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3 years ago

What is the main reason for processing coal ore?

Chemistry

2 answers:

seropon [69]3 years ago

7 0

B) To remove inorganic material.

Galina-37 [17]3 years ago

7 0

It is A because to increase heating value removing other materials from coal increases its effectiveness as an energy source, making the coal more valuable. It also reduces transportation costs.

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How do food chains and food webs interact in an ecosystem

miss Akunina [59]

Answer:

There are a great many feeding relationships in any ecosystem, but energy always flows from primary producers to various consumers. These feeding relationships are represented by food chains and food webs. A food chain is a sequence in which organisms transfer energy by eating and being eaten.

Explanation:

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3 years ago

Which structural formula does not represent benzene? a hexagon with nothing drawn inside it a hexagon with a dotted circle drawn

boyakko [2]

Answer:
<span>A hexagon with nothing drawn inside it does not represent Benzene.

Explanation:

Below attached picture contains structures mentioned in given option.

Structure of Option-A is shown in Red Color.
</span>
Structure of Option-B is shown in Blue Color.

Structure of Option-C is shown in Green Color.

Structure of Option-D is shown in Orange Color.

Result:
Except Option-A, all structures represent Benzene. Option-A in fact shows the structure of Cyclohexane.

5 0

3 years ago

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In the rock cycle, where is the energy being released?

Talja [164]

Answer:

the two major sources of energy for the rock cycle are also shown; the sun provides energy for surface processes such as weathering, erosion, and transport, and the Earth's internal heat provides energy for processes like subduction, melting, and metamorphism.

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3 years ago

How many grams would be in 4.45 x 10^23 molecules of N203

SVETLANKA909090 [29]

Answer:

56.24g

Explanation:

To find the mass of N2O3 in 4.45 x 10^23 molecules, it must first be converted to moles by dividing the number of molecules in N2O3 by Avagadro's number (6.02 × 10^23).

number of moles in N2O3 = 4.45 x 10^23 ÷ 6.02 × 10^23

n = 4.45/6.02 × 10^(23 - 23)

n = 0.74 × 10^0

n = 0.74moles.

Using the formula below to find the mass of N2O3;

mole = mass ÷ molar mass

Molar mass of N2O3 = 14(2) + 16(3)

= 28 + 48

= 76g/mol

mass = mole × molar mass

Mass = 0.74 × 76

Mass = 56.24g

3 0

3 years ago

PLZ HELP I WILL GIVE BRAINLY AND 50 POINTS

Oxana [17]

Answer:

1. State problem

2. Form hypothesis

3. Conduct experiment

4. Interpret data

5. Draw conclusion

Explanation:

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3 years ago

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