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Shalnov [3]
3 years ago
7

Which is the best definition of an ecosystem?

Chemistry
2 answers:
sergey [27]3 years ago
8 0
Which is the best definition of an ecosystem?

A the nonliving things in a specific area

B all the plants and animals in a specific area

C the living things in a specific area

D the weather and climate in a specific area

E all the living and nonliving things in a specific area

E
vredina [299]3 years ago
6 0

Answer:

last one is the correct and most suitable option.

Hope it helps!!!

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If your end product is 1.5 moles of KMnO 4 how many moles of manganese oxide were used in the reaction? The equation for the pro
vovikov84 [41]

Answer:

1.5 moles

Explanation:

The equation of the reaction is given as:

2 MnO2 + 4 KOH + O2 --> 2KMnO 4 + 2KOH + H2

From the equation,

2 moles of MnO2 produces 2 moles of KMnO4

x moles of MnO2 would produce 1.5 moles of KMnO4

2 = 2

x = 1.5

Solving for x;

x = 1.5 * 2 / 2

x = 1.5 moles

4 0
3 years ago
HNO3 and H2CO3 are examples of ?
Basile [38]
A) acids because they start with h
7 0
3 years ago
What is the total number of moles represented by 20 grams of CACO3
Nutka1998 [239]

Answer:

B. 0.2.

Explanation:

  • We can use the relation:

<em>n = mass/molar mass</em>

mass of CaCO₃ = 20 g, molar mass of CaCO₃ = 100.0869 g/mol.

<em>∴ n = mass/molar mass = </em>(20 g)/(100.0869 g/mol) <em>= 0.1998 ≅ 0.2 mol.</em>

<em></em>

<em>So, the right choice is: B. 0.2.</em>

8 0
3 years ago
A/an _______ is the smallest unit of matter that has the characteristics of a chemical element.
julsineya [31]

Answer:

The answer is atom.

Explanation:

7 0
3 years ago
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Escriba 4 ideas sobre que sucede cuando la radiación solar llega a la tierra​
poizon [28]

Answer:

La radiación UV-B es parcialmente absorbida por el ozono y llega a la superficie de la tierra, produciendo daño en la piel. Ello se ve agravado por el agujero de ozono que se produce en los polos del planeta.

Explanation:

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3 years ago
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