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3 years ago

Somebody please help me ?

Chemistry

1 answer:

statuscvo [17]3 years ago

3 0

Its the second one. Add the exponents and you'll get 7

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Which particles may be gained lost or shared by an atom when it forms a chemical bond?

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Sulfur undergoes combustion to yield sulfur trioxide by the following reaction equation:

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Answer:

Therefore, the amount of heat produced by the reaction of 42.8 g S = (-5.2965 × 10²) kJ = (-5.2965 × 10⁵) J

Explanation:

Given reaction: 2S + 3O₂ → 2 SO₃

Given: The enthalpy of reaction: ΔH = - 792 kJ

Given mass of S: w₂ = 42.8 g, Molar mass of S: m = 32 g/mol

In the given reaction, the number of moles of S reacting: n = 2

As, Number of moles: $n = \frac{mass\: (w_{1})}{molar\: mass\: (m)}$

∴ mass of S in 2 moles of S: $w_{1} = n \times m = 2\: mol \times 32\: g/mol = 64\: g$

Given reaction: 2S + 3O₂ → 2 SO₃

In this reaction, the limiting reagent is S

⇒ 2 moles S produces (- 792 kJ) heat.

or, 64 g of S produces (- 792 kJ) heat.

∴ 42.8 g of S produces (x) amount of heat

⇒ The amount of heat produced by 42.8 g S:

$x = \frac{(- 792\: kJ) \times 42.8\: g}{64\: g} = (-529.65)\: kJ$

$\Rightarrow x = (-5.2965 \times 10^{2})\: kJ = (-5.2965 \times 10^{5})\: J$

$(\because 1 kJ = 10^{3} J)$

Therefore, the amount of heat produced by the reaction of 42.8 g S = (-5.2965 × 10²) kJ = (-5.2965 × 10⁵) J

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3 years ago

The isotope of carbon used in archaeological dating is 14^6C . How many protons, neutrons, and electrons does an atom of 14^6C h

vampirchik [111]

Answer:

Explanation:

Isotope given:

¹⁴₆C

In specie written as this;

Superscript = Mass number

Subscript = Atomic number

To find the protons, it is the same as the atomic number;

Protons = Atomic number = 6

Neutrons have no charges;

Neutrons = Mass number - Atomic number =

Neutrons = 14 - 6 = 8

The number of electrons is the same as the atomic number = 6

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Answer:

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