eutrophic lake are temperature and dissolved oxygen, and both of these variables change over time. Therefore, a correlation test must be performed to see whether a relationship between these two variables exists. Here, the correlation coefficient value will be given to us, allowing us to calculate the linear relationship between these two variables.

Additionally, we can use the T test to determine whether or not the correlation between these two variables is strong enough to reject the null hypothesis.

Finally, we can also utilize the linear regression method to get a more accurate relationship between those two variables.

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Because solid medium promotes colony formation for the cultivation of microorganisms. whereas for the growing of discerning microorganisms and the upkeep of stock cultures, broth is appropriate.

An organism's amount of oxygen need can be seen in broth media. Anaerobes that must exist will develop at the bottom. Aerobes must-haves will increase at the top. Anaerobes that are facultative will proliferate throughout the medium, but predominantly near the top. Microaerobes won't grow at the surface; they'll grow upward. Bacteria that are aerotolerant will spread evenly throughout the soup.

Microorganisms can be grown on two different types of growths: nutrient agar and nutrient broth. The fundamental distinction between nutrient broth and nutrient agar is that the latter is a liquid media, whilst the former is a solid. To make the nutrient agar more stable, agar is added to it. It is a galactose-based polymer. Because it promotes colony formation, nutrient agar is ideal for the cultivation of microorganisms. For the growing of discerning microorganisms and the upkeep of stock cultures, nutrient broth is appropriate. In comparison to nutrient broth, which is prepared in test tubes or bottles, nutritional agar is prepared in Petri dishes.

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The slope of a plot of concentration of reactant A versus time for a zeroth-order reaction represents the rate of reaction. In a zeroth-order reaction, the rate of reaction is constant and independent of the concentration of the reactant. Thus, the slope of the plot will be a constant value that represents the rate constant of the reaction. This means that the rate of the reaction is proportional to the negative of the slope of the plot, and the units of the rate constant will be concentration/time.

In a zeroth-order reaction, the rate of reaction is directly proportional to the concentration of reactant and is independent of time. If we plot the concentration of reactant "a" against time, the slope of this plot will correspond to the rate of the reaction at that particular time. The slope will be negative, indicating that the concentration of reactant is decreasing as time passes. The magnitude of the slope will reflect the speed of the reaction and how quickly the reactant is disappearing. Zeroth-order reactions have a constant rate, and the slope of the plot will remain the same, regardless of the concentration of the reactant. This makes zeroth-order reactions useful in applications such as drug kinetics, where the rate of reaction is a critical factor.

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In order to achieve the stable electron configuration, the selenium atom obtains two electrons and adopts the Krypton configuration.

The sulfur family, which also comprises selenium, includes tellurium and polonium. Six electrons make up the outermost shell of this family. Particularly for selenium, the electron configuration is 2-8-18-6. Due to the fact that selenium has six electrons in its outermost shell, it can have a variety of valence values. In order to produce its most stable ion, a selenium atom (Se) would gain two electrons.

Since selenium is a member of the oxygen family, often known as group 16, it contains six valence electrons. It searches for two additional electrons to have a whole outer shell of eight electrons.

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The form of the complete folded polypeptide is referred to as the tertiary structure. Dipole-dipole interactions and hydrogen bonds between polar amino acids are what allow this structure to emerge.

These amino acids are arranged in a long chain and joined to one another by covalent peptide bonds to form proteins. Polypeptides are another name for proteins. The amino acid sequence found in every kind of protein is distinct and identical from one protein to the next.

Polypeptides. Proteins are created by joining several amino acids together to form polypeptides. The combining of four or more glycoprotein results in the formation of proteins, which are then pleated into the appropriate shape.

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Nuclear fission is the process of splitting of a heavy unstable nucleus into two smaller nuclei. Hence, first option is correct.

There are many unstable radioactive isotopes which undergo nuclear decay by the emission of alpha or  beta particles. Sometimes a heavy unstable radioactive isotope undergo decomposition to produce two smaller nuclei. This process is called nuclear fission.

The fusing of two light nuclei to form a heavy nucleus is called nuclear fusion. Both nuclear fission and nuclear fusion releases tremendous energy to the surroundings.

Nuclear fusion is the source of light and heat energy in sun and other stars. Fusion releases higher energy than fission. Nuclear fission is used in atom bombs.

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The best method for preparing a supersaturated NaCH₃CO₂ solution would be by adding 1.23 g of NaCH₃CO₂ to 200 ml of water at 80 °C while stirring until all the solid dissolves, and then letting the solution to cool at room temperature.

The solubility of a solute in a solution depends upon its concentration.

Given that, the solubility of NaCH₃CO₂ at 80 °C is ~1.23 g/ml. So, If we add 1.23 g of solute at 80 °C and let it cool down slowly without any perturbation, then the resulting solution at room temperature will have a concentration of 1.23 g/200 ml = 0.00615 g/m, which is a supersaturated solution.

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There are several possible sources of error, including incorrect calibration of the thermometer, incorrect atmospheric pressure, or incorrect measurement of the temperature.

Calculation:

The difference between the measured temperature (105.25 °C) and the correct temperature (100.00 °C) can be calculated as follows:

105.25 °C - 100.00 °C = 5.25 °C.

This difference indicates that there was an error in the experiment. To determine the cause of the error, it is necessary to examine the entire experimental setup, including the thermometer, atmospheric pressure, and temperature measurement process. For example, if the thermometer was not calibrated correctly, the measured temperature would not be accurate. If the atmospheric pressure was not at 1 atm, the boiling point of the water would be different than 100.00 °C. If the temperature measurement was not taken correctly, the recorded value would not be accurate. By examining all potential sources of error, the student can determine what went wrong in the experiment and take steps to correct the problem for future experiments.

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Ionic bonds is the reason which result in the formation of the salt CaCl2.

Ions having opposing charges electrostatically attract one another to form ionic bonds, sometimes referred to as electrovalent bonds, in chemical molecules. Whenever the valance (outermost) electron of one atom are permanently transferred to another atom, a bond of this kind is created.

The total transfer of certain electron through one atom to that other results in the formation of an ionic connection. A negatively charged ion known as a cation results from an atom loosing one or more electrons. When an atom receives one or more electrons, it produces an anion, or negative charges ion.

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387.27 K temperature will the reaction proceed 6.00 times faster than it did at 337 K.

k2 is 6 times k1 and hence k2/k1 = 6

we have ln(k2/k1) = Ea/R (1/T1- 1/T2)

ln(6) = 38670/8.314 x( 1/337 -1/T2)

0.00038522 = (1/337 -1/T2)

1/T2 = 0.0033525

T2 = 387.27 K

In chemistry and physics, activation electricity is the minimal amount of electricity that has to be supplied for compounds to result in a chemical reaction. The activation energy of a reaction is measured in joules per mole, kilojoules in keeping with mole, or kilocalories consistent with mole.

Activation strength is described as the minimum quantity of strength required via a reacting molecule to get transformed into a product. it may additionally be defined because the minimal amount of energy had to prompt or energize molecules or atoms in an effort to go through a chemical reaction or transformation. In transition-state theory, activation electricity is the distinction in electricity content material between atoms or molecules in an activated or transition-country configuration and the corresponding atoms and molecules in their initial configuration.

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Complete Question:

A certain reaction has an activation energy of 38.67 kJ/mol. At what Kelvin temperature will the reaction proceed 6.00 times faster than it did at 337 K?

6 molecule of Fe[tex]_3[/tex](PO[tex]_4[/tex])[tex]_2[/tex] contains 78 atoms. Therefore, the correct option is option C among all the given options.

The smallest unit of matter that may be split without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics. As a result, the atom serves as the fundamental unit of chemistry.

Space makes up the majority of an atom. The remainder is made up of a cloud of electrons with negative charges around a positive-charged nucleus made up of protons and neutrons. Compared to electrons, that are the smallest charged particles in nature, the nucleus is tiny and dense.

1 molecule of Fe[tex]_3[/tex](PO[tex]_4[/tex])[tex]_2[/tex] contains 13 atoms

6 molecule of Fe[tex]_3[/tex](PO[tex]_4[/tex])[tex]_2[/tex] contains 13×6=78 atoms

Therefore, the correct option is option C.

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The azimuthal quantum number provides information about the shape and angular distribution of an electron's orbital in an atom.

What information does azimuthal number provide?

The azimuthal (subsidiary) quantum number, also known as the angular momentum quantum number (l), provides information about the shape and angular distribution of an electron's orbital in an atom.

The value of the azimuthal quantum number can range from 0 to (n-1), where n is the principal quantum number. The value of l determines the type of orbital occupied by the electron, with different values of l corresponding to different shapes of the orbital. The four types of orbitals are s, p, d, and f orbitals.

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The dispersion forces exerted by the CL molecule will be the strongest. Iodine compounds have the most electrons, hence their dispersion forces are also the maximum.

The smallest component of a compound that possesses both its chemical and chemical characteristics. Yet another or more elements make up molecules. There are three different kinds of molecules: atom-sized molecules, element-sized molecules, and compound-sized molecules.

The appropriate name titin is 20 to 50 times bigger than the typical enzyme, with a degree of polymerization of 1.4 million and an uninterrupted chain of 27,000 polypeptide chains. Molecules are created when atoms come together.

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Answer:

A

Explanation:

Both an increase in temperature and a decrease in pressure will lead to a decrease in the solubility of N2(g) in a saturated aqueous solution.

Solubility Factors-

For a saturated aqueous solution of N2(g) at 20°C and 1 atm, the solubility of N2(g) will decrease when the temperature increases and will also decrease when the pressure decreases.

(1) The solubility of a gas in a liquid is directly proportional to the pressure of the gas above the liquid. According to Henry's Law, the solubility of a gas in a liquid is proportional to the pressure of the gas above the liquid, so when the pressure decreases, the solubility of N2(g) will decrease.

(2) The solubility of a gas in a liquid decreases with increasing temperature. As the temperature of a solution increases, the solubility of gases in the solution decreases. This is because the increased temperature increases the kinetic energy of the gas molecules, allowing them to escape more easily from the solution into the gas phase.

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According to the argument, 0.75 L of hydrogen is produced when a 2.2g zinc nail is added to an excess of hydrochloric acid.

It is present in the majority of stars, including the sun, and makes up the majority of Jupiter's surface. The most h on Earth is found in water. Its presence in the air as a gas is limited to less than 1% of the volume.

Hydrogen has the molecular formula H2 and a molecular formula of 1. The first isotope as among exceed belongs to hydrogen, which is represented by the character H. It is a highly flammable, tasteless, and odorless gas.

Zn + 2HCl → ZnCl2 + H2

moles = mass / molar mass

The molar mass of zinc is 65.38 g/mol, so the number of moles of zinc is:

moles = 2.2 g / 65.38 g/mol = 0.0337 moles

liters = 0.01685 moles * 22.4 liters/mole = 0.375 liters = 375 mL

So, the answer is (B) 0.75 L.

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The strength of intermolecular attractions in a pure sample of a compound is determined by several factors, including the size, electronegativity, and polarity of the molecules.

The strongest type of intermolecular attraction is usually hydrogen bonding, followed by dipole-dipole interactions and London dispersion forces.

In order to determine the strongest intermolecular attraction for a specific compound, it is necessary to have information about the chemical structure and properties of the molecules. For example, if the compound contains polar bonds or highly electronegative elements such as nitrogen and oxygen, then hydrogen bonding may be the strongest intermolecular attraction. On the other hand, if the compound contains non-polar bonds or non-polar elements such as carbon and hydrogen, then London dispersion forces may be the strongest intermolecular attraction.

It is important to note that the strength of intermolecular attractions can affect a variety of physical properties, including boiling point, surface tension, and viscosity, among others. Understanding the strength and type of intermolecular attractions in a compound is important for predicting its behavior and properties.

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The Diels-Alder reaction is an electrocyclic process that involves the [4+2]cycloaddition of 2 and 4 electrons from the dienophile and 4 electrons from the conjugated diene (an alkene or alkyne).

A conjugated diene and an alkene undergo a cycloaddition event in the Diels-Alder reaction. A 1,4-addition product is created by this reaction. The reaction of 1,3-butadiene with maleic anhydride serves as an example.

Consequently, [4+2] cycloaddition is the name given to the cyclic addition of diene and dienophile. This shows that a Diels-Alder reaction is best described by the [4+2] cycloaddition.

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