How would life be different without polythene

1 answer:

7 0

Without plastic, we wouldn't have as much of an environmental problem as we have now. Even though plastic has a lot of negatives, it's also made our lives a lot easier over past years. ... Our cars would have been different since a lot of the materials used inside are made out of plastic.

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How many molecules are in a 22.8 gram sample of Methane?

vampirchik [111]

The molecular weight of methane (CH4) is 16.04 g / mol.
Therefore:

22.8 grams x (mol) / 16.04 g =

(Grams unit cancel out)

1.42 mol

4 0

3 years ago

Physical property of iron

KATRIN_1 [288]

Then it is C hope it helps :)

5 0

3 years ago

what is the anode material used in the extraction of aluminium by electrolysis and why it needs to be changed at interval

pishuonlain [190]

Answer:

the anode material is graphite(replaceable graphite rods).

The oxygen gas burns away the anode as Carbon dioxide therefore the anode must be replaced continuously.

3 0

3 years ago

Why are electrons held into the nucleus?

devlian [24]

The electrons hold onto the nucleus because of the magnetism and the electricity. <span />

4 0

3 years ago

Why is ammonia (NH₃) classified as a polar molecule?

aleksandr82 [10.1K]

Answer:

Ammonia contains an asymmetrical distribution of electric charge.

Explanation:

Hello there!

In this case, accordingly to the electronegativity difference we can calculate for the N-H bond, and based off our periodic table, which shows an electronegativity of 3.0 and 2.1 for N and H respectively, we obtain:

$DE=3.0-2.1=0.9$

Which is within the range of polar molecule even the both of them are nonmetals. Thus, choices a and b are firstly discarded; nonetheless, even when they are both nonmetals, two of these elements usually have a nonpolar bond, which means that option C is discarded, and therefore, our answer is ammonia contains an asymmetrical distribution of electric charge.

Regards!

6 0

3 years ago