The hole in the ozone layer can lead to increases in skin cancer.
a. True
b. False

Answers

Answer 1

Answer:

Answer : The correct option is, (a) true

Explanation :

Ozone layer : It is a layer which is present in the stratosphere region. Ozone layer is the layer which absorbs more amount of the ultraviolet rays which is the more harmful rays for us. That means ozone layer protect us from the harmful rays (UV rays). Ultraviolet rays causes the skin cancer. When the ultraviolet rays reaches directly to the earth, it cause many type of diseases.

When the hole in the ozone layer then it can lead to increases in skin cancer.

Hence, the given statement is true.

Answer 2

Answer: A. True. The ozone layer is very critical to our health.

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Ammonium hydroxide ionizes as follows: NH4OH(s) NH4 +(aq) + OH-(aq). If an excess of ammonium salt, such as NH4Cl (which ionizes to give NH4 +(aq) ions) is added to the equilibrium shown above, you could predict that the result will be to....

Answers

Answer: The dissociation of the base will be further suppressed.

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.

For the given equation:

$NH_4OH(s)\rightleftharpoons NH_4^+(aq)+OH^-(aq)$

If an excess of ammonium salt, such as $NH_4Cl$ (which ionizes to give $NH_4^+$ (aq) ions)

$NH_4Cl\rightarrow NH_4^++Cl^-$

If the concentration of $NH_4^+$ that is the product is increased, so according to the Le-Chatelier's principle, the equilibrium will shift in the direction where decrease of concentration of $NH_4^+$ takes place. Therefore, the equilibrium will shift in the backward direction and the ions will start associating to form $NH_4OH$ .

Decrease the concentration of OH-

methane and hydrogen sulfide form when hydrogen reacts with carbon disulfide. identify the excess reactant and calculate how much remains after 36 L o fH2 reacts with 12 L of CS2 all at STP

Answers

At STP, 1 mol of gas occupies 22.4 L of volume. Using this conversion we the starting amounts of the reactants:
1.6071 mol H2
.5357 mol CS2
The balanced equation is:
4H2 + CS2 -> CH4 + 2H2S
This means that 4 moles of H2 reacts with 1 mole of CS2.
Multiplying this ratio with each of the amounts of the reactants:
required CS2 based on amount of H2 = 0.4018 mol CS2
required H2 based on amount of CS2 = 2.1428 mol H2
Therefore, the excess reactant is CS2. To calculate how much is left, we simply subtract the amount of the reactant CS2 with the required amount based on the amount of H2:
0.5357 mol - 0.4018 mol = 0.1339 mol

Of these four liquids, which is the most viscous? A. H2O. . B. CCl4. . C. C2H12O6. . D. Hg

Answers

Of these four liquids, which is the most viscous?

Answer: Out of all the options presented above the one that is the most viscous liquid is answer choice D) Hg. Mercury has a Dyn. viscosity of 1.55 mPa·s. This liquid is often used for thermometers, barometers, manometers and many other devices.

I hope it helps, Regards.

Boyle's law states that thea. volume of a gas varies inversely with pressure.
b. volume of a gas varies directly with pressure.
c. temperature of a gas varies inversely with pressure.
d. temperature of a gas varies directly with pressure.

Answers

The correct answer is A. The volume of a gas varies inversely with pressure. Boyle's law is one of the gas laws we have. According to this law, at a fixed amount of an ideal gas which is at constant temperature, the pressure and volume are inversely proportional with each other.

Answer:

the answer is A pls mark me

Explanation:

Select all that apply. The requirements for one type of atom to substitute for another in a solid solution are:a. All substitutions must be limited to the same element.
b. An atom must be identical in size.
c. An atom must be similar in size.
d. The substituting atom must be from the same period. E) The substituting atom must be from the same group.

Answers

The correct answer is options c and e.

A solid solution is basically a multi-component framework that comprises a mixture of two or more elements exhibiting a similar crystal lattice. The examples of solid solutions are alloys.

The requirements for one kind of atom to substitute for another in a solid solution are:

1. The size of the atom must be similar.

2. The substituting atom must be from a similar group.

Answer:

An atom must be similar in size.

The substituting atom must be from the same group.

Explanation:

A solid solution is a solid mixture containing a minor component uniformly distributed within the crystal lattice of another component called the major component. Metal alloys are typical examples of a solid solution.

Note that only atoms of similar size can substitute each other in a solid solution. Usually atoms of elements in the same group have atomic sizes that vary within narrow ranges. Hence atoms of elements in the same group have similar atomic sizes and can substitute each other in a solid solution.

Which of the following types of radiation has the greatest ability to penetrate matter

Answers

You did not specify the types, but I believe the answer would be gamma radiation.

Final answer:

Among alpha,beta, neutron, and gamma radiations, gamma radiation has the greatest ability to penetrate matter. It can pass through dense and thick materials, including a few feet of concrete and even lead.

Explanation:

When comparing the ability of different types of radiation to penetrate matter, from least penetrating to most penetrating, the sequence is alpha < beta < neutron < gamma. This means the gamma radiation is the most penetrating type of radiation. Alpha radiation has the least penetration ability and can be blocked by even a thin sheet of paper. Beta radiation has slightly higher penetration power, able to go through about 3mm of aluminum, for instance. Gamma radiation, on the other hand, can penetrate much denser and thicker materials. For example, high-energy gamma radiation can pass through a few feet of concrete, and even lead to a depth of 2 or more centimeters.