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3 years ago

What are all of the living and nonliving things in an area called?

Chemistry

2 answers:

SOVA2 [1]3 years ago

7 0

Ecosystem is were non living and living things live

yan [13]3 years ago

4 0

Answer:

Ecosytem

Explanation:

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When you receive a loan, the money the lender gives you is called the ____________. A. Interest B. Line of credit C. Principal D

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C. Principal !!!!!!!!!

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4 years ago

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A person produces two sound waves with a flute, one immediately after the other. Both sound waves have the same pitch, but the s

Nitella [24]

Answer:

A) wavelength

Explanation:

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3 years ago

Elements occur in a number of isotopic forms. In this problem, you will learn about the notation used to distinguish different i

alina1380 [7]

Answer:

Number of protons, Z = 14
Number of neutrons, N = 14

Explanation:

1) About isotopes:

Isotopes are different kind of atoms of the same element. Hence, they have the atomic number (Z), which is the number of protons, the same number of electrons (talking about to neutral atoms, not ions), and different number of neutrons N).

This is, it is the number of neutrons what distinguish different isotopes of an element.

2) About the notation used to distinguish different isotopes:

A superscript and a subscript, both to the left of the chemical symbol of the element, are used to distinguish different isotopes:

A ←------------- This superscript tells the mass number of the isotope

X ←--------- This is the chemical symbol of the element

Z ←-------------- This subscript is the atomic number of isotope

In our case, the notiation for the isotope of silicon is: ²⁸₁₄ Si

So, we have:

28 is the mass number (A)
14 is the atomic number (Z)
Si is the chemical symbol.

Now, you can answer the questions of the part A:

Number of protons: Z = 14

Number of neutrons N:

mass number = number of protons + number of neutrons

A = Z + N

⇒ N = A - Z = 28 - 14 = 14

In conclusion:

Number of protons, Z = 14
Number of neutrons, N = 14

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3 years ago

Which molecules are pure elements?

Elenna [48]

Well none since molecules are a group of two or more atoms electrically bonded with one another. However, there are gases that does not naturally bond due to their stability and can be found in nature as pure elements. But these are not considered as molecules.

(By the way, these gases are the noble gases that can be found on the last column of the periodic table)

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4 years ago

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Percent Error Problems – Find the percent error for each problem below.

Citrus2011 [14]

% error = 3.4 %

Percent error = |accepted value - experimental value|/accepted value × 100%

∴ % error = |355 mL – 343 mL|/355 mL × 100 % = |12|/355 × 100 % = 3.4 %

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3 years ago

What are all of the living and nonliving things in an area called?​

What are all of the living and nonliving things in an area called?