Engineers are starting on a new project to develop technology. Which of these

Chemistry

1 answer:

KATRIN_1 [288]2 years ago

3 0

Answer:

Explanation:

Deciding whether the best product has been designed,should be the last step.

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Which statement regarding liquids is true? 1.can be converted to solids by adding energy in the form of heat 2.occupy a definite

GuDViN [60]

Answer:

4.occupy a definite volume while taking the shape of their container.

Explanation:

Since the particles in a liquid are quite close together (not as close as a solid) they have a definete volume, and the particles are still able to move around as they wish they have no definite shape and take upon the shape of the container they are placed in.

8 0

3 years ago

Zinc is used as a coating for steel to protect the steel from environmental corrosion. If a piece of steel is submerged in an el

sweet [91]

Answer:

A) 3.17 g of Zn

Explanation:

Let's consider the reduction of Zn(II) that occurs in an electrolysis bath.

Zn⁺²(aq) + 2e⁻ → Zn(s)

We can establish the following relations:

1 min = 60 s
1 A = 1 C/s
The charge of 1 mole of electrons is 96,468 C (Faraday's constant).
When 2 moles of electrons circulate, 1 mole of Zn is deposited.
The molar mass of Zn is 65.38 g/mol

The mass of Zn deposited under these conditions is:

$24min \times \frac{60s}{1min} \times \frac{6.5C}{s} \times \frac{1mol\ e^{-} }{96,468C} \times \frac{1molZn}{2mol\ e^{-}} \times \frac{65.38g}{1molZn} = 3.17 g$