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Maslowich
4 years ago
10

Current is described as

Chemistry
1 answer:
mrs_skeptik [129]4 years ago
3 0
The answer is B the flow of electrons through a substance
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PLEASE HELP ASAP
Inessa05 [86]

The enthalpy change for the reaction 2K + S + K2S using the following thermochemical reactions is mathematically given as

dn=70.7kg

<h3>What is the enthalpy change for the reaction?</h3>

Generally, the equation for the  Chemical reaction is mathematically given as

2k+s----->K2S

Therefore

KS+K----->K2S

Therefore

dn=dn1+dn2

dn=32.5+38.2

dn=70.7kg

In conclusion,  the enthalpy change is

dn=70.7kg

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2 years ago
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Explanation:

An observation is defined as the process which explains how it is happening (qualitative) and and quantitatively able to measure something about the process.

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A theory is defined as the explanation of an aspect of natural world that can be tested, modified or rejected as a result of further experiments.

Hence, the given statements are classified as follows.

(a) All matter is made of tiny, indestructible particles called atoms - Theory

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(c) In chemical reactions, matter is neither created nor destroyed - Law

(d)  When a match burns, heat is evolve - Observation

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Explanation:

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