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Sergeeva-Olga [200]
4 years ago
12

How to solve for enthalpy for changes​

Chemistry
1 answer:
Natasha_Volkova [10]4 years ago
7 0
Always use this method !!! always

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A mixture of benzene and toluene has a total vapor pressure at 25°C of 45.06 mmHg. What is the partial pressure of benzene in th
SashulF [63]

Answer:

I just need points so ignore my answer and thanks

3 0
3 years ago
When aluminum is placed in concentrated hydrochloric acid, hydrogen gas is produced. 2 Al ( s ) + 6 HCl ( aq ) ⟶ 2 AlCl 3 ( aq )
Dovator [93]

Answer:

The volume of hydrogen gas produced at STP is 4.90 liters.

Explanation:

2Al (s) + 6 HCl (aq)\rightarrow 2 AlCl_3 (aq) + 3 H_2 (g)

Moles of aluminium =\frac{3.60 g}{27 g/mol}=0.1333 mol

According to reaction , 2 moles of aluminium gives 3 moles of hydrogen gas.

Then 0.1333 moles of aluminium will give:

\frac{3}{2}\times 0.1333 mol=0.2 moles of hydrogen gas

Volume of 0.2 moles of hydrogen gas at STP = V

Temperature at STP = T = 298.15 K

Pressure at STP = P = 1 atm

n = 0.2 mol

PV = nRT (Ideal gas equation)

V=\frac{nRT}{P}=\frac{0.2mol\times 0.0821 atm L/mol K\times 298.15 K}{1 atm}=4.8956 L\approx 4.90 L

The volume of hydrogen gas produced at STP is 4.90 liters.

4 0
4 years ago
Please help bbg'sssss
shutvik [7]

Answer:

Explanation:

from the way the trees look, i would say A: Wind from the sky, it seems B: Clouds and in the distance C:Precipitation(rain)

7 0
3 years ago
This image represents what?
Licemer1 [7]

Answer:

nitrogen atoms

Explanation:

3 0
4 years ago
Given the unbalanced equation which represents aluminum metals reacting with an acid:
Alona [7]

There are three number of electrons lost by 1 mole of aluminium because aluminum has +3 charge on it.

<h3>What is cation?</h3>

When an atom loses electron, positive charge appears on the atom this is called cation. In this reaction we can see that aluminium has +3 charge which means that it loses 3 electrons.

So we can conclude that There are three number of electrons lost by 1 mole of aluminium because aluminum has +3 charge on it.

Learn more about electron here: brainly.com/question/23390564

#SPJ1

7 0
2 years ago
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