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sukhopar [10]
3 years ago
5

Which element is least likely to react with other elements

Chemistry
2 answers:
KIM [24]3 years ago
5 0
The least reactive elements are in the right-most column of the periodic table, and are known as the noble gases. Examples are Helium, Xeon, Neon, Argon, etc.
Anni [7]3 years ago
3 0
Nobles gases, since they all have 8 e- on their last layer of electrons.
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what kind of change occurs when sodium and chlorine combine ? Describe the matter before and after the change
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Chemical change happen cuz these 2 elements will combine to form a new compound which’s NaCl ( table salt )
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3 years ago
A chemistry student needs 45.0mL of pentane for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the stud
Masja [62]

The mass of pentane the student should weigh out is

The density of pentane is 0.626 gcm-3

To calculate the mass of pentane following expression is used,

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mass of pentane = Density of pentane * Volume of pentane

mass of pentane = 0.626 gcm-3 * 45.0 mL

                             = 28.17 g

Here the unit of mass of pentane is g,

However the unit of density is gcm-3 and unit of volume is mL i.e. cm3

Hence,   Mass = gcm-3 * cm3

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The mass of pentane the student should weigh out is 28.17g

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5 0
1 year ago
How many grams of water are produced from reacting 25 grams of oxygen gas with hydrogen gas to produce water?
Serhud [2]

Answer:

take these as notes ig:)

Explanation:

reaction equations to make connections between the reactants and products in reactions. ... pathway: mol of O2 → mol of H2O → grams of H2O. 3.5 mol ... 25 g KClO3 ... How many grams of hydrogen gas are produced from the reaction of 221.

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the answer is A. epicenter :)


5 0
3 years ago
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