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2 years ago

13.

1 answer:

6 0

13} Absolute dating
14} The main causes of water pollution are most often man made andcaused by increasing industrialization and human activities. Mostly the water bodies get polluted with municipal, industrial and agricultural waste and their unplanned leaking, run off, dumping and disposal.
15} Removing some of the overpopulated animals from a forest
16} mechanical and chemical
17} Yes, rocks at the surface can change from any type to igneous
18} There are two main methods determining a fossils age, relative dating and absolute dating. Relative dating is ... For example if you have a fossil trilobite and it was found in the Wheeler Formation. The Wheeler ... Scientists can use certain types of fossils referred to as index fossils to assist in relative dating

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Which of the subshells below do not exist due to the constraints upon the angular momentum quantum number?A) 2dB) 2sC) 2pD) all

Gnom [1K]

Answer:

Option A): Due to the constraints upton the angular momentum quantum number, the subshell 2d does not exist.

Explanation:

The angular momentum quantum number, identified with the letter l (lowercase L), number is the second quantum number.

This number identifies the shape of the orbital or kind of subshell.

The possible values of the angular momentum quantum number, l, are constrained by the value of the principal quantum number n: l can take values from 0 to n - 1.

So, you can use this guide:

Principal quantum Angular momentum Shape of the orbital

number, n quantum number, l

1 0 s

2 0, 1 s, p

3 0, 1, 2 s, p, d

Hence,

the subshell 2d (n = 2, l = 2) is not feasible.

2s (option B) is possible: n = 2, l = 0

2p (option C) is possible: n = 2, l = 1

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3 years ago

Which gas is most abundant in Earth’s atmosphere?

scoundrel [369]

Answer:

Nitrogen

Explanation: nitrogen is around 70% of the air hope this helps god bless

3 0

3 years ago

Read 2 more answers

3. What is the mass % of a solution that contains 36g KCl in 475g of water?

stira [4]

Answer:

%KCl = 7.05%

%Water = 92.95%

Explanation:

Step 1: Given data

Mass of KCl (solute): 36 g

Mass of water (solvent): 475 g

Step 2: Calculate the mass of the solution

The mass of the solution is equal to the sum of the masses of the solute and the solvent.

m = 36 g + 475 g = 511 g

Step 3: Calculate the mass percentage of the solution

We will use the following expression.

%Component = mComponent/mSolution × 100%

%KCl = 36 g/511 g × 100% = 7.05%

%Water = 475 g/511 g × 100% = 92.95%

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2 years ago

An ice cube and a scoop of table salt are left outside on a warm sunny day. explain why the ice cube melts and the salt does not

Anna11 [10]

The melting point of ice is 0 degrees Celcius, which means it exists as a liquid for any temperatures above 0 degrees. The melting point of salt is approximately 800 degrees Celcius, which is way greater than the melting point of ice. This means that for temperatures below 800 degrees, salt exists as a solid.

The temperature of the area where they were placed we can assume was somewhere between 0 and 800 degrees, greater than the melting point of ice but less than the melting point of salt. This why the ice melted but the salt did not.

I hope this helps!

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2 years ago

3.1.1. Describe FIVE functions of water in plants

Veseljchak [2.6K]

Explanation:

The various functions of water in plants include: maintaining cell turgidity for structure and growth; transporting nutrients and organic compounds throughout the plant; comprising much of the living protoplasm in the cells; serving as a raw material for various chemical processes, including photosynthesis; and, through transpiration, buffering the plant against wide temperature fluctuations.

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2 years ago