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Artist 52 [7]
3 years ago
13

A sample of a compound contains 30.0 g C and 5.05 g H. Its molar mass is 78.12 g/mol. What is the compound’s molecular formula?

Chemistry
1 answer:
aleksklad [387]3 years ago
8 0
You seems to look worried so i will answer your question.
The correct answer is C6H6 as it has a molar mass of 73.07 grams per mole and it is the sample of compound that sums up with <span>78.12 grams per mole.
CH has </span>13.02 grams per mole.<span>C2H2 has a molar mass of 26.04.

Hope this helps you : )
If have more questions feel free to ask me :D</span>
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Answer:

C) exothermic

Explanation:

The given reaction is exothermic.

N₂ + 3H₂  → 2NH₃ + ENERGY

when energy is released the reaction is exothermic and when energy is written on left side with reactant it means energy is added and reaction is endothermic.

Exothermic reaction:

The type of reactions in which energy is released are called exothermic reactions.

In this type of reaction energy needed to break the bonds are less than the energy released during the bond formation.

For example:

Chemical equation:

C + O₂   →  CO₂

ΔH = -393 Kj/mol

it can be written as,

C + O₂   →  CO₂ + 393 Kj/mol

8 0
3 years ago
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Vera_Pavlovna [14]
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If nothing happens said above then it is said that there is no chemical reaction occurs.

Here in the event 1 a clear liquid in one beaker poured into clear liquid in beaker 2 then there is a formation of orange liquid, which means there is a formation of a new colored liquid confirms that the chemical reaction occurred.

4 0
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Read 2 more answers
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Andreas93 [3]

Answer:

the correct answer is Metallic bonding

Explanation:

hope this helps

have a awesome day

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