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Bogdan [553]
3 years ago
13

Why do scientists measure and record mass instead of weight

Chemistry
2 answers:
Natalija [7]3 years ago
8 0
The mass of our body remains constant everywhere...let it be on moon, sun or jupiter whereas weight changes everytime the gravitational force of a place changes. For example: if we are on moon, our mass is the same as in earth but our weight is 1/6 of the one on earth. To find our weight, knowing our mass is essential. So, mass is easier to find than weight. We must know that mass and weight are complete different things.
wariber [46]3 years ago
3 0
Mass is easier to get than the weight. weight is something that can change on the spot.<span />
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Volume is the quantity of three-dimensional space enclosed by a closed surface, for example, the space that a substance (solid, liquid, gas, or plasma) or shape occupies or contains. Volume is often quantified numerically using the SI derived unit, the cubic metre.

Explanation:

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Se construye una pila galvánica con una barra de cobre sumergida en una disolución 1M de cationes Fe+2 y una barra de plata sume
pashok25 [27]

Answer:

El potencial celular estándar, E_{cell} is +0.46 V

Explanation:

Las reacciones de media célula son;

Media reacción del ánodo Cu²⁺ + 2e⁻ ↔ Cu, E ° = 0.34 V

Media reacción catódica 2Ag + 2e⁻ ⁻ 2Ag, E ° = 0.80 V

Sin embargo tenemos para hierro Fe²⁺ + 2e⁻ ↔ Fe, E ° -0.44 V

y Fe³⁺ + e⁻ ↔ Fe²⁺, E ° = 0.77 V

 que es más alta que la del cobre presente, por lo tanto, el cobre se oxidará en el ánodo

Por lo tanto, en el ánodo, tendremos

Cu → Cu²⁺ + 2e⁻ (E ° = -0.34 V)

En el cátodo

2Ag + 2e⁻ → 2Ag (E ° = 0.80 V)

E_{cell} = E_c + E_a = -0.34 + 0.8 = +0.46 \, V

El potencial celular estándar, E_{cell} = +0.46 V

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3 years ago
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