Answer: Option (C) is the correct answer.
Explanation:
Bromine is a group 7A element with atomic number 35. Whereas magnesium is a group 2A element with atomic number 12.
This means that a neutral atom of bromine has more number of electrons as compared to a neutral atom of magnesium. Hence, size of a bromine atom will definitely be larger than the size of a magnesium atom.
Thus, we can conclude that we know that a neutral atom of bromine (Br) is larger than a neutral atom of magnesium (Mg) because atoms with many electrons are always larger than atoms with fewer electrons, a neutral atom of bromine has 35 electrons while neutral atom of magnesium has only 12.
Based on the structure, which material will dissolve this biomolecule the best? dilute alcohol water oil ionic solution
The given biomolecules are lipids and they are insoluble in water.But they can be dissolved in non-polar ionic solutions.
What are lipids?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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The major portion of an atom’s volume is(based on the gold foil experiment)?
After a student makes a solution, its temperature rises.
Which term describes this process?
endothermic chemical reaction
exothermic chemical reaction
exothermic solution formation
endothermic solution formation
What do the words in this group have in common biology chemistry anatomy nuclear physics?
Biology, chemistry, anatomy, and nuclear physics are different branches within the field of science.
Explanation: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.
Is a candle smelling like a pine tree is that a chemical change chemical property physical change or physical property?
Which element among elements 2, 4, and 6 has the lowest ionization energy?
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.
Can the amount of sugar be measured in a liquid using a laser pointer and a prism?
Distilled water has a hydronium ion concentration of 1
What is the pH of distilled water?
7
–7
10
1 × 10 –7
What is the Lewis dot structure Ch2Cl2
In the science lab, students are testing solutions as acids or bases. the ph level of solution "x" was determined to be an 8. what is solution "x"?
Write the element symbol for the element with the abbreviated electron configuration [ne]3s23p2.
Give an example of a two phase mixture and describe how you would separate the substances
Why is identifying unknown compounds important to chemistry?
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.
Consider the chemical equilibrium of the following reaction CH3COOH CH3COO– (aq) + H+(aq) What will happen to the chemical equilibrium of the solution if CH3COONa is added? The equilibrium will shifts to the right. The equilibrium will shifts to the left. The equilibrium will be unaffected. The equilibrium will be lost.
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:
Sublimation and boiling both happen at the surface of the substance.
a. True
b. False
Which was the limiting reactant: the zinc or the hydrochloric acid? Remember that the limiting reactant is completely consumed in a reaction and no new product is formed unless more of the limiting reactant is added.
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
According to the balanced equation, 1 atom of Zn reacts with 2 molecules of HCl. Therefore, 12 atoms of Zinc would require 24 molecules of HCl. Since only 8 molecules of HCl are available, HCl is the limiting reactant.Situation (b): 3 moles of Zn and 4 moles of HCl
The balanced equation indicates that 1 mole of Zn reacts with 2 moles of HCl. Thus, 3 moles of Zn would require 6 moles of HCl. As there are only 4 moles of HCl, HCl is again the limiting reactant.Situation (c): 40g of Zn and 56g of HCl
Converting the masses to moles: Molar mass of Zn is approximately 65.38 g/mol, so 40g of Zn is approximately 0.612 moles. Molar mass of HCl is approximately 36.46 g/mol, so 56g of HCl is approximately 1.54 moles. From the balanced equation, 0.612 moles of Zn would require 1.224 moles of HCl. Since there are 1.54 moles of HCl, Zn is the limiting reactant.Will all cars have roughly the same amount of force available
Which phrase describes a solution?
A. A homegeneous mixture
B. A graduated substance
C. A heterogeneous mixture
D. A primary mixture of elements
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.
A molecule that is composed only of chains and rings of hydrogen and carbon is called a
How is hydrogen in heavy water different from hydrogen in normal water?
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.
What is 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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What element has its 7 valence electrons in energy level 4 in s and p orbitals?
Classify these bonds as ionic, polar covalent, or nonpolar covalent na-f
Explain how dipole interactions and dispersion forces are related
What is the class that includes sedimentary rocks which are deposited from a solution made by organic processes?
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.
Explanation: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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Which is a pure substance? A. sugar B. trail mix C. leaf salad D. sugar water
Answer:
A
Explanation:
What is the maximum number of electrons that can occupy the 3rd electron shell
According to electronic configuration there are 18 electrons that can occupy the 3rd electron shell.
What is electronic configuration?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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What do Lewis structures show?
Question 7 options:
only electrons that are unavailable for bonding
all but the valence electrons
only valence electrons
all electrons
Answer: Only the electrons in the outermost shell
Explanation:
What is the transfer of energy by electromagnetic waves? A) radiation B)
conduction C) convection D) thermal energy
The answer I think it is
A. Radiation
The red line of the hydrogen emission spectrum has a wavelength of 656.1 nm. Calculate the energy of one photon
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.
Explanation: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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The wall of the flask is periodically rinsed with the previously boiled deionized water from the wash bottle. does this titrimetric technique result in an increase, a decrease, or have no effect on the reported acetic acid in the vinegar