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2 years ago

8

2(x+2) -4(2x-3)=4(2x-1)

1 answer:

rodikova [14]2 years ago

8 0

Answer:

x = 10/7

Explanation:

2(x + 2) - 4(2x - 3) = 4(2x - 1),

2x + 4 - 8x + 12 = 8x - 4,

-6x + 16 = 8x - 4,

20 = 14x,

x = 20/14 or 10/7

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monitta

Answer:

Answer : (1) :-

Volume of water filled in the pycnometer is given as = 9.9872 mL.

Mass of pycnometer when filled with water = 23.1148 g.

Mass of empty pycnometer = 13.1455 g.

So, mass of water = (23.1148 - 13.1455) g. = 9.9693 g.

We know that,

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andre [41]

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The heat released by the reaction is absorbed by the calorimeter and the solution.

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c = heat capacity of calorimeter = 1620 J/K

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Putting values in above equation, we get:

$q=1620J/K\times 0.15K=243J$

<u>Sign convention of heat:</u>

When heat is absorbed, the sign of heat is taken to be positive and when heat is released, the sign of heat is taken to be negative.

For the given chemical reaction:

$S\text{ (monoclinic)}\rightarrow S\text{ (orthorhombic)}$

We are given:

Moles of monoclinic sulfur = 1 mole

To calculate the enthalpy change of the reaction, we use the equation:

$\Delta H_{rxn}=\frac{q}{n}$

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q = amount of heat released = -243 J

n = number of moles = 1 mole

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Putting values in above equation, we get:

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