Answer: freezing point
Explanation:
Chemical property is defined as the property of a substance which is observed during a reaction where the chemical composition identity of the substance gets changed.
Physical property is defined as the property which can be measured and whose value describes the state of physical system. For Example: State, density etc.
Flammability is a chemical property as it alters the chemical composition of substance.
pH is a chemical property as it alters the chemical composition of substance.
Toxicity is a chemical property as it alters the chemical composition of substance.
Freezing point is a physical property as it deals only with phase changes.
What type of solid is this? This solid has high melting point, does not conduct electricity, and does not dissolve in water. Metallic, network, molecular, ionic, or amorphous?
The solid described, with a high melting point, non-conductivity, and insolubility in water, is a covalent network solid.
Based on the properties presented - high melting point, non-conductive of electricity, and insolubility in water - the type of solid being described is most likely a covalent network solid. Covalent network solids are characterized by their strong covalent bonds that form a network throughout the solid, leading to very high melting points. They are typically hard and brittle, do not conduct electricity since there are no free-moving electrons or ions, and do not dissolve in water because their molecules are not easily separated from the network.
When a phosphate group is added to a molecule, that molecule is said to have been?
When a phosphate group is added to a molecule, the molecule has been phosphorylated, a process that facilitates chemical reactions, alters protein functions, changes molecular polarity, and is involved in energy storage and release within the cell.
Explanation:When a phosphate group is added to a molecule, that molecule is said to have undergone a process called phosphorylation. This is a common biochemical process where phosphorylation refers to the attachment of a phosphate to another molecule to facilitate a chemical reaction. There are many instances where this occurs in the cell. For example, protein phosphorylation often occurs on residues of the amino acids serine, threonine, or tyrosine, and is facilitated by an enzyme called kinase. Another example is when a phosphate group is transferred from ATP (adenosine triphosphate) to a molecule like glucose, creating a phosphorylated form such as glucose phosphate which can be stored or metabolized for energy.
The addition of a phosphate group often results in a change in the function of the protein, frequently resulting in an activation or deactivation of its activity. Additionally, the inclusion of a phosphate group increases the polarity of the molecule, making it a more polar molecule, which can alter its interactions and stability within the cell. The attachment of the phosphate group typically requires energy, and the cleavage of a phosphate group from ATP, a process called dephosphorylation, releases energy.
An ion from a given element has 22 protons and 18 electrons. what is the charge on the ion?
The charge on the ion is +4.
What is an ion?An ion is an atom or group of atoms where the number of electrons are not equal to the number of protons. To put it in a simple words, when a stable atom gains or loses an electron, it becomes an ion. Examples of ions are as follows: H+,Na+,Ca2+,F−,O2−For a single atom, the charge is the number of protons minus the number of electrons.
Charge = Proton - electron
= 22 - 18
= +4
Hence, the charge on the ion is +4.
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Which is the element with the highest electronegativity value? (1 point) cesium helium calcium fluorine?
Fluorine is the element with the highest electronegativity value due to its strong ability to accept electrons and complete its outer shell. This trait makes it highly reactive and common as a negatively charged fluoride ion.
Explanation:The element with the highest electronegativity value is fluorine. Electronegativity is a measure of the ability of an atom to attract shared electrons in a chemical bond. Fluorine has an extremely high electronegativity value due to its small size and the fact it has seven electrons in its outer shell. This makes it highly likely to bond with other atoms so that it can gain the one electron it needs to reach a full outer shell of eight electrons. This ability to accept electrons easily also causes fluorine to have a high Electron Affinity (EA) value.
Fluorine's tendencies to attract electrons is also reflected in its common occurrence as a fluoride ion (F-), an anion with a negative charge due to the additional electron it has gained. This behaviour is also seen in the other elements in fluorine's family, the halogens, which readily accept an extra electron and are highly reactive chemically.
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Explain why neon is monatomic but chlorine is diatomic
Organisms do not adapt as a result of competition for resources. Please select the best answer from the choices provided T F
Organisms do not adapt as a result of competition for resources. Please select the best answer from the choices provided T OR F its FALSE
In an ecosystem organisms adapt as a result of competition for resources.Hence the given statement is false.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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Jamaal wants to be an all-around hustler when he grows up. he plans to engage in robbery, burglary, drug dealing, as well as pimping. the chance for jamaal to pursue this career path is readily available in the urban area in which he resides. this chance is a part of the __________.
If a sample containing 2.50 ml of nitroglycerin (density=1.592g/ml) is detonated, how many total moles of gas are produced?
Zn + FeCl3 -> ZnCl2 + FeCl2
Final answer:
In the given chemical equation, zinc (Zn) is being oxidized and iron (Fe) is being reduced. The balanced ionic equation for the reaction is Zn + 2Fe^3+ -> Zn^2+ + 2Fe^2+.
Explanation:
In the given chemical equation:
Zn + FeCl3 -> ZnCl2 + FeCl2
It is a redox reaction where zinc (Zn) is being oxidized and iron (Fe) is being reduced.
The zinc (Zn) loses electrons and is oxidized from its elemental state to the +2 oxidation state in zinc chloride (ZnCl2). The iron (Fe) gains electrons and is reduced from the +3 oxidation state in iron(III) chloride (FeCl3) to the +2 oxidation state in iron(II) chloride (FeCl2).
The balanced ionic equation for the reaction is:
Zn + 2Fe^3+ -> Zn^2+ + 2Fe^2+
The total oxide ion charge in a formula unit of mno is 2–. what is the charge on each manganese ion?
It is given that MnO2 has a formula charge of – 2. We know that each oxygen or oxide ion has also a charge of – 2, therefore there are a total of – 4 oxide charges. So we can write:
X + (- 4) = - 2
Where X is the charge of one manganese ion, so calculating for X:
X = - 2 + 4
X = 2
So the charge of manganese is 2+
The charge on each manganese ion in MnO is ⁺2, balancing the ⁻2 charge of the oxide ion. This ensures that the overall charge of the compound is neutral.
To find the charge on each manganese ion in MnO, we need to consider the charges of the ions involved.
In MnO, the oxygen ion typically has a charge of ⁻2 (oxide ion). Since the total charge of the oxide ions in the formula unit of MnO is ⁻2, and the compound as a whole must be neutral, the charge on the manganese ion must balance this out.
Therefore, the manganese ion must have a charge that offsets the ⁻2 charge of the oxide ion. This means each manganese ion in MnO must have a charge of ⁺2.
In summary, the charge on each manganese ion in MnO is ⁺2.
What is the bond type of CaO
If helium had exactly the same mass as four hydrogen atoms, the luminosity o f the sun would be
Final answer:
If helium had the same mass as four hydrogen atoms, there would be no mass loss to energy during fusion, leading to a significant decrease or absence of the Sun's luminosity from this process.
Explanation:
If helium had exactly the same mass as four hydrogen atoms, the luminosity of the sun would be different because the mass-energy conversion in the nuclear fusion process would be altered. Currently, during the conversion of hydrogen to helium, a small fraction of mass is converted into energy according to the mass-energy equivalence principle (E=mc²). This mass loss is what contributes to the Sun's luminosity. The mass loss per reaction is about 0.7 percent of the rest energy of the original hydrogen.
The Sun currently burns approximately 630 million metric tons of hydrogen into helium each second to produce its luminosity of 4 × 10²⁶ watts. If helium and four hydrogen atoms had the same mass, no mass would be converted to energy, implying there would be no luminosity deriving from this process. However, in reality, the presence of a mass defect allows for the release of energy during fusion. The complex relationship between mass and luminosity can be expressed by the approximation L ∼ M³°⁹, where 'L' represents luminosity and 'M' the mass.
In conclusion, if helium had exactly the same mass as four hydrogen atoms, there would be no mass converted to energy during the fusion process, leading to a significant decrease in the Sun's luminosity or possibly no luminosity at all from this source of energy. This would fundamentally change the energetic balance and life cycle of the Sun.
What color element symbol designates elements that are a gas at a given temperature??
Select all of the answers that apply. Without its atmosphere, Earth would be _____. warmer bombarded by meteorites similar to Mars relatively lifeless
The answer is B, C and D
HELP ASAP!!
Which of the following sciences is NOT a sub-field of Earth Science?
a. Oceanography
b. Vulcanology
c. meteorology
d. Botany
An upright cylindrical tank with radius 6 m is being filled with water at a rate of 2 m3/min. how fast is the height of the water increasing?if h is the water's height, the volume of the water is v = πr2h. we must find dv/dt. differentiating both sides of the equation gives
The problem of determining how quickly the water level is rising in an upright cylindrical tank can be solved by identifying the rate of change of volume (dv/dt) and differentiating the volume equation relative to time.
Explanation:The problem is about the rate of increase in the height of water in a cylindrical tank. As specified, if v = πr²h represents the volume of the water where r is the tank's radius and h is the water's height, then the rate of volume change dv/dt would differentiate the volume equation relative to time.
As the tank is cylindrical and upright, its radius does not change over time. Consequently, we differentiate the volume function with respect to time to find dv/dt = πr²dh/dt, where dh/dt represents how fast the water's height is increasing.
We are given dv/dt is equal to 2 m³/min since the water is filling at a rate of 2 m³/min. When we substitute the values and solve for dh/dt, we find the rate of increase of the height of water.
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Zinc has a mass of 4.50g calculate the volume
The volume of given amount of zinc will be 0.631 cm³.
What is the relation between the mass and density of a solid body?
The relation between the mass and density of any solid is given by -
M = dV
where -
[M] is the mass
[d] is density
[V] is volume
Given is Zinc that has a mass of 4.50 g.
We can write -
Mass of zinc = [M] = 4.5 g
Density of zinc = [d] = 7.13 g/cm³
Therefore, the volume of given amount of zinc will be -
V = M/d
V = 4.5/7.13
V = 0.631 cm³
Therefore, the volume of given amount of zinc will be 0.631 cm³
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Final answer:
To find the volume of the zinc sample weighing 4.50g, divide the mass by the density of zinc (7 g/cm³), resulting in a volume of approximately 0.643 cm³.
Explanation:
To calculate the volume of a sample of zinc with a mass of 4.50g, we need to know the density of zinc. From the provided examples, we can determine that the density of zinc is effectively 7 g/cm³ (since if 1 cm³ of zinc has a mass of about 7 grams).
Using the formula density = mass/volume, we can find the volume by rearranging the formula to volume = mass/density. Plugging in the numbers, we get:
volume = 4.50 g / 7 g/cm³ = 0.643 cm³ (approximately)
Therefore, the volume of the 4.50g sample of zinc is approximately 0.643 cm³.
It's important to think about your result and ensure it's reasonable. Given the mass and density, a volume of 0.643 cm³ for zinc is consistent with its known physical properties.
The elements at the bottom of the table were pulled out to keep the table from becoming too long. these are called the
The first ionization energy, e, of a potassium atom is 0.696 aj. what is the wavelength of light, in nm, that is just sufficient to ionize a potassium atom? values for constants can be found here.
The wavelength of light that is just sufficient to ionize a potassium atom is 656 nm.
Explanation:To solve this problem, we will utilize Planck's equation along with the photoelectric effect. Planck's equation is E = hv, where E is the energy, h is Planck's constant (6.62607015 x 10^-34 Js), and v is the frequency. The photoelectric effect says that a photon's energy must be larger than the binding energy (the ionization energy) to eject an electron from an atom.
The ionization energy of potassium is given in aj (atom Joules), but it will be more convenient to convert this into joules (J). 1 aj = 4.35974 x 10^-18 J, so the ionization energy e = 0.696 aj = 0.696 * 4.35974 x 10^-18 J = 3.03 x 10^-18 J.
We equate this to the energy of the photon (E=hv), then rearrange to find ν = E / h = (3.03 x 10^-18 J) / (6.62607015 x 10^-34 Js) = 4.57 x 10^15 Hz.
Then, using the formula c = λv, where c is the speed of light, we isolate λ, the wavelength, to find λ = c / v = (3.00 x 10^8 m/s) / (4.57 x 10^15 Hz) = 6.56 x 10^-8 m. As the question requested the answer in nanometers (nm), we convert this to obtain the final answer: 6.56 x 10^-8 m = 656 nm.
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Suppose that for the same 10.0 ml sample described in q3, the mass of the crucible with precipitate was 17.550 g, and the mass of the empty crucible (tare weight) was 17.410 g. calculate the concentration of the ba(oh)2 solution from these data.
Final answer:
To find the concentration of the Ba(OH)2 solution, you subtract the mass of the empty crucible from the mass with the precipitate to get the mass of the precipitate. However, without the chemical equation or the formula of the precipitate, further calculations cannot be completed.
Explanation:
To calculate the concentration of the Ba(OH)2 solution from the mass of the precipitate obtained, we need to follow a series of steps. First, determine the mass of the precipitate by subtracting the mass of the empty crucible from the mass of the crucible with precipitate.
The given masses are 17.550 g (crucible with precipitate) and 17.410 g (empty crucible), so the mass of the precipitate is 17.550 g - 17.410 g = 0.140 g.
True or false a mixture is made of two or more elements that are chemically combined
Oxygen, with an atomic number of 8, is a neutral atom and would have ___________ electrons in the first electron shell and _________ electrons in the second electron shell
Oxygen, with an atomic number of 8, is a neutral atom and would have two electrons in the first electron shell and six electrons in the second electron shell.
What is the atomic number?The quantity of protons in an atom's nucleus is known as the atomic number. The number of protons determines an element's identity (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).
The number of protons in an atom is the atomic number. It is sometimes referred to as the proton number for this reason. The capital letter Z is used to represent it in calculations.
Therefore, with an atomic mass of 8, oxygen is a neutral atom that has two electrons in its outermost electron shell and six in its outermost electron shell.
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The chemical properties of an atom are primarily determined by the number of
The chemical properties of an atom are primarily determined by its valence electrons, which are indicated by the atomic number and organized in the periodic table to reflect similarities in properties.
Explanation:The chemical properties of an atom are primarily determined by its electrons, specifically the number of valence electrons. These are the electrons in the outermost shell of an atom. The atomic number, denoted by the letter Z, reveals the number of protons in an atom's nucleus, and since atoms are electrically neutral, it also indicates the number of electrons. In a neutral atom, the chemical properties are influenced by the arrangement of these electrons in various energy shells, with the outermost electrons playing the most significant role in chemical reactions and bonding. The periodic table arranges elements in such a way that those with similar valence electron configurations, and hence similar chemical properties, are in the same column.
Isotopes have the same ____________ but have a new atomic mass because they _________________. *
Number of electrons; have more or less neutrons
Number of protons; have more or less neutrons
Number of protons; have more or less electrons
Number of electrons; have more or less protons
Answer:
Isotopes have the same number of protons but have a new atomic mass because they have more or less neutrons.
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Does this difference in potential energy cause a release of energy or obsorption of energy from the atoms?
What are 3 signs that a chemical change (chemical reaction) has taken or is taking place?
In which direction on the periodic table, horizontal or vertical, are elements with similar chemical properties aligned? what are families of elements with similar chemical properties called?
Elements in the periodic table that has similar chemical properties are been arranged in vertical direction , and families of these elements are regarded as group.
The vertical aliment of the elements in the periodic table are this elements that posses similar properties.Elements in the same group do have similar chemical properties, for instance Sodium and potassium belongs to alkali metals, they are from s-block. They posses chemical properties like high reactivity, they are ready in loosing their outmost electron so they can form cations along with charge, they always appear as silvery substanceThe numbering of the Groups is from 1 to 18. If we move from left to right, we have group 1 and 2 which are elements in the s- block, then there are ten groups moving from 3 through 12 in the transition block(d- block) then six groups if we move through 13 and 18 in main block.Hence, families of these elements are regarded as group.
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Explain why a piece of aluminum or magnesium can be used to remove tarnish, which is mostly silver sulfide, on silverware.
How many aluminum atoms are in 3.78 g of aluminum?
The 3.78 g of aluminum contains approximately 8.43 * 10^22 aluminum atoms.
Explanation:To find out how many aluminum atoms are in 3.78 g of aluminum, we first need to calculate the number of moles of aluminum. We know that one mole of aluminum weighs 26.98 g (as per the atomic weight of aluminum listed in the periodic table). Hence, 3.78 g of aluminum is equivalent to 3.78 g / 26.98 g/mol = 0.140 moles. Now, to calculate the number of atoms, we use Avogadro's number, which states there are approximately 6.022*10^23 atoms in one mole. Therefore, 0.140 moles of aluminum will contain 0.140 moles * 6.022*10^23 atoms/mole = 8.43 * 10^22 atoms.
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For the fourth-shell orbital shown below, what are the principal quantum number, n, and the angular momentum quantum number, l
The principal quantum number, n, and the angular momentum quantum number, l, determine various properties of the orbital.
Explanation:The principal quantum number, n, determines the general range of energy and the probable distances that the electron can be from the nucleus. The angular momentum quantum number, l, determines the shape of the orbital. For a given value of l, the angular momentum projection quantum number m₁ can have specific values between -l and +l.
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The principal quantum number, n, determines the general range of energy and probable distances of an electron from the nucleus. The angular momentum quantum number, l, specifies the shape of the orbital and corresponds to the orbital's general shape.
Explanation:The principal quantum number, n, determines the general range of energy and probable distances of an electron from the nucleus. The angular momentum quantum number, l, specifies the shape of the orbital and corresponds to the orbital's general shape. For the fourth-shell orbital, the principal quantum number would be 4 and the angular momentum quantum number would be 0, 1, 2, or 3.
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