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3 years ago

Why does mass of popcorn stay the same after popping it

Chemistry

1 answer:

Varvara68 [4.7K]3 years ago

3 0

Answer:

Explanation:

it stays the same because the seeds or whatever in the bag was still the pop corn just not fully devloped

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Which pair of atoms has the highest electronegativity difference?

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How many moles are in 75.0 grams of nitrogen gas, N2?

Westkost [7]

Given:

Mass of Nitrogen (N₂) gas = 75 grams

Finding the number of moles of N₂:

We know that the molar mass of N₂ is 28 grams/mole

Number of moles = Given mass / Molar mass

Number of moles = 75 / 28

Number of moles = 2.68 moles

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3 years ago

Determine the chemical formula for the compound, potassiumtrisethylenediamine chromate(III).

Korolek [52]

Answer: The correct answer is (A).

Explanation:

Potassium-trisethylene-diamine chromate(III)

Potassium is coming first in name which means that potassium is present as cation.

In the complex, 3 molecules of 'ethylene-diamine' is present as an dianion and forms a complex with Chromium (III) metal, making the overall charge on the coordination sphere as (-3).

So, to make a neutral complex, 3 potassium ions are required.

Hence, the structure of the complex is $K_3[Cr(NH_2CH_2CH_2NH_2)_3]$

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3 years ago

In periodic table, valance electrons are indicated by

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Valence electrons of elements except the transition elements – the main group elements. While the period number indicates the number of shells, the group number indicates the number of valence electrons in the outermost shell. Specifically, the number in the ones' place. It can never be replaced rarely anyways.

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