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marishachu [46]
3 years ago
14

What is the most likely consequence of open pit mining on plant life? a. A dramatic reduction in the variety of plant species b.

An increase in the number of plant species c. The complete loss of plant life in the area occupied by the surface mine d. A temporary decrease in plant populations please select the best answer from the choices provided.
SAT
2 answers:
Alika [10]3 years ago
4 0

Answer:

2

Explanation:

Because if you add 1  to 8 you get 9 then subtract 9 by 7 then and your answer is 2

erastova [34]3 years ago
4 0

Answer:

2

Explanation:

Because if you add 1  to 8 you get 9 then subtract 9 by 7 then and your answer is 2

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Forests when left to thrive form a _______, that remove carbon dioxide from there air.
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Explanation:

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What maximum amount of ammonia in kilograms can be synthesized from 5.22 kg of h2 and 31.5 kg of n2?
Fiesta28 [93]

Consider the unbalanced reaction,

H₂ + N₂   ===>   NH₃

Balance it to get

3 H₂ + N₂   ===>   2 NH₃

This tells you that for every 3 moles of H₂ and 1 mole of N₂ among the reactants, 2 moles of NH₃ are produced.

Look up the molar masses of each component element:

• H : 1.008 g/mol     ===>   H₂ : 2.016 g/mol

• N : 14.007 g/mol     ===>   N₂ : 28.014 g/mol

• NH₃ : 17.031 g/mol

Convert the given mass to moles for each reactant:

• H₂ :

(5.22 kg) × (1000 g/kg) × (1/2.016 mol/g) ≈ 2589.29 mol

• N₂ :

(31.5 kg) × (1000 g/kg) × (1/28.014 mol/g) ≈ 1124.44 mol

Now,

(2589.29 mol H₂) : (1124.44 mol N₂) ≈ (2.30 mol H₂) : (1 mol N₂)

so that the amount of N₂ consumed is

(2589.29 mol H₂) × (1 mol N₂) / (3 mol H₂) ≈ 863.095 mol N₂

leaving an excess of about 261.343 mol N₂, and producing

(2589.29 mol H₂) × (2 mol NH₃) / (3 mol H₂) ≈ 1726.19 mol NH₃

Convert this to a mass :

(1726.19 mol) × (17.031 g/mol) × (1/1000 kg/g) ≈ 29.3987 kg

So, up to 29.4 kg of NH₃ can be synthesized.

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3 years ago
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Komok [63]

The element that would melt at a higher temperature than the standard temperature is iron (Fe).

<h3>Melting point</h3>

The term melting point refers to the point where a solid is converted to a liquid. A pure substance has a sharp melting point while an impure substance melts over a temperature range.

Metals have a very high melting point hence the element that would melt at a higher temperature than the standard temperature is iron (Fe).

Missing parts:

At standard pressure, which element has a melting point higher than standard temperature?

(1) F2 (3) Fe

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Learn more about melting point: brainly.com/question/491382

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