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NARA [144]
3 years ago
14

If 655j are added to ethanol (grain alcohol) and its temperature rises from 18.2 C to 32.8 C, what is the mass of the ethanol sa

mple?
Chemistry
1 answer:
WARRIOR [948]3 years ago
5 0
G= 6.96 kcal/g is the answer to the question


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Zinc Sulfide reacts with oxygen according to the reaction:
zhuklara [117]

The amount in moles of the excess reactant left is 0.5 mole

<h3>Balanced equation</h3>

2ZnS (s) + 3O₂(g) --> 2ZnO (s) + 2SO₂(g)

From the balanced equation,

2 moles of ZnS reacted with 3 moles of O₂

<h3>How to determine the excess reactant</h3>

From the balanced equation,

2 moles of ZnS reacted with 3 moles of O₂

Therefore,

4.2 moles of ZnS will react with =(4.2 × 3) / 2 = 6.3 moles of O₂

From the calculations made above, we can see that only 6.3 moles of O₂ out of 6.8 moles given, is required to react completely with 4.2 moles of ZnS.

Thus, ZnS is the limiting reactant and O₂ is the excess reactant.

<h3> How to determine the mole of the excess reactant remaining</h3>

The excess reactant is O₂. Thus the mole remaining after the reaction can be obtained as illustrated below:

  • Mole of O₂ given = 6.8 moles
  • Mole of O₂ that reacted = 6.3 moles
  • Mole of O₂ remaining =?

Mole of O₂ remaining = (Mole of O₂ given) - (Mole of O₂ that reacted)

Mole of O₂ remaining = 6.8 - 6.3

Mole of O₂ remaining = 0.5 mole

Learn more about stoichiometry:

brainly.com/question/25685654

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6 0
1 year ago
On a cold, cloudy day, the local weather forecaster predicts that a high-pressure system will be moving into the area in the nex
Alona [7]
I’m pretty sure it’s either stormy it snowy :)
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3 years ago
The hydrogen and oxygen atoms in a molecule of water are held together by
sergey [27]
Covalent bonds is the answer
8 0
1 year ago
How much more would a 20.0 gallon tank for propane
Jet001 [13]

Answer: 20 + 1 + 3.8 + 2.4 +27 = 54.2

Explanation: 20 gallons plus 1 gallon plus 3.8 plus 2.4 plus 27 equals to a total number of 54.2 gallons for the propane.

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2 years ago
Endorphins are generated in the body during exercise, which leads to better emotional health. Please select the best answer from
Lostsunrise [7]

Answer: Yes the statement is true.

Explanation: Endorphins are chemicals produced by the human bodies to relieve stress and pain.

They are produced mainly by brain and help to transmit electrical signals within nervous system, thus are called as neurotransmitters.

They are also called as "feel good chemicals" as they can act as pain relievers and happiness booster and thus lead to better emotional health.

7 0
3 years ago
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