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3 years ago

Which subctant will not conduct electricity a Aluminium b copper c plastic d steel

Chemistry

2 answers:

jolli1 [7]3 years ago

4 0

Answer:

plastic

Explanation:

yuradex [85]3 years ago

3 0

plastic doesn't conduct electricity

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The lithospheric plates float on top of the _______, which is a weak part of the mantle that flows slowly.

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<span>The lithospheric plates float on top of the _______, which is a weak part of the mantle that flows slowly.
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asthenosphere

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4 years ago

A chemist requires 5.00 liters of 0.420 M H2SO4 solution. How many grams of H2SO4 should the chemist dissolve in water? 129 gram

natali 33 [55]

Answer:

Approximately 206 grams.

Explanation:

How many moles of sulfuric acid $\mathrm{H_2SO_4}$ are there in this solution?

$\text{Number of moles of solute} = \text{Concentration} \times \text{Volume}$ .

The unit for concentration " $\mathrm{M}$ " is equivalent to mole per liter. In other words, $\rm 1\;M = 1\; mol\cdot L^{-1}$ . For this solution, the concentration of $\mathrm{H_2SO_4}$ is $\rm 0.420\;M = 0.420\; mol\cdot L^{-1}$ .

$\begin{aligned}n(\mathrm{H_2SO_4}) &= c(\mathrm{H_2SO_4}) \cdot V\\&= \rm 0.420\;mol\cdot L^{-1}\times 5.00\; L \\&= \rm 2.10\; mol\end{aligned}$ .

What's the mass of that $\rm 2.10\; mol$ of $\mathrm{H_2SO_4}$ ?

Start by finding the molar mass $M$ of $\mathrm{H_2SO_4}$ .

Relative atomic mass data from a modern periodic table:

H: 1.008;
S: 32.06;
O: 15.999.

$\displaystyle M(\mathrm{H_2SO_4}) = 2\times \underbrace{1.008}_{\mathrm{H}} + 1\times \underbrace{32.06}_{\mathrm{S}} + 4\times \underbrace{15.999}_{\mathrm{O}} = \rm 98.072\;g\cdot mol^{-1}$ .

$\text{Mass} = \text{Quantity in moles} \times \text{Molar Mass}$ .

$m = n \cdot M = \rm 2.10\; mol \times 98.072\;g\cdot mol^{-1} \approx 206\; g$ .

In other words, the chemist shall need approximately 206 grams of $\mathrm{H_2SO_4}$ to make this solution. As a side note, keep in mind that the 206 grams of $\mathrm{H_2SO_4}$ also take up considerable amount of space. Therefore it will take less than 5.00 L of water to make the 5.00 L solution.

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4 years ago

Describe what happens to the particles in a chocolate bar as it melts.

Margarita [4]

Answer:

The correct answer is d. As the chocolate bar changes from a solid to a liquid the particles move around more.

Explanation:

When a chocolate bar melts, it suffers a <u>physical</u> change: a change of state from solid to liquid. In the liquid state, the particles move around more, because they have more kinetic energy (more velocity) and more freedom to move than in solid state. Thus, as the solid became into a liquid, the particles move more.

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4 years ago

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Which of the following would most likely happen if water did not form hydrogen bonds?

shtirl [24]

The water would become polluted.

8 0

3 years ago

Can someone please help me. Thank uu

DedPeter [7]

Answer:

aight I will help but I have a challenge for you: go down for answers :)

Explanation:

D a m n you actually came down, first person to believe me lol

anyways bye bye I have small brain so I don't know lol

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3 years ago

Which subctant will not conduct electricity a Aluminium b copper c plastic d steel​

Which subctant will not conduct electricity a Aluminium b copper c plastic d steel