Hotspot volcanoes occur along subduction zones.
a. True
b. False

Answer:

Element 6 has the lowest ionization energy

Explanation:

The ionization energy increases across the period but decreases down the group of a periodic table.

Which implies that the elements with the lowest ionization energies would be in the bottom left-hand corner of the periodic table. The change in ionization energies is also increases going down the periodic table (by change within a group) than going across the periodic table (by change within a period). From the 3 elements above we could infer that element 6 has the lowest ionization energy.

Hydrogen have three isotopes namely proton, deuteron and triton. The hyphen notation for these isotopes can be written as H-1, H-2 and H-3 with mass number 1, 2 and 3 respectively.

Isotopes are atoms of same atomic number and different mass numbers. Isotopes can be of one mass number difference or 2 to three. For example, carbon have three isotopes. C-12, C-13, C-14. The mass numbers are one unit higher from the previous one.

Many elements have isotopes, like for chlorine, bromine, nitrogen, fluorine etc with a natural stability. Hydrogen have three isotopes that are hydrogen -1 with one mass number 1 called proton.

Hydrogen-2 with mass number 2 called deuteron and hydrogen-3 with mass number 3 called triton.

They can be represented as flows:

[tex]^{1}H , \\^{2}H , \\^{3}H[/tex]

Here, the top number is mass number and the bottom number is one which is same for all hydrogen isotopes.

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Final answer:

Identifying unknown compounds is crucial in chemistry as it helps determine their composition, structure, and properties. This knowledge is essential for predicting behavior, reactivity, and potential applications of compounds.

Explanation:

Identifying unknown compounds is important to chemistry because it allows scientists to determine the composition, structure, and properties of those compounds. By knowing the elements present in a compound, their relative amounts, and the molecular or empirical formula of the compound, chemists can make predictions about its behavior, reactivity, and potential applications. For example, knowing the composition of a compound can help scientists understand its toxicity, stability, solubility, and potential uses in various industries.

Biology, chemistry, anatomy, and nuclear physics are different branches within the field of science.

The words biology, chemistry, anatomy, and nuclear physics all belong to the field of science. They are different branches or subdisciplines within the broader category of science. Biology is the study of living organisms and their interactions with the environment. Chemistry focuses on the composition, structure, properties, and changes of substances. Anatomy is the study of the structure of organisms, especially the human body. Nuclear physics is a branch of physics that studies atomic nuclei and their interactions.

The answer I think it is

A. Radiation

a. A colloid is a homogeneous mixture that does not settle out upon standing.

A colloid is a homogeneous mixture where the particle size is intermediate between that of a true solution and a suspension. The particles in a colloid are small enough that they do not settle out upon standing but are large enough to scatter light, exhibiting the Tyndall effect. Examples include milk, fog, and gelatin.

A suspension is a heterogeneous mixture where the particles are large enough to eventually settle out upon standing. An example of a suspension is muddy water.

Solid refers to a state of matter and does not describe the nature of the mixture in terms of settling behavior.

Hydrated refers to a substance that includes water molecules within its structure, typically referring to a crystalline substance like a hydrated salt. It does not describe the mixture's behavior in terms of settling. The correct answer is a.

Complete Question:

A homogeneous mixture that does not settle out upon standing is

a. a colloid

b. a suspension

c. solid

d. hydrated

The formula we can use here is the Plancks equation:

E = h c / ʎ

where h is Plancks constant = 6.626 × 10-34 m2 kg / s, c is speed of light = 3 x 10^8 m/s and ʎ is wavelength = 656.1 x 10^-9 m

Therefore E is:

E = (6.626 × 10-34 m2 kg / s) * (3 x 10^8 m/s) / 656.1 x 10^-9 m

E = 3.03 x 10^-19 J

The energy of one photon of the red line of the hydrogen emission spectrum can be calculated using Planck's equation and it is approximately 3.03 x 10^-19 Joules.

The energy of a photon can be calculated using Planck's equation, E = hv, where 'E' is the energy, 'h' is Planck's constant (6.63 x 10^-34 J.s), and 'v' is the frequency. We can express frequency in terms of speed of light (c) and wavelength (λ) using the equation v = c/λ.

First, convert the wavelength from nm to meters: 656.1 nm = 656.1 x 10^-9 m. Then find the frequency, v = (3.00 x 10^8 m/s) / (656.1 x 10^-9 m) = 4.57 x 10^14 s^-1.

Next, substitute 'v' into Planck's equation to find the energy: E = (6.63 x 10^-34 J.s) x (4.57 x 10^14 s^-1) = 3.03 x 10^-19 J.

Therefore, the energy of one photon of the red line of the hydrogen emission spectrum is approximately 3.03 x 10^-19 Joules.

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Biochemical or organic sedimentary rocks are the class of sedimentary rocks that are deposited from a solution made by organic processes. They form from the accumulation of plant and animal debris.

The class of sedimentary rocks that are deposited from a solution made by organic processes is generally referred to as biochemical or organic sedimentary rocks. These form from the accumulation of plant and animal debris. For example, limestone often forms from the calcium carbonate shells of marine organisms.

Another example is coal, which forms from the remains of plants in swamp environments. Organic processes producing significant amounts of biological debris, result in specific types of sedimentary rocks.

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According to electronic configuration there are 18 electrons that can occupy the 3rd electron shell.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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Answer:

A

Explanation:

Answer:

The answer is A. A homegeneous mixture

Explanation:

A chemical solution is the homogeneous mixture of one or more substances dissolved in another substance in greater proportion. A chemical solution is composed of solute and solvent. The solute is the substance that dissolves and the solvent that dissolves it.

The limiting reactant can be determined by comparing the molar amounts to the stoichiometric ratios. For the given situations, HCl is the limiting reactant in cases (a) and (b), while Zn is the limiting reactant in case (c). This means that the reaction will stop when these reactants are completely consumed.

To determine the limiting reactant in a chemical reaction, we need to compare the molar amounts of the reactants to the stoichiometric ratios given in the balanced chemical equation. For the reaction between Zinc and Hydrochloric Acid: Zn + 2HCl → H₂ + ZnCl₂.

Situation (a): 12 atoms of Zinc and 8 molecules of HCl

Situation (b): 3 moles of Zn and 4 moles of HCl

Situation (c): 40g of Zn and 56g of HCl

Answer: The equilibrium will shifts to the left.

Explanation:

Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.

This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.

[tex]CH_3COOH\rightleftharpoons CH_3COO^-+H^+[/tex]

Thus if [tex]CH_3COONa[/tex] is added it will dissociate to give [tex]CH_3COO^-[/tex] and [tex]Na^+[/tex]

[tex]CH_3COONa\rightarrow CH_3COO^-+Na^+[/tex]

Thus as the concentration of [tex]CH_3COO^-[/tex] increases, the equilibrium will shift in a direction where concentration of [tex]CH_3COO_-[/tex] decrease i.e. the dissociation of [tex]CH_3COOH[/tex] will be further depressed i.e the equilibrium will shift to the left.

Answer:

C

Explanation:

The given biomolecules are lipids and they are insoluble in water.But they can be dissolved in non-polar ionic solutions.

Lipids are essential biomolecules for living organisms. Lipids are composed of long chain fatty acids and triglycerides. They have a hydrophilic head and a hydrophobic tail. This hydrophobicity make them insoluble in water.

Lipids are significant for ion transportation, cell repair, cell membrane formation, ion balancing etc. The structure of lipids are clearly explained by the Fluid -Mosaic model.

Water is a universal solvent and it can dissolve all polar compounds by forming hydrogen bond with them or charge separation.  But, lipids are not soluble in polar compounds such as water and alcohols.

Thus, lipids are insoluble in water, alcohol as well as in oil, since they have a hydrophobic tail. Lipids shows some solubility in non-polar ionic solution.

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Answer: Only the electrons in the outermost shell

Explanation:

Answer:

the hydrogen atoms in heavy water have a neutron in the nucleus, doubling the mass

Explanation:

trust me

The hydrogen in heavy water contains one neutron while the hydrogen in normal water does not have any neutrons. The hydrogen of heavy water is an isotope of hydrogen called deuterium.

Deuterium is one of two stable isotopes of hydrogen. The nucleus of a deuterium atom posseses one proton and one neutron. Deuterium has a natural abundance on the earth of about one atom in 6420 of hydrogen.

Deuterium has approximately 0.0156% of all the naturally occurring hydrogen in the ocean. The abundance of deuterium changes from one type of natural water to another.

Deuterium is the isotope of hydrogen, the mass number of deuterium is 2 while the mass number of hydrogen is 1.

Normal water has a molecular formula of H₂O in which hydrogen is ¹H₁ and the molecular formula of heavy water is D₂O in which D is deuterium has symbol  ²H₁ as it contains one proton and one neutron.

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