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prohojiy [21]
4 years ago
11

Answer the following questions in one word.

Chemistry
1 answer:
Elis [28]4 years ago
4 0

Answer:

its a feeling accompanied by different situation.

Explanation:

For instance; when we are having a lot of problems,obstacles, hindrances at the path of success we feel pain. Secondly,When we are left by someone then we feel sad.last but not the least while we are getting a lot of love from someone whom we love a lot, at this moment we can feel a state of happiness.

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PLEASE HELP.!
Agata [3.3K]

Answer:

C

Explanation:

6 0
3 years ago
What is the sum of the coefficients needed to balance the combustion reaction of methane?
pishuonlain [190]

Answer:  The sum of the coefficients needed to balance the combustion reaction of methane is 6.

Explanation:

Combustion is a chemical reaction in which hydrocarbons are burnt in the presence of oxygen to give carbon dioxide and water.

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The chemical equation for combustion of methane will be :

CH_4+2O_2\rightarrow CO_2+2H_2O

The coefficient foer methane is 1 , 2 for oxygen , 1 for carbon dioxide and 2 for water. The sum is 6.

4 0
3 years ago
A solution is made by mixing 33.0 ml of ethanol, C2H6O and 67.0 ml of water. Assuming ideal behavior, what is the vapor pressure
ivann1987 [24]
Grams ethanol = 33 ml times .789 gms/ml = 26.037 gms 

<span>Moles ethanol = 26.037 gms / 46 gms/mole = .57 moles </span>

<span>Moles water = 67 ml or 67 grams/18 gms/mole = 3.22 moles </span>

<span>total moles = .57 + 3.72 = 4.29 moles </span>

<span>Mole fraction ethanol = .57 moles ethanol / 4.29 moles total = 0.13</span>

<span>Moles fraction water = 3.72 moles water / 4.29 moles total = 0.87</span>

<span>Partial pressure of ethanol = mole fraction ethanol (.13) _ times VP ethanol 43.9 torr) = 5.707 torr </span>

<span>partial pressure water = mole fraction water .87) times VP water (l7.5 torr) = 15.23 torr </span>

<span>Total vapor pressure over solution = 5.71 torr + 15.23 torr = 20.94 torr</span>
7 0
4 years ago
Pure substance uniform
Lerok [7]
What? there isn’t a question here
6 0
3 years ago
A self-contained living thing
sleet_krkn [62]
The correct answer Organism
3 0
3 years ago
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