Free radicals are molecules which: A)Damage cell membranes, DNA, and LDL. B)Steal electrons from molecules of surrounding tissues. C)All answers are correct. D)Are highly unstable. E)Are missing an electron.

Answers

Answer 1

Answer: C) All answers are correct. Free radicals damage cell membranes, DNA, and LDL, steal electrons from molecules of surrounding tissues, are highly unstable, and are missing an electron

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A solution containing large amount of solute in comparison to solvent is... A ) aqueous,b. concentrated,
c. Diluted, and
d. soluble

Answers

A solution containing large amount of solute in comparison to solvent is concentrated. Meaning the solute's concentration is high. The answer to this question is letter "B" or "B. Concentrated". I hope this helps you on your assignment.

the answer will be b)

How many atoms are in 0.750 moles of zinc?

Answers

There are approximately 4.52 x 10^23 atoms in 0.750 moles of zinc.

How to find the number of atoms

To determine the number of atoms in a given amount of a substance, you can use Avogadro's number, which is approximately 6.022 x 10^23 atoms/mol.

Given that you have 0.750 moles of zinc, you can calculate the number of atoms using the following steps:

Multiply the given number of moles by Avogadro's number:

0.750 moles * (6.022 x 10^23 atoms/mol) = 4.5165 x 10^23 atoms

Round the result to an appropriate number of significant figures:

Since the value given has three significant figures, the final answer should be rounded accordingly. Therefore, the number of atoms in 0.750 moles of zinc is approximately 4.52 x 10^23 atoms.

So, there are approximately 4.52 x 10^23 atoms in 0.750 moles of zinc.

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(doesn't really matter that it's zinc :) )
It is $0.75*N_A$ , where $N_A=6.023*10^(23)$ (in some books 6.022).

ZnS has two common polymorphs: Sphalerite and Wurtzite. Based on the analysis of Medelung constants alone, predict which polymorph should be more stable. Assume that the Zn-S distances in the two polymorphs are identical.

Answers

Answer:

Wurzite has a higher Madelung constant when compared with Sphalerite therefore Wurizite is more stable.

Explanation:

Zinc Sulphide is a chemical compound that exhibits polymorphism. This means Zinc Sulphide can exists in different forms as a compound. Zinc Sulphide has two common polymorphs named; Wurtzite and Sphalerite .

This two polymorphs are crystalline in structure. Wurtzite is hexagonal in shape while Sphalerite is cubic in shape.

Madelung constant was named after German Physicist Erwin Madelung. Madelung constant is dependent on the the way ions are arranged in a solid substance or molecule. It is used to calculate the amount of energy required to move an ion from one point to the another in a crystal substance.

Madelung constant for Wurtzite is 1.64132 and for Sphalerite is 1.63806. Due to the fact that Wurtzite has a slightly higher Madelung constant that Sphalerite, it tends to be more stable than Sphalerite.

The concept of an ideal gas is used to explain(1) the mass of a gas sample(2) the behavior of a gas sample(3) why some gases are monatomic(4) why some gases are diatomic

Answers

Ideal gas is used to explain the behavior of a gas sample. In ideal gas law, the equation is PV=nRT where R has a constant of 0.0821L.atm/mol.K. It can explain the behaviior of a gas in three types: mole, mass and density. The ideal gas often observed in a high temperature with low pressure as to potential energy becomes less significant compared to the kinetic energy.

Final answer:

The concept of an ideal gas is chiefly used to explain the behavior of a gas sample according to the ideal gas law. It's not primarily used to determine the mass of a gas sample, or whether a gas is monatomic or diatomic.

Explanation:

The concept of an ideal gas is primarily used to explain the behavior of a gas sample. An ideal gas is a theoretical gas composed of randomly moving, non-interacting point particles. It follows the ideal gas law which is PV=nRT, where P is the pressure, V is the volume, n is the number of moles, R is the universal gas constant, and T is the absolute temperature. The ideal gas law allows us to predict how a gas will behave under different conditions of pressure, volume, and temperature.

The mass of a gas sample is inherently tied to the moles of gas, per the molar mass concept in the ideal gas law. As for whether a gas is monatomic or diatomic, this depends on the atomic structure and bonding of the specific gas species, and not the ideal gas concept itself.

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In which of these substances are the molecules probably moving most quickly?solid iron at −45°C
solid iron at 300°C
liquid iron at 1600°C
liquid iron at 1800°C

Answers

The substance with molecules that are probably moving most quickly is liquid iron at 1800°C. This is because the particles of the liquid iron can move or slide past each other due to the small space available for movement. It cannot be compressed further due to the repulsive forces that acts between them. And also, the temperature is increases which causes for more thermal vibration of atoms.

Answer:

The answer is D

Explanation:

HELP!!!! I HAVE 2 MINUTES!!!A substance placed into an open plastic container at room temperature exerts a force against the bottom of the container but not the sides of the container. What is the most likely phase of this substance?
A. gas
B. solid
C. liquid
D. plasma

Answers

Answer:

a solid

Explanation:

because because gas would excerpt forced throughout the whole container and plasma would be too hot for the plastic container and liquid would flow throughout the container touching the sides and solid is the only one that would probably only touch the bottom of the plastic container exerting force through there

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