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2 years ago

Which physical state of nitrogen has the highest entropy? (1 point) solid liquid gas vapor?

1 answer:

3 0

Answer is. gas <span>has the highest entropy.
</span>Entropy is the measure of the molecular disorder<span> and it is system’s thermal </span>energy<span> per unit </span>temperature<span> that is unavailable for doing useful </span>work<span>.
Nitrogen molecules have weakest intermolecular bonds in gas phase and move fast and without order. In solid state movement is much more less.
</span><span>

</span>

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The combustion of propane may be described by the chemical equation C 3 H 8 ( g ) + 5 O 2 ( g ) ⟶ 3 CO 2 ( g ) + 4 H 2 O ( g ) C

Kipish [7]

Answer: 72 grams of $O_2(g)$ are needed to completely burn 19.7 g $C_3H_8(g)$

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to molecular mass and contains avogadro's number $6.023\times 10^{23}$ of particles.

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Putting in the values we get:

$\text{Number of moles}=\frac{19.7g}{44g/mol}=0.45moles$

$C_3H_8(g)+5O_2(g)\rightarrow 3CO_2(g)+4H_2O(g)$

According to stoichiometry:

1 mole of $C_3H_8$ requires 5 moles of oxygen

0.45 moles of $C_3H_8$ require= $\frac{5}{1}\times 0.45=2.25$ moles of oxygen

Mass of $O_2=moles\times {\text {Molar mass}}=2.25\times 32=72g$

72 grams of $O_2(g)$ are needed to completely burn 19.7 g $C_3H_8(g)$

7 0

3 years ago

28: Which of the following alloys does not contain copper? 1.Duralumin 2. Bronze 3.Steel 4.Brass 5.Solder

Alja [10]

Answer:

<h2>5.Solder........</h2><h3>Hope it helps you!!</h3>

8 0

3 years ago

How many atoms of Mg are present in 97.22 grams of Mg?

Hitman42 [59]

Answer:

b.......

Explanation:

b.....

5 0

3 years ago

1. A fossil is the remains or traces of organisms that lived in the past.

algol13

Answer:

Is this from edge?

if so which lesson is it from and is this an assignment or a quiz?

I think the answer is C (Much of the evidence for evolution comes from fossils.)

4 0

2 years ago

If an objects parallax cannot be detected what is the most likely to be true about the object

vovikov84 [41]

The distance of the object could be much bigger if <span>an object,s parallax cannot be detected. It is because t</span>he parallax of an object is inversely proportional to the object's distance from us. I hope my answer has come to your help. God bless and have a nice day ahead!

3 0

3 years ago