CHEMISTRY HIGH SCHOOL

The diagram below shows different layers of sedimentary rocks.Picture showing seven layers of rocks of different colors labeled A, B, C, D, E, F, and G from top to bottom; A and B are parallel horizontal layers at the top of the diagram and C, D, E, F, and G are slanted layers with C closest to the surface and G at the bottom.

Based on the diagram, which of these inferences is most likely correct?

A.Layer A is older than Layer B.
B.Layer C is older than Layer E.
C.Layer F is younger than Layer D.
D.Layer B is younger than Layer G.

Answers

Answer 1

Answer: D. layer B is younger than layer G.

Answer 2

Answer:

Answer:

The correct answer is D.

Layer B is younger than layer G

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A gas occupying a volume of 381 mL at a pressure of 5 mmHg is allowed to expand until the pressure reaches 589 mmHg. What is the final volume in mL?

Answers

The final volume of the gas is approximately 3.24 mL when the pressure has increased from 5 mmHg to 589 mmHg.

To solve this problem, we can use the combined gas law, which relates the pressure, volume, and temperature of a gas. The formula for the combined gas law is:
P1V1/T1 = P2V2/T2
where P1, V1, and T1 are the initial pressure, volume, and temperature of the gas, and P2, V2, and T2 are the final pressure, volume, and temperature of the gas.
In this problem, we are given the initial volume (V1 = 381 mL) and pressure (P1 = 5 mmHg), and we want to find the final volume (V2) when the pressure has increased to 589 mmHg. We can assume that the temperature remains constant.
We can start by rearranging the combined gas law to solve for V2:
V2 = (P1V1/T1) x (T2/P2)
Since the temperature is constant, we can simplify the formula to:
V2 = (P1V1)/P2
Plugging in the values we know, we get:
V2 = (5 mmHg x 381 mL)/589 mmHg
Simplifying, we get:
V2 = 3.24 mL

For such more questions on pressure

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Acid precipitation can be traced back to the burning of fossil fuels.
a. True
b. False

Answers

The statement that ‘Acid precipitation can be traced back to the burning of fossil fuels.’ Is true. The answer is letter A. Burning of fossil fuels may emit harmful gases that is toxic to the atmosphere and the surrounding beings.

Final answer:

Acid precipitation is caused by the release of pollutants such as sulfur dioxide and nitrogen oxides when fossil fuels are burned. These pollutants combine with water in the atmosphere to form acids, which can fall to the earth as precipitation.

Explanation:

The statement in the question is True. Acid precipitation can indeed be traced back to the burning of fossil fuels. When we burn fossil fuels like coal, oil, and gas, they release pollutants into the atmosphere. These pollutants include sulfur dioxide and nitrogen oxides, which can combine with water in the atmosphere to form sulfuric acid and nitric acid. These acids can fall to the earth in the form of precipitation, such as rain, snow, or fog, hence the term 'acid precipitation'. This process can have harmful impacts on the environment, including pollution of bodies of water and damage to vegetation.

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1. How did Dmitri Mendeleev deal with elements that had not yet been discovered?A. He left blanks for them in his periodic table, as he predicted they would be discovered.
B. He gave them names and properties and placed them in the table.
C. He created them in his laboratory and placed them in the table.
D. He ignored them, placing them in the table and shifting others when they were discovered. 2. Which of the following elements have properties similar to those of astatine (At)? A. F, Br, I B. Ar, S, P C. F, Ar, Ne D. Na, Mg, Al 3.What is true of the ionic size of the elements in a group as one moves from top to bottom in that group?
A. Ionic size stays the same within the group.
B. Ionic size does not vary in any predictable way within the group.
C. Ionic size decreases from top to bottom within the group.
D. Ionic size increases from top to bottom within the group.

Answers

The most sensible answer for the first qurstion is definitely A.He left blanks for them in his periodic table, as he predicted they would be discovered.
He couldn't just just imagine index and go with a flow, he left space for it in order to dicrover it through reactions.
What about the next question, the answer is A. F, Br, I, its properties similar to those of astatine (At).
The last one :D. Ionic size increases from top to bottom within the group.

What is the isotope and isotopic notation symbol for Z = 29, A = 65?

Answers

Isotopes are atoms with the same number or protons and electrons but different numbers of neutrons.
Here, we got Z = 29 so the charge of the nucleus is 29, and A is the atomic mass.
Since the atom number (Z) is 29, so i guess the isotope is the Copper.
Isotopic notation: $Cu_(29)^(65)$

Hope this Helps :)

Final answer:

The isotope with atomic number Z = 29 and atomic mass A = 65 is for Copper and its isotopic notation is 65Cu.

Explanation:

The isotope with atomic number Z = 29 and atomic mass A = 65 is for the element Copper (Cu). To write this in isotopic notation, you represent it as 65Cu. Here, the atomic number Z (number of protons) is represented by Cu and the mass number A (number of protons + neutrons) is represented by the superscript number 65. Thus, the isotope notation symbol for this is is 65Cu.