NEED ASAP!!! Sound energy travels by electromagnetic radiation. True False

Chemistry

1 answer:

xenn [34]2 years ago

6 0

false

Explanation:

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mickey reacts magnesium with 1.0 M of hydrochloric acid. the reaction tales 2 minutes and 34 seconds to complete. what are 2 way

lutik1710 [3]

Answer:

Explanation:

To slow down this reaction, we can use any of the methods listed below:

Increase the size of the magnesium by using solid lumps of the metal. This will take a much faster time to react than powered and granulated magnesium.
Reduce the concentration of the acid.
Let the reaction take place at a much lower temperature than that given.

These conditions will slow down a chemical reaction.

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2 years ago

What is “ location of the merkels cells “

frez [133]

If you could explain what “merkels” are, the question would be more clear.

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In the Hall-Heroult process, a large electric current is passed through a solution of aluminum oxide Al2O3 dissolved in molten c

gtnhenbr [62]

Answer:

1.13 × 10⁶ g

Explanation:

Let's consider the reduction of aluminum (III) from Al₂O₃ to pure aluminum.

Al³⁺ + 3 e⁻ → Al

We can establish the following relations:

1 Ampere = 1 Coulomb / second
The charge of 1 mole of electrons is 96,468 c (Faraday's constant)
1 mole of Al is produced when 3 moles of electrons circulate
The molar mass of Al is 26.98 g/mol.

The mass of aluminum produced under these conditions is:

$90.0 s \times \frac{1s}{620c} \times \frac{96,468c}{1mole^{-} } \times \frac{3mole^{-}}{1molAl} \times \frac{26.98gAl}{1molAl} =1.13 \times 10^{6} g Al$

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Does the fossil record include every species that every lived? Why or why not?

fgiga [73]

No, some species didn’t have bones and things of the such that could become fossilized.

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What does a control group show in an experimental investigation?

kicyunya [14]

Answer:

the effects that the scientists are causing by manipulating varuables

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