What does the electron sea model for metals suggest?A) valence electrons drift freely around the metal anions
B) valence electrons are anchored to specific metal cations
C) valence electrons drift freely around the metal cations
D) electrons idle around the metal cations
E) valence electrons are anchored to specific metal anions

Answers

Answer 1

Answer:

Answer: Option (C) is the correct answer.

Explanation:

In electron sea model, the valence electrons in metals are delocalized instead of orbiting around the nucleus.

Therefore, this delocalization forms a sea of electrons. These electrons are free to move within the metal atoms.

Thus, we can conclude that the electron sea model for metals suggest that valence electrons drift freely around the metal cations.

Answer 2

Answer: c. valence electrons drift freely around the metal cations.

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Na+ + Cl– NaCl Which statement best describes the relationship between the substances in the equation?

Answers

Answer : The number of sodium ions is equal to the number of formula units of salt.

Explanation : In the given reaction of NaCl the statement which describes it the best is that the number of sodium ions is found to be same along with the formula units in the product side.

$Na^(+)$ + $Cl^(-)$ ----> NaCl.

Its clear from the equation that one mole of Na and one mole of Cl combines together to give the product, which is one mole of NaCl. The number of ions on both the sides are equal.

The correct answer for the question that is being presented above is this one: "The number of sodium ions is equal to the number of formula units of salt." The statement that best describes the relationship between the substances in the equation is that the number of sodium ions is equal to the number of formula units of salt.

Describe how to properly measure the volume of a liquid.

Answers

Use a graduated cylinder.

The best way to measure it usually is to use a beaker or graduated cylinder.

in a school’s laboratory, students require 50.0 mL of 2.50 M H2SO4 for an experiment, but the only available stock solution of the acid has a concentration of 18.0 M. What volume of the stock solution would they use to make the required solution? Use mc018-1.jpg.

Answers

Ans: Volume of stock H2SO4 required = 6.94 ml

Given:

Concentration of stock H2SO4 solution M1 = 18.0 M

Concentration of the final H2SO4 solution needed M2 = 2.50 M

Final volume of H2SO4 needed, V2 = 50.0 ml

To determine:

Volume of stock needed, V1

Explanation:

Use the dilution relation:

$M1V1 = M2V2\n\nV1 = (M2V2)/(M1) \n\nV1 = (2.50 M * 50.0 ml)/(18.0 M) = 6.94 ml$

Hello!

In a school’s laboratory, students require 50.0 mL of 2.50 M H2SO4 for an experiment, but the only available stock solution of the acid has a concentration of 18.0 M. What volume of the stock solution would they use to make the required solution?

We have the following data:

M1 (initial molarity) = 2.50 M (or mol/L)

V1 (initial volume) = 50.0 mL → 0.05 L

M2 (final molarity) = 18.0 M (or mol/L)

V2 (final volume) = ? (in mL)

Let's use the formula of dilution and molarity, so we have:

$M_(1) * V_(1) = M_(2) * V_(2)$

$2.50 * 0.05 = 18.0 * V_(2)$

$0.125 = 18.0\:V_2$

$18.0\:V_2 = 0.125$

$V_2 = (0.125)/(18.0)$

$V_2 \approx 0.00694\:L \to \boxed{\boxed{V_2 \approx 6.94\:mL}}\:\:\:\:\:\:\bf\green{\checkmark}$

Answer:

The volume is approximately 6.94 mL

_______________________________

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Quartz, which contains one silicon atom and two oxygen atoms per formula unit, is the second-most-common mineral on Earth after feldspar. It is used as a gemstone, as well as in pressure gauges, oscillators, resonators, wave stabilizers, heat-ray lamps, and prismastic lenses, and in the manufacture of glass, paints, abrasives, and precision instruments such as watches. What is the chemical formula for quartz?

Answers

The chemical formula for quartz is SiO_2

The chemical formula for quartz is SiO_2, which represents one silicon atom and two oxygen atoms in each formula unit.

Quartz is composed of silicon (Si) and oxygen (O) atoms bonded together in a specific arrangement. Its chemical formula, SiO2, represents this composition.

In quartz, each silicon atom is bonded to two oxygen atoms, and each oxygen atom is bonded to one silicon atom. This arrangement forms a three-dimensional network structure, making quartz a crystalline mineral.

The chemical formula SiO_2 provides a precise representation of the elements and their ratios in quartz.

Silicon and oxygen are the two elements that make up the mineral, and they are combined in a 1:2 ratio, meaning that for every silicon atom, there are two oxygen atoms.

This ratio is essential for understanding the stoichiometry and structure of quartz.

Quartz has various applications due to its unique properties, such as its hardness, transparency, and ability to transmit certain wavelengths of light, making it valuable in electronics, optics, and various industrial processes.

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What chemical change is magnetizing steel

Answers

Magnetizing steel is a physical change, not a chemical change.

Magnetizing steel is a physical change, not a chemical change because it does not change the chemical composition of the steel.

A chemical change is a change in which new substances are formed. This is because the atoms in the original substances are rearranged to form new atoms or molecules. There is no chemical change when magnetizing steel. For example, when iron rusts, it reacts with oxygen to form a new substance called iron oxide.

A physical change is a change in which the form of a substance is changed, but the substanceitself is not changed. For example, when you melt ice, you are changing the form of water from a solid to a liquid, but the water itself is not changed.

When you magnetize steel, you are simply aligning the magnetic domains in the steel. Magnetic domains are regions of a material that have a net magnetic field. When the magnetic domains are aligned, the steel becomes magnetized.

Magnetizing steel does not change the chemical composition of the steel. The steel is still made up of the same atoms, and the atoms are still arranged in the same way. The only difference is that the magnetic domains are aligned, which gives the steel its magnetic properties.

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A veterinarian picks up a small dog from the floor and places it on the operating table. if the dog weighs 80N and the operating table is 1.25m high, how much work does the veterinarian do?

Answers

The amount of work can be measured by multiplying the force done to the distance it is subjected to. In this problem the dog weighs 80N. Newton is a unit of force. The operating table is 1.25m high. This is the distance. Then work is equal to 100J.

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What is the best way to compare a concentrated solution to a dilute solution, given the same volume of solution?The concentrated solution has less solute than the dilute solution.a) The concentrated solution has the same amount of solute as the dilute solution.b) The concentrated solution has more solute than the dilute solution.c) The concentrated solution has a different amount of solute than the dilute solution.d) The concentrated solution has the same amount of solute as the dilute solution.